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person · Reporting owner

Mazzeo Catherine M

Disclosed activity across 1 company

Tapewire entity
63427
SEC CIK
0002033320

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Reported relationships

Latest disclosed role at each company.

CompanyLast reported asReport datePublished
Southwest Gas Holdings, Inc.SWX · Entity 3751SVP/Chief Legal/Comp. OfficerFebruary 27, 2026March 03, 2026

Disclosed balances

About these balances

Latest available filing per company, not a reconstructed current portfolio. Matching sequences show the last reported balance with all source rows expandable; grouping alone does not establish account ownership. Do not add unresolved positions together. Filings may omit unchanged positions, and amendments may correct only part of an older disclosure. Jointly reported shares are not necessarily this owner's personal holdings.

Southwest Gas Holdings, Inc.

Report date February 27, 2026 · Filed March 03, 2026

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeDirect16,150.152 Reported balance After 2026-02-27 transaction · row 1
1 source row

Row 1 · 2026-02-27 · Tax withholding · Disposed 543.737 · Balance 16,150.152

F1: Shares withheld to cover tax on settled Performance Stock Units delivered as a result of satisfaction of performance goals and reported on February 23, 2026.

Common StockSEC Table I · non-derivativeIndirectBy 401(k)745.839 Reported balance Holding disclosure · report date 2026-02-27 · row 2 Holding and transaction disclosures are not merged.
1 source row

Row 2 · Balance 745.839

Filing footnotes · ownership attribution and instrument terms

F1: Shares withheld to cover tax on settled Performance Stock Units delivered as a result of satisfaction of performance goals and reported on February 23, 2026.

Transaction history

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Purchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”

The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.

Transaction dateCompanyActivity / securityShares / unitsReported priceReported valueDetails
February 27, 2026 Filed Mar 3, 2026 19:02 UTC Southwest Gas Holdings, Inc. SWX · Entity 3751 Tax withholdingCommon Stock 543.737 $80.02 $43,509.83
Disclosure

SEC source: 0001692115-26-000073 · wk-form4_1772582545.xml · nonDerivative · entry 1

Mazzeo Catherine M · CIK 0002033320 · SVP/Chief Legal/Comp. Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,150.152

F1 · shares: Shares withheld to cover tax on settled Performance Stock Units delivered as a result of satisfaction of performance goals and reported on February 23, 2026.

Read SEC document
February 19, 2026 Filed Feb 23, 2026 20:42 UTC Southwest Gas Holdings, Inc. SWX · Entity 3751 GrantCommon Stock 2,233.006 $0.00 $0.00
Disclosure

SEC source: 0001692115-26-000044 · wk-form4_1771897328.xml · nonDerivative · entry 2

Mazzeo Catherine M · CIK 0002033320 · SVP/Chief Legal/Comp. Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,693.889

F2 · shares: Settled Performance Stock Units delivered to the reporting person three years after grant date as a result of satisfaction of performance goals.

Read SEC document
February 19, 2026 Filed Feb 23, 2026 20:42 UTC Southwest Gas Holdings, Inc. SWX · Entity 3751 GrantCommon Stock 3,964.655 $0.00 $0.00
Disclosure

SEC source: 0001692115-26-000044 · wk-form4_1771897328.xml · nonDerivative · entry 1

Mazzeo Catherine M · CIK 0002033320 · SVP/Chief Legal/Comp. Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,460.883

F1 · shares: Each restricted stock unit represents a contingent right to receive one share of SWX common stock. Restricted stock units vest in three annual installments (40%, 30%, 30%), assuming continued service.

Read SEC document
January 08, 2026 Filed Jan 12, 2026 17:51 UTC Southwest Gas Holdings, Inc. SWX · Entity 3751 Tax withholdingCommon Stock 737.424 $80.15 $59,104.53
Disclosure

SEC source: 0001692115-26-000018 · wk-form4_1768258269.xml · nonDerivative · entry 1

Mazzeo Catherine M · CIK 0002033320 · SVP/Chief Legal/Comp. Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,496.228

F1 · balance_after: Balance includes 348.695 shares acquired through exempt dividend reinvestment transactions.

