Southwest Gas Holdings, Inc. filings document the regulatory, financial, governance, and capital-structure disclosures of a NYSE-listed natural gas utility holding company. Current reports furnish operating results, dividend actions, rate-case developments, Great Basin project disclosures, and material corporate events involving Southwest Gas Holdings and Southwest Gas Corporation.
Proxy materials cover board composition, director elections, executive compensation, shareholder voting matters, and governance arrangements. The filing record also includes executive and director transition disclosures, termination of a cooperation agreement with the Icahn Group, common stock registration details, and accounting matters related to deferred income tax liabilities and financial-statement reliance.
Southwest Gas Holdings, Inc. (SWX) received Amendment No. 16 to a Schedule 13D from entities associated with Carl C. Icahn, updating their ownership in the company’s common stock.
The reporting group may be deemed to beneficially own 4,761,357 shares of Southwest Gas common stock, or 6.6% of the outstanding shares, based on 72,183,903 shares outstanding as of November 21, 2025. Icahn Partners Master Fund holds 2,062,604 shares with sole voting and dispositive power over those shares, while Icahn Partners holds 2,698,753 shares with sole voting and dispositive power.
Icahn Capital and several related Icahn entities, along with Carl C. Icahn personally, report shared voting and dispositive power over the 4,761,357 shares through their relationships to Icahn Master and Icahn Partners. IEP Utility Holdings LLC reports zero shares but is included as a signatory to a 2025 agreement. Exhibit 1, referenced in the filing, lists all reportable transactions in the shares since January 2, 2025.
Southwest Gas Holdings, Inc. president Justin L. Brown reported a sale of common stock. On 01/09/2026, he sold 3,028 shares of Southwest Gas Holdings common stock at $81.08 per share, in a transaction coded "S". The filing notes this sale was made pursuant to a Rule 10b5-1 trading plan adopted on 09/10/2025.
After this sale, Brown directly held 6,320.344 shares of common stock. He also had indirect beneficial ownership of additional shares, including 3,658.482 shares through a 401(k), 10,207.59 shares through a limited liability company in which he and his spouse are the sole members, 210.12 shares held by his spouse, and 14,586.122 shares held by a family trust for which he serves as trustee. Some of these indirect balances include shares acquired through exempt dividend reinvestment transactions.
Southwest Gas Holdings executive reports share disposition and updated holdings. On January 8, 2026, officer Gabe Randall P., SVP/Chief Administrative Officer of Southwest Gas Holdings, Inc., reported a Form 4 transaction involving 1,036.527 shares of common stock in a transaction coded "F" at a price of $80.15 per share. After this transaction, he beneficially owned 18,216.504 shares of common stock directly and 1,197.987 shares indirectly through a 401(k) plan. The direct balance includes 174.673 shares and the 401(k) balance includes 37.792 shares that were acquired through exempt dividend reinvestment transactions.
Southwest Gas Holdings senior vice president and chief financial officer Justin S. Forsberg reported a change in his ownership of company common stock. On January 8, 2026, he disposed of 407.881 shares of Southwest Gas common stock at a reported price of $80.15 per share under transaction code F. Following this transaction, he directly owned 2,297.906 common shares of Southwest Gas Holdings.
Southwest Gas Holdings executive Catherine M. Mazzeo reported an equity transaction involving company common stock. On January 8, 2026, a transaction coded "F" covered 737.424 shares of Southwest Gas Holdings common stock at $80.15 per share, leaving her with 10,496.228 shares held directly.
She also reported an additional 745.839 shares held indirectly through a 401(k) plan. The reported direct balance includes 348.695 shares and the 401(k) balance includes 23.484 shares that were acquired through exempt dividend reinvestment transactions.
Southwest Gas Holdings, Inc. executive Amy L. Timperley, SVP/Chief Regulatory & Public Affairs, reported a Form 4 transaction in Southwest Gas Holdings, Inc. common stock. On January 8, 2026, a transaction coded "F" involved 864.181 shares at $80.15 per share, leaving her with 9,153.522 directly held shares of common stock. She also reported 8,975.446 shares held indirectly through a 401(k). Footnotes state that these balances include shares acquired through exempt dividend reinvestment transactions.
Southwest Gas Holdings, Inc. executive Julie M. Williams reported a tax-related share withholding in company stock. On January 8, 2026, 1,271.426 shares of Southwest Gas Holdings common stock were withheld at a price of $80.15 per share, reported under transaction code "F," which typically reflects shares withheld to cover taxes on equity awards rather than an open-market sale.
After this transaction, Williams directly held 20,603.966 shares of common stock and indirectly held 2,485.076 shares through a 401(k) plan. The filing notes that these balances include shares previously acquired through exempt dividend reinvestment transactions.
Southwest Gas Holdings officer Fabio A. Pineda reported a disposition of company stock. On 01/08/2026, he disposed of 249.889 shares of common stock at $80.15 per share, according to a Form 4 filing. After this transaction, he beneficially owned 1,203.538 shares directly. The reported balance includes 10.915 shares that were previously acquired through exempt dividend reinvestment transactions.
Southwest Gas Holdings, Inc. President and CEO Karen S. Haller reported a change in her ownership of the company’s common stock. On January 8, 2026, she disposed of 7,630.576 shares of common stock at $80.15 per share, after which she directly owned 148,843.19 shares.
The filing also reports indirect ownership of 996 shares held by her spouse and 2,498.714 shares held through a 401(k) account. Footnotes state that the reported balances include shares acquired through exempt dividend reinvestment transactions.
Southwest Gas Holdings, Inc. reported an insider stock transaction by President of Southwest Gas Corp., Justin L. Brown. On 01/08/2026, Brown had 2,572.614 shares of common stock disposed of in a transaction coded "F" at $80.15 per share, typically indicating shares withheld in connection with equity compensation. Following this transaction, he beneficially owned 34,122.835 shares directly and 3,658.482 shares indirectly through a 401(k) plan. The balances include shares acquired through exempt dividend reinvestment transactions.