Form 8-K

8-K — Klaviyo, Inc.

Accession: 0001835830-26-000039

Filed: 2026-08-05

Period: 2026-08-05

CIK: 0001835830

SIC: 7372 (SERVICES-PREPACKAGED SOFTWARE)

Item: Results of Operations and Financial Condition

Item: Financial Statements and Exhibits

Documents

8-K — kvyo-20260805.htm (Primary)

EX-99.1 (confidentialfiscalq22026ea.htm)

XML — IDEA: XBRL DOCUMENT (R1.htm)

8-K

8-K (Primary)

Filename: kvyo-20260805.htm · Sequence: 1

kvyo-20260805

FALSE000183583000018358302026-08-052026-08-05

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 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): August 5, 2026

Klaviyo, Inc.

(Exact name of registrant as specified in its charter)

___________________________________

Delaware

(State or other jurisdiction of

incorporation or organization)

001-41806

(Commission File Number)

46-0989964

(IRS Employer Identification Number)

125 Summer Street, 6th Floor, Boston, MA

02110

(Address of Principal Executive Offices)

(Zip Code)

(617) 213-1788

(Registrant’s telephone number, including area code)

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:

☐

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

☐

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

☐

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

☐

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

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

Title of each class

Trading Symbol

Name of each exchange on which registered

Series A common stock, par value $0.001 per share

KVYO

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 ☐

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. ☐

Item 2.02 - Results of Operations and Financial Condition

On August 5, 2026, Klaviyo, Inc. (the "Company") issued a press release announcing financial results for the second quarter ended June 30, 2026. A copy of the release is furnished with this report as Exhibit 99.1.

The information in this Current Report on Form 8-K, including Exhibit 99.1 attached hereto, is intended to be furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly set forth by specific reference in such filing.

Item 9.01 - Financial Statements and Exhibits

(d) The following exhibits are being filed herewith:

Exhibit No.

Description

99.1

Press Release issued by Klaviyo, Inc. dated August 5, 2026

104

Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized on this 5th day of August, 2026.

KLAVIYO, INC.

By:

/s/ Amanda Whalen

Name:

Amanda Whalen

Title:

Chief Financial Officer

EX-99.1

Filename: confidentialfiscalq22026ea.htm · Sequence: 2

Document

Klaviyo Delivers Strong Q2 as Autonomous B2C CRM Strategy Gains Momentum

Second quarter revenue of $370.6 million, representing 26% year-over-year growth

Raises FY26 revenue guidance to $1.526 billion to $1.534 billion, for year-over-year growth of 24%

BOSTON, August 5, 2026 — Klaviyo (NYSE: KVYO), the autonomous B2C CRM, today announced results for its second quarter ended June 30, 2026.

“Software and the rise of AI agents are transforming consumer experience. But agents are only as good as the context behind them, and we’ve spent more than a decade building the real-time infrastructure that delivers that context at scale. The adoption we’ve seen of Composer and Customer Agent is proof that it works. Bringing on Agency’s team will accelerate what Klaviyo’s agents can do as we continue to build the autonomous B2C CRM,” said Andrew Bialecki, co-founder and co-CEO of Klaviyo.

Recent Business Highlights (all figures as of June 30, 2026):

●Three major product announcements: Released Composer; enhanced Customer Agent with Conversational Agent Builder, Custom Skills, Simulations, and API access for developers; and launched K:Social for general availability.

●Reached an agreement to acquire the team and technology of Agency, an AI-native customer success company, with co-founder and CEO Elias Torres to become Chief Product Officer following closing.

●Expanded AI ecosystem with new Anthropic Claude integration and native Figma integration, and launched as Shopify Sidekick and Stripe Projects partners.

●Added new customers Warner Music Group, the San Francisco 49ers, and Claire’s, and a regional expansion with The Body Shop.

●Total customers exceeded 205,000, and the cohort of customers generating over $50,000 of ARR increased 36% year over year to 4,477.

●Drove continued international expansion with 35% year-over-year revenue growth outside the Americas, and hosted our largest K:LDN ever.

●Platform adoption is strong with 20% of our ARR coming from customers using 3 or more products.

●Delivered NRR of 109%, up one percentage point year-over-year, driven by customer expansions, cross-sell and strong retention.

“Our autonomous B2C CRM strategy is landing as brands of all sizes around the globe consolidate onto Klaviyo. We closed the quarter at a nearly $1.5 billion annualized run rate, with Q2 revenue growth of 26% year-over-year, supported by broad-based strength across enterprise, international, and multi-product. We continued to convert that growth efficiently, with annualized revenue per employee up 28% year over year. We are once again raising our full-year revenue outlook and continuing to invest strategically in growth,” said Amanda Whalen, CFO of Klaviyo.

