Catherine M. Mazzeo

CIK: 0002033320

Transaction Breakdown

Open Market Buys (P)0 (0.0%)

High conviction signal

Open Market Sales (S)0 (0.0%)

Position reduction

Option Exercises (M)0 (0.0%)

Derivative conversions

Awards (A)8 (66.7%)

Compensation grants

Other (G, F, J, C, D, …)4 (33.3%)

Gifts, tax withholding, conversions, dispositions to the issuer and other codes

Companies & Roles (1)

SWX

Southwest Gas Holdings, Inc.

Officer

Discretionary Trading P&L

Holdings

Transaction History (12 total)

SWX
Southwest Gas Holdings, Inc.
Feb 27, 2026
Tax Payment(F)
Direct
544 shares at avg. $80.02$44K
SWX
Southwest Gas Holdings, Inc.
Feb 19, 2026
Award(A)
Direct
2.2K shares-
SWX
Southwest Gas Holdings, Inc.
Feb 19, 2026
Award(A)
Direct
4K shares-
SWX
Southwest Gas Holdings, Inc.
Jan 8, 2026
Tax Payment(F)
Direct
737 shares at avg. $80.15$59K
SWX
Southwest Gas Holdings, Inc.
Mar 4, 2025
Tax Payment(F)
Direct
254 shares at avg. $70.71$18K
SWX
Southwest Gas Holdings, Inc.
Feb 20, 2025
Award(A)
Direct
1K shares-
SWX
Southwest Gas Holdings, Inc.
Feb 20, 2025
Award(A)
Direct
3.6K shares-
SWX
Southwest Gas Holdings, Inc.
Jan 13, 2025
Tax Payment(F)
Direct
408 shares at avg. $71.43$29K
SWX
Southwest Gas Holdings, Inc.
Dec 2, 2024
Award(A)
Indirect
6 shares at avg. $78.16$440.822
SWX
Southwest Gas Holdings, Inc.
Dec 2, 2024
Award(A)
Direct
24 shares at avg. $78.16$2K
SWX
Southwest Gas Holdings, Inc.
Sep 3, 2024
Award(A)
Indirect
6 shares at avg. $71.82$438.246
SWX
Southwest Gas Holdings, Inc.
Sep 3, 2024
Award(A)
Direct
25 shares at avg. $71.82$2K

		Type	Shares	Price		Ownership
Feb 27, 2026	SWX Southwest Gas Holdings, Inc.	Tax Payment(F)	544	$80.02	$43,510	Direct
Feb 19, 2026	SWX Southwest Gas Holdings, Inc.	Award(A)	2,233	-	$0	Direct
Feb 19, 2026	SWX Southwest Gas Holdings, Inc.	Award(A)	3,965	-	$0	Direct
Jan 8, 2026	SWX Southwest Gas Holdings, Inc.	Tax Payment(F)	737	$80.15	$59,105	Direct
Mar 4, 2025	SWX Southwest Gas Holdings, Inc.	Tax Payment(F)	254	$70.71	$17,967	Direct
Feb 20, 2025	SWX Southwest Gas Holdings, Inc.	Award(A)	1,044	-	-	Direct
Feb 20, 2025	SWX Southwest Gas Holdings, Inc.	Award(A)	3,574	-	-	Direct
Jan 13, 2025	SWX Southwest Gas Holdings, Inc.	Tax Payment(F)	408	$71.43	$29,151	Direct
Dec 2, 2024	SWX Southwest Gas Holdings, Inc.	Award(A)	6	$78.16	$441	Indirect
Dec 2, 2024	SWX Southwest Gas Holdings, Inc.	Award(A)	24	$78.16	$1,841	Direct
Sep 3, 2024	SWX Southwest Gas Holdings, Inc.	Award(A)	6	$71.82	$438	Indirect
Sep 3, 2024	SWX Southwest Gas Holdings, Inc.	Award(A)	25	$71.82	$1,825	Direct

1-12 of 12 transactions

About Mazzeo Catherine M

Mazzeo Catherine M (SEC CIK 0002033320) files insider reports with the SEC as SVP/Chief Legal/Comp. Officer of Southwest Gas Holdings, Inc. (SWX).

Signal8 holds 7 ownership filings by Mazzeo Catherine M (6 Form 4, 1 Form 5), filed between Jan 15, 2025 and Mar 3, 2026. Those filings report 12 transactions, from Sep 3, 2024 to Feb 27, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on Mazzeo Catherine M's filings is in LAS VEGAS, NV.

Recent filings by Mazzeo Catherine M

Feb 27, 2026: Tax withholding of SWX shares (Form 4, code F).
Feb 19, 2026: Grants or awards of SWX shares (2 lines, Form 4, code A).
Jan 8, 2026: Tax withholding of SWX shares (Form 4, code F).
Mar 4, 2025: Tax withholding of SWX shares (Form 4, code F).
Feb 20, 2025: Grants or awards of SWX shares (2 lines, Form 4, code A).

Other insiders filing for Southwest Gas Holdings, Inc. (SWX)

Williams Julie M., SVP/Cont. Improvement and Opt.
Carson Molly R., Director
Kim Leezie, Director
Haller Karen S, President and CEO
Timperley Amy L., SVP/Chief Reg. & Public Aff.
Brown Justin L, President/Southwest Gas Corp.

How to read Form 4 transaction codes