Skates Spenser - 11 Nov 2025 Form 4 Insider Report for Amplitude, Inc. (AMPL)

Role
Chief Executive Officer, Director, 10%+ Owner
Signature
/s/ Elizabeth Fisher, as attorney in fact for Skates Spenser
Issuer symbol
AMPL
Transactions as of
11 Nov 2025
Transactions value $
-$4,395,320
Form type
4
Filing time
13 Nov 2025, 17:12:16 UTC
Previous filing
06 Aug 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Skates Spenser Chief Executive Officer, Director, 10%+ Owner C/O AMPLITUDE, INC., 201 THIRD ST., SUITE 200, SAN FRANCISCO /s/ Elizabeth Fisher, as attorney in fact for Skates Spenser 13 Nov 2025 0001882913

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction AMPL Class A Common Stock Conversion of derivative security $0 +400K $0.00 400K 11 Nov 2025 By Spouse F1
transaction AMPL Class A Common Stock Sale -$4.4M -400K -100% $10.99 0 11 Nov 2025 By Spouse F2, F3

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction AMPL Class B Common Stock Conversion of derivative security $0 -400K -39.6% $0.00 610K 11 Nov 2025 Class A Common Stock 400K By Spouse F1
holding AMPL Class B Common Stock 5.34M 11 Nov 2025 Class A Common Stock 5.34M Direct F1
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Buy Plan / Sale Plan: These are also open market purchases/sales of shares, but in this case the transaction is part of a trading plan. Rule 10b5-1 allows insiders to setup a trading plan to buy/sell stocks over a certain period of time. Since the purchases/sales are predetermined, this protects the insiders from violating insider trading law.

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).

Explanation of Responses:

Id Content
F1 The Class B Common Stock is convertible at any time at the option of the holder into the Issuer's Class A Common Stock on a one-to-one basis. The Class B Common Stock will convert automatically into shares of the Issuer's Class A Common Stock on a one-to-one basis upon the earlier of (a) any transfer of the Class B Common Stock by the holder, whether or not for value, subject to certain exceptions, (b) the death or incapacity of Mr. Skates, (c) the date that is six months following the date on which Mr. Skates is no longer an employee or director of the Issuer (unless Mr. Skates has rejoined the Issuer during such six-month period) or (d) the date that is six months following the date on which none of the Issuer's founders is an employee or director of the Issuer (unless a founder has rejoined the Issuer during such six-month period).
F2 The sales reported were effected pursuant to a 10b5-1 trading plan adopted by the Reporting Person's spouse on August 8, 2025.
F3 This transaction was executed in multiple trades at prices ranging from $10.5500 to $11.2700. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.