Amplitude CCO sells 300K shares at about $13

Amplitude’s Chief Commercial Officer sold 300,000 AMPL shares under a Rule 10b5-1 plan and now holds 1,622,696 shares including restricted stock units.

Rhea-AI Filing Summary

Amplitude, Inc. (AMPL) reported that Chief Commercial Officer Nathaniel Glenn Crook sold 300,000 shares of Class A Common Stock on September 4, 2026 at a weighted average price of $12.9925 per share in open-market transactions. The sales were effected under a Rule 10b5-1 trading plan adopted on June 2, 2026. Following these sales, he held 1,622,696 shares directly, including 1,241,362 restricted stock units.

Insider Trade Summary 10b5-1

Net Seller: 300,000 shares

Net Sell 1 txn

Insider Crook Nathaniel Glenn

Role Chief Commercial Officer

Sold 300,000 shs ($3.90M)

Type	Security	Shares	Price	Value
Sale	Class A Common Stock F1, F2, F3	300,000	$12.9925	$3.90M

Holdings After Transaction: Class A Common Stock — 1,622,696 shares (Direct)

Footnotes (3)

1. F1. The sales reported were effected pursuant to a 10b5-1 trading plan adopted by the Reporting Person on June 2, 2026.
2. F2. This transaction was executed in multiple trades at prices ranging from $12.6150 to $13.5100. The price reported in Column 4 above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.
3. F3. Includes 1,241,362 restricted stock units.

Key Figures

Shares sold: 300,000 shares Weighted average sale price: $12.9925 per share Sale price range: $12.6150–$13.5100 per share +2 more

5 metrics

Shares sold 300,000 shares Class A Common Stock sold on September 4, 2026

Weighted average sale price $12.9925 per share Open-market sales on September 4, 2026

Sale price range $12.6150–$13.5100 per share Multiple trades comprising the reported transaction

Shares held after transaction 1,622,696 shares Direct holdings following the September 4, 2026 sale

Restricted stock units included 1,241,362 restricted stock units Portion of post-transaction direct holdings

Key Terms

Rule 10b5-1 trading plan, restricted stock units, weighted average sale price

3 terms

Rule 10b5-1 trading plan regulatory

"The sales reported were effected pursuant to a 10b5-1 trading plan adopted"

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

restricted stock units financial

"Includes 1,241,362 restricted stock units."

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

weighted average sale price financial

"The price reported in Column 4 above reflects the weighted average sale price."

FAQ

What insider transaction did AMPL report for Chief Commercial Officer Nathaniel Glenn Crook?

Amplitude reported that Chief Commercial Officer Nathaniel Glenn Crook sold 300,000 shares of Class A Common Stock on September 4, 2026 in open-market transactions at a weighted average price of $12.9925 per share.

How many AMPL shares does Nathaniel Glenn Crook hold after this Form 4 transaction?

After the reported sale, Nathaniel Glenn Crook directly held 1,622,696 shares of Amplitude Class A Common Stock, which includes 1,241,362 restricted stock units as disclosed in the filing.

Was the AMPL insider sale made under a Rule 10b5-1 trading plan?

Yes. The filing states the sales were effected pursuant to a Rule 10b5-1 trading plan adopted by Nathaniel Glenn Crook on June 2, 2026, indicating the transactions were pre-arranged under that plan.

What price range were the AMPL shares sold for in this insider transaction?

The transaction was executed in multiple trades at prices ranging from $12.6150 to $13.5100 per share. The reported $12.9925 reflects the weighted average sale price across those trades.

Does the Form 4 indicate how many restricted stock units Nathaniel Glenn Crook holds at AMPL?

Yes. The post-transaction holdings of 1,622,696 shares reported for Nathaniel Glenn Crook include 1,241,362 restricted stock units, as specified in the footnotes to the Form 4.

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Available on EDGAR 09/09/2026 - 05:04 PM Accepted by SEC EDGAR 09/09/2026 - 05:03 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).

X

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)
09/04/2026

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	09/04/2026		S		300,000(1)	D	$12.9925(2)	1,622,696(3)	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. The sales reported were effected pursuant to a 10b5-1 trading plan adopted by the Reporting Person on June 2, 2026.

2. This transaction was executed in multiple trades at prices ranging from $12.6150 to $13.5100. The price reported in Column 4 above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

3. Includes 1,241,362 restricted stock units.

	/s/ Elizabeth Fisher, as attorney in fact for Nathaniel Glenn Crook	09/09/2026
	** 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)