Alto Neuroscience ANRO Institutional Ownership

NYSE ANRO

$23.24 -0.08 (-0.34%)

As of: Oct 22, 2026 · 11:02 AM EDT

Institutions by Trading Activity

114 Institutions

Increased 67 58.8%

Unchanged 21 18.4%

Reduced 26 22.8%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

68.84%

▼-7.70 pp QoQ

Shares Held by Institutions

29.47Mn

of 42.81Mn outstanding

▲+9.85% QoQ

Shares Outstanding

42.81Mn

13.34Mn held outside 13F filers

Institutional Investors

114

filed 13F for Jun 2026

▲+5 vs prior quarter

Net Shares Added (QoQ)

+2.64Mn

accumulated since last quarter

Value of Holdings

$720.02Mn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Updated Oct 11, 2026

Alto Neuroscience, Inc. (NYSE:ANRO) appeared in the 13F filings of 114 institutional investors for the quarter ended June 30, 2026.

Together they owned 68.84% of the outstanding stock in Q2 2026, down from 76.54% a quarter earlier.
Total shares held in Alto Neuroscience rose 9.85% versus Q1 2026, while the number of holders rose 46.15% versus Q2 2025.
Among the 114 holders of Alto Neuroscience, 67 added to their positions, 26 reduced their stakes and 21 left their positions unchanged.
Institutional investors held 29.47Mn shares of Alto Neuroscience in total at the end of Q2 2026, up 2.64Mn from the prior quarter and up 12.24Mn from a year earlier.
Alpha Wave Global, LP led 13F holders of ANRO with 3.71Mn shares as of June 30, 2026, or 8.66% of shares outstanding.
The biggest increases in ANRO positions during Q2 2026 came from BlackRock, Inc. (+1.45Mn shares), Adage Capital Partners GP, L.L.C. (+1.22Mn shares), State Street Corp (+486.44K shares), Geode Capital Management, LLC (+385.3K shares) and Affinity Asset Advisors, LLC (+350K shares).
On the other side, among holders that kept a position in Alto Neuroscience, the largest reductions in Q2 2026 came from Vestal Point Capital, LP (-1.28Mn shares), Perceptive Advisors LLC (-400K shares), Millennium Management LLC (-263.66K shares), Susquehanna International Group, LLP (-230.5K shares) and Alkeon Capital Management LLC (-125K shares).
Per Business Quant, the top 10 investors in ANRO for the quarter ended June 30, 2026 were Alpha Wave Global, LP (3.71Mn shares), Commodore Capital LP (2.72Mn shares), BlackRock, Inc. (2.12Mn shares), Perceptive Advisors LLC (1.61Mn shares), Adage Capital Partners GP, L.L.C. (1.6Mn shares), Vanguard Capital Management LLC (1.39Mn shares), Spruce Street Capital LP (1.35Mn shares), Vivo Capital, LLC (1.21Mn shares), Franklin Templeton Inc (1.01Mn shares) and Armistice Capital, LLC (864K shares).

Form 13F Holdings

114 Institutional Holders

Report period 30 Jun, 2026

Total shares held 29.47Mn

Of outstanding 68.84%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	Alpha Wave Global, LP	0001558858	3,707,757	8.66%	0	0.00%	$97.85Mn
2	Commodore Capital LP	0001831942	2,723,196	6.36%	0	0.00%	$71.87Mn
3	BlackRock, Inc.	0002012383	2,121,009	4.95%	▲1,454,821	+218.38%	$55.97Mn
4	PERCEPTIVE ADVISORS LLC	0001224962	1,609,893	3.76%	▼400,000	-19.90%	$42.49Mn
5	ADAGE CAPITAL PARTNERS GP, L.L.C.	0001165408	1,600,000	3.74%	▲1,215,000	+315.58%	$42.22Mn
6	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	1,389,477	3.25%	▲182,452	+15.12%	$36.67Mn
7	Spruce Street Capital LP	0002050194	1,353,047	3.16%	▲27,837	+2.10%	$35.71Mn
8	Vivo Capital, LLC	0001674712	1,208,858	2.82%	▲173,307	+16.74%	$31.90Mn
9	Franklin Templeton Inc	0000038777	1,013,307	2.37%	▼88,567	-8.04%	$26.74Mn
10	ARMISTICE CAPITAL, LLC	0001601086	864,000	2.02%	▼48,000	-5.26%	$22.80Mn
11	Affinity Asset Advisors, LLC	0001773195	850,000	1.99%	▲350,000	+70.00%	$22.43Mn
12	Vestal Point Capital, LP	0001974915	785,000	1.83%	▼1,279,075	-61.97%	$20.72Mn
13	State Street Corp	0000093751	685,945	1.60%	▲486,442	+243.83%	$18.10Mn
14	GEODE CAPITAL MANAGEMENT, LLC	0001214717	678,199	1.58%	▲385,300	+131.55%	$17.90Mn
15	72 Investment Holdings, LLC	0001832749	667,778	1.56%	0	0.00%	$17.62Mn
16	Northern Trust Corp	0000073124	632,701	1.48%	▲159,298	+33.65%	$16.70Mn
17	MILLENNIUM MANAGEMENT LLC	0001273087	558,320	1.30%	▼263,662	-32.08%	$14.73Mn
18	Point72 Asset Management, L.P.	0001603466	502,950	1.17%	▼137	-0.03%	$13.27Mn
19	Integral Health Asset Management, LLC	0001773206	500,000	1.17%	0	0.00%	$13.20Mn
19	Venrock Adviser, LLC	0001615982	500,000	1.17%	0	0.00%	$13.20Mn

Showing 1 to 20 of 114 holders