# EDGAR Filing Document

**Accession Number:** 0001697500
**File Stem:** 0001193125-26-153049
**Filing Date:** 2026-4
**Character Count:** 98491
**Document Hash:** cb953cb648889cfda13eb8e9e56c5cad
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-153049.hdr.sgml**: 20260413

**ACCESSION NUMBER**: 0001193125-26-153049

**CONFORMED SUBMISSION TYPE**: S-3ASR

**PUBLIC DOCUMENT COUNT**: 15

**FILED AS OF DATE**: 20260413

**DATE AS OF CHANGE**: 20260413

**EFFECTIVENESS DATE**: 20260413

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Solaris Energy Infrastructure, Inc.
- **CENTRAL INDEX KEY:** 0001697500
- **STANDARD INDUSTRIAL CLASSIFICATION:** OIL & GAS FILED MACHINERY & EQUIPMENT [3533]
- **ORGANIZATION NAME:** 01 Energy & Transportation
- **EIN:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** S-3ASR
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-295028
- **FILM NUMBER:** 26858442

**BUSINESS ADDRESS:**
- **STREET 1:** 9651 KATY FREEWAY
- **STREET 2:** SUITE 300
- **CITY:** HOUSTON
- **STATE:** TX
- **ZIP:** 77024
- **BUSINESS PHONE:** (281)501-3070

**MAIL ADDRESS:**
- **STREET 1:** 9651 KATY FREEWAY
- **STREET 2:** SUITE 300
- **CITY:** HOUSTON
- **STATE:** TX
- **ZIP:** 77024

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Solaris Oilfield Infrastructure, Inc.
- **DATE OF NAME CHANGE:** 20170207

##### [**Table of Contents**](#toc)
**As filed with the U.S. Securities and Exchange Commission on April 13, 2026** 

**Registration No. 333-** 

**UNITED STATES** 

**SECURITIES AND EXCHANGE COMMISSION** 

**Washington, D.C. 20549** 

**FORM S-3**

**REGISTRATION STATEMENT** 

***Under***

***THE SECURITIES ACT OF 1933***

## Solaris Energy Infrastructure, Inc.
**(Exact name of registrant as specified in its charter)** 

---

| | |
|:---|:---|
| **Delaware** | **81-5223109** |
| **(State or other jurisdiction of**<br> **incorporation or organization)** | **(I.R.S. Employer**<br> **Identification Number)** |

---

**9651 Katy Freeway, Suite 300** 

**Houston, Texas 77024** 

**(281) 501-3070**

**(Address, including zip code, and telephone number, including area code, of registrant's principal executive offices)** 

**Stephen E. Tompsett** 

**Chief Financial Officer** 

**9651 Katy Freeway, Suite 300** 

**Houston, Texas 77024** 

**(281) 501-3070**

**(Name, address, including zip code, and telephone number, including area code, of agent for service)** 

***Copies to:***

**Hillary H. Holmes** 

**Gibson, Dunn & Crutcher LLP** 

**811 Main Street, Suite 3000** 

**Houston, Texas 77002** 

**(346) 718-6600**

**Approximate date of commencement of proposed sale to the public:** 

**From time to time after this registration statement becomes effective.** 

If the only securities being registered on this Form are being offered pursuant to dividend or interest reinvestment plans, please check the following box. ☐

If any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933, other than securities offered only in connection with dividend or interest reinvestment plans, check the following box: ☒

If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, please check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ☐

If this Form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ☐

If this Form is a registration statement pursuant to General Instruction I.D. or a post-effective amendment thereto that shall become effective upon filing with the Commission pursuant to Rule 462(e) under the Securities Act, check the following box. ☒

If this Form is a post-effective amendment to a registration statement filed pursuant to General Instruction I.D. filed to register additional securities or additional classes of securities pursuant to Rule 413(b) under the Securities Act, check the following box. ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of "large accelerated filer," "accelerated filer," "smaller reporting company" and "emerging growth company" in Rule 12b-2 of the Exchange Act.

---

| | | | |
|:---|:---|:---|:---|
| Large accelerated filer | ☒ | Accelerated filer | ☐ |
| Non-accelerated filer | ☐ | Smaller reporting company | ☐ |
|  |  | 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 7(a)(2)(B) of Securities Act. ☐

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##### [**Table of Contents**](#toc)
**PROSPECTUS**![LOGO](g112487g01p03.jpg)

## Solaris Energy Infrastructure, Inc.
**4,182,772 Shares of Class A Common Stock** 

The securities to be offered and sold using this prospectus includes 4,182,772 shares of Class A common stock, par value $0.01 per share (the "Class A common stock"), that may be offered and sold by the selling stockholders named in this prospectus or in any supplement to this prospectus from time to time in accordance with the provisions set forth under "Plan of Distribution."

The selling stockholders may sell the shares of Class A common stock offered by this prospectus from time to time on any exchange on which the shares of Class A common stock are listed on terms to be negotiated with buyers. They may also sell the shares of Class A common stock in private sales or through dealers or agents. The selling stockholders may sell the shares of Class A common stock at prevailing market prices or at prices negotiated with buyers. The selling stockholders will be responsible for any commissions due to brokers, dealers or agents. We will be responsible for all other offering expenses. We will not receive any of the proceeds from the sale by the selling stockholders of the shares of Class A common stock offered by this prospectus.

Our Class A common stock is traded on the New York Stock Exchange ("NYSE") and the NYSE Texas, Inc. ("NYSE Texas") under the symbol "SEI."

**You should read carefully this prospectus, the documents incorporated by reference in this prospectus and any prospectus supplement before you invest. See "[Risk Factors](#tx112487_5)" beginning on page 2 of this prospectus for information on certain risks related to the purchase of our securities.** 

**Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or determined if this prospectus is truthful or complete. Any representation to the contrary is a criminal offense.** 

**The date of this prospectus is April 13, 2026.** 

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##### [**Table of Contents**](#toc)
**TABLE OF CONTENTS** 

---

| | | |
|:---|:---|:---|
|  | **<u>Page</u>** | **<u>Page</u>** |
|  [ABOUT THIS PROSPECTUS](#tx112487_1) |  | ii |
|  [WHERE YOU CAN FIND MORE INFORMATION](#tx112487_2) |  | iii |
|  [CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING STATEMENTS](#tx112487_3) |  | iv |
|  [ABOUT SOLARIS ENERGY INFRASTRUCTURE, INC.](#tx112487_4) |  | 1 |
|  [RISK FACTORS](#tx112487_5) |  | 2 |
|  [USE OF PROCEEDS](#tx112487_6) |  | 3 |
|  [SELLING STOCKHOLDERS](#tx112487_7) |  | 10 |
|  [LEGAL MATTERS](#tx112487_8) |  | 16 |
|  [EXPERTS](#tx112487_9) |  | 16 |

---

You should rely only on the information contained in this prospectus, any prospectus supplement and the documents we have incorporated by reference herein. We and the selling stockholders have not authorized any dealer, salesperson or other person to provide you with additional or different information. If anyone provides you with different or inconsistent information, you should not rely on it. This prospectus and any prospectus supplement are not an offer to sell or the solicitation of an offer to buy any securities other than the securities to which they relate and are not an offer to sell or the solicitation of an offer to buy securities in any jurisdiction to any person to whom it is unlawful to make an offer or solicitation in that jurisdiction. You should not assume that the information contained in this prospectus is accurate as of any date other than the date on the front cover of this prospectus, or that the information contained in any document incorporated by reference is accurate as of any date other than the date of the document incorporated by reference, regardless of the time of delivery of this prospectus or any sale of a security. Our business, financial condition, results of operation and prospects may have changed since that date.

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##### [**Table of Contents**](#toc)
**ABOUT THIS PROSPECTUS** 

This prospectus is part of a registration statement that we have filed with the U.S. Securities and Exchange Commission (the "SEC") using a "shelf" registration process. Under this shelf registration process, the selling stockholders named in this prospectus or any supplement to this prospectus may, from time to time, offer and sell the Class A common stock described in this prospectus in one or more offerings. This prospectus generally describes Solaris Energy Infrastructure, Inc. and the Class A common stock that the selling stockholders may offer. Each time securities are offered by means of this prospectus, the selling stockholders are required to provide a prospectus supplement that will contain specific information about the terms of that offering. We may also authorize one or more free writing prospectuses to be provided to you that may contain material information relating to these offerings. We may also add or update in the prospectus supplement (and in any related free writing prospectus that we may authorize to be provided to you) any of the information contained in this prospectus or in the documents that have been incorporated by reference into this prospectus. Please read this prospectus, any applicable prospectus supplement and any related free writing prospectus, together with the information incorporated herein by reference as described under the heading "Where You Can Find More Information," carefully before buying any of the securities being offered.

This prospectus contains summaries of certain provisions contained in some of the documents described herein, but reference is made to the actual documents for complete information. All of the summaries are qualified in their entirety by the actual documents. Copies of some of the documents referred to herein have been filed, will be filed or are incorporated by reference as exhibits to the registration statement of which this prospectus is a part, and you may obtain copies of those documents as described below under the heading "Where You Can Find More Information."

Unless context otherwise requires, references in this prospectus to the "Company," "Solaris," "we," "our," "us" or like terms refer to Solaris Energy Infrastructure, Inc. and its subsidiaries and predecessors.

