Form 8-K

8-K — Net Power Inc.

Accession: 0001104659-26-105072

Filed: 2026-09-03

Period: 2026-08-31

CIK: 0001845437

SIC: 3620 (ELECTRICAL INDUSTRIAL APPARATUS)

Item: Entry into a Material Definitive Agreement

Item: Completion of Acquisition or Disposition of Assets

Item: Regulation FD Disclosure

Item: Financial Statements and Exhibits

Documents

8-K — tm2624794d1_8k.htm (Primary)

EX-99.1 — EXHIBIT 99.1 (tm2624794d1_ex99-1.htm)

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8-K — FORM 8-K

8-K (Primary)

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2026-08-31

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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 31, 2026

NET POWER INC.

(Exact name of registrant as specified in its charter)

Delaware

001-40503

98-1580612

(State or other jurisdiction of incorporation)

(Commission File Number)

(IRS Employer Identification No.)

11700 Katy Freeway, Suite 700

Houston, Texas 77079

(Address of principal executive offices, including

zip code)

(888) 323-6797

(Registrant’s telephone number, including

area code)

Not Applicable

(Former name or former address, if changed since

last report)

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(s)

Name of each exchange on which

registered

Class A Common Stock, par value $0.0001 per share

NPWR

The New York Stock Exchange

Warrants, each exercisable for one share of Class A Common Stock at a price of $11.50 per share

NPWR-WT

The 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 x

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

1.01 Entry into a Material Definitive Agreement.

On August 31, 2026 (the “Closing Date”),

Net Power, LLC, a Delaware limited liability company (the “Purchaser”) and an indirect subsidiary of NET Power Inc. (the “Company”),

and EMPower USA, LLC, a Texas limited liability company (“EMPower”), entered into, and simultaneously closed the transaction

contemplated by, an Assignment and Assumption Agreement (the “Assignment Agreement”).

Assignment Agreement

Under the Assignment Agreement, the Purchaser

acquired EMPower’s rights, and assumed EMPower’s commitments arising on and after the Closing Date, as “Owner”

under that certain Engineering, Procurement and Construction Agreement dated December 15, 2025 between EMPower and Saulsbury Industries,

Inc. (“Saulsbury”), as amended on March 6, 2026, May 13, 2026 and June 30, 2026 (the “EPC Agreement”), together

with specified owner flow-down rights and benefits under the equipment supply contract dated December 15, 2025 between Saulsbury and Wärtsilä

North America, Inc. (“Wärtsilä”), as amended on March 6, 2026 and June 30, 2026 (the “Equipment Supply Agreement”).

The EPC Agreement provides for the engineering, procurement, and construction of an approximately 123-megawatt reciprocating-engine natural-gas

power generation facility (the “Facility”). The Company refers to the acquisition of EMPower’s position under the EPC

Agreement and the related rights described below as the “Transaction.”

Consideration.

The consideration for the Transaction consisted of (i) a premium of $40.0 million, of which $20.0 million had been funded by the Purchaser

as deposits before the Closing Date, (ii) reimbursement of $18,947,272.70 of amounts previously paid by EMPower under the EPC Agreement,

and (iii) the assumption of the commitments described below. The Purchaser paid the remaining $38,947,272.70 in cash on the Closing Date,

bringing aggregate cash consideration paid to EMPower, including the deposits, to $58,947,272.70.

Assigned

interests. The assigned interests consist of EMPower’s right, title and interest in the EPC Agreement, including the

right to Saulsbury’s performance; the owner flow-down benefits, notices, warranties, remedies and step-in rights under the Equipment

Supply Agreement; all warranties, guaranties, indemnities and rights to liquidated damages; and the project information, drawings, specifications,

procurement records and other records delivered at closing. EMPower retained its rights to the consideration described above and, except

as expressly provided, claims arising out of pre-closing conduct.

The Transaction transferred contractual rights.

It did not transfer title to the engine-generator sets or other equipment, any interest in real property, any employees, or any operating

business.

Assumed

commitments. Effective on the Closing Date, the Purchaser assumed EMPower’s commitments under the EPC Agreement and the

commitments associated with the assigned flow-down rights, in each case to the extent arising or accruing on or after the Closing Date.

