Form 8-K

8-K — CORNING INC /NY

Accession: 0000024741-26-000273

Filed: 2026-10-27

Period: 2026-10-27

CIK: 0000024741

SIC: 3357 (DRAWING AND INSULATING NONFERROUS WIRE)

Item: Results of Operations and Financial Condition

Item: Financial Statements and Exhibits

Documents

8-K — glw-20261027.htm (Primary)

EX-99 (glw-20261027xex99xq32026.htm)

XML — IDEA: XBRL DOCUMENT (R1.htm)

8-K

8-K (Primary)

Filename: glw-20261027.htm · Sequence: 1

glw-20261027

0000024741CORNING INC /NYfalse00000247412026-10-272026-10-270000024741us-gaap:CommonStockMember2026-10-272026-10-270000024741glw:A4.125NotesDue2031Member2026-10-272026-10-27

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934

Date of Report: (Date of earliest event reported) October 27, 2026

CORNING INCORPORATED

(Exact name of registrant as specified in its charter)

Commission file number: 1-3247

New York 16-0393470

(State or other jurisdiction of incorporation) (I.R.S. Employer Identification No.)

One Riverfront Plaza, Corning, New York

14831

(Address of principal executive offices) (Zip Code)

607-974-9000

(Registrant’s telephone number, including area code)

N/A

(Former name or former address, if changed since last report)

Securities registered pursuant to Section 12(b) of the Act:

Title of each class Trading Symbol(s) Name of each exchange on which registered

Common Stock, $0.50 par value per share GLW New York Stock Exchange

4.125% Notes due 2031 GLW31 New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 ((§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company o

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

o Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

o Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

o Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

o Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 2.02. Results of Operations and Financial Condition

The Corning Incorporated press release dated October 27, 2026 regarding its financial results for the third-quarter ended September 30, 2026 is attached hereto as Exhibit 99.

In accordance with General Instruction B.2 of Form 8-K, the information in this Current Report on Form 8-K, shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liability of that section, and shall not be incorporated by reference into any registration statement or other document filed under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

Item 9.01. Financial Statements and Exhibits

(d) Exhibit

Press Release dated October 27, 2026, issued by Corning Incorporated

104 Cover Page Interactive File (the cover page tags are embedded within the Inline XBRL document).

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

CORNING INCORPORATED

Registrant

Date: October 27, 2026

By /s/ Stefan Becker

Stefan Becker

Senior Vice President and Corporate Controller

EX-99

Filename: glw-20261027xex99xq32026.htm · Sequence: 2

Document

Exhibit 99

News Release

FOR RELEASE – Oct. 27, 2026

Corning Delivers Outstanding Third-Quarter Results(1)

CORNING, N.Y. — Corning Incorporated (NYSE: GLW) today announced third-quarter 2026 results that exceeded guidance and provided its outlook for fourth-quarter 2026.

News Summary:

•Corning grew third-quarter core sales 19% year over year to $5.08 billion – the strongest growth since the launch of Springboard – and grew core EPS nearly twice as fast to $0.91.

•Optical Communications continued to drive powerful growth, with Q3 sales up 44% to $2.38 billion; Enterprise Networks grew sales 84%, with Gen AI product sales growing more than 100% year over year.

•Solar grew sales 37% year over year, as production continued to ramp, albeit at a slower pace than anticipated. As productivity continues to improve, so will output and profitability. Additionally, in Q3, U.S. trade action under Section 232 of the Trade Expansion Act of 1962 improves the overall pricing environment and demand for U.S.-made solar products. Overall, the company is making solid progress building a more than $3 billion Solar revenue stream.

•Glass Innovations continued to successfully execute its “More Corning” content strategy, driving adoption of Corning innovations and outperforming TV unit, notebook, and smartphone markets, which have been impacted by memory pricing.

•In the fourth quarter, management expects to grow core sales approximately 19% year over year to a range of $5.2 billion to $5.3 billion and grow core EPS approximately 36% year over year to a range of $0.96 to $1.00.

•Corning’s strong third-quarter results and fourth-quarter outlook demonstrate that the acceleration of growth outlined in the company’s “20-30-40” Springboard Plan has begun.

•In the third quarter, Corning secured four long-term, multibillion-dollar customer agreements, including with Verizon and AT&T. The company’s growing number of major customer agreements underpins the growth outlined in Springboard.

(1)Third-quarter GAAP results: GAAP sales were $4.86 billion, GAAP gross margin was 37.3%, GAAP operating margin was 18.8%, GAAP EPS was $0.78, and operating cash flow was $1.06 billion.

Corning Reports Third-Quarter 2026 Financial Results

Page 2

Wendell P. Weeks, chairman, chief executive officer, and president, said, “We delivered an outstanding third quarter. Year over year, core sales grew 19% to $5.08 billion, and core EPS grew 36% to $0.91. We expanded core gross margin 150 basis points to 40.5%, core operating margin 310 basis points to 22.7%, and core ROIC 330 basis points to 16.7% – with strong adjusted free cash flow of $661 million, while investing more than half a billion in capital expenditures to address demand for our innovations. Our strong results provide excellent proof points of the acceleration of growth outlined in our ‘20-30-40’ Springboard Plan.”

Weeks continued, “We continue to successfully expand our content within customers’ ecosystems and outperform our underlying markets. For example, in Optical Communications, faster adoption of our innovations helped us double our Gen AI sales year over year in the quarter, outpacing GPU unit growth.”

Ed Schlesinger, executive vice president and chief financial officer, said, “When we upgraded Springboard in May, we laid out a path to double our annualized sales run rate from $20 billion to $40 billion by the end of 2030. We also expect to grow earnings faster than sales, with significantly higher ROIC and substantially more free cash flow. To support that growth, we have steadily added capacity, backed by long-term customer agreements that share the cost and risk of expansions. As a result, we have been able to grow adjusted free cash flow to $2.27 billion through the first nine months of 2026 while investing to meet demand.”

