$ANRO

$22.11 +$0.14 (0.64%) Close

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

Ownership

13F as of Q2 2026 · 39.2M shares outstanding

Who owns ANRO?

By type of holder

Institutions 100.0% Insiders 0.0% Everyone else 0.0%

Concentration Top 10 holders own 76.7%

BlackRock, Inc. 15.1% · Alpha Wave Global, LP 9.5%

Institutional ownership

100.0%

0 pts vs last qtr

Institutional holders

206

+5 vs last qtr

Net shares bought

+2.1M

by institutions in Q2 2026

New / sold out

33 / 28

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

BlackRock, Inc. +1.6M
Adage Capital Partners GP, L.L.C. +1.2M

Biggest sellers in Q2 2026

Vestal Point Capital, LP −1.3M
Divisadero Street Capital Management, LP SOLD OUT −562.2K

Who is planning to sell?

Notices of proposed sale, last 12 months

$3.6M

1 notice from 1 person

Shares covered

134.9K

0.34% 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

Nicholas Smith Officer 10b5-1 $3.6M

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, FY2024–FY2025

+17.3%

+17.28% a year

Each share's claim on the business

−14.7%

shrank without buying or selling a share

Spent on buybacks vs paid in stock

— vs $15.7M

over 2 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+ years43% 3–5 years3% 1–3 years29% Under 1 year25%

Quarterly turnover

11.7%

of institutional shares changed hands

Top 10 managers, median time held

5 years

Super Investors

Investment managers reporting ANRO on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
B BlackRock, Inc.	5.9M	15.10%	+1.6M (+36.1%)	≤2021	0.0%
Shares held by quarter Peak holding6.1M (Q3'24) Change over 8 quarters−181.9K Share of the company15.100% BlackRock, Inc.'s full portfolio →
AW Alpha Wave Global, LP	3.7M	9.45%	Unchanged	2024	1.6%
Shares held by quarter Peak holding3.7M (Q3'24) Change over 8 quarters0 Share of the company9.450% Alpha Wave Global, LP's full portfolio →

BlackRock, Inc.

5.9M

% of company

15.10%

Change vs last qtr

+1.6M (+36.1%)

Held since

≤2021

Alpha Wave Global, LP

3.7M

% of company

9.45%

Change vs last qtr

Unchanged

Held since

2024

28 more super investors behind a free account

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

Institutional Funds

Mutual funds and ETFs reporting ANRO on Form N-PORT; together they hold 40.9% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
VT Vanguard Total Stock Market Index Fund Vanguard Index Funds	$42M	2.2M	5.57%	0.00%	June 30, 2026
IR iShares Russell 2000 ETF iShares Trust	$30.2M	1.6M	4.17%	0.04%	June 30, 2026

Vanguard Total Stock Market Index Fund

Vanguard Index Funds

Position value

$42M

% of company

5.57%

% of the fund

0.00%

As of

June 30, 2026

iShares Russell 2000 ETF

iShares Trust

Position value

$30.2M

% of company

4.17%

% of the fund

0.04%

As of

June 30, 2026

23 more funds behind a free account

See every fund holding Alto Neuroscience 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
EA Etkin Amit Insider	833.9K	2.13%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company2.130% Etkin Amit's insider activity →
SN Smith Nicholas Conrad Insider	79.1K	0.20%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company0.200% Smith Nicholas Conrad's insider activity →

Etkin Amit

Insider

833.9K

% of company

2.13%

Change vs last qtr

—

Held since

—

Smith Nicholas Conrad

Insider

79.1K

% of company

0.20%

Change vs last qtr

—

Held since

—

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