These include the milestone and progress payments under the EPC Agreement coming due on or after the Closing Date, including the payments

due upon issuance of the full notice to proceed, and the costs and obligations of relocating and adapting the project, including engineering

modifications, site-specific redesign, permitting, transportation, installation, standby, suspension, cancellation, mobilization, demobilization,

commissioning, indemnification and change orders. EMPower retained the excluded liabilities specified in the Assignment Agreement, which

consist principally of obligations that arose or accrued before the Closing Date.

The total contract price under the EPC Agreement

is $196,711,035.70, of which $18,947,272.70 was paid by EMPower before the Closing Date and reimbursed by the Purchaser, as described

above. The payment commitments assumed by the Purchaser were therefore approximately $177.8 million. On the Closing Date, the Purchaser

paid $58,633,890.82 of that amount to Saulsbury in satisfaction of the milestone payment for the Wärtsilä engine-generator sets

and major auxiliaries, which was due on that date, leaving remaining payment commitments under the EPC Agreement of approximately $119.1

million. Of that amount, $10,153,524.85 is payable on issuance of the full notice to proceed (the “Mobilization Payment”),

which under the Consent described below is due on or before October 15, 2026. These amounts are stated before any increase in compensation

agreed under the change order described below and before amounts payable under the price escalation provision described below.

Indemnification.

The Assignment Agreement contains customary mutual indemnification provisions, including for breaches of the parties’ representations,

warranties, and covenants, subject to customary thresholds, caps, and exceptions.

Consents to Assignment

Saulsbury consented to the assignment and to the

substitution of the Purchaser for EMPower as Owner under the EPC Agreement, effective on the Closing Date, pursuant to a Consent to Assignment

and Acknowledgment (the “Consent”), and Wärtsilä acknowledged the assignment in a separate acknowledgment. As part

of the Consent, Saulsbury agreed to the relocation of the project from its original site in Ector County, Texas to the Purchaser’s

replacement site.

Effective on the Closing Date, the definition

of Owner in the Equipment Supply Agreement was amended to mean the Purchaser, and Wärtsilä confirmed that the Purchaser may

enforce the provisions of that agreement that expressly benefit the Owner as an intended third-party beneficiary. Wärtsilä also

consented to assignment of the Equipment Supply Agreement to the Purchaser and to any financing party and confirmed that the parent company

guaranty furnished under that agreement remains in full force and effect. Wärtsilä expressly reserved its position on the relocation

of the project, which the parties expect to address in a relocation change order under, or as an amendment to, the Equipment Supply Agreement.

Saulsbury remains the contractor under the EPC Agreement and remains the buyer under the Equipment Supply Agreement.

Saulsbury also agreed to extend the deadline for

the Owner to deliver the full notice to proceed and the Mobilization Payment from August 31, 2026 to October 15, 2026. The extension does

not apply to the milestone payment for the Wärtsilä engine-generator sets and major auxiliaries, which the Purchaser paid on

the Closing Date as described above. The failure to issue the full notice to proceed by that deadline does not, in itself, constitute

a default by the Owner under the EPC Agreement.

Post-closing

change order. The Purchaser and Saulsbury agreed to negotiate in good faith a change order documenting the relocation, resumption

and sequencing of the work and a revised project schedule. Any increase in compensation arising from those matters is subject to a negotiated

cap; the cap does not limit increases attributable to changes requested by the Purchaser or to other specified exceptions. The change

order has not been executed as of the date of this report, and the revised project schedule, which will be established in that change

order, has not been agreed. If the change order is not executed within 30 days after the Closing Date, the Purchaser may elect, by notice

delivered within the following 10 days, either to continue the work pending execution of the change order or to terminate the EPC Agreement,

in which case Saulsbury’s entitlement to payment on termination, consisting of compensation owed and cancellation expenses, is subject

to a negotiated cap.

Suspension

of the work. Work under the EPC Agreement has been suspended since July 1, 2026. The Purchaser bears specified suspension,

standby, preservation, and storage charges arising from the suspension, subject to negotiated caps, and pays a monthly preservation and

storage charge until the full notice to proceed or a limited notice to proceed is delivered. Work is expected to resume following delivery

of the full notice to proceed and payment of the Mobilization Payment.

