Petit Monts LLC - 17 Dec 2025 Form 3 Insider Report for American Drive Acquisition Co

Role: 10%+ Owner
Signature: /s/ Spencer Cercone, Attorney-in-Fact for Petit Monts LLC
Issuer symbol: ADAC, ADACU, ADACW on Nasdaq
Transactions as of: 17 Dec 2025
Net transactions value: $0
Form type: 3
Filing time: 17 Dec 2025, 20:48:55 UTC
Next filing: 06 Feb 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Petit Monts LLC	10%+ Owner	1050 CONNECTICUT AVE. NW, SUITE 500, WASHINGTON	/s/ Spencer Cercone, Attorney-in-Fact for Petit Monts LLC	17 Dec 2025	0002082999

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
holding	ADAC	Class B ordinary shares							17 Dec 2025	Class A ordinary shares	5,675,000		Direct	F1, F2, F3

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	The Class B ordinary shares of American Dynamism Acquisition Company (the "Issuer") have no expiration date and will automatically convert into Class A ordinary shares concurrently with or immediately following the consummation of the Issuer's initial business combination, or earlier at the option of the holder, on a one-for-one basis, subject to adjustment, as described in the Registration Statement on Form S-1 (File No. 333-290625) (the "Registration Statement") related to the Issuer's initial public offering (the "IPO").
F2	Includes up to 750,000 shares subject to forfeiture by Petit Monts LLP (the "Sponsor") depending on the extent to which the IPO underwriters' over-allotment option is exercised, as described in the Registration Statement.
F3	The Sponsor is the record holder of the securities reported herein. Each of Justin Connor, Anthony Eisenberg and Jacob Gregori is a managing member of the Sponsor and no individual managing member exercises voting or investment discretion over any of the securities held by the Sponsor. Accordingly, none of them is deemed to have or share beneficial ownership of such securities.

Remarks:

Exhibit 24.1 - Power of Attorney