Schlesinger continued, “Looking ahead, we expect our outstanding performance to continue. In the fourth quarter, we expect to grow core sales approximately 19% year over year to a range of $5.2 billion to $5.3 billion and grow core EPS approximately 36% year over year to a range of $0.96 to $1.00.”

Third-Quarter 2026 Financial Highlights:

•GAAP sales were $4.86 billion, up 18% year over year. Core sales were $5.08 billion, up 19% year over year.

•GAAP EPS was $0.78, up 56% year over year. Core EPS was $0.91, up 36% year over year. The difference between GAAP and core EPS principally reflects adjustments for hedged exposures, along with discrete tax items. A complete quantitative reconciliation of these and other reconciling items appears in the tables accompanying this release.

•GAAP gross margin was 37.3%. Core gross margin expanded 150 basis points year over year to 40.5%.

•GAAP operating margin was 18.8%. Core operating margin expanded 310 basis points year over year to 22.7%.

•GAAP operating cash flow was $1.06 billion, and adjusted free cash flow was $661 million.

Fourth-Quarter 2026 Outlook:

Corning Reports Third-Quarter 2026 Financial Results

Page 3

Third-Quarter 2026 Results and Comparisons

(In millions, except per-share amounts)

Results (GAAP)

Q3 2026

Q2 2026

Q3 2025

Q/Q Y/Y

Net Sales $4,855 $4,505 $4,100 8 % 18 %

Net Income (1)

$680 $559 $430 22 % 58 %

Diluted EPS $0.78 $0.64 $0.50 22 % 56 %

(1)Represents GAAP net income attributable to Corning Incorporated.

Core Results (Non-GAAP)(1)

Q3 2026

Q2 2026

Q3 2025

Q/Q Y/Y

Core Sales $5,081 $4,738 $4,272 7 % 19 %

Core Net Income $795 $680 $585 17 % 36 %

Core EPS $0.91 $0.78 $0.67 17 % 36 %

(1)Core performance measures are non-GAAP financial measures. The reconciliation between GAAP and non-GAAP measures is provided in the tables following this news release as well as on the company’s website.

Corning Reports Third-Quarter 2026 Financial Results

Page 4

Third-Quarter 2026 Segment Results

(In millions)

The third-quarter results below are prepared on a basis consistent with Corning’s segment reporting as presented in the company’s consolidated financial statements.

Effective in the first quarter of 2026, Corning revised its segment reporting structure to align with its current operating and management structure. As a result, the company created a Glass Innovations segment, combining its former Display and Specialty Materials segments. Corning also created a Solar segment, which includes Hemlock Semiconductor Group and the company’s solar wafer and module manufacturing businesses. Optical Communications and Automotive remain unchanged. All other results will be grouped as Life Sciences and Emerging Growth Businesses. Prior-period results have been recast to conform to the current presentation.

Optical Communications

Q3 2026

Q2 2026

Q3 2025

Q/Q Y/Y

Net Sales $2,379 $2,072 $1,652 15 % 44 %

Net Income $532 $438 $295 21 % 80 %

Glass Innovations

Q3 2026

Q2 2026

Q3 2025

Q/Q Y/Y

Net Sales $1,506 $1,463 $1,560 3 % (3 %)

Net Income $328 $354 $363 (7 %) (10 %)

Automotive

Q3 2026

Q2 2026

Q3 2025

Q/Q Y/Y

Net Sales $470 $471 $454 — % 4 %

Net Income $67 $82 $68 (18 %) (1 %)

Solar

Q3 2026

Q2 2026

Q3 2025

Q/Q Y/Y

Net Sales $436 $438 $319 — % 37 %

Net (Loss) Income ($7) ($7) $30 — % *

*Not meaningful

Life Sciences and Emerging Growth Businesses

Q3 2026

Q2 2026

Q3 2025

Q/Q Y/Y

Net Sales $290 $294 $287 (1 %) 1 %

Net Loss ($28) ($21) ($15) (33 %) (87 %)

Corning Reports Third-Quarter 2026 Financial Results

Page 5

Upcoming Investor Events

On Dec. 1, Corning Incorporated will attend the UBS Global Technology and AI Conference in Scottsdale, Arizona. In addition, the company will schedule management visits to investor offices in select cities. Visit the company’s Investor Relations website for up-to-date information.

Third-Quarter Conference Call Information

The company will host its third-quarter conference call on Tuesday, Oct. 27, at 8:30 a.m. ET. To participate, individuals may preregister here prior to the start of the call. Once the required fields are completed, click “Register.” A telephone number and PIN will be auto generated and will pop up on screen. Participants will have the choice to “Dial In” or have the system “Call Me.” A confirmation email will also be sent with specific dial-in information. To listen to a live audio webcast of the call, go to the company’s Investor Relations events page and follow the instructions.

Presentation of Information in this News Release

This news release includes non-GAAP financial measures. Non-GAAP financial measures are not in accordance with, or an alternative to, GAAP. Corning’s non-GAAP financial measures exclude the impact of items that are driven by general economic conditions and events that do not reflect the underlying fundamentals and trends in the company’s operations. The company believes presenting non-GAAP financial measures assists in analyzing financial performance without the impact of items that may obscure trends in the company’s underlying performance. Definitions of these non-GAAP financial measures and reconciliations of these non-GAAP financial measures to the most directly comparable GAAP financial measures can be found on the company’s website by going to the Investor Relations page and clicking “Quarterly Results” under the “Financials and Filings” tab. These reconciliations also accompany this news release.

With respect to the outlook for future periods, it is not possible to provide reconciliations for these non-GAAP measures because management does not forecast the movement of foreign currencies against the U.S. dollar, or other items that do not reflect ongoing operations, nor does it forecast items that have not yet occurred or are out of management’s control. As a result, management is unable to provide outlook information on a GAAP basis.