Equipment

funding and title. Title to equipment supplied under the Equipment Supply Agreement passes to the Purchaser on the later of

delivery to the Facility and payment of the corresponding milestone payment. To secure amounts funded by the Purchaser before title passes,

including the milestone payment made on the Closing Date, Saulsbury granted the Purchaser a first-priority security interest in that equipment

and the identifiable proceeds, subject to conforming arrangements with Saulsbury’s existing lender.

EPC Agreement

Scope

of work. Under the EPC Agreement, Saulsbury is responsible, on a turnkey basis, for the engineering, procurement, construction,

pre-commissioning, commissioning, start-up and testing of the Facility. The scope includes the supply and integration of ten Wärtsilä

20V31SG-B engine-generator sets, together with balance-of-plant systems, civil works, piping, electrical and control systems, and the

project substation. The Owner is responsible for the specified permits, site access, and other items set out in the EPC Agreement.

Contract

price and payment. Total compensation payable to Saulsbury under the EPC Agreement, as amended, is $196,711,035.70, comprising

approximately $99.9 million attributable to the Wärtsilä equipment and services and approximately $96.8 million for Saulsbury’s

supply and labor. Payments are made on a milestone basis, with 10% retainage on Saulsbury’s scope (other than the payment for the

performance and payment bond) and no retainage on payments for Wärtsilä equipment. Notwithstanding the turnkey structure, the

Owner is obligated to pay for increases in labor rates and material prices occurring after execution, and the contractor may seek schedule

relief for material shortages or delays in availability.

Completion

and delay liquidated damages. The EPC Agreement provides for a guaranteed substantial completion date, subject to adjustment

by change order, and requires final completion within 60 days after substantial completion. Delay liquidated damages are payable for contractor-caused

delays beyond the guaranteed date at escalating daily rates, subject to an aggregate cap.

Performance

guarantees. Applicable performance guarantees are provided under the Equipment Supply Agreement and include a plant net electrical

output of 122,466 kW and a gross heat rate of 7,199 Btu/kWh on a lower heating value basis, with minimum acceptance criteria of 97% of

the guaranteed output and 103% of the guaranteed heat rate. Performance liquidated damages are subject to a cap under the Equipment Supply

Agreement. The equipment must be installed within 90 days of the last delivery to the site; failure to do so results in a waiver of the

performance guarantees and related liquidated damages.

Change

orders. Saulsbury may obtain change order relief, including increases in compensation and extensions of the guaranteed dates,

on the occurrence of specified events, including force majeure, an Owner-ordered suspension, changes in applicable law, acts or omissions

of the Owner, pre-existing hazardous substances or unforeseen subsurface conditions, and specified events affecting Wärtsilä

as the main subcontractor.

Other

provisions. The EPC Agreement includes termination provisions, including the Owner’s right to terminate for convenience,

and representations and warranties customary in agreements of this type.

Funding of assumed commitments

The Purchaser paid $97,581,163.52 in cash on the

Closing Date from cash on hand, consisting of the $38,947,272.70 of consideration paid to EMPower under the Assignment Agreement for the

Transaction and the $58,633,890.82 milestone payment paid to Saulsbury under the EPC Agreement, in each case described above. The Company

expects to fund the Mobilization Payment and the Purchaser’s other assumed commitments from cash on hand and from equipment or project-level

financing, customer funding, or partner capital. Other than the cost reimbursement arrangement with a prospective customer previously

announced on August 24, 2026, which is subject to approval procedures, exclusions and an aggregate cap, no such financing, customer funding

or partner capital has been committed, and no assurance can be given that any of it will be obtained on acceptable terms or at all. The

Company has not made a final investment decision with respect to the Facility.

The foregoing descriptions of the Assignment Agreement,

the Consent, the EPC Agreement and the Equipment Supply Agreement do not purport to be complete and are qualified in their entirety by

reference to the full text of those agreements, copies of which will be filed as exhibits to the Company’s Quarterly Report on Form

10-Q for the quarter ending September 30, 2026.

Item

2.01 Completion of Acquisition or Disposition of Assets.

On the Closing Date, the conditions to the effectiveness

of the assignment under the Assignment Agreement were satisfied, and the Purchaser completed the Transaction. The information set forth

under Item 1.01 of this Current Report on Form 8-K is incorporated into this Item 2.01 by reference.