Second Quarter 2026 Financial Highlights:

$ in millions (except per share amounts)

Q2 FY26

Revenue $370.6

YoY Growth 26%

Gross Profit $269.1

Gross Margin 73%

Non-GAAP Gross Profit $271.9

Non-GAAP Gross Margin 73%

Operating Loss $(15.0)

Operating Margin (4)%

Non-GAAP Operating Income $50.9

Non-GAAP Operating Margin 14%

Net loss per share, basic and diluted $(0.03)

Non-GAAP net income per share, basic $0.19

Non-GAAP net income per share, diluted $0.19

Cash from Operating Activities $93.9

Free Cash Flow $82.9

Financial Outlook

$ in millions FY26-Q3 Guidance FY26 Guidance

Low High Low High

Revenue $377 $381 $1,526 $1,534

Year-over-year Growth Rate 21.5% 22.5% 24%

Non-GAAP Operating Income $40 $43 $212 $218

Non-GAAP Operating Margin 10.5% 11% 14%

Fully Diluted Shares Outstanding (Millions) 286 293

Klaviyo has not provided a reconciliation of non-GAAP operating income guidance measures to the most directly comparable GAAP measures because certain items excluded from GAAP cannot be reasonably calculated or predicted at this time. Accordingly, a reconciliation is not available without unreasonable effort. Stock-based compensation-related charges, including employer payroll tax-related items on employee stock transactions, are impacted by the timing of employee stock transactions, the future fair market value of our common stock, and our future hiring and retention needs, all of which are difficult to predict and subject to constant change.

Dilutive Securities

Klaviyo has various dilutive securities. The table below details these securities (shares in millions; rounding differences may occur):

Price as of June 30, 2026

Weighted Average Exercise Price Shares

Share price $ 15.10

Common stock outstanding as of 6/30/2026

289.0

Warrants outstanding 1.7

RSUs and PSUs outstanding 22.3

Options outstanding $ 3.05 1.4

ESPP shares outstanding 0.2

Total estimated fully diluted shares 314.6

We have excluded the impact of the Shopify investment option of 15,743,174 shares at $88.93 per share as it was out of the money as of June 30, 2026. The investment option expires on July 28, 2030.

Conference Call Information

In conjunction with this announcement, Klaviyo will host a conference call for investors at 4:30 p.m. ET (1:30 p.m. PT) today to discuss the results for its second quarter ended June 30, 2026 and its outlook for its third quarter ending September 30, 2026 and fiscal year ending December 31, 2026. The live webcast and a replay of the webcast will be available at the Investor Relations section of Klaviyo’s website: https://investors.klaviyo.com (live and replay).

Select Defined Terms

Customers. We define a customer as a distinct paid subscription to our platform. A single organization could have multiple discrete contracting divisions or subsidiaries or brands each with paid subscriptions to our platform, which would, in general, constitute multiple distinct customers. In some cases at the customer’s request, we allow subscriptions under the same parent organization to be consolidated into a single paid subscription in which case such consolidated paid subscriptions would constitute a single customer. We measure our total number of customers as a point-in-time calculation measured as of the end of a particular period. Customers do not include persons or entities that use our platform on a free trial basis.

Customers Generating Over $50,000 of ARR. We calculate our number of customers generating over $50,000 of ARR (as defined below) as those customers that have an average ARR of greater than $50,000 over the prior twelve months (or the entire duration of the customer’s paying relationship, if it is less than twelve months) as of the date of determination. We believe the number of customers generating over $50,000 of ARR is a key performance metric to help investors and others understand and evaluate our results of operations in the same manner as our management team, as it is an indicator of our ability to grow the number of customers that are exceeding this ARR threshold, both from our existing customers expanding their usage of our platform and from our sales to larger customers. We believe this is an important indicator of our ability to continue to successfully move up market.

Dollar-Based Net Revenue Retention Rate. We calculate our Dollar-Based Net Revenue Retention Rate (“NRR”) by first identifying the cohort of customers as of twelve months prior to the date of determination. We then calculate the Annualized Recurring Revenue (“ARR”) from this customer cohort as of twelve months prior to the date of determination (the “Prior Period ARR”) and the ARR from this customer cohort as of the date of determination (the “Current Period ARR”). ARR, for any date of determination, is the annualized value of existing paid subscriptions,

which we calculate by taking the amount of revenue that we expect to receive in the next monthly period for our existing paid subscriptions, assuming no changes to such subscriptions in the next month, as of that date of determination, and multiplying that amount by twelve. Current Period ARR includes any expansion, price increases, and customer subscriptions that are deactivated and subsequently reactivated during the applicable twelve-month period and reflects contraction or attrition over the last twelve months from this customer cohort, but excludes any ARR from new customers in the current period. We then divide the total Current Period ARR by the total Prior Period ARR to arrive at the point-in-time NRR. We then calculate the weighted average point-in-time NRR as of the last day of each month in the current trailing twelve-month period to arrive at the NRR, with the weightings determined by the total ARR at the end of each period. We believe NRR is a key performance metric to help investors and others understand and evaluate our results of operations in the same manner as our management team, as it represents the expansion in usage of our platform by our existing customers, which is an important measure of the health of our business and future growth prospects. We measure Dollar-Based Net Revenue Retention Rate to measure this growth.