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##### [**Table of Contents**](#toc)
**WHERE YOU CAN FIND MORE INFORMATION** 

We have filed a registration statement with the SEC under the Securities Act of 1933, as amended (the "Securities Act"), that registers the offer and sale of the securities covered by this prospectus. The registration statement, including the exhibits attached thereto and incorporated by reference therein, contains additional relevant information about us. In addition, we file annual, quarterly and other reports and other information with the SEC. The SEC maintains a website that contains reports, proxy and information statements and other information regarding issuers that file electronically with the SEC. Our SEC filings are available on the SEC's website at *www.sec.gov*.

The SEC allows us to "incorporate by reference" the information we have filed with the SEC. This means that we can disclose important information to you without actually including the specific information in this prospectus by referring you to other documents filed separately with the SEC. The information incorporated by reference is an important part of this prospectus. Information that we later provide to the SEC, and which is deemed to be "filed" with the SEC, will automatically update information previously filed with the SEC, and may update or replace information in this prospectus and information previously filed with the SEC.

We incorporate by reference the documents listed below and any filings we make with the SEC under Sections 13(a), 13(c), 14, or 15(d) of the Securities Exchange Act of 1934, as amended (the "Exchange Act") (excluding information deemed to be furnished and not filed with the SEC), after the date on which the registration statement was initially filed with the SEC (including all such documents that we may file with the SEC after the date the registration statement was initially filed and prior to the effectiveness of the registration statement) until all offerings under the registration statement of which this prospectus forms a part are completed or terminated:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• our Annual Report on Form 10-K for the year ended December 31, 2025
filed on [February 27, 2026](http://www.sec.gov/Archives/edgar/data/../../../ix?doc=/Archives/edgar/data/0001697500/000162828026012501/sei-20251231.htm) (including the information specifically incorporated by reference into
our Annual Report on Form 10-K from our Definitive Proxy Statement filed on [April 1, 2026](http://www.sec.gov/Archives/edgar/data/../../../ix?doc=/Archives/edgar/data/0001697500/000114036126012799/ny20062642x1_def14a.htm));

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• our Current Reports on Form 8-K filed on [February 12, 2026](http://www.sec.gov/Archives/edgar/data/../../../ix?doc=/Archives/edgar/data/0001697500/000119312526048667/d933504d8k.htm) , [February 17, 2026](http://www.sec.gov/Archives/edgar/data/../../../ix?doc=/Archives/edgar/data/0001697500/000119312526054550/d66847d8k.htm) , [March 20, 2026](http://www.sec.gov/Archives/edgar/data/../../../ix?doc=/Archives/edgar/data/0001697500/000119312526117930/d69360d8k.htm) and [April 8, 2026](http://www.sec.gov/Archives/edgar/data/../../../ix?doc=/Archives/edgar/data/0001697500/000119312526148031/d132412d8k.htm) ; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the description of our Class A common stock contained in our Registration Statement on Form 8-A filed on [May 10, 2017](http://www.sec.gov/Archives/edgar/data/1697500/000119312517165642/d388267d8a12b.htm) , including any amendments or reports that we may file in the future for the purpose of
updating such description.

These reports contain important information about us, our financial condition and our results of operations.

We make available free of charge on or through our website, *www.solaris-energy.com*, our filings with the SEC pursuant to Section 13(a) or 15(d) of the Exchange Act as soon as reasonably practicable after we electronically file such material with, or furnish it to, the SEC. We make our website content available for information purposes only. Information contained on our website is not incorporated by reference into this prospectus and does not constitute a part of this prospectus.

You may obtain copies of any of the documents incorporated by reference in this prospectus from the SEC through the SEC's website at the address provided above. You also may request a copy of any document incorporated by reference in this prospectus (including exhibits to those documents specifically incorporated by reference in this prospectus), at no cost, by contacting us at:

**Solaris Energy Infrastructure, Inc.** 

**Attention: Investor Relations** 

**9651 Katy Freeway, Suite 300** 

**Houston, Texas 77024** 

**(281) 501-3070**

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##### [**Table of Contents**](#toc)
**CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING STATEMENTS** 

This prospectus and the documents incorporated by reference herein include "forward-looking statements" within the meaning of Section 27A of the Securities Act and Section 21E of the Exchange Act, which involve risks, uncertainties and assumptions. Statements that are predictive in nature, that depend upon or refer to future events or conditions or that include the words "believe," "expect," "anticipate," "intend," "estimate," "could," "may," "continue," "predict," "potential" and other expressions that are predictions of or indicate future events and trends and that do not relate to historical matters identify forward-looking statements. Our forward-looking statements include statements about our business strategy, our industry, our future profitability, our expected capital expenditures and the impact of such expenditures on our performance, management changes, current and potential future long-term contracts, the costs of being a publicly traded corporation, our capital programs and our future business and financial performance. In addition, our forward-looking statements address the various risks and uncertainties associated with extraordinary market environments and the expected impact on our businesses, results of operations and earnings.

A forward-looking statement may include a statement of the assumptions or bases underlying the forward-looking statement. We believe that we have chosen these assumptions or bases in good faith and that they are reasonable. You are cautioned not to place undue reliance on any forward-looking statements. You should also understand that it is not possible to predict or identify all such factors and should not consider the following list to be a complete statement of all potential risks and uncertainties. Factors that could cause our actual results to differ materially from the results contemplated by such forward-looking statements include:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the level of domestic spending and access to capital markets which we serve, namely (i) power generation and
(ii) the oil and natural gas industry;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• uncertainty regarding the future actions of oil producers, including the members of the Organization of the
Petroleum Exporting Countries (OPEC) and Russia and the actions taken to set, maintain or cut production levels;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• changes in tariffs, trade barriers, price and exchange controls and other regulatory requirements, and the impact
of such policies on us, our customers and the global economic environment, including access to resources needed for our products and services;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• customer concentration, the potential for future consolidation amongst current or potential customers and the
possibility that customers may not continue to outsource their power system needs, which could affect demand for our products and services, especially in the power generation industry;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• development of alternative power generation technologies or increased grid capacity that could reduce the demand
for our products and services;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• ability to secure customer contracts and such ability's impact on our revenue and operating results;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• developments and uncertainty in the global economy generally, and/or the energy, power and infrastructure sectors
specifically, and the resulting impacts to the demand and supply for power generation or crude oil and natural gas or volatility of the prices for such projects, including a potential increase in Venezuelan oil supply and any related impact on
global oil prices and domestic oil productions, and therefore the demand for the services we provide and the commercial opportunities available to us;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• volatility in the political, legal and regulatory environments, including the impact of a prolonged federal
government shutdown or lapse in federal appropriations that could disrupt our operations and future plans and opportunities;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• geopolitical risks, including the war between Russia and Ukraine, the Israel and Hamas conflict, continued
hostilities in the Middle East and U.S. intervention in Venezuela, which could each affect the stability and continued recovery of oil and gas markets;

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• uncertainty regarding methods by which the growing demand for power generation will be met in both the short and
long term;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the success of Stateline Power, LLC and its impact on the financial condition and results of operations of our
Solaris Power Solutions segment;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• inflationary risks, increased interest rates, central bank policy, bank failures and associated liquidity risks
and supply chain constraints, including changes in market price and availability of materials and labor;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• significant changes in the transportation industries or fluctuations in transportation costs or the availability
or reliability of transportation that service our business;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• large or multiple customer defaults, including defaults resulting from actual or potential insolvencies;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• epidemics or pandemics, including the effects of related public health concerns and the impact of continued
actions taken by governmental authorities and other third parties in response to pandemics and their impact on commodity prices, supply and demand considerations and storage capacity;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• technological advancements in well completion technologies and our ability to expand our product and service
offerings;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• competitive conditions in our industry;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• inability to fully protect our intellectual property rights;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• actions taken by our customers, competitors and third-party operators;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• changes in the availability and cost of capital;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• our ability to successfully implement our business strategy;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• increases in tax rates or the enactment of taxes that specifically impact exploration and production related
operations resulting in an increase in the amount of taxes owed by us;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the effects of existing and future laws, rulings, governmental regulations and accounting standards and
statements (or the interpretation thereof) on us and our customers;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• cyber-attacks targeting systems and infrastructure used by the power generation and oil and natural gas
industries;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the effects of pending and future litigation;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• credit markets;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• business acquisitions;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• natural or man-made disasters and other external events that may disrupt
our manufacturing operations;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• environmental and climate change regulations and policies, and the impact of such regulations and policies on us
and our customers;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the timing of regulatory proceedings and approvals, and the impact of such proceedings and approvals on us and
our customers;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• health, safety and environmental risks;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• uncertainty regarding our future operating results;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• plans, objectives, expectations and intentions that are not historical; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• other risks and uncertainties, including those described under the heading "Risk Factors" included in
our most recent Annual Report on Form 10-K filed with the SEC.

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All forward-looking statements speak only as of the date of this prospectus. You should not place undue reliance on our forward-looking statements. Although forward-looking statements reflect our good faith beliefs at the time they are made, forward-looking statements involve known and unknown risks, uncertainties and other factors, including the factors described under Item 1A, "Risk Factors" in our Annual Report on Form 10-K for the year ended December 31, 2025, this prospectus and in our other filings with the SEC, which may cause our actual results, performance or achievements to differ materially from anticipated future results, performance or achievements expressed or implied by such forward-looking statements. We undertake no obligation to publicly update or revise any forward-looking statement, whether as a result of new information, future events, changed circumstances or otherwise, unless required by law.

