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Notice of Proposed Sale · 144

Amplitude, Inc.

AMPLNASDAQEQUITYCurrent

Notice of Proposed Sale

Filed Sep 30, 2026Accepted Sep 30, 2026, 4:09 PM EDTFiling CIK 1882913Accession 0001959173-26-007155
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Structured filing — 144

primary_doc.xml

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Notice of proposed sale. The proposed amounts below do not establish that a sale occurred.

Proposed-sale notice

Issuer
Amplitude, Inc.
Issuer CIK
0001866692
SEC file number
001-40817
Phone
(415) 231-2353
Person for whose account securities are to be sold
Skates Spenser
Relationships to issuer
Member of immediate family of any of the foregoing
Street
201 THIRD STREET, SUITE 200
City
SAN FRANCISCO
State / country code
CA
Postal code
94103

Securities proposed for sale

Securities proposed for sale · 1 reported row
SecurityProposed unitsAggregate market valueUnits outstandingApproximate sale dateExchangeBroker / market maker
Class A1,37419,857.42101,261,62409/30/2026NASDAQFidelity Brokerage Services LLC

Broker / market maker — proposed row 1, entry 1

Name
Fidelity Brokerage Services LLC
Street
900 Salem Street
City
Smithfield
State / country code
RI
Postal code
02917

Acquisition of securities to be sold

Acquisition of securities to be sold · 1 reported row
SecurityAcquiredNature of acquisitionAcquired fromAmount acquiredGift transactionPayment dateNature of payment
Class A12/07/2011Pre-IPO SharesIssuer1,374N12/07/2011Cash

Sales reported in the preceding three months

Sales reported in the preceding three months · 1 reported row
SellerSecuritySale dateAmount soldGross proceeds
Anne SkatesClass A09/10/2026185,0002,275,219.06

Seller — prior-sale row 1, entry 1

Name
Anne Skates
Street
201 Third Street
Street (continued)
Suite 200
City
San Francisco
State / country code
CA
Postal code
94103

Prior-sale reporting

Nothing to report for the preceding three months
N

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.

Notice signature

Notice date
09/30/2026
Signed
/s/ Jennifer Ruchti, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Spenser J. Skates
Plan adoption dates
06/11/2026

Company context

Amplitude is the leading AI analytics platform, helping over 5,200 paying customers - including Atlassian, Burger King, NBCUniversal, and Square - build better products and digital experiences. With powerful AI Agents embedded across our platform, teams can analyze, test, and optimize user experiences faster than ever. Ranked #1 in Product Analytics for 24 consecutive quarters in G2's Summer 2026 Report, Amplitude is the best-in-class solution for product, data, and marketing teams. Learn more at amplitude.com.

Current securities

Recent company filings

  1. 144 filingSep 4, 2026
  2. 10-Q filingAug 6, 2026
  3. Results of Operations and Financial ConditionAug 5, 2026
  4. 4 filingJul 7, 2026
  5. 4 filingJul 7, 2026

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