About Klaviyo

Klaviyo (CLAY-vee-oh) is an autonomous B2C CRM that powers more valuable customer experiences. We unify a flexible, scalable data platform, intelligence that gets smarter with every interaction, and action across Marketing and Service to help businesses turn real-time customer data into personalization at scale. High-growth enterprises like Mattel, TaylorMade, Glossier, Liquid Death, Daily Harvest and more than 205,000 other paying customers leverage Klaviyo’s actionable infrastructure and our more than 350 integrations to deliver measurable outcomes through faster, higher-quality experiences.

Source: Klaviyo, Inc.

Contact

Investor Relations

Brad Sills

ir@klaviyo.com

Press

Danielle Zanatta

press@klaviyo.com

Forward Looking Statements

This press release includes certain “forward-looking statements” within the meaning of the safe harbor provisions of the Private Securities Litigation Reform Act of 1995, as amended. Other than statements of historical facts, all statements contained in this press release, including, but not limited to, statements about Klaviyo’s outlook for the third quarter of fiscal year 2026 ending September 30, 2026 and the full fiscal year ending December 31, 2026, and Klaviyo’s expectations regarding possible or assumed business strategies, potential growth and innovation opportunities, new products, potential market opportunities, use of artificial intelligence and machine learning, and

other similar matters, are forward-looking statements. Words such as “aim,” “anticipate,” “believe,” “contemplate,” “continue,” “could,” “estimate,” “expect,” “future,” “going to,” “guidance,” “intend,” “keep,” “may,” “opportunity,” “outlook,” “plan,” “potential,” “predict,” “project,” “shall,” “should,” “strategy,” “target,” “will,” “would,” or words of similar meaning or similar references to future periods may identify these forward-looking statements, although not all forward-looking statements contain these identifying words.

Forward-looking statements reflect management’s beliefs, expectations and assumptions about future events as of the date hereof, which are inherently subject to uncertainties, risks and changes in circumstances that are difficult to predict and many of which are outside of our control. These risks include, among others, the following: our ability to achieve future growth and sustain our growth rate; our ability to successfully execute our business and growth strategy, such as the success of our investment in our key growth initiatives and our ability to recognize effective areas for growth; our ability to successfully integrate with third-party platforms; our relationships with third parties, such as our marketing agency and technology partners; unfavorable conditions in our industry; our ability to attract new customers, including mid-market and enterprise customers, retain revenue from existing customers and increase sales from both new and existing customers; our ability to leverage artificial intelligence and machine learning in our products; our ability to sustain strong international growth; the success of our marketing and sales strategies; costs and expenses associated with being a public company; the impact of macroeconomic factors, including tariffs; as well as other risks and uncertainties set forth under the caption “Risk Factors” and elsewhere in our Quarterly Report on Form 10-Q for the quarter ended June 30, 2026, as filed with the Securities and Exchange Commission (the “SEC”), and the other filings and reports we make with the SEC from time to time, which may be obtained on our Investor Relations website at https://investors.klaviyo.com and on the SEC website at www.sec.gov. Moreover, we operate in a very competitive and rapidly changing environment, and new risks may emerge from time to time. It is not possible for our management to predict all risks, nor can we assess the impact of all factors on our business or the extent to which any factor(s) may cause actual results or outcomes to differ materially from those contained in any forward-looking statements we may make. In light of the risks, uncertainties, assumptions, and other factors, the future events and trends discussed in this press release may not occur and actual results could differ materially and adversely from those anticipated or implied in the forward-looking statements. Therefore, you should not rely on any of the forward-looking statements. Any forward-looking statement made by us in this press release is based only on information currently available to us and speaks only as of the date on which it is made. Other than as required by law, we assume no obligation to update any forward-looking statements contained in this press release in the event of new information, future developments or otherwise.

Statement Regarding Use of Non-GAAP Financial Measures

In addition to financial measures prepared in accordance with generally accepted accounting principles in the United States (GAAP), this press release and the accompanying tables contain non-GAAP financial measures, including non-GAAP gross profit, non-GAAP gross margin, non-GAAP operating income, non-GAAP operating expenses, non-GAAP operating margin, non-GAAP net income, non-GAAP net income per share, basic, non-GAAP net income per share, diluted, free cash flow, and free cash flow margin. The non-GAAP financial information is presented for supplemental informational purposes only and is not intended to be considered in isolation or as a substitute for, or superior to, financial information prepared and presented in accordance with GAAP. Please see the accompanying tables for reconciliations of these non-GAAP financial measures to their nearest GAAP equivalents.

