Amplitude officer may sell 300K shares of stock

Amplitude, Inc. (AMPL) received a Rule 144 notice indicating that officer Nathaniel Glenn Crook may sell up to 300,000 shares of Class A common stock through Fidelity Brokerage Services LLC on NASDAQ.

Rhea-AI Filing Summary

Amplitude, Inc. (AMPL) received a Rule 144 notice indicating that officer Nathaniel Glenn Crook may sell up to 300,000 shares of Class A common stock through Fidelity Brokerage Services LLC on NASDAQ. The shares derive from multiple restricted stock vesting events granted as compensation by the issuer.

Key Figures

Maximum shares proposed to be sold: 300,000 shares Restricted stock vesting on August 15, 2023: 28,720 shares Restricted stock vesting on November 15, 2023: 29,764 shares +4 more

7 metrics

Maximum shares proposed to be sold 300,000 shares Class A common stock under Rule 144 notice for Nathaniel Glenn Crook

Restricted stock vesting on August 15, 2023 28,720 shares Class A shares from restricted stock vesting granted as compensation

Restricted stock vesting on November 15, 2023 29,764 shares Class A shares from restricted stock vesting granted as compensation

Restricted stock vesting on February 15, 2024 32,716 shares Class A shares from restricted stock vesting granted as compensation

Restricted stock vesting on November 15, 2024 33,288 shares Class A shares from restricted stock vesting granted as compensation

Restricted stock vesting on February 15, 2025 42,606 shares Class A shares from restricted stock vesting granted as compensation

Restricted stock vesting on May 15, 2025 45,813 shares Class A shares from restricted stock vesting granted as compensation

Key Terms

Rule 144, Restricted Stock Vesting, attorney-in-fact, Compensation

4 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

Restricted Stock Vesting financial

"Class A | 08/15/2023 | Restricted Stock Vesting | Issuer"

Restricted stock vesting is the timetable and conditions under which shares granted to employees or insiders become fully owned and can be sold, typically requiring continued work or meeting performance goals. It matters to investors because large blocks of shares can become tradable at once, which can change share supply and price, and because vesting aligns insiders’ incentives with the company’s long‑term performance—think of it like a timed unlock that both rewards and locks in key people.

attorney-in-fact regulatory

"as attorney-in-fact for Nathaniel Crook"

An attorney-in-fact is the person or entity given legal authority through a power of attorney to act on behalf of another for specific tasks, such as signing documents, voting shares, or handling transactions. For investors, this matters because it lets a trusted representative make timely decisions or complete paperwork when the owner cannot, much like handing keys to someone to run errands on your behalf—so checks on scope and limits of that authority are important.

Compensation financial

"08/15/2023 | Compensation"

FAQ

What does the Form 144 filing disclose for Amplitude, Inc. (AMPL)?

It discloses that officer Nathaniel Glenn Crook has filed a notice under Rule 144 to potentially sell up to 300,000 shares of Amplitude, Inc. Class A common stock through Fidelity Brokerage Services LLC on NASDAQ.

How many AMPL Class A shares are covered by this Rule 144 notice?

The notice covers up to 300,000 shares of Amplitude, Inc. Class A common stock, to be sold through Fidelity Brokerage Services LLC, as stated in the securities information section.

Who is the Amplitude, Inc. insider involved in this Form 144?

The Form 144 relates to Nathaniel Glenn Crook, identified as an officer of Amplitude, Inc., for whose account the securities may be sold under Rule 144.

What is the origin of the AMPL shares listed in the Form 144?

The shares come from multiple restricted stock vesting events granted by the issuer as compensation, with specific vesting dates including August 15, 2023, November 15, 2023, and several dates through November 15, 2025.

Which broker is handling the potential Rule 144 sales for AMPL shares?

The broker is Fidelity Brokerage Services LLC, listed with an address in Smithfield, Rhode Island, as the firm through which the 300,000 Class A shares may be sold on NASDAQ.

Does this Form 144 confirm that the AMPL shares have already been sold?

No. A Form 144 is a notice of proposed sale under Rule 144. It indicates an intention and maximum amount (here, 300,000 shares) that may be sold, not that the sale has already occurred.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 09/04/2026 - 04:38 PM Accepted by SEC EDGAR 09/04/2026 - 04:37 PM Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0002121274
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	Amplitude, Inc.
SEC File Number	001-40817
Address of Issuer	201 THIRD STREET, SUITE 200 SAN FRANCISCO CALIFORNIA 94103
Phone	(415) 231-2353
Name of Person for Whose Account the Securities are To Be Sold	Crook Nathaniel Glenn
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Class A	Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917	300000	3897742.64	101261624	09/04/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Class A	08/15/2023	Restricted Stock Vesting	Issuer			28720	08/15/2023	Compensation
Class A	11/15/2023	Restricted Stock Vesting	Issuer			29764	11/15/2023	Compensation
Class A	02/15/2024	Restricted Stock Vesting	Issuer			32716	02/15/2024	Compensation
Class A	05/15/2024	Restricted Stock Vesting	Issuer			556	05/15/2024	Compensation
Class A	11/15/2024	Restricted Stock Vesting	Issuer			33288	11/15/2024	Compensation
Class A	02/15/2025	Restricted Stock Vesting	Issuer			42606	02/15/2025	Compensation
Class A	05/15/2025	Restricted Stock Vesting	Issuer			45813	05/15/2025	Compensation
Class A	08/15/2025	Restricted Stock Vesting	Issuer			44959	08/15/2025	Compensation
Class A	11/15/2025	Restricted Stock Vesting	Issuer			41578	11/15/2025	Compensation

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Nothing to Report

144: Remarks and Signature

Remarks
Date of Notice	09/04/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	06/02/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Daniel Tucci, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Nathaniel Crook
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)