$AXSM

$142.20 -$1.86 (1.29%) Close

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

Ownership

13F as of Q2 2026 · 52.4M shares outstanding

Who owns AXSM?

By type of holder

Institutions 72.7% Insiders 27.3% Everyone else 0.0%

Concentration Top 10 holders own 53.3%

Tabuteau Herriot 28.1% · BlackRock, Inc. 5.9%

Institutional ownership

72.7%

+0.4 pts vs last qtr

Institutional holders

502

+94 vs last qtr

Net shares bought

+210.1K

by institutions in Q2 2026

New / sold out

137 / 43

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

Millennium Management LLC +535.3K
Norges Bank NEW +514.3K

Biggest sellers in Q2 2026

BlackRock, Inc. −809.1K
Price T Rowe Associates Inc /MD/ −674.2K

Who is planning to sell?

Notices of proposed sale, last 12 months

$134M

31 notices from 8 people

Shares covered

752.1K

1.44% of the company

Arranged in advance

90%

of the value is under a 10b5-1 plan

Under a 10b5-1 plan No plan

Largest proposed sellers

Herriot Tabuteau Officer $97.4M
Pizzie Nick Officer 10b5-1 $10.2M

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

+33.7%

+5.98% a year

Each share's claim on the business

−25.2%

shrank without buying or selling a share

Spent on buybacks vs paid in stock

— vs $315M

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+ years49% 3–5 years13% 1–3 years22% Under 1 year16%

Quarterly turnover

19.8%

of institutional shares changed hands

Top 10 managers, median time held

5 years

Super Investors

Investment managers reporting AXSM on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
B BlackRock, Inc.	3.1M	5.93%	−809.1K (−20.7%)	≤2021	0.0%
Shares held by quarter Peak holding3.9M (Q4'25) Change over 8 quarters−294.7K Share of the company5.930% BlackRock, Inc.'s full portfolio →
VP Vanguard Portfolio Management LLC	2.0M	3.79%	−74.7K (−3.6%)	≤2021	0.0%
Shares held by quarter Peak holding2.1M (Q1'26) Change over 8 quarters+2.0M Share of the company3.790% Vanguard Portfolio Management LLC's full portfolio →

BlackRock, Inc.

3.1M

% of company

5.93%

Change vs last qtr

−809.1K (−20.7%)

Held since

≤2021

Vanguard Portfolio Management LLC

2.0M

% of company

3.79%

Change vs last qtr

−74.7K (−3.6%)

Held since

≤2021

28 more super investors behind a free account

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

Institutional Funds

Mutual funds and ETFs reporting AXSM on Form N-PORT; together they hold 34.3% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
VT Vanguard Total Stock Market Index Fund Vanguard Index Funds	$340M	1.4M	2.65%	0.01%	June 30, 2026
VS Vanguard Small-Cap Index Fund Vanguard Index Funds	$246M	1.0M	1.92%	0.13%	June 30, 2026

Vanguard Total Stock Market Index Fund

Vanguard Index Funds

Position value

$340M

% of company

2.65%

% of the fund

0.01%

As of

June 30, 2026

Vanguard Small-Cap Index Fund

Vanguard Index Funds

Position value

$246M

% of company

1.92%

% of the fund

0.13%

As of

June 30, 2026

23 more funds behind a free account

See every fund holding Axsome Therapeutics, 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
TH Tabuteau Herriot Insider	14.7M	28.06%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company28.060% Tabuteau Herriot's insider activity →
CM Coleman Mark Insider	832.2K	1.59%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company1.590% Coleman Mark's insider activity →

Tabuteau Herriot

Insider

14.7M

% of company

28.06%

Change vs last qtr

—

Held since

—

Coleman Mark

Insider

832.2K

% of company

1.59%

Change vs last qtr

—

Held since

—

4 more holders behind a free account

See every insider and 5%+ holder of Axsome Therapeutics, Inc..

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