The assets acquired consist of contractual rights,

as described under Item 1.01. The Company has determined that the assets acquired do not constitute a business within the meaning of Rule

11-01(d) of Regulation S-X. The Purchaser funded the cash consideration from cash on hand.

Other than under the agreements described above

and the transactions contemplated by them, there is no material relationship between EMPower, Saulsbury or Wärtsilä, on the

one hand, and the Company or any of its affiliates, any director or officer of the Company, or any associate of any such director or officer,

on the other hand.

The Company intends to deploy the acquired position

at its Project Permian site in West Texas. Deployment remains subject to the change order under the EPC Agreement and the relocation change

order under the Equipment Supply Agreement described under Item 1.01, to the issuance of the full notice to proceed and the making of

the Mobilization Payment, to timely issuance of the air permit and other permits, to site access, interconnection and gas supply, to engineering

and commercial considerations, to the Company’s ability to fund the assumed payment commitments, and to other project development

risks. The Company has not entered into a power purchase agreement or energy services agreement for the Facility’s output.

Item

7.01 Regulation FD Disclosure.

On September 3, 2026, the Company issued a press

release announcing the closing of the Transaction. A copy of the press release is furnished as Exhibit 99.1 to this Current Report on

Form 8-K.

The information in this Item 7.01, including Exhibit

99.1, is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934,

as amended, nor shall it be deemed incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Securities

Exchange Act of 1934, as amended, except as expressly set forth by specific reference in such a filing.

Item

9.01 Financial Statements and Exhibits.

(a)

Financial statements of businesses or funds acquired. Not applicable. As described under Item 2.01, the assets acquired do

not constitute a business within the meaning of Rule 11-01(d) of Regulation S-X, and accordingly no financial statements are required

under Rule 3-05 of Regulation S-X.

(b)

Pro forma financial information. Not applicable, for the reason stated in paragraph (a) above.

(d) Exhibits.

Exhibit No.

Description

99.1

Press Release of NET Power Inc., dated September 3, 2026 (furnished pursuant to Item 7.01).

104

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

Cautionary Note Regarding Forward-Looking Statements

This Current Report on Form 8-K contains forward-looking

statements within the meaning of Section 27A of the Securities Act of 1933, as amended, Section 21E of the Securities Exchange Act of

1934, as amended, and the Private Securities Litigation Reform Act of 1995. Forward-looking statements include all statements that are

not historical facts, including statements regarding the intended deployment of the acquired position; the negotiation, execution and

effect of the change order under the EPC Agreement and the relocation change order under the Equipment Supply Agreement; the issuance

of the full notice to proceed and the funding of the associated Mobilization Payment; the resumption of work and the determination and

payment of suspension-related amounts; the expected capacity, cost and schedule of the Facility; the Company’s funding of its assumed

commitments; and the Company’s ability to obtain offtake, permits, site access, interconnection, gas supply and financing. Words

such as anticipates, believes, expects, intends, plans, seeks, estimates, targets, projects and similar expressions identify forward-looking

statements, although not all forward-looking statements contain those words.

Forward-looking statements are based on management’s

current expectations and assumptions and are subject to risks, uncertainties and changes in circumstances that are difficult to predict

and many of which are outside the Company’s control. Actual results may differ materially. These risks include those associated

with the failure to agree the change order or the relocation change order on acceptable terms or at all, and the exercise of the Company’s

election to terminate the EPC Agreement; the failure to lift the suspension or to resume work on the expected schedule; that the Company

assumes or incurs costs and obligations exceeding current estimates, including suspension, preservation, storage and remobilization amounts,

force majeure and vendor claims, price escalation and customs duties; that equipment is delayed, unavailable, unsuitable for the intended

project or not deployed; the failure to deliver the full notice to proceed and the Mobilization Payment by October 15, 2026, in which

case the EPC Agreement may be terminated, the consideration paid to EMPower would not be refundable, and the Company may not recover some

or all of the amounts paid toward the Wärtsilä equipment; contractor and supplier performance, including Wärtsilä’s

reservation of its position as to the relocation; the Company’s ability to fund the assumed payment commitments and the absence

of any committed equipment or project-level financing, customer funding or partner capital; that expected cost reimbursement is unavailable,

