AMPL SEC Filing News — Amplitude, Inc.

Latest SEC filings for Amplitude, Inc. (AMPL) explained in plain English. Covers insider buying and selling (Form 4), proposed insider sales (Form 144), material company events (8-K), and quarterly & annual reports (10-Q / 10-K). StrongBuyAnalytics provides navigation and brief excerpts or summaries; original filings remain at the SEC/source links and were authored by their filers, not StrongBuyAnalytics. Filing dates shown are source dates. Coverage and detection can be delayed or incomplete because of SEC availability, amendments, parsing, caching, or outages. Latest source filing date shown: 2026-10-15.

Amplitude, Inc., together with its subsidiaries, provides an AI analytics platform that helps analyze customer behavior within digital products in the United States and internationally. It offers Amplitude Analytics, which provides real-time insights into user behavior; Amplitude Session Replay, a tool that offers a qualitative perspective by reconstructing user journeys; Amplitude Feature Experimentation, which enables product, data, and engineering teams to build experiments; Amplitude Web Exp…
Sector: Technology Industry: Software - Application Market Cap: $2.0B CIK: 1866692
20
Total Filings
0
Bullish Classifications
4
Bearish Classifications
12
Insider Transactions
2
Material Events (8-K)
1
Periodic Reports
Rule-based classifications for AMPL currently lean bearish. Of the 20 filing records displayed, 4 carry bearish classifications (such as insider sales or negative 8-K disclosures) versus 0 bullish. This does not necessarily signal fundamental deterioration — insiders sell for many reasons — but it is worth monitoring alongside the company's core financial metrics.
AMPL Filing Activity Snapshot 2026-07-10 — 2026-10-15
Insider Transactions (Form 4)
0 buys vs 4 sells
Net insider selling in this period — insiders sell for many reasons beyond conviction.
Largest Form 144 Filing
$3.90M
Crook Nathaniel Glenn (Chief Commercial Officer) · 2026-09-09
300,000 shares · Form 4
Form 144 Notices
5
Proposed insider sales filed — Form 144 is a notice of intent, not a confirmed transaction. Actual sales are confirmed via Form 4.
Insider Transactions 12 · Forms 3, 4 and 5

A Form 4 is filed within two business days of a company insider — an officer, a director, or a holder of more than ten percent of the stock — changing their position in the shares. All 12 filings in this group are Form 4s for Amplitude, Inc.

The difficulty with reading these filings as a group is that a single form type covers transactions that mean entirely different things. An executive spending their own money to buy stock and an executive having shares withheld to pay tax on a vesting grant both appear as a Form 4. Every filing below is therefore tagged with the nature of the underlying transaction, taken from the transaction code reported on the form itself.

Across the 12 insider filings shown, the breakdown is 4 open-market sale, 4 tax withholding, 3 compensation award and 1 gift. 4 of them involved a discretionary open-market trade; the rest are compensation and administrative mechanics.

What each transaction type means

Open-market sale ×4
The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.
Tax withholding ×4
Shares were withheld by the company to settle tax due when equity vested. This is an automatic administrative step and not a decision to sell.
Compensation award ×3
Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.
Gift ×1
Shares were transferred as a gift, typically for estate or charitable planning. No sale into the market took place.
Form 4 Compensation award Tax / Compensation Filing 2026-10-15

AMPL insider Form 4 filed for equity award, exercise, or tax withholding

Raji Vijaye Ganesh (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code Nature Shares Price Value
A Compensation award 37,851 — —
Filing: Form 4 (Insider Transaction) Insider: Raji Vijaye Ganesh (Director) Shares: 37,851
View on SEC EDGAR → Open Filing Document →
Form 4 Compensation award Tax / Compensation Filing 2026-10-07

AMPL insider Form 4 filed for equity award, exercise, or tax withholding

Schultz Erica (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code Nature Shares Price Value
A Compensation award 892 — —
Filing: Form 4 (Insider Transaction) Insider: Schultz Erica (Director) Shares: 892
View on SEC EDGAR → Open Filing Document →
Form 4 Compensation award Tax / Compensation Filing 2026-10-07

AMPL insider Form 4 filed for equity award, exercise, or tax withholding

Tzuo Tien (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code Nature Shares Price Value
A Compensation award 818 — —
Filing: Form 4 (Insider Transaction) Insider: Tzuo Tien (Director) Shares: 818
View on SEC EDGAR → Open Filing Document →
Form 4 Open-market sale Insider Selling 2026-10-06