Caution Concerning Forward-Looking Statements

The statements contained in this release and related comments by management that are not historical facts or information and contain words such as “will,” “believe,” “anticipate,” “expect,” “intend,” “plan,” “seek,” “see,” “would,” “target,” “estimate,” “forecast” or similar expressions are forward-looking statements. These forward-looking statements are made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995 and include estimates and assumptions related to economic, competitive and legislative developments. Such statements relate to future events that by their nature address matters that are, to different degrees, uncertain. These forward-looking statements relate to, among other things, the Company’s Springboard plan, projected financial and operating performance, anticipated sales opportunities, long-term growth strategy, expected capital deployment, innovation and commercialization plans, and anticipated impacts of customer agreements.

Although the company believes that these forward-looking statements are based upon reasonable assumptions regarding, among other things, current estimates and forecasts, general economic conditions, its knowledge of its business and key performance indicators that impact the company, there can be no assurance that these forward-looking statements will prove to be accurate, as actual results and future events could differ materially from those anticipated in such statements. The company undertakes no obligation to update forward-looking statements if circumstances or management’s estimates or opinions should change except as required by applicable securities laws.

Corning Reports Third-Quarter 2026 Financial Results

Page 6

Some of the risks, uncertainties and other factors that could cause actual results to differ materially from those expressed in or implied by the forward-looking statements include, but are not limited to: global economic trends, competition and geopolitical risks, or an escalation of sanctions, tariffs or other trade tensions between the U.S. and other countries, and related impacts on our businesses’ global supply chains and strategies; changes in macroeconomic and market conditions and market volatility, including developments and volatility arising from health crisis events, inflation, interest rates, the value of securities and other financial assets, precious metals, oil, natural gas, raw materials and other commodity prices and exchange rates (particularly between the U.S. dollar and the Japanese yen, Mexican peso, Chinese yuan, South Korean won, euro and New Taiwan dollar), decreases or sudden increases of consumer demand, and the impact of such changes and volatility on our financial position and businesses; the availability of or adverse changes relating to government grants, tax credits or other government incentives; the duration and severity of health crisis events, such as an epidemic or pandemic, and its impact across our businesses on demand, personnel, operations, our global supply chains and stock price; possible disruption in commercial activities or our supply chain due to terrorist activity, cyber-attack, armed conflict, political or financial instability, natural disasters, international trade disputes or major health concerns; loss of intellectual property due to theft, cyber-attack, or disruption to our information technology infrastructure; ability to enforce patents and protect intellectual property and trade secrets; disruption to Corning’s, our suppliers’ and manufacturers’ supply chain, equipment, facilities, IT systems or operations; product demand and industry capacity; competitive products and pricing; availability and costs of critical components, materials, equipment, natural resources and utilities; new product development and commercialization; our solar business development, including manufacturing facility construction, ramp, and operations, and the achievement of solar revenue and profitability targets; order activity and demand from major customers; the amount and timing of our cash flows and earnings and other conditions, which may affect our ability to pay our quarterly dividend at the planned level or to repurchase shares at planned levels; the amount and timing of any future dividends; the effects of acquisitions, dispositions and other similar transactions; the effect of regulatory and legal developments; ability to pace capital spending to anticipated levels of customer demand; our ability to increase margins through implementation of operational changes, pricing actions and cost reduction measures; rate of technology change; adverse litigation; product and component performance issues; retention of key personnel; customer ability to maintain profitable operations and obtain financing to fund ongoing operations and manufacturing expansions and pay receivables when due; loss of significant customers; changes in tax laws, regulations and international tax standards; the impacts of audits by taxing authorities; the potential impact of legislation, government regulations, and other government action and investigations; and other risks detailed in Corning’s SEC filings.

For a complete listing of risks and other factors, please reference the risk factors and forward-looking statements described in our annual reports on Form 10-K and quarterly reports on Form 10-Q.

Web Disclosure

In accordance with guidance provided by the SEC regarding the use of company websites and social media channels to disclose material information, Corning Incorporated (“Corning”) wishes to notify investors, media, and other interested parties that it uses its website (https://www.corning.com/worldwide/en/about-us/news-events.html) to publish important information about the company, including information that may be deemed material to investors, or supplemental to information contained in this or other press releases. The list of websites and social media channels that the company uses may be updated on Corning’s media and website from time to time. Corning encourages investors, media, and other interested parties to review the information Corning may publish through its website and social media channels as described above, in addition to the company’s SEC filings, press releases, conference calls, and webcasts.

Corning Reports Third-Quarter 2026 Financial Results

Page 7

About Corning Incorporated

Corning (www.corning.com) is one of the world’s leading innovators in materials science, with a 175-year track record of life-changing inventions. Corning applies its unparalleled expertise in glass science, ceramic science, and optical physics, along with its deep manufacturing and engineering capabilities to develop category-defining products that transform industries and enhance people’s lives. Corning succeeds through sustained investment in RD&E, a unique combination of material and process innovation, and deep, trust-based relationships with customers who are global leaders in their industries. Corning’s capabilities are versatile and synergistic, which allows the company to evolve to meet changing market needs, while also helping its customers capture new opportunities in dynamic industries. Today, Corning’s markets include optical communications, mobile consumer electronics, display, automotive, solar, semiconductors, and life sciences.