Read SEC document
March 04, 2025 Filed Mar 5, 2025 17:19 UTC Southwest Gas Holdings, Inc. SWX · Entity 3751 Tax withholdingCommon Stock 254.096 $70.71 $17,967.13
Disclosure

SEC source: 0001692115-25-000085 · wk-form4_1741213174.xml · nonDerivative · entry 1

Mazzeo Catherine M · CIK 0002033320 · SVP/Chief Legal/Comp. Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,884.957

F1 · shares: Shares withheld to cover tax on settled Performance Stock Units delivered as a result of satisfaction of performance goals and reported on February 24, 2025.

Read SEC document
February 20, 2025 Filed Feb 24, 2025 20:47 UTC Southwest Gas Holdings, Inc. SWX · Entity 3751 GrantCommon Stock 1,043.514 $0.00 $0.00
Disclosure

SEC source: 0001692115-25-000062 · wk-form4_1740448032.xml · nonDerivative · entry 2

Mazzeo Catherine M · CIK 0002033320 · SVP/Chief Legal/Comp. Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,139.053

F2 · shares: Settled Performance Stock Units delivered to the reporting person three years after grant date as a result of satisfaction of performance goals.

Read SEC document
February 20, 2025 Filed Feb 24, 2025 20:47 UTC Southwest Gas Holdings, Inc. SWX · Entity 3751 GrantCommon Stock 3,574.035 $0.00 $0.00
Disclosure

SEC source: 0001692115-25-000062 · wk-form4_1740448032.xml · nonDerivative · entry 1

Mazzeo Catherine M · CIK 0002033320 · SVP/Chief Legal/Comp. Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,095.539

F1 · shares: Each restricted stock unit represents a contingent right to receive one share of SWX common stock. Restricted stock units vest in three annual installments (40%, 30%, 30%), assuming continued service.

Read SEC document
January 13, 2025 Filed Jan 15, 2025 20:47 UTC Southwest Gas Holdings, Inc. SWX · Entity 3751 Tax withholdingCommon Stock 408.103 $71.43 $29,150.80
Disclosure

SEC source: 0001692115-25-000009 · wk-form4_1736992063.xml · nonDerivative · entry 1

Mazzeo Catherine M · CIK 0002033320 · SVP/Chief Legal/Comp. Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,472.544

Read SEC document
December 02, 2024 Filed Feb 13, 2025 18:13 UTC Southwest Gas Holdings, Inc. SWX · Entity 3751 GrantCommon Stock 5.64 $78.16 $440.82
Disclosure

SEC source: 0001692115-25-000046 · wk-form5_1739488394.xml · nonDerivative · entry 4

Mazzeo Catherine M · CIK 0002033320 · SVP/Chief Legal/Comp. Officer

10b5-1 filing: No plan indicated

Ownership: Indirect · By 401(k)

Disclosed balance after: 722.355

F1 · shares: Amounts reported were acquired through exempt dividend reinvestment transactions.

Read SEC document
December 02, 2024 Filed Feb 13, 2025 18:13 UTC Southwest Gas Holdings, Inc. SWX · Entity 3751 GrantCommon Stock 23.55 $78.16 $1,840.67
Disclosure

SEC source: 0001692115-25-000046 · wk-form5_1739488394.xml · nonDerivative · entry 2

Mazzeo Catherine M · CIK 0002033320 · SVP/Chief Legal/Comp. Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,521.504

F1 · shares: Amounts reported were acquired through exempt dividend reinvestment transactions.

Read SEC document
September 03, 2024 Filed Feb 13, 2025 18:13 UTC Southwest Gas Holdings, Inc. SWX · Entity 3751 GrantCommon Stock 6.102 $71.82 $438.25
Disclosure

SEC source: 0001692115-25-000046 · wk-form5_1739488394.xml · nonDerivative · entry 3

Mazzeo Catherine M · CIK 0002033320 · SVP/Chief Legal/Comp. Officer

10b5-1 filing: No plan indicated

Ownership: Indirect · By 401(k)

Disclosed balance after: 716.715

F1 · shares: Amounts reported were acquired through exempt dividend reinvestment transactions.

Read SEC document
September 03, 2024 Filed Feb 13, 2025 18:13 UTC Southwest Gas Holdings, Inc. SWX · Entity 3751 GrantCommon Stock 25.41 $71.82 $1,824.95
Disclosure

SEC source: 0001692115-25-000046 · wk-form5_1739488394.xml · nonDerivative · entry 1

Mazzeo Catherine M · CIK 0002033320 · SVP/Chief Legal/Comp. Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,497.954

F1 · shares: Amounts reported were acquired through exempt dividend reinvestment transactions.

Read SEC document

Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.