AMPL insider Skates Spenser (Director, CEO and President, 10% Owner) sold 70,087 shares (~$1.02M)

Skates Spenser, listed as Director, CEO and President, 10% Owner at Amplitude, Inc., reported an open-market sale of 70,087 AMPL shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code Nature Shares Price Value
C Derivative conversion 70,087 — —
S Open-market sale 70,087 $14.52 $1.02M
C Derivative conversion derivative · Class B Common Stock 70,087 — —
Filing: Form 4 (Insider Transaction) Insider: Skates Spenser (Director, CEO and President, 10% Owner) Shares: 70,087 Est. Value: $1.02M
View on SEC EDGAR → Open Filing Document →
Form 4 Open-market sale Insider Selling 2026-10-02

AMPL insider Skates Spenser (Director, CEO and President, 10% Owner) sold 4,913 shares (~$71.0K)

Skates Spenser, listed as Director, CEO and President, 10% Owner at Amplitude, Inc., reported an open-market sale of 4,913 AMPL shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code Nature Shares Price Value
C Derivative conversion 1,374 — —
S Open-market sale 1,374 $14.45 $19.9K
C Derivative conversion 3,539 — —
S Open-market sale 3,539 $14.45 $51.1K
C Derivative conversion derivative · Class B Common Stock 1,374 — —
C Derivative conversion derivative · Class B Common Stock 3,539 — —
Filing: Form 4 (Insider Transaction) Insider: Skates Spenser (Director, CEO and President, 10% Owner) Shares: 4,913 Est. Value: $71.0K
View on SEC EDGAR → Open Filing Document →
Form 4 Open-market sale Insider Selling 2026-09-14

AMPL insider Skates Spenser (Director, CEO and President, 10% Owner) sold 185,000 shares (~$2.28M)

Skates Spenser, listed as Director, CEO and President, 10% Owner at Amplitude, Inc., reported an open-market sale of 185,000 AMPL shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code Nature Shares Price Value
C Derivative conversion 185,000 — —
S Open-market sale 185,000 $12.30 $2.28M
C Derivative conversion derivative · Class B Common Stock 185,000 — —
Filing: Form 4 (Insider Transaction) Insider: Skates Spenser (Director, CEO and President, 10% Owner) Shares: 185,000 Est. Value: $2.28M
View on SEC EDGAR → Open Filing Document →
Form 4 Open-market sale Insider Selling 2026-09-09

AMPL insider Crook Nathaniel Glenn (Chief Commercial Officer) sold 300,000 shares (~$3.90M)

Crook Nathaniel Glenn, listed as Chief Commercial Officer at Amplitude, Inc., reported an open-market sale of 300,000 AMPL shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code Nature Shares Price Value
S Open-market sale 300,000 $12.99 $3.90M
Filing: Form 4 (Insider Transaction) Insider: Crook Nathaniel Glenn (Chief Commercial Officer) Shares: 300,000 Est. Value: $3.90M
View on SEC EDGAR → Open Filing Document →
Form 4 Tax withholding Tax / Compensation Filing 2026-08-18

AMPL insider Form 4 filed for equity award, exercise, or tax withholding

Liu Curtis (Director, Chief Technology Officer, 10% Owner) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were withheld by the company to settle tax due when equity vested. This is an automatic administrative step and not a decision to sell.

Transactions reported on this filing
Code Nature Shares Price Value
F Tax withholding on vested shares 53,878 $13.03 $702.0K
Filing: Form 4 (Insider Transaction) Insider: Liu Curtis (Director, Chief Technology Officer, 10% Owner) Shares: 53,878
View on SEC EDGAR → Open Filing Document →
Form 4 Tax withholding Tax / Compensation Filing 2026-08-18

AMPL insider Form 4 filed for equity award, exercise, or tax withholding

Skates Spenser (Director, CEO and President, 10% Owner) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were withheld by the company to settle tax due when equity vested. This is an automatic administrative step and not a decision to sell.

Transactions reported on this filing
Code Nature Shares Price Value
F Tax withholding on vested shares 52,369 $13.03 $682.4K
Filing: Form 4 (Insider Transaction) Insider: Skates Spenser (Director, CEO and President, 10% Owner) Shares: 52,369
View on SEC EDGAR → Open Filing Document →
Form 4 Tax withholding Tax / Compensation Filing 2026-08-18

AMPL insider Form 4 filed for equity award, exercise, or tax withholding

Crook Nathaniel Glenn (Chief Commercial Officer) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were withheld by the company to settle tax due when equity vested. This is an automatic administrative step and not a decision to sell.