Media Relations Contact:

Gabrielle Bailey

(607) 684-4557

baileygr@corning.com

Investor Relations Contact:

Christopher Keenan

(607) 974-6716

keenanct@corning.com

Consolidated Statements of Income Corning Incorporated and Subsidiary Companies

(Unaudited; in millions, except per share amounts)

Three months ended

September 30, Nine months ended

September 30,

2026 2025 2026 2025

Net sales $ 4,855 $ 4,100 $ 13,504 $ 11,414

Cost of sales 3,045 2,580 8,538 7,288

Gross margin 1,810 1,520 4,966 4,126

Operating expenses:

Selling, general and administrative expenses 563 624 1,759 1,610

Research, development and engineering expenses 314 280 891 826

Amortization of purchased intangibles 22 27 68 83

Operating income 911 589 2,248 1,607

Interest income 17 10 38 27

Interest expense (87) (78) (273) (243)

Translated earnings contract gain, net 138 33 212 63

Other expense, net (11) (4) (79) (80)

Income before income taxes 968 550 2,146 1,374

Provision for income taxes (222) (80) (383) (219)

Net income 746 470 1,763 1,155

Net income attributable to non-controlling interest (66) (40) (153) (99)

Net income attributable to Corning Incorporated $ 680 $ 430 $ 1,610 $ 1,056

Earnings per common share available to common shareholders:

Basic $ 0.79 $ 0.50 $ 1.87 $ 1.24

Diluted $ 0.78 $ 0.50 $ 1.85 $ 1.21

Consolidated Balance Sheets Corning Incorporated and Subsidiary Companies

(Unaudited; in millions, except share and per share amounts)

September 30,

2026 December 31,

2025

Assets

Current assets:

Cash and cash equivalents $ 2,537 $ 1,526

Trade accounts receivable, net of doubtful accounts 3,101 2,779

Inventories 3,646 3,077

Other current assets 2,058 1,554

Total current assets 11,342 8,936

Property, plant and equipment, net of accumulated depreciation 15,517 14,825

Goodwill 2,484 2,489

Other intangible assets, net 587 657

Deferred income taxes 1,615 1,515

Other assets 2,581 2,554

Total Assets $ 34,126 $ 30,976

Liabilities and Equity

Current liabilities:

Current portion of long-term debt and short-term borrowings $ 933 $ 804

Accounts payable 2,492 1,979

Other accrued liabilities 3,160 2,845

Total current liabilities 6,585 5,628

Long-term debt 7,267 7,630

Postretirement benefits other than pensions 324 314

Other liabilities 5,662 5,097

Total liabilities 19,838 18,669

Commitments and contingencies

Shareholders’ equity:

Common stock – Par value $0.50 per share; Shares authorized 3.8 billion;

Shares issued: 1.9 billion and 1.8 billion

927 924

Additional paid-in capital 18,687 17,580

Retained earnings 17,427 16,551

Treasury stock, at cost; Shares held: 994 million and 992 million

(21,438) (21,143)

Accumulated other comprehensive loss (1,932) (2,105)

Total Corning Incorporated shareholders’ equity 13,671 11,807

Non-controlling interest 617 500

Total equity 14,288 12,307

Total Liabilities and Equity $ 34,126 $ 30,976

Consolidated Statements of Cash Flows Corning Incorporated and Subsidiary Companies

(Unaudited; in millions)

Three months ended

September 30, Nine months ended

September 30,

2026 2025 2026 2025

Cash Flows from Operating Activities:

Net income $ 746 $ 470 $ 1,763 $ 1,155

Adjustments to reconcile net income to net cash provided by

operating activities:

Depreciation 371 310 1,073 913

Amortization of purchased intangibles 22 27 68 83

Loss on disposal of assets, net 35 15 58 20

Share-based compensation expense 48 99 298 216

Translation loss (gain) on foreign denominated debt, net 4 (4) (1) 66

Deferred tax provision (benefit) 56 (110) (45) (149)

Translated earnings contract gain, net (138) (33) (212) (63)

Changes in assets and liabilities:

Trade accounts receivable (161) (226) (416) (429)

Inventories (194) (28) (571) (266)

Other current assets (12) (151) (156) (256)

Accounts payable and other current liabilities 464 450 659 391

Customer deposits and government incentives (70) (92) 639 (49)

Deferred income (43) (38) (145) (108)

Other, net (67) 95 128 119

Net cash provided by operating activities 1,061 784 3,140 1,643

Cash Flows from Investing Activities:

Capital expenditures (545) (334) (1,299) (850)

Proceeds from government incentives 8

Realized gains on translated earnings contracts and other 145 85 423 192

Premiums paid on hedging contracts (43) (49) (145) (83)

Other, net (1) 8 (24)

Net cash used in investing activities (443) (299) (1,005) (765)

Cash Flows from Financing Activities:

Repayments of debt (270) (3) (961) (282)

Proceeds from issuance of debt and short-term borrowings 449 285

Repayment of acquisition related debt (2) (33) (2) (33)

Proceeds from cross currency swap 24

Proceeds from warrants 500

Principal payments on finance leases (41) (8) (106) (24)

Payments of employee withholding tax on stock awards (15) (17) (294) (87)

Proceeds from exercise of stock options 1 19 24 31

Purchases of common stock for treasury (25) (158)

Dividends paid (262) (241) (757) (744)

Other, net (6) (16) (20) (32)

Net cash used in financing activities (595) (324) (1,167) (1,020)

Effect of exchange rates on cash 17 (4) 17 22

Net increase (decrease) in cash and cash equivalents and restricted cash 40 157 985 (120)

Cash and cash equivalents and restricted cash at beginning of period 2,511 1,491 1,566 1,768

Cash and cash equivalents and restricted cash at end of period $ 2,551 $ 1,648 $ 2,551 $ 1,648

Restricted cash included in other current assets 14 14

Cash and cash equivalents at end of period $ 2,537 $ 1,648 $ 2,537 $ 1,648

Corning Incorporated and Subsidiary Companies

GAAP Earnings per Common Share

(Unaudited; in millions, except per share amounts)

The following table sets forth the computation of basic and diluted earnings per common share:

Three months ended

September 30, Nine months ended

September 30,

2026 2025 2026 2025

Net income attributable to Corning Incorporated $ 680 $ 430 $ 1,610 $ 1,056

Weighted-average common shares outstanding - basic 863 856 861 855

Effect of dilutive securities:

Stock options, awards and warrants 8 12 9 15

Weighted-average common shares outstanding - diluted 871 868 870 870

Basic earnings per common share $ 0.79 $ 0.50 $ 1.87 $ 1.24

Diluted earnings per common share $ 0.78 $ 0.50 $ 1.85 $ 1.21

Core Earnings per Share

(Unaudited; in millions, except per share amounts)

The following table sets forth the computation of core earnings per share:

Three months ended

September 30, Nine months ended

September 30,

2026 2025 2026 2025

Core net income $ 795 $ 585 $ 2,087 $ 1,575

Weighted-average common shares outstanding - basic 863 856 861 855

Effect of dilutive securities:

Stock options, awards and warrants 8 12 9 15

Weighted-average common shares outstanding - diluted 871 868 870 870

Core earnings per share $ 0.91 $ 0.67 $ 2.40 $ 1.81

CORE PERFORMANCE MEASURES

Management uses non-GAAP financial measures (our “core performance measures”), together with GAAP financial measures, to evaluate operating performance, make financial and operational decisions, and allocate resources. Management believes that core performance measures, when considered together with the Company’s GAAP results, provide investors with useful supplemental information by facilitating a functional view of operating results and providing additional insight into factors and trends affecting the Company’s performance.

Specifically, in managing the Company and assessing our financial performance, we supplement certain measures included in our consolidated financial statements by excluding specific items and making certain adjustments to arrive at our core performance measures. These measures are intended to supplement, and should not be viewed as a substitute for, the Company’s GAAP financial measures.

Items excluded from certain core performance measures include realized and unrealized gains and losses on our undesignated foreign exchange forward or option contracts and cross-currency swaps, which we refer to as our translated earnings contracts, and on the translation of our foreign-denominated debt. Other excluded items include acquisition-related costs, certain discrete tax items and other tax-related adjustments, restructuring, impairment and other charges and credits, certain litigation, regulatory and other legal matters, pension mark-to-market adjustments, and other items that do not reflect the ongoing operating results of the Company.

Prior to April 1, 2026, we included an adjustment to derive our core performance measures that utilized long-term management-determined core rates, which were used in our presentation of the “constant-currency adjustment.” These core rates were applied to all foreign currency exposures for which we were significantly hedged during the applicable period, even though we may have been less than 100% hedged.

Effective April 1, 2026, we prospectively replaced constant-currency reporting with a new non-GAAP adjustment, which we refer to as our “adjustment for hedged exposures” as discussed in more detail below. The prior constant-currency adjustment and the current adjustment for hedged exposures are distinct non-GAAP adjustments determined using different methodologies.

Because a significant portion of the Company’s revenues and expenses are denominated in currencies other than the U.S. dollar, the Company maintains a foreign currency risk management program whereby it hedges its foreign currency exposure to the Japanese yen, Mexican peso, Chinese yuan, South Korean won, euro and New Taiwan dollar. Management utilizes the adjustment for hedged exposures for the Optical Communications, Glass Innovations and Automotive segments to reflect the Company’s foreign currency risk management program with respect to these currencies, as applicable to each segment. The most significant adjustment relates to the Japanese yen exposure within the Glass Innovations segment. Management believes that this adjustment for hedged exposures is useful for analyzing underlying business trends and establishing operational goals and forecasts by illustrating results aligned with the currency environment established by the Company’s foreign currency risk management program.

The adjustment for hedged exposures is calculated by applying our hedge rates (as defined below) to the portion of foreign currency exposure that is hedged by the Company’s hedging instruments during the applicable period. These hedging instruments include our translated earnings contracts and non-derivative instruments such as foreign-denominated debt. The identification of hedged exposures is consistent with the Company’s documented foreign exchange risk management practices. The remaining portion of foreign currency exposure that is not hedged is not adjusted and continues to be reflected at the exchange rates used in the Company’s consolidated GAAP results during the applicable period. The currency rates used in calculating this adjustment for hedged exposures (our “hedge rates”) reflect the weighted average of the contractual exchange rates of the Company’s hedging instruments in place for foreign currency exposure for the applicable period. The realized and unrealized gains or losses from our translated earnings contracts and non-derivative instruments are excluded from our core performance measures in our GAAP to core reconciliation, and we include the adjustment for hedged exposures to reflect the underlying hedge rates related to these hedging instruments. The adjustment for hedged exposures, when applied to net sales, reflects only the impact of foreign currency exchange rate movements on the hedged portion of exposure.

Management believes the adjustment for hedged exposures provides investors with useful supplemental information regarding operating performance by reflecting the effect of the Company’s foreign currency risk management program on the portion of exposure actually hedged during the applicable period.

Core performance measures for the comparative prior period as presented herein are the amounts as historically reported. The prior constant-currency adjustment and the current adjustment for hedged exposures are distinct non-GAAP adjustments determined using different methodologies and reflect different foreign currency hedging approaches in the periods presented. Prior-period amounts have not been recast to the current-period presentation. Application of the current adjustment for hedged exposures in place of the prior constant-currency adjustment for the comparative 2025 periods would have resulted in higher year-over-year growth rates for core net sales, core net income and core earnings per share for the three and nine months ended September 30, 2026.

For a reconciliation of non-GAAP performance measures to their most directly comparable GAAP financial measure, refer to “Reconciliation of Non-GAAP Measures.” With respect to the outlook for future periods, it is not possible to provide reconciliations for these non-GAAP measures because management does not forecast the movement of foreign currencies against the U.S. dollar, or other items that do not reflect ongoing operations, nor does it forecast items that have not yet occurred or are out of management’s control. As a result, management is unable to provide outlook information on a GAAP basis.