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**ABOUT SOLARIS ENERGY INFRASTRUCTURE, INC.** 

We provide modular and scalable equipment-based solutions for power generation, power control and distribution, and the management of raw materials in oil and natural gas well completions. Headquartered in Houston, Texas, we serve multiple U.S. end markets, including data center, energy, and other commercial and industrial sectors. We deliver these offerings through our Solaris Power Solutions and Solaris Logistics Solutions business segments.

Our principal executive offices are located at 9651 Katy Freeway, Suite 300, Houston, Texas 77024, and our telephone number is (281) 501-3070. Our website address is *www.solaris-energy.com*. The information on our website is not part of this prospectus.

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**RISK FACTORS** 

An investment in our securities involves a significant degree of risk. Before you invest in our securities, you should carefully consider those risk factors included in our most recent Annual Report on Form 10-K, any subsequently filed Quarterly Reports on Form 10-Q and any subsequently filed Current Reports on Form 8-K, each of which is incorporated herein by reference, and those risk factors that may be included in any applicable prospectus supplement, together with all of the other information included in this prospectus, any prospectus supplement and the documents we incorporate by reference, in evaluating an investment in our securities. If any of these risks were actually to occur, our business, financial condition or results of operations could be materially adversely affected. Additional risks not presently known to us or that we currently believe are immaterial may also significantly impair our business operations and financial condition. Please read "Cautionary Statement Regarding Forward-Looking Statements."

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**USE OF PROCEEDS** 

We will not receive any proceeds from the sale of the Class A common stock offered under this prospectus. Any proceeds from the sale of Class A common stock under this prospectus will be received by the selling stockholders. However, pursuant to that certain Securities Purchase Agreement, dated March 16, 2026, by and among the Company, Solaris Energy Infrastructure, LLC ("Solaris LLC"), Project G Buyer, LLC ("Project G Buyer"), Focus Genco Cayman Ltd. ("Genco"), the holders of shares of Genco (the "Sellers") and Alan Zelazo, solely in his capacity as the Sellers representative (the "Securities Purchase Agreement" and, such transaction, the "Transaction"), we will pay the expenses, other than underwriting discounts and commissions, associated with the sale of Class A common stock held by certain selling stockholders associated with the Transaction pursuant to this prospectus (such selling stockholders, the "Transaction Stockholders").

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**DESCRIPTION OF CAPITAL STOCK** 

Under our amended and restated certificate of incorporation, as amended, our authorized capital stock consists of 600,000,000 shares of Class A common stock, 180,000,000 shares of Class B common stock, $0.00 par value per share ("Class B common stock"), and 50,000,000 shares of preferred stock, $0.01 par value per share.

The following description of capital stock is based upon our amended and restated certificate of incorporation, our amended and restated bylaws, in each case, as amended, and applicable provisions of law. We have summarized certain portions of our amended and restated certificate of incorporation and amended and restated bylaws below. The summary is not complete and is subject to, and is qualified in its entirety by express reference to, the provisions of applicable law and to our amended and restated certificate of incorporation and amended and restated bylaws, which are filed as exhibits to the registration statement of which this prospectus is a part.

**Class A Common Stock** 

***Voting Rights***. Holders of shares of Class A common stock are entitled to one vote per share held of record on all matters to be voted upon by the stockholders. The holders of shares of Class A common stock do not have cumulative voting rights in the election of directors.

***Dividend Rights***. Holders of shares of our Class A common stock are entitled to ratably receive dividends when and if declared by our board of directors out of funds legally available for that purpose, subject to any statutory or contractual restrictions on the payment of dividends and to any prior rights and preferences that may be applicable to any outstanding preferred stock.

***Liquidation Rights***. Upon our liquidation, dissolution, distribution of assets or other winding up, the holders of shares of Class A common stock are entitled to receive ratably the assets available for distribution to the stockholders after payment of liabilities and the liquidation preference of any of our outstanding shares of preferred stock.

***Other Matters***. The shares of Class A common stock have no preemptive or conversion rights and are not subject to further calls or assessment by us. There are no redemption or sinking fund provisions applicable to the Class A common stock. All outstanding shares of our Class A common stock, including the Class A common stock offered in this offering, are fully paid and non-assessable.

**Class B Common Stock** 

***Generally***. Each member of Solaris LLC has received one share of Class B common stock for each unit of Solaris LLC (the "Solaris LLC Units") that it holds. Accordingly, each member of Solaris LLC has a number of votes in the Company equal to the aggregate number of Solaris LLC Units that it holds.

***Voting Rights***. Holders of shares of our Class B common stock are entitled to one vote per share held of record on all matters to be voted upon by the stockholders. Holders of shares of our Class A common stock and Class B common stock vote together as a single class on all matters presented to our stockholders for their vote or approval, except with respect to the amendment of certain provisions of our amended and restated certificate of incorporation that would alter or change the powers, preferences or special rights of the Class B common stock so as to affect them adversely, which amendments must be adopted by a majority of the votes entitled to be cast by the holders of the shares affected by the amendment, voting as a separate class, or as otherwise required by applicable law.

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***Dividend and Liquidation Rights***. Holders of our Class B common stock do not have any right to receive dividends, unless the dividend consists of shares of our Class B common stock or of rights, options, warrants or other securities convertible or exercisable into or redeemable for shares of Class B common stock paid proportionally with respect to each outstanding share of our Class B common stock, and a dividend consisting of shares of Class A common stock or of rights, options, warrants or other securities convertible or exercisable into or redeemable for shares of Class A common stock on the same terms is simultaneously paid to the holders of Class A common stock. Holders of our Class B common stock do not have any right to receive a distribution upon the Company's liquidation or winding up.

***Redemption Right***. Each member of Solaris LLC has received one share of Class B common stock for each Solaris LLC Unit that it holds. Accordingly, each member of Solaris LLC has a number of votes in the Company equal to the aggregate number of Solaris LLC Units that it holds. Pursuant to the second amended and restated limited liability company agreement of Solaris LLC, as amended from time to time, each holder of Solaris LLC Units has the right to redeem his or her Solaris LLC Units, together with an equal number of shares of Class B common stock, for shares of Class A common stock (or cash at the Company's election, subject to customary conversion rate adjustments for stock splits, stock dividends and reclassifications).

**Preferred Stock** 

Our amended and restated certificate of incorporation authorizes our board of directors, subject to any limitations prescribed by law, without further stockholder approval, to establish and to issue from time to time one or more classes or series of preferred stock, par value $0.01 per share, covering up to an aggregate of 50,000,000 shares of preferred stock. Each class or series of preferred stock will have the powers, preferences, rights, qualifications, limitations and restrictions determined by the board of directors, which may include, among others, dividend rights, liquidation preferences, voting rights, conversion rights, preemptive rights and redemption rights. Except as provided by law or in a preferred stock designation, the holders of preferred stock will not be entitled to vote at or receive notice of any meeting of stockholders.

**Anti-Takeover Effects of Provisions of Our Amended and Restated Certificate of Incorporation,** 

**Our Amended and Restated Bylaws and Delaware Law** 

Certain provisions of Delaware law and certain provisions of our amended and restated certificate of incorporation and our amended and restated bylaws described below could make it more difficult for a third party to acquire the Company by means of a tender offer, a proxy contest or otherwise, or to remove our incumbent officers and directors. These provisions may also have the effect of preventing changes in our management. It is possible that these provisions could make it more difficult to accomplish or could deter transactions that stockholders may otherwise consider to be in their best interests or in our best interests, including transactions that might result in a premium over the market price for our shares.

These provisions, summarized below, are expected to discourage coercive takeover practices and inadequate takeover bids. These provisions are also designed to encourage persons seeking to acquire control of us to first negotiate with us. We believe that the benefits of increased protection and our potential ability to negotiate with the proponent of an unfriendly or unsolicited proposal to acquire or restructure us outweigh the disadvantages of discouraging these proposals because, among other things, negotiation of these proposals could result in an improvement of their terms.

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**Delaware Law** 

Our amended and restated certificate of incorporation provides that we are not governed by Section 203 of the Delaware General Corporation Law ("DGCL"), which, in the absence of such provisions, would have

imposed additional requirements regarding mergers and other business combinations. Section 203 of the DGCL prohibits a Delaware corporation, including those whose securities are listed for trading on the NYSE, from engaging in any business combination with any interested stockholder for a period of three years following the date that the stockholder became an interested stockholder, unless:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• the transaction is approved by the board of directors before the date the interested stockholder attained that
status;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• upon consummation of the transaction that resulted in the stockholder becoming an interested stockholder, the
interested stockholder owned at least 85% of the voting stock of the corporation outstanding at the time the transaction commenced; or

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• on or after such time the business combination is approved by the board of directors and authorized at a meeting
of stockholders by at least two-thirds of the outstanding voting stock that is not owned by the interested stockholder.

**Our Amended and Restated Certificate of Incorporation and Our Amended and Restated Bylaws** 

Certain provisions of our amended and restated certificate of incorporation and amended and restated bylaws may delay or discourage transactions involving an actual or potential change in control or change in our management, including transactions in which stockholders might otherwise receive a premium for their shares, or transactions that our stockholders might otherwise deem to be in their best interests. Therefore, these provisions could adversely affect the price of our Class A common stock.