delayed, disputed, subject to exclusions or limited by an applicable cap; that a prospective customer does not enter into an energy services

agreement or commit to purchase power; risks relating to grid interconnection, including the timing and outcome of the large-load interconnection

processes of the Electric Reliability Council of Texas; the capital-intensive nature of the Company’s business model, which will

likely require it to raise additional capital; the possibility that the Company commits substantial capital before binding offtake, site

control or financing arrangements are in place and does not recover some or all of that capital; the absence of a final investment decision;

the outcome of pending litigation; and the risks described under Item 1A, Risk Factors, in the Company’s Annual Report on Form 10-K

for the year ended December 31, 2025 and in its subsequent Quarterly Reports on Form 10-Q, each as filed with the Securities and Exchange

Commission.

Forward-looking statements speak only as of the

date of this report. The Company undertakes no obligation to update or revise any forward-looking statement, whether as a result of new

information, future events or otherwise, except as required by law.

SIGNATURE

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 hereunto duly authorized.

Dated: September 3, 2026

NET POWER INC.

By:

/s/ Daniel J. Rice IV

Name:

Daniel J. Rice IV

Title:

Chief Executive Officer

EX-99.1 — EXHIBIT 99.1

EX-99.1

Filename: tm2624794d1_ex99-1.htm · Sequence: 2

Exhibit 99.1

Net Power Closes Acquisition of EMPower’s

Position Under EPC

Agreement for 123 MW of Power Generation

Saulsbury

continues as EPC contractor; Wärtsilä to supply ten reciprocating engine-generator sets totaling 123 MW

HOUSTON, TX—(BUSINESS WIRE)—September

3, 2026--Net Power Inc. (NYSE: NPWR) (“Net Power”) today announced that it has closed its previously announced acquisition

of the rights to 123 megawatts (MW) of new natural gas power generation equipment. The transaction closes out the deposit and exclusivity

agreement Net Power announced on August 24, 2026, and brings Net Power’s total potential power generation capacity to nearly 200

MW for the first phase of Project Permian, its inaugural powered land project in West Texas.

August 31, 2026, Net Power acquired from EMPower USA, LLC (“EMPower”), a power infrastructure developer, the contractual rights

and assumed the post-closing commitments under an agreement with Saulsbury Industries, Inc. (“Saulsbury”) for the engineering,

procurement, and construction (“EPC”) of an approximately 123 MW reciprocating-engine natural gas power generation facility.

Saulsbury consented to the transfer of the agreement to Net Power and to the planned relocation of the facility to Project Permian. The

acquired position also includes specified rights and benefits under the related equipment-supply agreement for the facility’s ten

engine-generator sets, to be supplied by Wärtsilä North America, Inc. (“Wärtsilä”).

“The Wärtsilä reciprocating engines

were selected for characteristics well-suited to Net Power’s powered land strategy,” explained Marc Horstman, President &

Chief Operating Officer of Net Power. “The units are designed for fast-start operation and can ramp output up and down to follow

variable load. The ten-unit modular configuration also allows individual engines to be serviced without taking the full facility offline,

supporting high overall plant availability. Saulsbury brings a track record of EPC execution for gas-fired power and energy infrastructure

across Texas and will serve as turnkey EPC contractor for the engineering, procurement, construction, commissioning, and start-up of the

facility.”

Danny

Rice, Chief Executive Officer of Net Power, added, “We’re pleased to close this important transaction to advance Project Permian.

In eighteen days, we identified this equipment, secured it with appropriate protections, and closed the transaction. That speed is a testament

to our team’s ability to move quickly, and it underscores why agility and speed matter so much in a market that urgently needs firm,

reliable power identified and deployed as fast as possible. Thank you to the EMPower, Saulsbury, and Wärtsilä teams whose

professionalism and speed made this possible.”

About Net Power

Net

Power Inc. (NYSE: NPWR) (“Net Power” or the “Company”) is an energy technology and infrastructure company

developing power generation projects to meet the rapidly growing demand for reliable, scalable power. The Company’s near-term focus

is on delivering natural gas power generation, with projects designed to accommodate carbon capture in later phases.