Reconciliation of Non-GAAP Measures Corning Incorporated and Subsidiary Companies

(Unaudited; in millions, except per share amounts)

Three months ended September 30, 2026

Net sales Income before income taxes Net income attributable to Corning Incorporated Effective tax rate (a)(b) Per Share

As reported - GAAP $ 4,855 $ 968 $ 680 22.9 % $ 0.78

Adjustment for hedged exposures (1)

226 216 175 0.20

Translation loss on foreign denominated debt, net (2)

4 4 0.00

Translated earnings contract gain, net (3)

(138) (106) (0.12)

Acquisition-related costs (4)

(1) (1) (0.00)

Discrete tax items and other tax-related adjustments (5)

45 0.05

Restructuring, impairment and other charges and credits (6)

8 (1) (0.00)

Pension mark-to-market adjustment (7)

(3) (3) (0.00)

Loss on investments (8)

4 3 0.00

Litigation, regulatory and other legal matters (9)

(1) (1) (0.00)

Core performance measures $ 5,081 $ 1,057 $ 795 18.5 % $ 0.91

(a)Based upon statutory tax rates in the specific jurisdiction for each item.

(b)The calculation of the effective tax rate for GAAP and Core excludes net income attributable to non-controlling interest of approximately $66 million and $67 million, respectively.

Three months ended June 30, 2026

Net sales Income before income taxes Net income attributable to Corning Incorporated Effective tax rate (a)(b) Per Share

As reported - GAAP $ 4,505 $ 649 $ 559 6.2 % $ 0.64

Adjustment for hedged exposures (1)

233 208 159 0.18

Translation loss on foreign denominated debt, net (2)

1 1 0.00

Translated earnings contract gain, net (3)

(90) (68) (0.08)

Acquisition-related costs (4)

26 18 0.02

Discrete tax items and other tax-related adjustments (5)

(79) (0.09)

Restructuring, impairment and other charges and credits (6)

71 60 0.07

Pension mark-to-market adjustment (7)

22 18 0.02

Loss on investments (8)

13 13 0.01

Gain on sale of business (10)

(2) (1) (0.00)

Core performance measures $ 4,738 $ 898 $ 680 18.5 % $ 0.78

(a)Based upon statutory tax rates in the specific jurisdiction for each item.

(b)The calculation of the effective tax rate for GAAP and Core excludes net income attributable to non-controlling interest of approximately $50 million and $51 million, respectively.

Refer to “Items Adjusted from GAAP Measures” for the descriptions of the footnoted reconciling items.

Reconciliation of Non-GAAP Measures Corning Incorporated and Subsidiary Companies

(Unaudited; in millions, except per share amounts)

Three months ended September 30, 2025

Net sales

Income before income taxes

Net income attributable to Corning Incorporated

Effective tax rate (a)(b) Per Share

As reported - GAAP $ 4,100 $ 550 $ 430 14.5 % $ 0.50

Constant-currency adjustment (1)

172 157 111 0.13

Translation gain on foreign denominated debt, net (2)

(4) (4) (0.00)

Translated earnings contract gain, net (3)

(33) (25) (0.03)

Acquisition-related costs (4)

30 22 0.03

Discrete tax items and other tax-related adjustments (5)

(21) (0.02)

Restructuring, impairment and other charges and credits (6)

16 12 0.01

Pension mark-to-market adjustment (7)

12 9 0.01

Loss on investments (8)

1 1 0.00

Litigation, regulatory and other legal matters (9)

50 50 0.06

Core performance measures $ 4,272 $ 779 $ 585 19.5 % $ 0.67

(a)Based upon statutory tax rates in the specific jurisdiction for each item.

(b)The calculation of the effective tax rate for GAAP and Core excludes net income attributable to non-controlling interest of approximately $40 million and $41 million, respectively.

Refer to “Items Adjusted from GAAP Measures” for the descriptions of the footnoted reconciling items.

Reconciliation of Non-GAAP Measures Corning Incorporated and Subsidiary Companies

(Unaudited; in millions, except per share amounts)

Nine months ended September 30, 2026

Net sales Income before income taxes Net income attributable to Corning Incorporated Effective tax rate (a)(b) Per Share

As reported - GAAP $ 13,504 $ 2,146 $ 1,610 17.8 % $ 1.85

Adjustment for hedged exposures (1)

459 424 334 0.38

Constant-currency adjustment (1)

201 180 135 0.16

Translation gain on foreign denominated debt, net (2)

(1) 0.00

Translated earnings contract gain, net (3)

(212) (162) (0.19)

Acquisition-related costs (4)

70 51 0.06

Discrete tax items and other tax-related adjustments (5)

(4) (0.00)

Restructuring, impairment and other charges and credits (6)

123 101 0.12

Pension mark-to-market adjustment (7)

18 14 0.02

Loss on investments (8)

23 22 0.03

Litigation, regulatory and other legal matters (9)

(1) (1) (0.00)

Gain on sale of business (10)

(2) (1) (0.00)

Gain on sale of assets (11)

(16) (12) (0.01)

Core performance measures $ 14,164 $ 2,752 $ 2,087 18.5 % $ 2.40

(a)Based upon statutory tax rates in the specific jurisdiction for each item.

(b)The calculation of the effective tax rate for GAAP and Core excludes net income attributable to non-controlling interest of approximately $153 million and $156 million, respectively.