Among other things, our amended and restated certificate of incorporation and amended and restated bylaws:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• establish advance notice procedures with regard to stockholder proposals relating to the nomination of candidates
for election as directors or new business to be brought before meetings of our stockholders. These procedures provide that notice of stockholder proposals must be timely given in writing to our corporate secretary prior to the meeting at which the
action is to be taken. Generally, to be timely, notice must be received at our principal executive offices not less than 90 days nor more than 120 days prior to the first anniversary date of the annual meeting for the preceding year. Our amended and
restated bylaws specify the requirements as to form and content of all stockholders' notices. These requirements may preclude stockholders from bringing matters before the stockholders at an annual or special meeting;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• provide our board of directors the ability to authorize undesignated preferred stock. This ability makes it
possible for our board of directors to issue, without stockholder approval, preferred stock with voting or other rights or preferences that could impede the success of any attempt to change control of us. These and other provisions may have the
effect of deferring hostile takeovers or delaying changes in control or management of our company;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• provide that the authorized number of directors may be changed only by resolution of the board of directors;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• provide that all vacancies, including newly created directorships, may, except as otherwise required by law or,
if applicable, the rights of holders of a series of preferred stock, be filled by the affirmative vote of a majority of directors then in office, even if less than a quorum;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• provide that any action required or permitted to be taken by the stockholders must be effected at a duly called
annual or special meeting of stockholders and may not be effected by any consent in writing in

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lieu of a meeting of such stockholders, subject to the rights of the holders of any series of preferred stock with respect to such series;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• provide that our amended and restated certificate of incorporation and amended and restated bylaws may be amended
by the affirmative vote of the holders of at least two-thirds of our then outstanding common stock entitled to vote thereon, voting together as a single class;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• provide that special meetings of our stockholders may only be called by our board of directors pursuant to a
resolution adopted by the affirmative vote of a majority of the total number of authorized directors whether or not there exist any vacancies in previously authorized directorships;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• provide for our board of directors to be divided into three classes of directors, with each class as nearly equal
in number as possible, serving staggered three-year terms, other than directors who may be elected by holders of preferred stock, if any. This system of electing and removing directors may tend to discourage a third party from making a tender offer
or otherwise attempting to obtain control of us, because it generally makes it more difficult for stockholders to replace a majority of the directors;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• provide that the affirmative vote of the holders of at least 75% of the voting power of all then outstanding
common stock entitled to vote generally in the election of directors, voting together as a single class, shall be required to remove any or all of the directors from office and such removal may only be for cause; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• provide that our amended and restated bylaws can be amended by the board of directors.

**Corporate Opportunity** 

Under our amended and restated certificate of incorporation, to the extent permitted by law:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• Yorktown Partners LLC and our directors who are not also our officers (collectively, the "Designated
Parties") have the right to, and have no duty to abstain from, exercising such right to, conduct business with any business that is competitive or in the same line of business as us, do business with any of our clients or customers, or invest
or own any interest publicly or privately in, or develop a business relationship with, any business that is competitive or in the same line of business as us;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• if the Designated Parties acquire knowledge of a potential transaction that could be a corporate opportunity,
they have no duty to offer such corporate opportunity to us; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• we have renounced any interest or expectancy in, or in being offered an opportunity to participate in, such
corporate opportunities.

**Forum Selection** 

Our amended and restated certificate of incorporation provides that unless we consent in writing to the selection of an alternative forum, the Court of Chancery of the State of Delaware will, to the fullest extent permitted by applicable law, be the sole and exclusive forum for:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• any derivative action or proceeding brought on our behalf;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• any action asserting a claim of breach of a fiduciary duty owed by any of our directors, officers, employees or
agents to us or our stockholders;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• any action asserting a claim against us or any director or officer or other employee of ours arising pursuant to
any provision of the DGCL, our amended and restated certificate of incorporation or our amended and restated bylaws; or

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• any action asserting a claim against us or any director or officer or other employee of ours that is governed by
the internal affairs doctrine, in each such case subject to such Court of Chancery having personal jurisdiction over the indispensable parties named as defendants therein.

Our amended and restated certificate of incorporation also provides that any person or entity purchasing or otherwise acquiring any interest in shares of our capital stock will be deemed to have notice of, and to have consented to, this forum selection provision. Although we believe these provisions benefit us by providing increased consistency in the application of Delaware law for the specified types of actions and proceedings, the provisions may have the effect of discouraging lawsuits against our directors, officers, employees and agents. The enforceability of similar exclusive forum provisions in other companies' certificates of incorporation has been challenged in legal proceedings, and it is possible that, in connection with one or more actions or proceedings described above, a court could rule that this provision in our amended and restated certificate of incorporation is inapplicable or unenforceable.

**Limitation of Liability and Indemnification Matters** 

Our amended and restated certificate of incorporation limits the liability of our directors for monetary damages for breach of their fiduciary duty as directors, except for liability that cannot be eliminated under the DGCL. Delaware law provides that directors of a company will not be personally liable for monetary damages for breach of their fiduciary duty as directors, except for liabilities:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• for any breach of their duty of loyalty to us or our stockholders;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• for acts or omissions not in good faith or which involve intentional misconduct or a knowing violation of law;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• for unlawful payment of dividend or unlawful stock repurchase or redemption, as provided under Section 174
of the DGCL; or

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• for any transaction from which the director derived an improper personal benefit.

Any amendment, repeal or modification of these provisions will be prospective only and would not affect any limitation on liability of a director for acts or omissions that occurred prior to any such amendment, repeal or modification.

Our amended and restated bylaws also provide that we will indemnify our directors and officers to the fullest extent permitted by Delaware law. Our amended and restated bylaws also permit us to purchase insurance on behalf of any officer, director, employee or other agent for any liability arising out of that person's actions as our officer, director, employee or agent, regardless of whether Delaware law would permit indemnification. We have entered into indemnification agreements with each of our current directors and officers and intend to enter into indemnification agreement with any future directors and officers. These agreements require us to indemnify these individuals to the fullest extent permitted under Delaware law against liability that may arise by reason of their service to us, and to advance expenses incurred as a result of any proceeding against them as to which they

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could be indemnified. We believe that the limitation of liability provision that is in our amended and restated certificate of incorporation and the indemnification agreements will facilitate our ability to continue to attract and retain qualified individuals to serve as directors and officers.

**Transfer Agent and Registrar** 

The transfer agent and registrar for our Class A common stock is Equiniti Trust Company, LLC.

**Listing** 

Our Class A common stock is listed on the NYSE and the NYSE Texas under the symbol "SEI."

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**SELLING STOCKHOLDERS** 

The selling stockholders named below may offer to sell from time to time in the future up to an aggregate of 4,182,772 shares of our Class A common stock under this prospectus. The selling stockholders acquired 4,149,458 of the shares of Class A common stock (the "consideration shares") on March 16, 2026, pursuant to the Securities Purchase Agreement. The remaining 33,314 shares of Class A common stock offered hereby (the "escrow shares") have been deposited into escrow with Truist Bank under the terms of an escrow agreement and will be disposed of in accordance with the terms of the Securities Purchase Agreement. Pursuant to certain lockup provisions of the Securities Purchase Agreement, the selling stockholders agreed that, prior to the expiration dates specified therein, they will not, directly or indirectly, offer for sale, sell or otherwise dispose of any consideration shares or escrow shares, among other restrictions on transfer specified therein, other than with our prior written consent and subject to certain customary exceptions.

The term "selling stockholders" includes the stockholders listed in the table below and their permitted transferees and assignees or other successors.

Except as described in the footnotes to the following table, none of the persons named in the table set forth below has held any position or office with, been employed by, or otherwise has had a material relationship with us or any of our affiliates during the three years prior to the date of this prospectus.

The following table sets forth information as of the date of this prospectus by each selling stockholder regarding (i) the beneficial ownership of shares of our Class A common stock and (ii) the number of shares of our Class A common stock that may from time to time be offered or sold pursuant to this prospectus. The information regarding shares of our Class A common stock beneficially owned after the offering assumes the sale of all shares of our Class A common stock offered by the selling stockholders and that the selling stockholders do not acquire any additional shares of our Class A common stock.

No offer or sale under this prospectus may be made by a stockholder unless that holder is listed in the table below, in a supplement to this prospectus or in an amendment to the related registration statement that has become effective. We may supplement or amend this prospectus to include additional selling stockholders.

The following table sets forth information relating to the selling stockholders as of the date of this prospectus, based on information supplied to us by the selling stockholders on or prior to that date and information filed with the SEC. We have not sought to verify such information. The selling stockholders may hold or acquire at any time shares of our Class A common stock in addition to the shares offered by this prospectus and may have acquired additional shares of our Class A common stock since the date on which the information reflected herein was provided to us. Additionally, the selling stockholders may have sold or transferred some or all of their shares of our Class A common stock in transactions exempt from the registration requirements of the Securities Act since such date. Other information about the selling stockholders may also change over time. The following table sets forth the maximum number of shares of our Class A common stock that may be sold by the selling stockholders identified below under this prospectus. Because the selling stockholders may offer all or some of their shares of our Class A common stock from time to time, we cannot estimate the number of shares of our Class A common stock that will be held by the selling stockholders upon the termination of any particular offering by such selling stockholders. The selling stockholders are not obligated to sell any of the shares of Class A common stock offered by this prospectus. The selling stockholders reserve the right to accept or reject, in whole or in part, any proposed sale of shares. The selling stockholders may also offer and sell less than the number of shares of Class A common stock indicated. The selling stockholders are not making any representation that any shares of Class A common stock covered by this prospectus will or will not be offered for sale.

