$AMPL

$17.30 -$0.12 (0.69%) Close

$AMPL Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 129.4M shares outstanding

Who owns AMPL?

By type of holder

Institutions 61.8% Insiders 0.1% Everyone else 38.1%

Concentration Top 10 holders own 37.3%

Wellington Management Group LLP 8.6% · BlackRock, Inc. 7.8%

Institutional ownership

61.8%

-2.6 pts vs last qtr

Institutional holders

201

-19 vs last qtr

Net shares bought

−3.4M

by institutions in Q2 2026

New / sold out

35 / 54

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

FMR LLC +2.7M
Trigran Investments, Inc. +1.9M

Biggest sellers in Q2 2026

Nuveen, LLC −2.3M
Millennium Management LLC −1.6M

Who is planning to sell?

Notices of proposed sale, last 12 months

$15.4M

14 notices from 7 people

Shares covered

1.3M

0.98% of the company

Arranged in advance

100%

of the value is under a 10b5-1 plan

Under a 10b5-1 plan No plan

Largest proposed sellers

Skates Spenser Member of immediate family of any of the foregoing 10b5-1 $5.25M
Anne Lee Skates Director 10b5-1 $5.16M

Every notice on Red Flags →

A Form 144 is notice of a planned sale, not the sale itself. What insiders actually sold is on Insider Transactions.

Is your stake being diluted?

Diluted share count, FY2020–FY2025

+426.6%

+39.41% a year

Each share's claim on the business

−81.0%

shrank without buying or selling a share

Spent on buybacks vs paid in stock

$31.4M vs $399M

over 6 fiscal years

Diluted shares, split-adjusted

Buybacks Stock-based comp

How patient are the owners?

Institutional shares by how long they've been held

5+ years0% 3–5 years57% 1–3 years31% Under 1 year12%

Quarterly turnover

16.1%

of institutional shares changed hands

Top 10 managers, median time held

4.5 years

Super Investors

Investment managers reporting AMPL on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
WM Wellington Management Group LLP	11.1M	8.57%	−68.6K (−0.6%)	2025	0.0%
Shares held by quarter Peak holding11.2M (Q1'26) Change over 8 quarters+11.1M Share of the company8.570% Wellington Management Group LLP's full portfolio →
B BlackRock, Inc.	10.0M	7.76%	−117.4K (−1.2%)	2021	0.0%
Shares held by quarter Peak holding10.2M (Q1'26) Change over 8 quarters+3.9M Share of the company7.760% BlackRock, Inc.'s full portfolio →

Wellington Management Group LLP

11.1M

% of company

8.57%

Change vs last qtr

−68.6K (−0.6%)

Held since

2025

BlackRock, Inc.

10.0M

% of company

7.76%

Change vs last qtr

−117.4K (−1.2%)

Held since

2021

28 more super investors behind a free account

See every manager holding Amplitude, Inc., how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting AMPL on Form N-PORT; together they hold 25.2% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
SS Select Software and IT Services Portfolio Fidelity Select Portfolios	$66.9M	4.7M	3.67%	0.85%	August 31, 2026
VT Vanguard Total Stock Market Index Fund Vanguard Index Funds	$21.2M	2.8M	2.14%	0.00%	June 30, 2026

Select Software and IT Services Portfolio

Fidelity Select Portfolios

Position value

$66.9M

% of company

3.67%

% of the fund

0.85%

As of

August 31, 2026

Vanguard Total Stock Market Index Fund

Vanguard Index Funds

Position value

$21.2M

% of company

2.14%

% of the fund

0.00%

As of

June 30, 2026

23 more funds behind a free account

See every fund holding Amplitude, Inc. and how much of the fund the position is.

Insiders and 5%+ holders

From Forms 3/4/5 and Schedules 13D/G

Holder	Shares	% of company	Change vs last qtr	8 quarters	Held since	% of their book
TT Tzuo Tien Insider	95.7K	0.07%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company0.070% Tzuo Tien's insider activity →
VE Vishria Eric Insider	49.8K	0.04%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company0.040% Vishria Eric's insider activity →

Tzuo Tien

Insider

95.7K

% of company

0.07%

Change vs last qtr

—

Held since

—

Vishria Eric

Insider

49.8K

% of company

0.04%

Change vs last qtr

—

Held since

—

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