Amplitude: 70,087 shares listed for sale, worth $1.02M

Three sale entries in Anne L. Skates’s account are dated September 10, September 30 and October 1, 2026.

Rhea-AI Filing Summary

Amplitude, Inc. (AMPL) lists 70,087 Class A shares for sale for Spenser Skates’s account; he is identified as an officer and director. The remarks state that the sale and transactions during the prior three months took place in the account of Anne L. Skates, his spouse. The shares listed for sale have an aggregate market value of $1,017,553.05.

Key Figures

Shares listed for sale: 70,087 shares Aggregate market value: $1,017,553.05 Shares sold: 185,000 shares +5 more

8 metrics

Shares listed for sale 70,087 shares Class A shares

Aggregate market value $1,017,553.05 Class A shares listed for sale

Shares sold 185,000 shares Anne L. Skates account; September 10, 2026

Aggregate sale value $2,275,219.06 Anne L. Skates account; September 10, 2026

Shares sold 1,374 shares Anne L. Skates account; September 30, 2026

Aggregate sale value $19,857.42 Anne L. Skates account; September 30, 2026

Shares sold 3,539 shares Anne L. Skates account; October 1, 2026

Aggregate sale value $51,138.55 Anne L. Skates account; October 1, 2026

Key Terms

Rule 144, Pre-IPO Shares, immediate family

3 terms

Rule 144 regulatory

"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.

Pre-IPO Shares financial

"Class A | 12/07/2011 | Pre-IPO Shares | Issuer"

immediate family regulatory

"Member of immediate family of any of the foregoing"

FAQ

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

How many AMPL shares are listed for sale?

The notice lists 70,087 Class A shares for sale for Spenser Skates’s account, with an aggregate market value of $1,017,553.05. The remarks identify Anne L. Skates, his spouse, as the account in which the sale took place.

What prior AMPL share sales are listed for Anne L. Skates?

The notice lists 185,000 shares sold on September 10, 2026, for $2,275,219.06; 1,374 shares on September 30, 2026, for $19,857.42; and 3,539 shares on October 1, 2026, for $51,138.55.

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

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Available on EDGAR 10/02/2026 - 05:00 PM Accepted by SEC EDGAR 10/02/2026 - 05:00 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	0001882913
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	Skates Spenser
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	Member of immediate family of any of the foregoing

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	70087	1017553.05	101261624	10/02/2026	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	12/07/2011	Pre-IPO Shares	Issuer			70087	12/07/2011	Cash

* 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

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Anne L. Skates 201 Third Street Suite 200 San Francisco CA 94103	Class A	09/10/2026	185000	2275219.06
Anne L. Skates 201 Third Street Suite 200 San Francisco CA 94103	Class A	09/30/2026	1374	19857.42
Anne L. Skates 201 Third Street Suite 200 San Francisco CA 94103	Class A	10/01/2026	3539	51138.55

144: Remarks and Signature

Remarks	Today's sale and the securities sold in the past 3 months took place in the account of Anne L. Skates, who is the spouse of Spenser Skates, an Officer and Director of the company.
Date of Notice	10/02/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	06/11/2026
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/ Jessica Spraker, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Spenser Skates.
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)