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| | | | | | | | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|:---|:---|:---|:---|:---|:---|
|  | **Shares Beneficially Owned Before the Offering** | **Shares Beneficially Owned Before the Offering** | **Shares Beneficially Owned Before the Offering** | **Shares Beneficially Owned Before the Offering** | **Shares Beneficially Owned Before the Offering** | **Shares Beneficially Owned Before the Offering** | **Shares of<br>Class A<br>Common<br>Stock that<br>may be sold<br>hereby** | **Shares Beneficially Owned After the Offering** | **Shares Beneficially Owned After the Offering** | **Shares Beneficially Owned After the Offering** | **Shares Beneficially Owned After the Offering** | **Shares Beneficially Owned After the Offering** | **Shares Beneficially Owned After the Offering** |
| **Selling Stockholders** | **Class A<br>Common<br>Stock** | **Class A<br>Common<br>Stock** | **Class B<br>Common<br>Stock** | **Class B<br>Common<br>Stock** | **Combined<br>Voting Power<sup>(1)</sup>** | **Combined<br>Voting Power<sup>(1)</sup>** | **Shares of<br>Class A<br>Common<br>Stock that<br>may be sold<br>hereby** | **Class A<br>Common<br>Stock<sup>(2)</sup>** | **Class A<br>Common<br>Stock<sup>(2)</sup>** | **Class B<br>Common<br>Stock** | **Class B<br>Common<br>Stock** | **Combined<br>Voting<br>Power<sup>(2)</sup>** | **Combined<br>Voting<br>Power<sup>(2)</sup>** |
| **Selling Stockholders** | **Number** | **% of<br>Class** | **Number** | **% of<br>Class** | **Number** | **%** | **Shares of<br>Class A<br>Common<br>Stock that<br>may be sold<br>hereby** | **Number** | **% of<br>Class** | **Number** | **% of<br>Class** | **Number** | **%** |
|  Golem Internacional Ltd.<sup>(3)</sup> | 3176367 | 5.6% |  |  | 3176367 | 4.4% | 3176367 |  |  |  |  |  |  |
|  Eduardo Dal Sasso Mendonça Cruz<sup>(4)</sup> | 690940 | 1.2% |  |  | 690940 | \* | 690940 |  |  |  |  |  |  |
|  Henrique Coelho Casotti<sup>(5)</sup> | 125058 | \* |  |  | 125058 | \* | 125058 |  |  |  |  |  |  |
|  Adriano Cezário De Oliveira<sup>(6)</sup> | 66241 | \* |  |  | 66241 | \* | 66241 |  |  |  |  |  |  |
|  Carlos Baccan Netto<sup>(7)</sup> | 58221 | \* |  |  | 58221 | \* | 58221 |  |  |  |  |  |  |
|  Dario Almeida Albagli<sup>(8)</sup> | 25249 | \* |  |  | 25249 | \* | 25249 |  |  |  |  |  |  |
|  Diego de Oliveira Velloso<sup>(9)</sup> | 15743 | \* |  |  | 15743 | \* | 15743 |  |  |  |  |  |  |
|  Gabriel Bernardo de Almeida Arruda<sup>(10)</sup> | 12475 | \* |  |  | 12475 | \* | 12475 |  |  |  |  |  |  |
|  Marcia Pacianotto Ribeiro<sup>(11)</sup> | 12475 | \* |  |  | 12475 | \* | 12475 |  |  |  |  |  |  |

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\* Represents less than 1%. 

(1) Represents percentage of voting power of our Class A common stock and Class B common stock voting
together as a single class. Based on 56,479,314 shares of Class A common stock and 15,139,651 shares of Class B common stock outstanding as of April 8, 2026. Each share of Class B common stock has no economic rights, but entitles
the holder thereof to one vote for each Solaris LLC Unit held by such holder. Accordingly, the holders of our Class B common stock collectively have a number of votes in Solaris equal to the number of Solaris LLC Units that they hold. See
"Description of Capital Stock—Class A Common Stock" and "Description of Capital Stock—Class B Common Stock."

(2) Assumes that the selling stockholders dispose of all the shares of Class A common stock covered by this
prospectus and do not acquire beneficial ownership of any additional shares of Class A common stock. The registration of these shares of Class A common stock does not necessarily mean that the selling stockholders will sell all or any
portion of the shares of Class A common stock covered by this prospectus.

(3) Consists of (i) 3,151,069 shares of Class A common stock held directly by Golem Internacional Ltd.
("Golem") and (ii) 25,298 escrow shares, which represents the maximum number of escrow shares that may be allocated to Golem pursuant to the Securities Purchase Agreement. The primary address of Golem Internacional Ltd. is RBLA MAHATMA,
GANDHI, 331, 401, Montevideo, Uruguay.

(4) Consists of (i) 685,437 shares of Class A common stock held directly by Eduardo Dal Sasso Mendonça
Cruz and (ii) 5,503 escrow shares, which represents the maximum number of escrow shares that may be allocated to Mr. Cruz pursuant to the Securities Purchase Agreement. The primary address of Mr. Cruz is Rabida 2859, Torre B, Apartamento
102, Montevideo, Uruguay.

(5) Consists of (i) 124,062 shares of Class A common stock held directly by Henrique Coelho Casotti and (ii)
996 escrow shares, which represents the maximum number of escrow shares that may be allocated to Mr. Casotti pursuant to the Securities Purchase Agreement. The primary address of Mr. Casotti is Rambla Armenia 1624, Bloque D, AP 401, 11300,
Montevideo, Uruguay.

(6) Consists of (i) 65,714 shares of Class A common stock held directly by Adriano Cezario de Oliveria and
(ii) 527 escrow shares, which represents the maximum number of escrow shares that may be allocated to Mr. Oliveria pursuant to the Securities Purchase Agreement. The primary address of Adriano Cezário De Oliveira is Alameda Sombreiro,
200, Apto 191, Torre A, Adalgisa, Osasco, São Paulo, Brazil, CEP 06030-304.

(7) Consists of (i) 57,758 shares of Class A common stock held directly by Carlos Baccan Netto and (ii) 463
escrow shares, which represents the maximum number of escrow shares that may be allocated to Mr. Netto pursuant to the Securities Purchase Agreement. The primary address of Mr. Netto is Rua Deputado Laercio Corte, atual n 1.350, apto 101
no, Projeto Urbanistico Panamby.

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(8) Consists of (i) 25,048 shares of Class A common stock held directly by Dario Almeida Albagli and (ii) 201
escrow shares, which represents the maximum number of escrow shares that may be allocated to Mr. Albagli pursuant to the Securities Purchase Agreement. The primary address of Mr. Albagli is Rua Periquito 225 Ap: 51 A, 04514-050 Vila Uberabinha, São Paulo, Brazil.

(9) Consists of (i) 15,618 shares of Class A common stock held directly by Diego de Oliveira Velloso and (ii)
125 escrow shares, which represents the maximum number of escrow shares that may be allocated to Mr. Velloso pursuant to the Securities Purchase Agreement. The primary address of Mr. Velloso is 825 California Street, apt 111, 04566-061 Cidade Moncoes, São Paulo, Brazil.

(10) Consists of (i) 12,376 shares of Class A common stock held directly by Gabriel Bernardo de Almeida Arruda
and (ii) 99 escrow shares, which represents the maximum number of escrow shares that may be allocated to Mr. Arruda pursuant to the Securities Purchase Agreement. The primary address of Mr. Arruda is 3525 Preakness Dr., Flower Mound, Texas
75028. (11) Consists of (i) 12,376 shares of Class A common stock held directly by Marcia Pacianotto Ribeiro and (ii)
99 escrow shares, which represents the maximum number of escrow shares that may be allocated to Ms. Ribeiro pursuant to the Securities Purchase Agreement. The primary address of Ms. Ribeiro is Rua Capitao Otavio Machado, 914, Apto 41,
São Paulo, Brazil, CEP 04718-002.

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**PLAN OF DISTRIBUTION** 

The selling stockholders may sell securities described in this prospectus and any accompanying prospectus supplement through underwriters, through broker-dealers, through agents, on one or more exchanges, directly to one or more purchasers, through a combination of any of the foregoing methods of sale, or through any other method permitted by applicable law.

In addition, the selling stockholders may from time to time sell securities in compliance with Rule 144 under the Securities Act, if available, or pursuant to other available exemptions from the registration requirements under the Securities Act, rather than pursuant to this prospectus. In such event, the selling stockholders may be required by the securities laws of certain states to offer and sell the shares of common stock only through registered or licensed brokers or dealers.

We will not receive any of the proceeds from the offering by the selling stockholders of the shares of Class A common stock offered under this prospectus. If the shares are sold through underwriters or broker-dealers, we will not be responsible for underwriting discounts or commissions or agents' commissions.

The selling stockholders may set the price or prices of our securities at:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• market prices prevailing at the time of any sale under this registration statement;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• prices related to market prices; or

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• negotiated prices.

The selling stockholders may change the price of the securities offered from time to time.

The selling stockholders may act independently of us in making decisions with respect to the timing, manner and size of each of their sales.