Our non-GAAP gross profit, non-GAAP operating income, non-GAAP operating expenses, and non-GAAP net income exclude certain significant expenses and income that are required by GAAP to be recorded in our consolidated financial statements. These may include, among others, (i) material amortization of prepaid marketing expenses, (ii) stock-based compensation and related employer payroll taxes, and (iii) significant, one-time restructuring expenses. Our non-GAAP gross margin is calculated as non-GAAP gross profit divided by total revenue. Our non-GAAP operating margin is calculated as non-GAAP operating income divided by total revenue. Our non-GAAP net income per share, basic, is calculated as non-GAAP net income divided by weighted average shares outstanding - basic for purposes of calculating non-GAAP net income per share. Our non-GAAP net income per share, diluted, is calculated as non-GAAP net income divided by weighted average shares outstanding - diluted for purposes of calculating non-GAAP net income per share. Free cash flow is defined as cash and cash equivalents provided by or used in operating activities less purchases of property and equipment, capitalization of software development costs, and purchases of other non-current assets. Free cash flow margin is a non-GAAP financial measure that is calculated as free cash flow divided by total revenue.

Stock-based compensation expense includes the net effects of capitalization and amortization of stock-based compensation expense related to capitalized software. Stock-based compensation expense has been, and will continue to be for the foreseeable future, a significant recurring expense in our business and an important part of the compensation provided to our employees. Because of varying available valuation methodologies, subjective assumptions, and the variety of equity instruments that can impact a company’s non-cash expenses, we believe that providing non-GAAP financial measures that exclude stock-based compensation expense allows for meaningful comparisons between our operating results from period to period. When evaluating the performance of its business and making operating plans, Klaviyo does not consider these items (for example, when considering the impact of equity award grants, the company places a greater emphasis on the amount of overall stockholder dilution than the accounting charges associated with such grants). The amount of employer payroll tax-related items on employee stock transactions is dependent on restricted stock unit settlements, option exercises, related stock price, and other factors that are beyond Klaviyo’s control and that do not correlate to the operation of the business. The expense related to amortization of prepaid marketing expense of warrants issued to Shopify is dependent upon estimates and assumptions; therefore, Klaviyo believes non-GAAP measures that adjust for the amortization of prepaid marketing expense provide investors a consistent basis for comparison across accounting periods. Klaviyo believes that the economic impact of the partnership is best measured in the form of stockholder dilution and as such we have provided a reconciliation that shows the full dilutive impact of all outstanding equity instruments. Overall, Klaviyo believes it is useful to exclude these expenses in order to better understand the long-term performance of its core business and to facilitate comparison of its results period-over-period and to those of peer companies. All of these non-GAAP financial measures are important tools for financial and operational decision-making and for evaluating Klaviyo’s own operating results over different periods of time.

We believe that all these non-GAAP financial measures provide useful information about our financial performance, enhance the overall understanding of our past performance and future prospects and allow for greater transparency with respect to decision making by our management, who use these measures as important tools for financial and operational decision-making and for evaluating Klaviyo’s own operating results over different periods of time.

Investors are cautioned that there are material limitations associated with the use of non-GAAP financial measures versus their nearest GAAP equivalents. Other companies may calculate non-GAAP financial measures differently or

may use other measures to evaluate their performance, all of which could reduce the usefulness of our non-GAAP financial measures as tools for comparison. Further, stock-based compensation expense has been, and will continue to be for the foreseeable future, a significant recurring expense in Klaviyo’s business and an important part of the compensation provided to attract and retain its employees to create long-term incentive alignment with stockholders.

Klaviyo, Inc.

Condensed Consolidated Balance Sheet (Unaudited)

(In Thousands)

As of

June 30, 2026 December 31, 2025

Assets

Current assets:

Cash and cash equivalents $ 832,639 $ 1,064,875

Restricted cash 738 738

Accounts receivable, net of allowance for doubtful accounts 79,393 60,714

Deferred contract acquisition costs, current 37,768 29,634

Prepaid expenses and other current assets 57,869 50,115

Total current assets 1,008,407 1,206,076

Property and equipment, net 89,093 80,341

Right-of-use assets, net 92,793 101,126

Deferred contract acquisition costs, non-current 59,705 47,769

Prepaid marketing expense 122,600 132,849

Other non-current assets 11,571 12,443

Total assets $ 1,384,169 $ 1,580,604

Liabilities and stockholders' equity

Current liabilities:

Accounts payable

$ 38,502 $ 29,072

Accrued expenses

140,761 125,159

Lease liabilities, current

23,325 24,757

Deferred revenue

119,539 103,245

Total current liabilities 322,127 282,233

Lease liabilities, non-current 90,600 95,991

Other non-current liabilities 4,418 5,820

Total liabilities 417,145 384,044

Stockholders' equity

Preferred stock — —

Common stock - Series A

131 144

Common stock - Series B

158 160

Treasury Stock

20 —

Additional paid-in capital

1,843,479 2,073,209

Accumulated deficit

(876,764) (876,953)

Total stockholders' equity 967,024 1,196,560

Total liabilities and stockholders' equity $ 1,384,169 $ 1,580,604

Klaviyo, Inc.

