Stuart J. Zimmer

Insider Reports History

Reporting-owner location: New York, NY
Latest reporting-owner signature: /s/ Eric Crespolini, Attorney-in-Fact for Stuart J. Zimmer
Source: Latest parsed Forms 3/4/5 signature
Transaction source note: Rows are grouped by transaction date from the original SEC filing. Open the aggregated insider activity page to review issuer-level activity across dates.

Reported holdings for Stuart J. Zimmer

Form 4 holding Director, 10%+ Owner

Ategrity Specialty Insurance Co Holdings

Security class: Common Stock
Shares / value: 38,538,541
Estimated value: $750,156,554
Report date: 30 Sep 2025
Price: $19.47
Ownership: Indirect

Form 4 holding Director, 10%+ Owner

Ategrity Specialty Insurance Co Holdings

Security class: Common Stock
Shares / value: 253,330
Estimated value: $5,920,322
Report date: 29 Sep 2025
Price: $23.37
Ownership: By Trusts

Form 4 holding Chief Executive Officer, Director

Zimmer Energy Transition Acquisition Corp.

Security class: Class A Common Stock
Shares / value: 0
Estimated value
Report date: 09 Jun 2023
Price: $10.25
Ownership: By ZP Master Utility Fund, Ltd.

Insider Reports Filed by Stuart J. Zimmer

4 ASIC

Ategrity Specialty Insurance Co Holdings

Report period: 29 Sep 2025
Transactions: 2
Transaction value: +$216,089
Accepted by SEC: 01 Oct 2025, 16:05
Role: Director, 10%+ Owner
Next action: Open filing details

4 ASIC

Ategrity Specialty Insurance Co Holdings

Report period: 25 Sep 2025
Transactions: 2
Transaction value: +$192,902
Accepted by SEC: 29 Sep 2025, 21:08
Role: Director, 10%+ Owner
Next action: Open filing details

4 ASIC

Ategrity Specialty Insurance Co Holdings

Report period: 13 Aug 2025
Transactions: 1
Transaction value: +$98,426
Accepted by SEC: 15 Aug 2025, 16:05
Role: Director, 10%+ Owner
Next action: Open filing details

3 ASIC

Ategrity Specialty Insurance Co Holdings

Report period: 11 Jun 2025
Transactions: 0
Transaction value: $0
Accepted by SEC: 11 Jun 2025, 20:01
Role: Director, 10%+ Owner
Next action: Open filing details

4

Zimmer Energy Transition Acquisition Corp.

Report period: 09 Jun 2023
Transactions: 1
Transaction value: -$35,861,000
Accepted by SEC: 13 Jun 2023, 16:16
Role: Chief Executive Officer, Director
Next action: Open filing details

3

Zimmer Energy Transition Acquisition Corp.

Report period: 15 Jun 2021
Transactions: 0
Transaction value: $0
Accepted by SEC: 15 Jun 2021, 20:25
Role: Chief Executive Officer, Director
Next action: Open filing details

4

Zimmer Energy Transition Acquisition Corp.

Report period: 12 Mar 2021
Transactions: 4
Transaction value: +$35,019,885
Accepted by SEC: 22 Jun 2021, 18:08
Role: Chief Executive Officer, Director, 10%+ Owner
Next action: Open filing details

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