From time to time, the selling stockholders may pledge or grant a security interest in some or all of the securities in respect of which this prospectus is delivered. If a selling stockholder defaults in performance of its secured obligations, the pledged or secured parties may offer and sell the securities from time to time by this prospectus. The selling stockholders also may transfer the securities in other circumstances. The number of securities beneficially owned by a selling stockholder will decrease as and when it transfers its securities or defaults in performing obligations secured by the securities. The plan of distribution for the securities offered and sold under this prospectus will otherwise remain unchanged, except that the transferees, distributees, pledgees, affiliates, other secured parties or other successors in interest will be selling stockholders for purposes of this prospectus.

Broker-dealers or other persons may receive discounts or commissions from the selling stockholders, or they may receive commissions from purchasers of the shares of common stock for whom they acted as agents, or both. Any of such discounts or commissions might be in excess of those customary in the types of transactions involved. Broker-dealers or other persons engaged by the selling stockholders may allow other broker-dealers or other persons to participate in resales. If a broker-dealer purchases securities as a principal, it may resell the securities for its own account under this prospectus. A distribution of the securities by the selling stockholders may also be effected through the issuance by the selling stockholder or others of derivative securities, including warrants, exchangeable securities, forward delivery contracts and the writing of options.

If the selling stockholders sell the securities in respect of which this prospectus is delivered in an underwritten offering, the underwriters may acquire the securities for their own account and resell the securities from time to time in one or more transactions, including negotiated transactions, at a fixed public offering price

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or at varying prices determined at the time of sale. In any such event described above in this paragraph, we will set forth in a supplement to this prospectus the names of the underwriters and the terms of the transactions, including any underwriting discounts, concessions or commissions and other items constituting compensation of the underwriters and broker-dealers. The underwriters from time to time may change any public offering price and any discounts, concessions or commissions allowed or reallowed or paid to broker-dealers. Unless otherwise set forth in a supplement to this prospectus, the obligations of the underwriters to purchase the securities will be subject to certain conditions, and the underwriters will be obligated to purchase all of the securities specified in the supplement if they purchase any of the securities.

If a prospectus supplement so indicates, the selling stockholders may authorize agents, underwriters or dealers to solicit offers by certain institutional investors to purchase these securities to which such prospectus supplement relates, providing for payment and delivery on a future date specified in such prospectus supplement. There may be limitations on the minimum amount that may be purchased by any such institutional investor or on the number of these securities that may be sold pursuant to such arrangements. Agents, dealers or underwriters will not have any responsibility in respect of the validity of such arrangements or such institutional investors thereunder.

The aggregate proceeds to the selling stockholders from the sale of the securities will be the purchase price of the units less the aggregate agents' discounts or commissions, if any, and other expenses of the distribution not borne by us. The selling stockholders and any agent, broker or dealer that participates in sales of securities offered by this prospectus may be deemed "underwriters" under the Securities Act and any profits, commissions or other consideration received by any agent, broker or dealer may be considered underwriting discounts or commissions under the Securities Act.

The selling stockholders may offer the shares of Class A common stock covered by this prospectus into an existing trading market on the terms described in the prospectus supplement relating thereto. Underwriters or agents could make sales in privately negotiated transactions and/or any other method permitted by law, including sales deemed to be an "at the market" offering as defined in Rule 415 promulgated under the Securities Act, which includes sales made directly on or through the NYSE, the existing trading market for our common stock, or sales made to or through a market maker other than on an exchange. Underwriters and agents who participate in any at-the-market offerings will be described in the prospectus supplement relating thereto.

Any of the selling stockholders' underwriters or agents or any of either of their affiliates may be customers of, engage in transactions with and perform services for us, and/or the selling stockholders or their affiliates in the ordinary course of business.

We and the selling stockholders expect to agree to indemnify each other against certain liabilities, including liabilities under the Securities Act. In addition, the selling stockholders may agree to indemnify any underwriters, broker-dealers and agents against, or contribute to any payments the underwriters, broker-dealers or agents may be required to make with respect to, civil liabilities, including liabilities under the Securities Act.

We have informed the selling stockholders that during such time as they may be engaged in a distribution of the shares of common stock covered by this prospectus they are required to comply with Regulation M under the Exchange Act. With exceptions, Regulation M prohibits the selling stockholders, any affiliated purchasers and other persons who participate in such a distribution from bidding for or purchasing, or attempting to induce any person to bid for or purchase, any security that is the subject of the distribution until the entire distribution is complete.

We have informed each selling stockholder that they are legally required to deliver copies of this prospectus in connection with any sale of securities made under this prospectus in accordance with applicable prospectus delivery requirements.

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##### [**Table of Contents**](#toc)
To the extent required, this prospectus may be amended or supplemented from time to time to describe a specific plan of distribution. The place and time of delivery for the securities in respect of which this prospectus is delivered will be set forth in the accompanying prospectus supplement.

In connection with offerings of securities under the registration statement of which this prospectus forms a part and in compliance with applicable law, underwriters, brokers, or dealers may engage in transactions that stabilize or maintain the market price of the securities at levels above those that might otherwise prevail in the open market. Specifically, underwriters, brokers, or dealers may over-allot in connection with offerings, creating a short position in the securities for their own accounts. For the purpose of covering a syndicate short position or stabilizing the price of the securities, the underwriters, brokers, or dealers may place bids for the securities or effect purchases of the securities in the open market. Finally, the underwriters may impose a penalty whereby selling concessions allowed to syndicate members or other brokers or dealers for distribution of the securities in offerings may be reclaimed by the syndicate if the syndicate repurchases previously distributed securities in transactions to cover short positions, in stabilization transactions or otherwise. These activities may stabilize, maintain, or otherwise affect the market price of the securities, which may be higher than the price that might otherwise prevail in the open market, and, if commenced, may be discontinued at any time.

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##### [**Table of Contents**](#toc)
**LEGAL MATTERS** 

The validity of the issuance of the securities offered in this prospectus will be passed upon for us by Gibson, Dunn & Crutcher LLP, Houston, Texas. If certain legal matters in connection with an offering of the securities made by this prospectus and a related prospectus supplement are passed upon by counsel for the underwriters of such offering, that counsel will be named in the applicable prospectus supplement related to that offering.

**EXPERTS** 

The consolidated financial statements of Solaris Energy Infrastructure, Inc. as of December 31, 2025 and 2024 and for each of the three years in the period ended December 31, 2025 and management's assessment of the effectiveness of internal control over financial reporting as of December 31, 2025 incorporated by reference in this Prospectus and in the Registration Statement have been so incorporated in reliance on the reports of BDO USA, P.C., an independent registered public accounting firm, given on the authority of said firm as experts in auditing and accounting. The report on the effectiveness of internal control over financial reporting contains an explanatory paragraph relating to the exclusion of HVMVLV, LLC from the scope of management's assessment of the effectiveness of internal control over financial reporting and our audit of internal control over financial reporting as of December 31, 2025.

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##### [**Table of Contents**](#toc)
**PART II** 

**INFORMATION NOT REQUIRED IN PROSPECTUS** 

**Item 14.** ***Other Expenses of Issuance and Distribution*.** <br>

Set forth below are the expenses (other than underwriting discounts and commissions) expected to be incurred in connection with the offering of the securities registered hereby.

---

| | |
|:---|:---|
|  SEC registration fee | $31224.0 |
|  Printing and engraving expenses | \* |
|  Accounting fees and expenses | \* |
|  Legal fees and expenses | \* |
|  Transfer agent and registrar fees | \* |
|  Trustee fees and expenses | \* |
|  Miscellaneous | \* |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Total | $nan \* |

---

\* These fees are calculated based on the number of issuances and amount of securities offered and accordingly cannot be estimated at this time. 

**Item 15.** ***Indemnification of Directors and Officers*.** <br>

**Solaris Energy Infrastructure, Inc.** 

Our amended and restated certificate of incorporation provides that a director will not be liable to the corporation or its stockholders for monetary damages to the fullest extent permitted by the DGCL. In addition, if the DGCL is amended to authorize the further elimination or limitation of the liability of directors, then the liability of a director of the corporation, in addition to the limitation on personal liability provided for in our certificate of incorporation, will be limited to the fullest extent permitted by the amended DGCL. Our amended and restated bylaws provide that the corporation will indemnify, and advance expenses to, any officer or director to the fullest extent authorized by the DGCL.

Section 145 of the DGCL provides that a corporation may indemnify directors and officers as well as other employees and individuals against expenses, including attorneys' fees, judgments, fines and amounts paid in settlement in connection with specified actions, suits and proceedings whether civil, criminal, administrative, or investigative, other than a derivative action by or in the right of the corporation, if they acted in good faith and in a manner they reasonably believed to be in or not opposed to the best interests of the corporation and, with respect to any criminal action or proceeding, had no reasonable cause to believe their conduct was unlawful. A similar standard is applicable in the case of derivative actions, except that indemnification extends only to expenses, including attorneys' fees, incurred in connection with the defense or settlement of such action and the statute requires court approval before there can be any indemnification where the person seeking indemnification has been found liable to the corporation. The statute provides that it is not exclusive of other indemnification that may be granted by a corporation's certificate of incorporation, bylaws, disinterested director vote, stockholder vote, agreement or otherwise.

Our amended and restated certificate of incorporation also contains indemnification rights for our directors and our officers. Specifically, our amended and restated certificate of incorporation provides that we shall indemnify our officers and directors to the fullest extent authorized by the DGCL. Furthermore, we may maintain insurance on behalf of our officers and directors against expense, liability or loss asserted incurred by them in their capacities as officers and directors.

We have obtained directors' and officers' insurance to cover our directors, officers and some of our employees for certain liabilities.