Condensed Consolidated GAAP Statement of Operations (Unaudited)

(In Thousands, Except Share and Per Share Data)

Three Months Ended June 30,

2026 2025

Revenue $ 370,576 $ 293,117

Cost of revenue 101,474 71,236

Gross profit 269,102 221,881

Operating expenses:

Selling and marketing 139,300 126,632

Research and development 91,932 72,459

General and administrative 52,833 54,116

Total operating expenses 284,065 253,207

Operating loss (14,963) (31,326)

Other expense (505) (898)

Interest income 8,362 9,743

Total other income, net 7,857 8,845

Loss before income taxes (7,106) (22,481)

Provision for income taxes 1,743 1,800

Net loss $ (8,849) $ (24,281)

Net loss per share attributable to Series A and Series B common stockholders $ (0.03) $ (0.09)

Weighted average common shares outstanding 296,851,806 284,928,388

Klaviyo, Inc.

Condensed Consolidated GAAP Statement of Operations (Unaudited)

(In Thousands, Except Share and Per Share Data)

Six Months Ended June 30,

2026

2025

Revenue $ 728,581 $ 572,944

Cost of revenue 190,586 138,936

Gross profit 537,995 434,008

Operating expenses:

Selling and marketing 273,355 250,159

Research and development 171,964 141,808

General and administrative 105,894 97,117

Total operating expenses 551,213 489,084

Operating loss (13,218) (55,076)

Other expense (941) (1,562)

Interest income 17,773 19,002

Total other income, net 16,832 17,440

Income (loss) before income taxes 3,614 (37,636)

Provision for income taxes 3,425 734

Net income (loss) $ 189 $ (38,370)

Net income (loss) per share attributable to Series A and Series B common stockholders

Basic $ — $ (0.14)

Diluted $ — $ (0.14)

Weighted average common shares outstanding

Basic 300,597,853 279,674,052

Diluted 301,908,020 279,674,052

Klaviyo, Inc.

Condensed Consolidated Statement of Cash Flows (Unaudited)

(In Thousands)

Three Months Ended June 30,

2026

2025

Operating activities

Net loss $ (8,849) $ (24,281)

Adjustments to reconcile net loss to net cash provided by operating activities

Depreciation and amortization expense 7,274 3,931

Non-cash operating lease costs 7,254 6,620

Amortization of deferred contract acquisition costs 10,803 7,222

Amortization of prepaid marketing expense 13,225 13,225

Loss on disposal of property and equipment 28 —

Bad debt expense 353 (281)

Stock-based compensation expense 51,347 45,404

Changes in operating assets and liabilities:

Accounts receivable (7,444) (4,653)

Deferred contract acquisition costs (19,459) (11,627)

Prepaid expenses, prepaid taxes, and other assets (576) 1,403

Accounts payable 16,665 8,520

Accrued expenses 23,862 9,267

Deferred revenue 8,046 6,524

Operating lease liabilities (7,195) (5,899)

Other non-current liabilities (1,456) 350

Net cash provided by operating activities 93,878 55,725

Investing activities

Acquisition of property and equipment (6,556) (2,060)

Capitalization of software development costs (4,439) (5,247)

Purchase of other non-current assets (20) —

Net cash used in investing activities (11,015) (7,307)

Financing activities

Proceeds from exercise of common stock options 82 589

Proceeds from exercise of warrants 4 4

Employee taxes paid related to net share settlement of stock-based awards (2,079) (4,569)

Proceeds from employee stock purchase plan 748 2,641

Payments for share repurchases (233,569) —

Net cash used in financing activities (234,814) (1,335)

Net (decrease) increase in cash, cash equivalents, and restricted cash (151,951) 47,083

Cash, cash equivalents, and restricted cash, beginning of period 985,328 889,171

Cash, cash equivalents, and restricted cash, end of period $ 833,377 $ 936,254

Klaviyo, Inc.

