Amplitude: Skates proposes $15.7K share sale

The prior-sales table includes 185,000 Class A shares sold on September 10, 2026, for $2,275,219.06.

Available on EDGAR 11/04/2026 - 04:40 PM EST Accepted by SEC EDGAR 11/04/2026 - 04:40 PM EST Learn about SEC filing dates

Rhea-AI Filing Summary

Amplitude, Inc. (AMPL) has a Form 144 notice listing a proposed sale of 901 Class A shares for Spenser J. Skates, an officer and director, with an aggregate market value of $15,734.05 and an approximate sale date of November 4, 2026. Fidelity Brokerage Services LLC is listed as broker. The shares are described as pre-IPO shares acquired from the issuer for cash on December 7, 2011; remarks state that the sale and the prior three months’ sales took place in the account of Anne L. Skates, his spouse.

Key Figures

Proposed sale: 901 Class A shares; $15,734.05 aggregate market value Prior sale: 185,000 Class A shares; $2,275,219.06 Prior sale: 1,374 Class A shares; $19,857.42 +5 more

8 metrics

Proposed sale 901 Class A shares; $15,734.05 aggregate market value Approximate sale date November 4, 2026

Prior sale 185,000 Class A shares; $2,275,219.06 September 10, 2026

Prior sale 1,374 Class A shares; $19,857.42 September 30, 2026

Prior sale 3,539 Class A shares; $51,138.55 October 1, 2026

Prior sale 70,087 Class A shares; $1,017,553.05 October 2, 2026

Prior sale 107,136 Class A shares; $1,876,822.62 October 23, 2026

Prior sale 300 Class A shares; $5,239.00 October 26, 2026

Prior sale 16,499 Class A shares; $288,472.75 October 28, 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 technical

"as attorney-in-fact for Spenser J. 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?

The notice lists a proposed sale of 901 Class A shares, with an aggregate market value of $15,734.05 and an approximate sale date of November 4, 2026. Fidelity Brokerage Services LLC is listed as broker.

What prior AMPL sales does the Form 144 list?

It lists sales in Anne L. Skates’s account: 185,000 Class A shares on September 10, 2026, for $2,275,219.06; 1,374 on September 30 for $19,857.42; 3,539 on October 1 for $51,138.55; 70,087 on October 2 for $1,017,553.05; 107,136 on October 23 for $1,876,822.62; 300 on October 26 for $5,239.00; and 16,499 on October 28 for $288,472.75.

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

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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	901	15734.05	101261624	11/04/2026	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	12/07/2011	Pre-IPO Shares	Issuer			901	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
Anne L. Skates 201 Third StreeT Suite 200 San Francisco CA 94103	Class A	10/28/2026	16499	288472.75

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 J. Skates, an Officer and Director of the company.
Date of Notice	11/04/2026
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/ Joshua Schmitt, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Spenser J. Skates.
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)