Cautionary Note Regarding Forward-Looking Statements

Certain statements in this release may constitute

“forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933, Section 21E of the Securities

Exchange Act of 1934 and the Private Securities Litigation Reform Act of 1995, each as amended. Forward-looking statements provide current

expectations of future events and include any statement that does not directly relate to any historical or current fact. Words such as

“anticipates,” “believes,” “expects,” “intends,” “plans,” “potential,”

“projects,” “targets,” or other similar expressions may identify such forward-looking statements. Forward-looking

statements may relate to the acquired contractual and equipment positions; the availability, timing, transfer, financing, deployment and

advantages of power generation equipment; the amount of generation capacity that may become available to the Company; the expected benefits

of the transaction; development and financing of the Company’s power generation projects; and the Company’s business strategies,

capital requirements, potential growth opportunities and expectations for future performance (financial or otherwise). Forward-looking

statements are based on current expectations, estimates, projections, targets, opinions and/or beliefs of the Company, and such statements

involve known and unknown risks, uncertainties and other factors. Actual results may differ materially from those discussed in forward-looking

statements as a result of factors, risks and uncertainties over which Net Power has no control. These factors, risks and uncertainties

include, but are not limited to, the failure to agree change orders with the contractor or the equipment supplier on acceptable terms

or at all; the failure to resume work on the expected schedule; that the Company does not issue the full notice to proceed or fund the

associated mobilization payment, in which case the EPC agreement may be terminated and amounts previously paid may not be recovered; that

the Company assumes or incurs costs and obligations exceeding current estimates; that equipment is delayed, unavailable, unsuitable for

an intended project or not deployed; that a prospective customer does not enter into an energy services agreement or commit to purchase

power; that reimbursement is unavailable, delayed, disputed, subject to exclusions or limited by an applicable cap; risks relating to

the uncertainty of the projected financial information with respect to the Company and risks related to the Company’s ability to

meet its projections; the capital-intensive nature of the Company’s business model, which will likely require Net Power to raise

additional capital in the future; the Company’s ability to negotiate and enter into binding power offtake agreements on acceptable

terms and on a timeline that supports a final investment decision for Project Permian; risks related to grid interconnection, including

the timing and outcome of the large-load interconnection processes of the Electric Reliability Council of Texas and any related verification,

audit, or other regulatory or legislative processes; the availability, cost, and delivery timing of gas turbines, reciprocating engines,

and related long-lead equipment; the impact of tariffs, trade barriers, export controls, and sanctions on equipment costs and supply timelines;

the development of competing energy technologies, including battery storage, nuclear, and other generation resources; changes in, or the

elimination of, governmental incentives and tax credits supporting carbon capture, including the credit available under Section 45Q of

the Internal Revenue Code, and restrictions on the value, transferability, and monetization of such credits, and the availability of arrangements

for the sale, transportation, sequestration, or other disposition of captured CO₂; risks associated with developing power generation

projects for co-located load; risks relating to the Company’s access to capital, potential dilution to existing stockholders, and

the continued listing of its securities on the New York Stock Exchange; the availability of project-level financing, equipment financing,

additional equity or equity-linked capital, partner capital, or other financing sources on acceptable terms or at all; the timing and

amount of any equipment-financing proceeds, including the possibility that such proceeds may not be sufficient to refinance amounts previously

funded by Net Power for the acquisition; uncertainty regarding the current and future market for natural gas-generated power, with or

without carbon capture; the Company’s ability to license third-party technology; the ability of the Company to effectively secure

licenses for third-party PCC technology and to integrate such technology in its projects; barriers the Company may face in its attempts

to deploy and commercialize its technology; the Company’s ability to adequately control or accurately predict the costs associated

with its projects; barriers that the Company may face in its attempts to deploy projects; the complexity of the machinery the Company

relies on for its operations and development; potential changes and/or delays in site selection and construction that result from regulatory,

logistical, and financing challenges; the Company’s ability to establish and maintain supply relationships; risks related to strategic

investors and partners, including potential conflicts of interests between the Company and such investors and partners; the Company’s

ability to successfully commercialize its operations; the availability and cost of technological components and raw materials for its

projects; the impact of potential delays in discovering manufacturing and construction issues; the ability of Net Power’s commercial

plants to efficiently provide net power output; the impact of public perception of fossil fuel-derived energy on the Company’s business;

any political or other disruptions in gas producing nations; the Company’s ability to protect its intellectual property and the

intellectual property it licenses; the possibility that the Company commits substantial capital to power generation equipment before binding

power offtake, site-control or financing arrangements are in place, and may not recover some or all of that capital; the Company’s

ability to obtain the additional land and development rights required for the contemplated co-located configuration and broader build-out

at Project Permian; the Company’s ability to attract, retain, and motivate qualified personnel, and risks associated with workforce

reductions; the Company’s ability to realize value from the Oxy-Combustion Cycle intellectual property and its interests at the