Condensed Consolidated Statement of Cash Flows (Unaudited)

(In Thousands)

Six Months Ended June 30,

2026

2025

Operating activities

Net income (loss) $ 189 $ (38,370)

Adjustments to reconcile net income (loss) to net cash provided by operating activities:

Depreciation and amortization expense 13,610 8,712

Non-cash operating lease costs 14,251 12,395

Amortization of deferred contract acquisition costs 20,434 13,830

Amortization of prepaid marketing expense 26,449 26,449

Gain on derecognition of asset retirement obligation — (588)

Loss on disposal of property and equipment 156 419

Bad debt expense 989 1,536

Stock-based compensation expense 93,150 83,731

Changes in operating assets and liabilities:

Accounts receivable (19,668) (17,283)

Deferred contract acquisition costs (40,504) (22,628)

Prepaid expenses, prepaid taxes, and other assets (6,405) (4,504)

Accounts payable 12,325 9,204

Accrued expenses 11,030 (9,548)

Deferred revenue 16,294 18,214

Operating lease liabilities (12,741) (11,291)

Other non-current liabilities (1,402) (191)

Net cash provided by operating activities 128,157 70,087

Investing activities

Acquisition of property and equipment (18,222) (4,745)

Capitalization of software development costs (8,004) (10,303)

Purchase of other non-current assets (505) —

Net cash used in investing activities (26,731) (15,048)

Financing activities

Proceeds from exercise of common stock options 797 1,466

Proceeds from exercise of warrants 7 7

Employee taxes paid related to net share settlement of stock-based awards (4,879) (8,948)

Proceeds from employee stock purchase plan 3,982 6,103

Payments for share repurchases (333,569) —

Net cash used in financing activities (333,662) (1,372)

Net (decrease) increase in cash, cash equivalents, and restricted cash (232,236) 53,667

Cash, cash equivalents, and restricted cash, beginning of period 1,065,613 882,587

Cash, cash equivalents, and restricted cash, end of period $ 833,377 $ 936,254

Klaviyo, Inc.

Reconciliation of Gross Profit to Non-GAAP Gross Profit (Unaudited)

(In Thousands)

Three Months Ended June 30,

2026

2025

Gross profit $ 269,102 $ 221,881

Stock-based compensation

2,665 1,955

Employer payroll tax on employee stock transactions

103 248

Non-GAAP gross profit $ 271,870 $ 224,084

Gross margin 72.6 % 75.7 %

Non-GAAP gross margin 73.4 % 76.4 %

Klaviyo, Inc.

Reconciliation of Operating Loss to Non-GAAP Operating Income (Unaudited)

(In Thousands)

Three Months Ended June 30,

2026

2025

Operating loss $ (14,963) $ (31,326)

Stock-based compensation

51,347 45,404

Employer payroll tax on employee stock transactions

1,329 13,591

Amortization of prepaid marketing

13,225 13,225

Non-GAAP operating income $ 50,938 $ 40,894

Operating margin (4.0) % (10.7) %

Non-GAAP operating margin 13.7 % 14.0 %

Klaviyo, Inc.

Reconciliation of Net Loss to Non-GAAP Net Income (Unaudited)

(In Thousands, Except Share and Per Share Data)

Three Months Ended June 30,

2026

2025

Net loss $ (8,849) $ (24,281)

Stock-based compensation

51,347 45,404

Employer payroll tax on employee stock transactions

1,329 13,591

Amortization of prepaid marketing

13,225 13,225

Non-GAAP net income $ 57,052 $ 47,939

Non-GAAP net income per share attributable to Series A and Series B common stockholders:

Basic $ 0.19 $ 0.17

Diluted $ 0.19 $ 0.16

Shares used in non-GAAP per share calculations:

Basic 296,851,806 284,928,388

Diluted 298,014,313 304,877,359

Klaviyo, Inc.

Reconciliation of Operating Expenses to Non-GAAP Expenses (Unaudited)

(In Thousands)

Three Months Ended June 30,

2026

2025

Selling and marketing $ 139,300 $ 126,632

Stock-based compensation

(13,822) (14,329)

Employer payroll tax on employee stock transactions

(447) (898)

Amortization of prepaid marketing

(13,225) (13,225)

Non-GAAP Selling and marketing $ 111,806 $ 98,180

Research and development $ 91,932 $ 72,459

Stock-based compensation

(19,892) (18,643)

Employer payroll tax on employee stock transactions

(574) (1,109)

Non-GAAP Research and development $ 71,466 $ 52,707

General and administrative $ 52,833 $ 54,116

Stock-based compensation

(14,968) (10,477)

Employer payroll tax on employee stock transactions

(205) (11,336)

Non-GAAP General and administrative $ 37,660 $ 32,303

Total operating expenses $ 284,065 $ 253,207

Stock-based compensation

(48,682) (43,449)

Employer payroll tax on employee stock transactions

(1,226) (13,343)

Amortization of prepaid marketing

(13,225) (13,225)

Non-GAAP Total operating expenses $ 220,932 $ 183,190

Klaviyo, Inc.

Reconciliation of Operating Cash Flow to Free Cash Flow (Unaudited)

(In Thousands)

Three Months Ended June 30,

2026

2025

Cash provided by operating activities

$ 93,878 $ 55,725

Acquisition of property and equipment (6,556) (2,060)

Capitalization of software development costs

(4,439) (5,247)

Purchase of other non-current assets

(20) —

Employer taxes for executive option exercises — 10,833

Free cash flow $ 82,863 $ 59,251

Operating cash flow margin 25.3 % 19.0 %

Free cash flow margin 22.4 % 20.2 %

Klaviyo, Inc.