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##### [**Table of Contents**](#toc)
We have entered into written indemnification agreements with our directors and executive officers. Under these agreements, if an officer or director makes a claim of indemnification to us, either a majority of the independent directors or independent legal counsel selected by the independent directors must review the relevant facts and make a determination whether the officer or director has met the standards of conduct under Delaware law that would permit (under Delaware law) and require (under the indemnification agreement) us to indemnify the officer or director.

**Item 16.** ***Exhibits.*** <br>

The following documents are filed as exhibits to this registration statement, including those exhibits incorporated herein by reference to a prior filing of Solaris Energy Infrastructure, Inc. under the Securities Act or the Exchange Act as indicated in parentheses:

---

| | |
|:---|:---|
| **Exhibit<br>Number** | **Exhibits** |
| 2.1 | [Securities Purchase Agreement, dated March 16, 2026, by and among Solaris, Solaris LLC, Project G Buyer, Genco, the Sellers, and Alan Zelazo, solely in his capacity as the Sellers representative (incorporated by reference to Exhibit 2.1 to the Registrant's Form 8-K (File No. 001-38090) filed with the SEC on March 20, 2026).](http://www.sec.gov/Archives/edgar/data/1697500/000119312526117930/d69360dex21.htm) |
| 4.1 | [Amended and Restated Certificate of Incorporation of Solaris (incorporated by reference to Exhibit 3.1 to the Registrant's Form 8-K (File No. 001—38090) filed with the SEC on May 23, 2017).](http://www.sec.gov/Archives/edgar/data/1697500/000119312517179697/d382278dex31.htm) |
| 4.2 | [Certificate of Amendment of the Amended and Restated Certificate of Incorporation of Solaris (incorporated by reference to Exhibit 3.1 to the Registrant's Form 8-K (File No. 001-38090) filed with the SEC on May 22, 2023).](http://www.sec.gov/Archives/edgar/data/1697500/000155837023010316/soi-20230516xex3d1.htm) |
| 4.3 | [Certificate of Second Amendment of the Amended and Restated Certificate of Incorporation of Solaris (incorporated by reference to Exhibit 3.1 to the Registrant's Form 8-K (File No. 001-38090) filed with the SEC on September 17, 2024).](http://www.sec.gov/Archives/edgar/data/1697500/000119312524220668/d896105dex31.htm) |
| 4.4 | [Amended and Restated Bylaws of Solaris (incorporated by reference to Exhibit 3.2 to the Registrant's Form 8-K (File No. 001—38090) filed with the SEC on May 23, 2017).](http://www.sec.gov/Archives/edgar/data/1697500/000119312517179697/d382278dex32.htm) |
| 4.5 | [First Amendment to Amended and Restated Bylaws of Solaris (incorporated by reference to Exhibit 3.2 to the Registrant's Form 8-K (File No. 001-38090) filed with the SEC on September 17, 2024).](http://www.sec.gov/Archives/edgar/data/1697500/000119312524220668/d896105dex32.htm) |
| 5.1 | [Opinion of Gibson, Dunn & Crutcher LLP as to the legality of the securities being registered.](d112487dex51.htm) |
| 23.1 | [Consent of BDO USA, P.C.](d112487dex231.htm) |
| 23.2 | [Consent of Gibson, Dunn & Crutcher LLP (included in Exhibit 5.1).](d112487dex51.htm) |
| 24.1 | [Power of Attorney (included on signature pages of this registration statement).](d112487ds3asr.htm#sig) |
| 107 | [Filing Fee Table.](d112487dexfilingfees.htm) |

---

**Item 17.** ***Undertakings*.** <br>

The undersigned registrant hereby undertakes:

(a) To file, during any period in which offers or sales are being made, a post-effective amendment to this registration statement:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(i) To include any prospectus required by Section 10(a)(3) of the Securities Act;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(ii) To reflect in the prospectus any facts or events arising after the effective date of the registration statement
(or the most recent post-effective amendment thereof) which, individually or in the

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##### [**Table of Contents**](#toc)
aggregate, represent a fundamental change in the information set forth in the registration statement. Notwithstanding the foregoing, any increase or decrease in volume of securities offered (if the total dollar value of securities offered would not exceed that which was registered) and any deviation from the low or high end of the estimated maximum offering range may be reflected in the form of prospectus filed with the SEC pursuant to Rule 424(b) if, in the aggregate, the changes in volume and price represent no more than a 20% change in the maximum aggregate offering price set forth in the "Calculation of Registration Fee" table in the effective registration statement;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(iii) To include any material information with respect to the plan of distribution not previously disclosed in the
registration statement or any material change to such information in the registration statement;

provided, however, that paragraphs (a)(i), (a)(ii) and (a)(iii) do not apply if the information required to be included in a post-effective amendment by those paragraphs is contained in reports filed with or furnished to the SEC by the registrant pursuant to Section 13 or 15(d) of the Exchange Act that are incorporated by reference in the registration statement, or is contained in a form of prospectus filed pursuant to Rule 424(b) that is part of the registration statement.

(b) That, for the purpose of determining any liability under the Securities Act, each such post-effective amendment shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

(c) To remove from registration by means of a post-effective amendment any of the securities being registered which remain unsold at the termination of the offering.

(d) That, for the purpose of determining liability under the Securities Act to any purchaser:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(i) Each prospectus filed by the registrant pursuant to Rule 424(b)(3) shall be deemed to be part of the
registration statement as of the date the filed prospectus was deemed part of and included in the registration statement; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(ii) Each prospectus required to be filed pursuant to Rule 424(b)(2), (b)(5) or (b)(7) as part of a registration
statement in reliance on Rule 430B relating to an offering made pursuant to Rule 415(a)(1)(i), (vii) or (x) for the purpose of providing the information required by Section 10(a) of the Securities Act shall be deemed to be part of and
included in the registration statement as of the earlier of the date such form of prospectus is first used after effectiveness or the date of the first contract of sale of securities in the offering described in the prospectus. As provided in Rule
430B, for liability purposes of the issuer and any person that is at that date an underwriter, such date shall be deemed to be a new effective date of the registration statement relating to the securities in the registration statement to which the
prospectus relates, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof; provided, however, that no statement made in a registration statement or prospectus that is part of the registration
statement or made in a document incorporated or deemed incorporated by reference into the registration statement or prospectus that is part of the registration statement will, as to a purchaser with a time of contract of sale prior to such effective
date, supersede or modify any statement that was made in the registration statement or prospectus that was part of the registration statement or made in any such document immediately prior to such effective date.

(e) That, for the purpose of determining liability of the registrant under the Securities Act to any purchaser in the initial distribution of the securities, the undersigned registrant undertakes that in a primary offering of securities of the undersigned registrant pursuant to this registration statement, regardless of the underwriting method used to sell the securities to the purchaser, if the securities are offered or sold to such purchaser by means of any of the following communications, the undersigned registrant will be a seller to the purchaser and will be considered to offer or sell such securities to such purchaser:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(i) Any preliminary prospectus or prospectus of the undersigned registrant relating to the offering required to be
filed pursuant to Rule 424;

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##### [**Table of Contents**](#toc)
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(ii) Any free writing prospectus relating to the offering prepared by or on behalf of the undersigned registrant or
used or referred to by such undersigned registrant;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(iii) The portion of any other free writing prospectus relating to the offering containing material information about
the undersigned registrant or its securities provided by or on behalf of the undersigned registrant; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(iv) Any other communication that is an offer in the offering made by the undersigned registrant to the purchaser.

The undersigned registrant hereby undertakes that, for purposes of determining any liability under the Securities Act, each filing of our annual report pursuant to Section 13(a) or 15(d) of the Exchange Act (and, where applicable, each filing of an employee benefit plan's annual report pursuant to Section 15(d) of the Exchange Act) that is incorporated by reference in the registration statement shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial *bona fide* offering thereof.

Insofar as indemnification for liabilities arising under the Securities Act, as amended, may be permitted to directors, officers or persons controlling the registrant pursuant to the provisions set forth or described in Item 15 of this registration statement, or otherwise, the registrant has been advised that in the opinion of the SEC such indemnification is against public policy as expressed in the Securities Act and is therefore unenforceable. In the event that a claim for indemnification against such liabilities (other than the payment by the registrant of expenses incurred or paid by a director, officer or controlling person of the registrant in the successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in connection with the securities being registered, the registrant will, unless in the opinion of their counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question whether such indemnification by them is against public policy as expressed in the Securities Act, and will be governed by the final adjudication of such issue.

The undersigned registrant hereby undertake that:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(1) For purposes of determining any liability under the Securities Act, the information omitted from the form of prospectus filed as part of the registration statement in reliance upon Rule 430A and contained in a form of prospectus filed by the registrant pursuant to Rule 424(b) (1) or (4) or 497(h) under the Securities Act shall be deemed to be part of the registration statement as of the time it was declared effective.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(2) For the purpose of determining any liability under the Securities Act of 1933, each post-effective amendment that contains a form of prospectus shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

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##### [**Table of Contents**](#toc)
**SIGNATURES** 

Pursuant to the requirements of the Securities Act of 1933, as amended, the registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-3 and has duly caused this registration statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Houston, State of Texas, on April 13, 2026.

