Amplitude: Proposed share sale valued at $288K

The remarks attribute the proposed sale and earlier three-month sales to Anne L. Skates's account, although Spenser Skates is named for the sale.

Rhea-AI Filing Summary

Amplitude, Inc. (AMPL) is named in a Form 144 notice identifying 16,499 Class A shares for sale, with an aggregate market value of $288,472.75, through Fidelity Brokerage Services LLC. Spenser Skates is named as the person for whose account the securities are to be sold, while the remarks say the proposed sale and prior three-month sales took place in Anne L. Skates's account. Anne is identified as his spouse; Spenser is an officer and director. Prior sales listed for Anne included 185,000 shares on September 10, 2026 and 107,136 shares on October 23, 2026.

Key Figures

Class A shares listed for sale: 16,499 shares Aggregate market value: $288,472.75 Shares outstanding: 101,261,624 shares +2 more

5 metrics

Class A shares listed for sale 16,499 shares Sale information

Aggregate market value $288,472.75 Sale of 16,499 Class A shares

Shares outstanding 101,261,624 shares Listed in the securities information

Prior sale 185,000 shares Anne L. Skates account; September 10, 2026

Prior sale 107,136 shares Anne L. Skates account; October 23, 2026

Key Terms

Rule 144, Pre-IPO Shares, attorney-in-fact

3 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.

Pre-IPO Shares financial

"Pre-IPO Shares"

attorney-in-fact regulatory

"as attorney-in-fact for Spenser Skates"

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.

FAQ

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

How many AMPL shares are listed for sale in the Form 144?

The notice lists 16,499 Class A shares for sale, with an aggregate market value of $288,472.75. Fidelity Brokerage Services LLC is listed in the sale information.

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

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Available on EDGAR 10/28/2026 - 04:10 PM EDT Accepted by SEC EDGAR 10/28/2026 - 04:09 PM EDT 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	16499	288472.75	101261624	10/28/2026	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			16499	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
Anne L. Skates 201 Third Street Suite 200 San Francisco CA 94103	Class A	10/02/2026	70087	1017553.05
Anne L. Skates 201 Third Street Suite 200 San Francisco CA 94103	Class A	10/23/2026	107136	1876822.62
Anne L. Skates 201 Third Street, Suite 200 San Francisco CA 94103	Class A	10/26/2026	300	5239.00

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	10/28/2026
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/ Daniel Tucci, 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)