Nine months ended September 30, 2025

Net sales Income before income taxes Net income attributable to Corning Incorporated Effective tax rate (a)(b) Per Share

As reported - GAAP $ 11,414 $ 1,374 $ 1,056 15.9 % $ 1.21

Constant-currency adjustment (1)

582 496 404 0.46

Translation loss on foreign denominated debt, net (2)

66 50 0.06

Translated earnings contract gain, net (3)

(63) (48) (0.06)

Acquisition-related costs (4)

89 65 0.07

Discrete tax items and other tax-related adjustments (5)

(56) (0.06)

Restructuring, impairment and other charges and credits (6)

10 8 0.01

Pension mark-to-market adjustment (7)

27 21 0.02

Litigation, regulatory and other legal matters (9)

57 55 0.06

Loss on sale of business (10)

11 7 0.01

Loss on sale of assets (11)

5 4 0.00

Equity in losses of affiliated companies (12)

12 9 0.01

Core performance measures $ 11,996 $ 2,084 $ 1,575 19.5 % $ 1.81

(a)Based upon statutory tax rates in the specific jurisdiction for each item.

(b)The calculation of the effective tax rate for GAAP and Core excludes net income attributable to non-controlling interest of approximately $99 million and $102 million, respectively.

Refer to “Items Adjusted from GAAP Measures” for the descriptions of the footnoted reconciling items.

Reconciliation of Non-GAAP Measures Corning Incorporated and Subsidiary Companies

(Unaudited; in millions)

Three months ended September 30, 2026

Gross

margin Gross

margin % Selling, general and administrative expenses Research, development and engineering expenses Operating

income Operating

margin %

As reported - GAAP $ 1,810 37.3 % $ 563 $ 314 $ 911 18.8 %

Adjustment for hedged exposures (1)

214 1 213

Acquisition-related costs (4)

25 (3)

Restructuring, impairment and other charges and credits (6)

35 35

Pension mark-to-market adjustment (7)

2 1 (3)

Litigation, regulatory and other legal matters (9)

1 (1)

Core performance measures $ 2,059 40.5 % $ 592 $ 315 $ 1,152 22.7 %

Three months ended September 30, 2025

Gross

margin Gross

margin % Selling, general and administrative expenses Research, development and engineering expenses Operating

income Operating

margin %

As reported - GAAP $ 1,520 37.1 % $ 624 $ 280 $ 589 14.4 %

Constant-currency adjustment (1)

156 1 155

Acquisition-related costs (4)

Restructuring, impairment and other charges and credits (6)

(12) (16) 4

Pension mark-to-market adjustment (7)

(9) (4) 13

Litigation, regulatory and other legal matters (9)

(50) 50

Core performance measures $ 1,664 39.0 % $ 550 $ 276 $ 838 19.6 %

Refer to “Items Adjusted from GAAP Measures” for the descriptions of the footnoted reconciling items.

Reconciliation of Non-GAAP Measures Corning Incorporated and Subsidiary Companies

(Unaudited; in millions)

Nine months ended September 30, 2026

Gross

margin Gross

margin % Selling, general and administrative expenses Research, development and engineering expenses Operating

income Operating

margin %

As reported - GAAP $ 4,966 36.8 % $ 1,759 $ 891 $ 2,248 16.6 %

Adjustment for hedged exposures (1)

421 2 419

Constant-currency adjustment (1)

177 1 176

Acquisition-related costs (4)

5 63

Restructuring, impairment and other charges and credits (6)

85 (25) 110

Pension mark-to-market adjustment (7)

(15) (3) 18

Litigation, regulatory and other legal matters (9)

1 (1)

Gain on sale of assets (11)

(16) (16)

Core performance measures $ 5,633 39.8 % $ 1,728 $ 888 $ 3,017 21.3 %

Nine months ended September 30, 2025

Gross

margin Gross

margin % Selling, general and administrative expenses Research, development and engineering expenses Operating

income Operating

margin %

As reported - GAAP $ 4,126 36.1 % $ 1,610 $ 826 $ 1,607 14.1 %

Constant-currency adjustment (1)

495 4 1 490

Acquisition-related costs (4)

1 82

Restructuring, impairment and other charges and credits (6)

(15) (17) 2

Pension mark-to-market adjustment (7)

(20) (6) 26

Litigation, regulatory and other legal matters (9)

(57) 57

Loss on sale of assets (11)

5 5

Core performance measures $ 4,611 38.4 % $ 1,521 $ 821 $ 2,269 18.9 %

Refer to “Items Adjusted from GAAP Measures” for the descriptions of the footnoted reconciling items.

Reconciliation of Non-GAAP Measures Corning Incorporated and Subsidiary Companies

(Unaudited; in millions)

Three months ended

September 30, Nine months ended

September 30,

2026 2025 2026 2025

Cash flows from operating activities $ 1,061 $ 784 $ 3,140 $ 1,643

Realized gains on translated earnings contracts and other $ 145 $ 85 $ 423 $ 192

Adjusted cash flows from operating activities $ 1,206 $ 869 $ 3,563 $ 1,835

Less: Capital expenditures $ 545 $ 334 $ 1,299 $ 850

Plus: Proceeds from government incentives $ 8

Adjusted free cash flow $ 661 $ 535 $ 2,272 $ 985

Core return on invested capital (“core ROIC”) is a non-GAAP measure used by management and can be used by investors to review our investment and capital allocation decisions. We define core ROIC as the after-tax core operating income, inclusive of core equity earnings from affiliated companies, as a percentage of invested capital, calculated as total equity plus total long-term debt. Core ROIC for the three months ended September 30, 2026 and 2025 is calculated by annualizing the after-tax return for the respective period.

Three months ended

September 30,

2026 2025

Core operating income (1)

$ 1,152 $ 838

Core equity earnings in affiliated companies (2)

$ 3 $ 3

Core operating income before interest and taxes $ 1,155 $ 841

Less: Income tax (3)

$ 214 $ 164

Core operating income tax adjusted $ 941 $ 677

Equity $ 14,288 $ 12,005

Debt $ 8,200 $ 8,219

Invested capital $ 22,488 $ 20,224

Core ROIC 16.7 % 13.4 %

(1)Refer to the reconciliation of operating income as reported in our GAAP results to core operating income within the “Reconciliation of non-GAAP measures.”