Transactions reported on this filing
Code Nature Shares Price Value
F Tax withholding on vested shares 109,368 $13.03 $1.43M
Filing: Form 4 (Insider Transaction) Insider: Crook Nathaniel Glenn (Chief Commercial Officer) Shares: 109,368
View on SEC EDGAR → Open Filing Document →
Form 4 Tax withholding Tax / Compensation Filing 2026-08-18

AMPL insider Form 4 filed for equity award, exercise, or tax withholding

Casey Andrew (Chief Financial Officer) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were withheld by the company to settle tax due when equity vested. This is an automatic administrative step and not a decision to sell.

Transactions reported on this filing
Code Nature Shares Price Value
F Tax withholding on vested shares 72,814 $13.03 $948.8K
Filing: Form 4 (Insider Transaction) Insider: Casey Andrew (Chief Financial Officer) Shares: 72,814
View on SEC EDGAR → Open Filing Document →
Form 4 Gift Tax / Compensation Filing 2026-07-10

AMPL insider Form 4 filed for equity award, exercise, or tax withholding

Liu Curtis (Director, Chief Technology Officer, 10% Owner) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were transferred as a gift, typically for estate or charitable planning. No sale into the market took place.

Transactions reported on this filing
Code Nature Shares Price Value
G Gift derivative · Class B Common Stock 175,000 — —
G Gift derivative · Class B Common Stock 175,000 — —
Filing: Form 4 (Insider Transaction) Insider: Liu Curtis (Director, Chief Technology Officer, 10% Owner)
View on SEC EDGAR → Open Filing Document →
Proposed Insider Sales 5 · Form 144

A Form 144 is a notice of intent to sell restricted or control securities. It is not a record that anything was sold. Amplitude, Inc. has 5 such notices in this period.

The distinction matters because a Form 144 is frequently reported as though it were a completed insider sale. The filer may sell all of the shares covered, some of them, or none at all, and there is no obligation to update the notice either way. A sale that is actually executed by an officer or director shows up separately on a Form 4, which is the filing to check before treating a proposed sale as a real one.

Form 144 Proposed Insider Sale 2026-10-02

AMPL Form 144 filed for proposed insider sale by Skates Spenser (70,087 shares) ~$1.02M

Skates Spenser filed a Form 144 with the SEC indicating intent to sell AMPL (Amplitude, Inc.) shares. Form 144 reflects a proposed sale, not a completed transaction. The actual execution, if any, would typically appear later in a Form 4.

Filing: Form 144 (Proposed Sale Notice) Insider: Skates Spenser Shares: 70,087 Est. Value: $1.02M
View on SEC EDGAR → Open Filing Document →
Form 144 Proposed Insider Sale 2026-10-01

AMPL Form 144 filed for proposed insider sale by Skates Spenser (3,539 shares) ~$51.1K

Skates Spenser filed a Form 144 with the SEC indicating intent to sell AMPL (Amplitude, Inc.) shares. Form 144 reflects a proposed sale, not a completed transaction. The actual execution, if any, would typically appear later in a Form 4.

Filing: Form 144 (Proposed Sale Notice) Insider: Skates Spenser Shares: 3,539 Est. Value: $51.1K
View on SEC EDGAR → Open Filing Document →
Form 144 Proposed Insider Sale 2026-09-30

AMPL Form 144 filed for proposed insider sale by Skates Spenser (1,374 shares) ~$19.9K

Skates Spenser filed a Form 144 with the SEC indicating intent to sell AMPL (Amplitude, Inc.) shares. Form 144 reflects a proposed sale, not a completed transaction. The actual execution, if any, would typically appear later in a Form 4.

Filing: Form 144 (Proposed Sale Notice) Insider: Skates Spenser Shares: 1,374 Est. Value: $19.9K
View on SEC EDGAR → Open Filing Document →
Form 144 Proposed Insider Sale 2026-09-10

AMPL Form 144 filed for proposed insider sale by Skates Spenser (185,000 shares) ~$2.28M

Skates Spenser filed a Form 144 with the SEC indicating intent to sell AMPL (Amplitude, Inc.) shares. Form 144 reflects a proposed sale, not a completed transaction. The actual execution, if any, would typically appear later in a Form 4.