Reconciliation of Gross Profit to Non-GAAP Gross Profit (Unaudited)

(In Thousands)

Six Months Ended June 30,

2026

2025

Gross profit $ 537,995 $ 434,008

Stock-based compensation

4,763 3,712

Employer payroll tax on employee stock transactions

236 669

Non-GAAP gross profit $ 542,994 $ 438,389

Gross margin 73.8 % 75.8 %

Non-GAAP gross margin 74.5 % 76.5 %

Klaviyo, Inc.

Reconciliation of Operating Loss to Non-GAAP Operating Income (Unaudited)

(In Thousands)

Six Months Ended June 30,

2026

2025

Operating loss $ (13,218) $ (55,076)

Stock-based compensation

93,150 83,731

Employer payroll tax on employee stock transactions

3,125 18,201

Amortization of prepaid marketing

26,449 26,449

Non-GAAP operating income $ 109,506 $ 73,305

Operating margin (1.8) % (9.6) %

Non-GAAP operating margin 15.0 % 12.8 %

Klaviyo, Inc.

Reconciliation of Net Loss to Non-GAAP Net Income (Unaudited)

(In Thousands, Except Share and Per Share Data)

Six Months Ended June 30,

2026

2025

Net loss $ 189 $ (38,370)

Stock-based compensation

93,150 83,731

Employer payroll tax on employee stock transactions

3,125 18,201

Amortization of prepaid marketing

26,449 26,449

Non-GAAP net income $ 122,913 $ 90,011

Non-GAAP net income per share attributable to Series A and Series B common stockholders:

Basic $ 0.41 $ 0.32

Diluted $ 0.41 $ 0.29

Shares used in non-GAAP per share calculations:

Basic 300,597,853 279,674,052

Diluted 301,908,020 305,291,843

Klaviyo, Inc.

Reconciliation of Operating Expenses to Non-GAAP Expenses (Unaudited)

(In Thousands)

Six Months Ended June 30,

2026

2025

Selling and marketing $ 273,355 $ 250,159

Stock-based compensation

(24,342) (26,426)

Employer payroll tax on employee stock transactions

(1,018) (2,250)

Amortization of prepaid marketing

(26,449) (26,449)

Non-GAAP Selling and marketing $ 221,546 $ 195,034

Research and development $ 171,964 $ 141,808

Stock-based compensation

(36,877) (34,831)

Employer payroll tax on employee stock transactions

(1,339) (3,225)

Non-GAAP Research and development $ 133,748 $ 103,752

General and administrative $ 105,894 $ 97,117

Stock-based compensation

(27,168) (18,762)

Employer payroll tax on employee stock transactions

(532) (12,057)

Non-GAAP General and administrative $ 78,194 $ 66,298

Total operating expenses $ 551,213 $ 489,084

Stock-based compensation

(88,387) (80,019)

Employer payroll tax on employee stock transactions

(2,889) (17,532)

Amortization of prepaid marketing

(26,449) (26,449)

Non-GAAP Total operating expenses $ 433,488 $ 365,084

Klaviyo, Inc.

Reconciliation of Operating Cash Flow to Free Cash Flow (Unaudited)

(In Thousands)

Six Months Ended June 30,

2026

2025

Cash provided by operating activities

$ 128,157 $ 70,087

Acquisition of property and equipment (18,222) (4,745)

Capitalization of software development costs

(8,004) (10,303)

Purchase of other non-current assets

(505) —

Employer taxes for executive option exercises — 10,833

Free cash flow $ 101,426 $ 65,872

Operating cash flow margin 17.6 % 12.2 %

Free cash flow margin 13.9 % 11.5 %

XML — IDEA: XBRL DOCUMENT

XML

Filename: R1.htm · Sequence: 7

v3.26.1

Cover

Aug. 05, 2026

Cover [Abstract]

Document Type

8-K

Document Period End Date

Aug. 05, 2026

Entity Registrant Name

Klaviyo, Inc.

Entity Incorporation, State or Country Code

Entity File Number

001-41806

Entity Tax Identification Number

46-0989964

Entity Address, Address Line One

125 Summer Street

Entity Address, Address Line Two

6th Floor

Entity Address, City or Town

Boston

Entity Address, State or Province

Entity Address, Postal Zip Code

02110

City Area Code

617

Local Phone Number

213-1788

Written Communications

false

Soliciting Material

false

Pre-commencement Tender Offer

false

Pre-commencement Issuer Tender Offer

false

Title of 12(b) Security

Series A common stock, par value $0.001 per share

Trading Symbol

KVYO

Security Exchange Name

NYSE

Entity Emerging Growth Company

false

Amendment Flag

false

Entity Central Index Key

0001835830

- Definition

Boolean flag that is true when the XBRL content amends previously-filed or accepted submission.