La Porte Demonstration Facility, and the timing and cost of decommissioning that facility; risks relating to data privacy and cybersecurity,

including the potential for cyberattacks or security incidents that could disrupt our or our service providers’ operations; current

and potential litigation that has been and may be instituted against the Company; and other risks and uncertainties described under the

headings “Risk Factors” and “Cautionary Note Regarding Forward-Looking Statements” in Net Power’s Annual

Report on Form 10-K for the year ended December 31, 2025, its Quarterly Report on Form 10-Q for the quarter ended June 30, 2026 filed

with the SEC on August 13, 2026, its other quarterly reports on Form 10-Q, and in its other filings made with the SEC from time to time,

which are available via the SEC’s website at www.sec.gov. Forward-looking statements speak only as of the date they are made. Readers

are cautioned not to put undue reliance on forward-looking statements, and Net Power assumes no obligation and does not intend to update

or revise these forward-looking statements, whether as a result of new information, future events, or otherwise. Net Power does not give

any assurance that it will achieve its expectations.

Investor Relations Contact:

investors@netpower.com

Media Contact:

media@netpower.com

XML — IDEA: XBRL DOCUMENT

XML

Filename: R1.htm · Sequence: 8

v3.26.1

Cover

Aug. 31, 2026

Document Information [Line Items]

Document Type

8-K

Amendment Flag

false

Document Period End Date

Aug. 31, 2026

Entity File Number

001-40503

Entity Registrant Name

NET POWER INC.

Entity Central Index Key

0001845437

Entity Tax Identification Number

98-1580612

Entity Incorporation, State or Country Code

Entity Address, Address Line One

11700 Katy Freeway

Entity Address, Address Line Two

Suite 700

Entity Address, City or Town

Houston

Entity Address, State or Province

Entity Address, Postal Zip Code

77079

City Area Code

888

Local Phone Number

323-6797

Written Communications

false

Soliciting Material

false

Pre-commencement Tender Offer

false

Pre-commencement Issuer Tender Offer

false

Entity Emerging Growth Company

true

Elected Not To Use the Extended Transition Period

false

Class A Common Stock, par value $0.0001 per share [Member]

Document Information [Line Items]

Title of 12(b) Security

Class A Common Stock, par value $0.0001 per share

Trading Symbol

NPWR

Security Exchange Name

NYSE

Warrants, each exercisable for one share of Class A Common Stock at a price of $11.50 per share [Member]

Document Information [Line Items]

Title of 12(b) Security

Warrants, each exercisable for one share of Class A Common Stock at a price of $11.50 per share

Trading Symbol

NPWR-WT

Security Exchange Name

NYSE

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

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Area code of city

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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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.

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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'.

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No definition available.

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

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Address Line 2 such as Street or Suite number

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Name of the City or Town

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Code for the postal or zip code

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Name of the state or province.

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- Definition

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

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-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

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Indicate if registrant meets the emerging growth company criteria.

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-Section 12

-Subsection b-2

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Indicate if an emerging growth company has elected not to use the extended transition period for complying with any new or revised financial accounting standards.

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-Name Securities Act

-Number 7A

-Section B

-Subsection 2

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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.

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No definition available.

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

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- Definition

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

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-Publisher SEC

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-Number 240

-Section 12

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

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Local phone number for entity.

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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 pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act.

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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 pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act.

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Title of a 12(b) registered security.

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Name of the Exchange on which a security is registered.

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-Section 12

-Subsection d1-1

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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 soliciting material pursuant to Rule 14a-12 under the Exchange Act.

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Trading symbol of an instrument as listed on an exchange.

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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.

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-Section 425

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