Filing: Form 144 (Proposed Sale Notice) Insider: Skates Spenser Shares: 185,000 Est. Value: $2.28M
View on SEC EDGAR → Open Filing Document →
Form 144 Proposed Insider Sale 2026-09-04

AMPL Form 144 filed for proposed insider sale by Crook Nathaniel Glenn (300,000 shares) ~$3.90M

Crook Nathaniel Glenn filed a Form 144 with the SEC indicating intent to sell AMPL (Amplitude, Inc.) shares. Form 144 reflects a proposed sale, not a completed transaction. The actual execution, if any, would typically appear later in a Form 4.

Filing: Form 144 (Proposed Sale Notice) Insider: Crook Nathaniel Glenn Shares: 300,000 Est. Value: $3.90M
View on SEC EDGAR → Open Filing Document →
Material Events 2 · Form 8-K

An 8-K reports a material event in the window between scheduled reports. There are 2 in this period for Amplitude, Inc. Each 8-K names the item number it is filed under, and that number is the fastest way to tell a routine disclosure from a consequential one.

Item 2.02 is an earnings release, Item 5.02 is a change of directors or officers, and Item 1.01 or 2.01 covers a material agreement or a completed acquisition. Item 7.01 and Item 8.01 are the general-purpose disclosure items and carry no fixed meaning on their own.

Form 8-K Material Company Update 2026-10-15

AMPL filed 8-K — material company event

Amplitude, Inc. filed an 8-K with the SEC reporting a material event. Summary unavailable — view the original SEC filing for the full text.

Filing: 8-K (Material Event)
View on SEC EDGAR → Open Filing Document →
Form 8-K Material Company Update 2026-08-05

AMPL filed 8-K — material company event

Amplitude, Inc. filed an 8-K with the SEC reporting a material event. Summary unavailable — view the original SEC filing for the full text.

Filing: 8-K (Material Event)
View on SEC EDGAR → Open Filing Document →
Periodic Reports 1 · Forms 10-K and 10-Q

The periodic reports are where the audited and reviewed financial statements live. This period contains 1 quarterly report (10-Q) for Amplitude, Inc.

The two are not equivalent in weight. A 10-K is audited by an external firm and includes the full risk factor disclosure, business description and management discussion; a 10-Q is unaudited, reviewed rather than examined, and much shorter. When a figure in a quarterly report is later revised, the annual report is usually where the correction appears.

An amended report — 10-K/A or 10-Q/A — restates or corrects something in the original filing, and is worth reading against the version it replaces.

Form 10-Q Quarterly Report 2026-08-06

AMPL filed Quarterly Report (10-Q)

Amplitude, Inc. filed its quarterly report with the SEC. This report includes unaudited financial statements and management discussion for the quarter.

Filing: 10-Q (Quarterly Report)
View on SEC EDGAR → Open Filing Document →

How we classify Amplitude, Inc.'s filings

Straight from EDGAR

Each displayed record links to an original source document. StrongBuyAnalytics provides navigation and brief excerpts or summaries, not the filing itself. Parsing may omit context or contain errors, so read the original document in full.

Transaction codes, not guesswork

The nature shown on each insider filing comes from the transaction code the filer entered on the form itself — P for an open-market purchase, A for a compensation award, F for shares withheld to pay tax, M for an option exercise. Where one filing contains several codes, the transaction table lists them line by line.

Why the distinction matters

Insider activity is routinely summarised as buying or selling, which flattens together decisions that mean very different things. Shares withheld for tax on a vesting grant are an automatic administrative step; shares bought on the open market are someone committing their own money at the current price.

What this page does not tell you

A filing records what happened, not why. Form 4 does not always disclose whether a sale was executed under a pre-arranged Rule 10b5-1 plan, and no single filing is a basis for a decision on AMPL. Read these alongside the fundamentals rather than in isolation.

Frequently Asked Questions — AMPL SEC Filings

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Publisher, sources & limitations — September 15, 2026. StrongBuyAnalytics provides navigation and brief excerpts or summaries for educational use. Original filings remain at SEC EDGAR or other displayed source links; StrongBuyAnalytics does not author them. Filing dates are source dates, not publication dates for this page. Coverage can be delayed, incomplete, amended, or unavailable because of SEC/source availability, parsing, caching, or outages. Verify every material statement in the original filing.
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