Amplitude CCO has 109K shares withheld for taxes

Amplitude, Inc. (AMPL) reported that Chief Commercial Officer Nathaniel Glenn Crook had 109,368 shares of Class A Common Stock withheld on August 17, 2026 to satisfy tax withholding obligations related to RSU vesting.

Rhea-AI Filing Summary

Amplitude, Inc. (AMPL) reported that Chief Commercial Officer Nathaniel Glenn Crook had 109,368 shares of Class A Common Stock withheld on August 17, 2026 to satisfy tax withholding obligations related to RSU vesting. The company notes this was not an open-market sale. Following this withholding, Crook directly holds 1,922,696 shares of Class A Common Stock, which includes 1,241,362 RSUs.

Insider Trade Summary

Tax Withholding: 109,368 shares

Tax Withholding 1 txn

Insider Crook Nathaniel Glenn

Role Chief Commercial Officer

Type	Security	Shares	Price	Value
Tax Withholding	Class A Common Stock F1, F2	109,368	$13.03	$1.43M

Holdings After Transaction: Class A Common Stock — 1,922,696 shares (Direct)

Footnotes (2)

1. F1. Represents shares of the Issuer's Class A Common Stock withheld by the Issuer solely to satisfy tax withholding obligations in connection with the net issuance of shares of the Issuer's Class A Common Stock delivered to the reporting person on August 15, 2026, from the vesting of restricted stock units ("RSUs"), and does not represent a sale by the Reporting Person.
2. F2. Includes 1,241,362 RSUs.

Key Figures

Shares Withheld for Taxes: 109,368 shares Withholding Price: $13.03 per share Shares Held After Transaction: 1,922,696 shares +1 more

4 metrics

Shares Withheld for Taxes 109,368 shares Class A Common Stock withheld on August 17, 2026 to satisfy tax withholding obligations

Withholding Price $13.03 per share Value per share applied to the 109,368 withheld shares

Shares Held After Transaction 1,922,696 shares Direct Class A Common Stock holdings following the withholding transaction

RSUs Included in Holdings 1,241,362 RSUs Restricted stock units included within the total post-transaction holdings

Key Terms

tax withholding obligations, restricted stock units ("RSUs"), net issuance

3 terms

tax withholding obligations financial

"withheld by the Issuer solely to satisfy tax withholding obligations in connection"

restricted stock units ("RSUs") financial

"from the vesting of restricted stock units ("RSUs"), and does not represent"

Restricted stock units (RSUs) are a company promise to give an employee shares of stock (or cash equivalent) in the future, but only after certain conditions—usually staying with the company for a set time or hitting performance goals—are met. Investors watch RSUs because when they vest they increase the number of shares outstanding and can lead insiders to sell shares, affecting share price, company dilution and the true cost of employee pay.

net issuance financial

"in connection with the net issuance of shares of the Issuer's Class A"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did Amplitude (AMPL) report for Nathaniel Glenn Crook?

Amplitude reported that Nathaniel Glenn Crook had 109,368 shares of Class A Common Stock withheld on August 17, 2026 to cover tax withholding obligations from RSU vesting, rather than executing an open-market sale.

Was the Amplitude (AMPL) insider Form 4 transaction an actual stock sale?

No. The Form 4 clarifies the 109,368 shares were withheld by Amplitude solely to satisfy tax withholding obligations tied to vested RSUs and "does not represent a sale" by the reporting person.

How many Amplitude (AMPL) shares does Nathaniel Glenn Crook hold after this transaction?

After the withholding transaction, Nathaniel Glenn Crook directly holds 1,922,696 shares of Amplitude Class A Common Stock, which the filing states includes 1,241,362 RSUs as part of this total position.

What price per share was used for the Amplitude (AMPL) tax-withholding shares?

The 109,368 shares withheld for tax purposes were valued at a price of $13.03 per share, as reported in the Form 4, reflecting the value applied in calculating the tax withholding amount.

What is the nature of the RSUs held by the Amplitude (AMPL) executive?

The filing states that the executive’s post-transaction holdings of 1,922,696 shares include 1,241,362 restricted stock units (RSUs), which are share-based awards that deliver Class A Common Stock upon vesting.

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

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Available on EDGAR 08/18/2026 - 05:17 PM Accepted by SEC EDGAR 08/18/2026 - 05:16 PM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Crook Nathaniel Glenn

(Last) (First) (Middle)

201 THIRD STREET

(Street)

SAN FRANCISCO CALIFORNIA 94103

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Amplitude, Inc. [ AMPL ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Commercial Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/17/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Class A Common Stock	08/17/2026		F(1)		109,368	D	$13.03	1,922,696(2)	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Represents shares of the Issuer's Class A Common Stock withheld by the Issuer solely to satisfy tax withholding obligations in connection with the net issuance of shares of the Issuer's Class A Common Stock delivered to the reporting person on August 15, 2026, from the vesting of restricted stock units ("RSUs"), and does not represent a sale by the Reporting Person.

2. Includes 1,241,362 RSUs.

	/s/ Elizabeth Fisher, as attorney in fact for Nathaniel Glenn Crook	08/18/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)