+ References

No definition available.

+ Details

Name:

dei_AmendmentFlag

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

Period Type:

duration

- Definition

Area code of city

+ References

No definition available.

+ Details

Name:

dei_CityAreaCode

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

Cover page.

+ References

No definition available.

+ Details

Name:

dei_CoverAbstract

Namespace Prefix:

dei_

Data Type:

xbrli:stringItemType

Balance Type:

Period Type:

duration

- Definition

For the EDGAR submission types of Form 8-K: the date of the report, the date of the earliest event reported; for the EDGAR submission types of Form N-1A: the filing date; for all other submission types: the end of the reporting or transition period. The format of the date is YYYY-MM-DD.

+ References

No definition available.

+ Details

Name:

dei_DocumentPeriodEndDate

Namespace Prefix:

dei_

Data Type:

xbrli:dateItemType

Balance Type:

Period Type:

duration

- Definition

The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'.

+ References

No definition available.

+ Details

Name:

dei_DocumentType

Namespace Prefix:

dei_

Data Type:

dei:submissionTypeItemType

Balance Type:

Period Type:

duration

- Definition

Address Line 1 such as Attn, Building Name, Street Name

+ References

No definition available.

+ Details

Name:

dei_EntityAddressAddressLine1

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

Address Line 2 such as Street or Suite number

+ References

No definition available.

+ Details

Name:

dei_EntityAddressAddressLine2

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

Name of the City or Town

+ References

No definition available.

+ Details

Name:

dei_EntityAddressCityOrTown

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

Code for the postal or zip code

+ References

No definition available.

+ Details

Name:

dei_EntityAddressPostalZipCode

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

Name of the state or province.

+ References

No definition available.

+ Details

Name:

dei_EntityAddressStateOrProvince

Namespace Prefix:

dei_

Data Type:

dei:stateOrProvinceItemType

Balance Type:

Period Type:

duration

- Definition

A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.

+ References

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

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b-2

+ Details

Name:

dei_EntityCentralIndexKey

Namespace Prefix:

dei_

Data Type:

dei:centralIndexKeyItemType

Balance Type:

Period Type:

duration

- Definition

Indicate if registrant meets the emerging growth company criteria.

+ References

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

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b-2

+ Details

Name:

dei_EntityEmergingGrowthCompany

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

Period Type:

duration

- Definition

Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen.

+ References

No definition available.

+ Details

Name:

dei_EntityFileNumber

Namespace Prefix:

dei_

Data Type:

dei:fileNumberItemType

Balance Type:

Period Type:

duration

- Definition

Two-character EDGAR code representing the state or country of incorporation.

+ References

No definition available.

+ Details

Name:

dei_EntityIncorporationStateCountryCode

Namespace Prefix:

dei_

Data Type:

dei:edgarStateCountryItemType

Balance Type:

Period Type:

duration

- Definition

The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.

+ References

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

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b-2

+ Details

Name:

dei_EntityRegistrantName

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS.

+ References

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

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b-2

+ Details

Name:

dei_EntityTaxIdentificationNumber

Namespace Prefix:

dei_

Data Type:

dei:employerIdItemType

Balance Type:

Period Type:

duration

- Definition

Local phone number for entity.

+ References

No definition available.

+ Details

Name:

dei_LocalPhoneNumber

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act.

+ References

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

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 13e

-Subsection 4c

+ Details

Name:

dei_PreCommencementIssuerTenderOffer

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

Period Type:

duration

- Definition

Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act.

+ References

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

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 14d

-Subsection 2b

+ Details

Name:

dei_PreCommencementTenderOffer

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

Period Type:

duration

- Definition

Title of a 12(b) registered security.

+ References

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

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b

+ Details

Name:

dei_Security12bTitle

Namespace Prefix:

dei_

Data Type:

dei:securityTitleItemType

Balance Type:

Period Type:

duration

- Definition

Name of the Exchange on which a security is registered.

+ References

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

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection d1-1

+ Details

Name:

dei_SecurityExchangeName

Namespace Prefix:

dei_

Data Type:

dei:edgarExchangeCodeItemType

Balance Type:

Period Type:

duration

- Definition

Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as soliciting material pursuant to Rule 14a-12 under the Exchange Act.

+ References

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

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 14a

-Subsection 12

+ Details

Name:

dei_SolicitingMaterial

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

Period Type:

duration

- Definition

Trading symbol of an instrument as listed on an exchange.

+ References

No definition available.

+ Details

Name:

dei_TradingSymbol

Namespace Prefix:

dei_

Data Type:

dei:tradingSymbolItemType

Balance Type:

Period Type:

duration

- Definition

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

-Name Securities Act

-Number 230

-Section 425

+ Details

Name:

dei_WrittenCommunications

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

Period Type:

duration