(2)There was no equity earnings in affiliated companies as of September 30, 2026 as reflected within other expense, net in the consolidated statements of income and $1 million for the three months ended September 30, 2025. The difference between equity earnings in affiliated companies as reported in our GAAP results and as reflected as a non-GAAP core performance measure is an adjustment for hedged exposures reporting for the three months ended September 30, 2026 and an adjustment for constant currency reporting for the three months ended September 30, 2025, as described within “Core Performance Measures.”

(3)Income tax amounts are calculated based on the core effective tax rate of 18.5% and 19.5% for the three months ended September 30, 2026 and September 30, 2025, respectively.

Items Adjusted from GAAP Measures

Items adjusted from GAAP measures to arrive at core performance measures are as follows:

(1)Adjustment for hedged exposures: Effective April 1, 2026, the Company replaced its prior constant-currency adjustment with an adjustment for hedged exposures. Because a significant portion of the Company’s revenues and expenses are denominated in currencies other than the U.S. dollar, the Company maintains a foreign currency risk management program whereby it hedges its exposure to the Japanese yen, Mexican peso, Chinese yuan, South Korean won, euro and New Taiwan dollar. Management uses the adjustment for hedged exposures for the Optical Communications, Glass Innovations and Automotive segments to reflect the impact of that program, as applicable to each segment. The most significant adjustment relates to Japanese yen exposure within the Glass Innovations segment, which primarily impacts net sales.

The prior constant-currency adjustment and the current adjustment for hedged exposures are distinct non-GAAP adjustments determined using different methodologies. Under the prior methodology, management-determined rates were applied to all foreign currency exposures for which we were significantly hedged during the applicable period, even though we may have been less than 100% hedged. Under the current adjustment for hedged exposures, contractual hedge rates are applied only to the portion of exposure actually hedged during the applicable period, and the remaining unhedged exposure is reflected at the exchange rates included in the Company’s consolidated GAAP results. The prior-period amounts presented herein are the amounts as historically reported.

The table below presents the hedge rates used in calculating the adjustment for hedged exposures and the percentage of exposure hedged for the three and nine months ended September 30, 2026, and three months ended June 30, 2026. Percentages are calculated relative to after-tax earnings exposure.

Currency Japanese yen Mexican peso Chinese yuan South Korean won Euro New Taiwan dollar

Three months ended September 30, 2026

Hedge Rate

¥120 MX$21 ¥6.8 ₩1,266 €0.87 NT$31

% of Exposure Hedged 94% 90% 93% 89% 92% 99%

Nine months ended September 30, 2026 (1)

Hedge Rate

¥120 MX$21 ¥6.9 ₩1,262 €0.88 NT$31

% of Exposure Hedged 97% 95% 95% 97% 93% 98%

Three months ended June 30, 2026

Hedge Rate

¥120 MX$20 ¥6.8 ₩1,269 €0.88 NT$31

% of Exposure Hedged 98% 94% 93% 100% 89% 95%

(1)Prior to April 1, 2026, the core rate methodology was applied to all relevant foreign exchange exposures; its effects are reflected in the hedge rates and percentages of exposures hedged for the nine months ended September 30, 2026, as discussed and presented below.

Constant-currency adjustment: Prior to April 1, 2026, the constant-currency rates used were as follows and were applied to all relevant foreign currency exposures during the three months ended March 31, 2026 and three and nine months ended September 30, 2025:

Currency Japanese yen Mexican peso Chinese yuan South Korean won Euro New Taiwan dollar

Core Rate ¥120 MX$21 ¥6.9 ₩1,250 €0.88 NT$31

(2)Translation of foreign denominated debt, net: Amount reflects the gain or loss on the translation of our yen-denominated and euro-denominated debt to U.S. dollars, net of gains or losses on related derivative instruments.

(3)Translated earnings contract, net: Amount reflects the impact of the realized and unrealized gains and losses on our derivative instruments used to hedge Japanese yen, Mexican peso, Chinese yuan, South Korean won, euro and New Taiwan dollar foreign currency exposure related to translated earnings.

(4)Acquisition-related costs: Amount reflects intangible amortization, inventory valuation adjustments, contingent consideration adjustments and external acquisition-related deal costs, as well as other transaction related costs.

(5)Discrete tax items and other tax-related adjustments: Amount reflects certain discrete period tax items such as changes in tax law, the impact of tax audits, changes in tax reserves, changes in deferred tax asset valuation allowances and stock compensation windfall or shortfall, as well as other tax-related adjustments.

(6)Restructuring, impairment and other charges and credits: Amount reflects certain restructuring, impairment losses and other charges and credits, as well as other expenses, including severance, asset write-offs and facility repairs resulting from power outages, which are not related to ongoing operations.

(7)Pension mark-to-market adjustment: Amount primarily reflects defined benefit pension mark-to-market gains and losses, which arise from changes in actuarial assumptions and the difference between actual and expected returns on plan assets and discount rates.

(8)Loss on investments: Amount reflects the loss recognized on investments due to mark-to-market adjustments for the change in fair value or the disposition of an investment.

(9)Litigation, regulatory and other legal matters: Amount reflects developments in commercial litigation, intellectual property disputes, adjustments to our estimated liability for environmental-related items and other legal matters.

(10)Gain or loss on sale of business: Amount reflects the gain or loss recognized for the sale of a business, recorded in other expense, net, on the consolidated statements of income.

(11)Gain or loss on sale of assets: Amount represents the gain or loss recognized for the sale of assets, recorded in cost of sales, on the consolidated statements of income.

(12)Equity in losses of affiliated companies: Amount reflects costs not related to continuing operations of affiliated companies, such as restructuring, impairment losses, inventory adjustments, and other charges and credits.

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Trading symbol of an instrument as listed on an exchange.

+ References

No definition available.

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Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as written communications pursuant to Rule 425 under the Securities Act.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

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-Section 425

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