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| | |
|:---|:---|
|  **SOLARIS ENERGY INFRASTRUCTURE, INC.** | **SOLARIS ENERGY INFRASTRUCTURE, INC.** |
| By: | /s/ WILLIAM A. ZARTLER |
|  | William A. Zartler |
|  | *Co-Chief Executive Officer* |

---

**POWER OF ATTORNEY** 

Each person whose signature appears below appoints Cynthia M. Durrett, Christopher M. Powell and Kyle S. Ramachandran, and each of them, any of whom may act without the joinder of the other, as his or her true and lawful attorneys-in-fact and agents, with full power of substitution and resubstitution, for him or her and in his name, place and stead, in any and all capacities, to sign any and all amendments (including post-effective amendments) to this Registration Statement and any Registration Statement (including any amendment thereto) for this offering that is to be effective upon filing pursuant to Rule 462(b) under the Securities Act of 1933, as amended, and to file the same, with all exhibits thereto, and all other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents full power and authority to do and perform each and every act and thing requisite and necessary to be done, as fully to all intents and purposes as he or she might or would do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents or any of them or their or his substitute or substitutes, may lawfully do or cause to be done by virtue hereof.

Pursuant to the requirements of the Securities Act of 1933, as amended, this Registration Statement has been signed below by the following persons in the capacities indicated below as of April 13, 2026.

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| | |
|:---|:---|
| **Name** | **Title** |
| /s/ WILLIAM A. ZARTLER<br> William A. Zartler | Co-Chief Executive Officer and Chairman<br> (Co-Principal Executive Officer) |
| /s/ AMANDA M. BROCK<br> Amanda M. Brock | Co-Chief Executive Officer and Director<br> (Co-Principal Executive Officer) |
| /s/ STEPHAN E. TOMPSETT<br> Stephan E. Tompsett | Chief Financial Officer<br> (Principal Financial Officer) |
| /s/ CHRISTOPHER P. WIRTZ<br> Christopher P. Wirtz | Chief Accounting Officer<br> (Principal Accounting Officer) |
| /s/ LAURIE H. ARGO<br> Laurie H. Argo | Director |
| /s/ JAMES R. BURKE<br> James R. Burke | Director |

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##### [**Table of Contents**](#toc)

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| | |
|:---|:---|
| **Name** | **Title** |
| /s/ CYNTHIA M. DURRETT<br> Cynthia M. Durrett | Director |
| /s/ EDGAR R. GIESINGER<br> Edgar R. Giesinger | Director |
| /s/ W. HOWARD KEENAN, JR.<br> W. Howard Keenan, Jr. | Director |
| /s/ A. JAMES TEAGUE<br> A. James Teague | Director |
| /s/ RAY N. WALKER, JR.<br> Ray N. Walker, Jr. | Director |
| /s/ M. MAX YZAGUIRRE<br> M. Max Yzaguirre | Director |

---

## Exhibit 5.1

**Exhibit 5.1**![LOGO](g112487g0411050538961.jpg)

April 13, 2026

Solaris Energy Infrastructure, Inc.

9651 Katy Freeway, Suite 300

Houston, Texas 77024

Re: Solaris Energy Infrastructure, Inc. Registration Statement on Form S-3

Ladies and Gentlemen:

We have acted as counsel to Solaris Energy Infrastructure, Inc., a Delaware corporation (the "<u>Company</u>"), in connection with the preparation and filing with the U.S. Securities and Exchange Commission (the "<u>Commission</u>") of a Registration Statement on Form S-3 (the "<u>Registration Statement</u>") under the Securities Act of 1933, as amended (the "<u>Securities Act</u>"), relating to the registration under the Securities Act and the proposed offering and sale from time to time pursuant to Rule 415 under the Securities Act by the selling stockholders named therein, together or separately, of up to 4,182,772 shares of the Company's Class A common stock, par value $0.01 per share (the "<u>Shares</u>").

In arriving at the opinion expressed below, we have examined originals, or copies certified or otherwise identified to our satisfaction as being true and complete copies of the originals of such documents, corporate records, certificates of officers of the Company and of public officials and other instruments as we have deemed necessary or advisable to enable us to render the opinion expressed below. In our examination, we have assumed, without independent investigation, the genuineness of all signatures, the legal capacity and competency of all natural persons, the authenticity of all documents submitted to us as originals and the conformity to original documents of all documents submitted to us as copies. As to any facts material to this opinion, we have relied to the extent we deemed appropriate and without independent investigation upon statements and representations of officers and other representatives of the Company and others.

Based upon the foregoing and in reliance thereon, and subject to the assumptions, exceptions, qualifications and limitations set forth herein, we are of the opinion that the Shares are validly issued, fully paid and nonassessable.

We render no opinion herein as to matters involving the laws of any jurisdiction other than the United States of America and, the Delaware General Corporation Law. We are not admitted to practice in the State of Delaware; however, we are generally familiar with the Delaware General Corporation Law as currently in effect and have made such inquiries as we consider necessary to render the opinion expressed above. This opinion is limited to the effect of the current state of the laws of the United States of America and, to the limited extent set forth above, the laws of the State of Delaware and the facts as they currently exist. We assume no obligation to revise or supplement this opinion in the event of future changes in such laws or the interpretations thereof or such facts.

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| |
|:---|
| **Gibson, Dunn & Crutcher LLP** |
| 811 Main Street Suite 3000 \| Houston, TX 77002-6117 \| T: 346.718.6600 \| F: 346.718.6620 \| gibsondunn.com |

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![LOGO](g112487g0411050538961.jpg)

April 13, 2026

We consent to the filing of this opinion as an exhibit to the Registration Statement, and we further consent to the use of our name under the caption "Legal Matters" in the Registration Statement and the prospectus that forms a part thereof. In giving these consents, we do not thereby admit that we are within the category of persons whose consent is required under Section 7 of the Securities Act or the rules and regulations of the Commission promulgated thereunder.

Very truly yours,

/s/ Gibson, Dunn & Crutcher LLP

## Exhibit 23.1

**Exhibit 23.1** 

<u>Consent of Independent Registered Public Accounting Firm</u> 

We hereby consent to the incorporation by reference in the Prospectus constituting a part of this Registration Statement of our reports dated February 26, 2026, relating to the consolidated financial statements and the effectiveness of internal control over financial reporting of Solaris Energy Infrastructure, Inc. (the Company) appearing in the Company's Annual Report on Form 10-K for the year ended December 31, 2025.

We also consent to the reference to us under the caption "Experts" in the Prospectus.

/s/ BDO USA, P.C.

Houston, Texas

April 13, 2026

## Ex-Filing

?xml version='1.0' encoding='ASCII'? EX-FILING FEES

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| |
|:---|
| **Calculation of Filing Fee Tables**  |
| &nbsp;&nbsp;&nbsp;&nbsp;**S-3**  |
| &nbsp;&nbsp;&nbsp;&nbsp;**Solaris Energy Infrastructure, Inc.**  |

---

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| | | | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|:---|:---|
| | | **Security Type**  | **Security Class Title**  | **Fee Calculation or Carry Forward Rule**  | **Amount Registered**  | **Proposed Maximum Offering Price Per Unit**  | **Maximum Aggregate Offering Price**  | **Fee Rate**  | **Amount of Registration Fee**  |
| **Newly Registered Securities** | **Newly Registered Securities** | **Newly Registered Securities** | **Newly Registered Securities** | **Newly Registered Securities** | **Newly Registered Securities** | **Newly Registered Securities** | **Newly Registered Securities** | **Newly Registered Securities** | **Newly Registered Securities** |
| Fees to be Paid | 1 | Equity | Class A common stock, par value $0.01 per share | 457(a) | 4182772 | $54.055 | $226099740.46 | 0.0001381 | $31224.37 |
| Fees Previously Paid |  |  |  |  |  |  |  |  |  |
| **Carry Forward Securities** | **Carry Forward Securities** | **Carry Forward Securities** | **Carry Forward Securities** | **Carry Forward Securities** | **Carry Forward Securities** | **Carry Forward Securities** | **Carry Forward Securities** | **Carry Forward Securities** | **Carry Forward Securities** |
| Carry Forward Securities |  |  |  |  |  |  |  |  |  |
|  |  |  | Total Offering Amounts: | Total Offering Amounts: | Total Offering Amounts: |  | $226099740.46  |  | $31224.37  |
|  |  |  | Total Fees Previously Paid:  | Total Fees Previously Paid:  | Total Fees Previously Paid:  |  |  |  | $0.00  |
|  |  |  | Total Fee Offsets:  | Total Fee Offsets:  | Total Fee Offsets:  |  |  |  | $0.00  |
|  |  |  | Net Fee Due:  | Net Fee Due:  | Net Fee Due:  |  |  |  | $31224.37  |

---

 **Offering Note** <br>

<sup>1</sup> Pursuant to Rule 416 under the Securities Act of 1933, as amended (the "Securities Act"), the Registrant is also registering hereunder an indeterminate number of additional shares of Class A common stock ("Common Stock") that shall be issuable to prevent dilution resulting from stock splits, stock dividends or similar transactions. Estimated solely for the purpose of calculating the registration fee in accordance with Rule 457(c) of the Securities Act, based on the average of the high and low sale prices of the Common Stock on April 7, 2026, as reported on the New York Stock Exchange. Represents shares of Common Stock hereby registered for resale by the selling stockholders.

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| |
|:---|
| |
| **Rules 457(b) and 0-11(a)(2)** |
| Fee Offset Claims |
| Fee Offset Sources |
| **Rule 457(p)** |
| Fee Offset Claims |
| Fee Offset Sources |

---