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ANRO · Alto Neuroscience, Inc. · Holdings

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$21.97 -0.23 (-1.04%) At close · Oct 23
Russell 2000 member Rebalance outlook locked
Market Cap
$862.15M
Shares
39.24M
Volume · Oct 23 379.26K Avg daily vol (3M) 554.74K

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Use institutional holdings through the 13F API or MCP → See every holder of ANRO: 13F, 13D and 13G, insiders and funds →
Recent SEC filings are still being reconciled. Holder totals and changes may be incomplete until processing catches up.
The Sep 30, 2026 filing window is still open — showing the latest known positions. Funds that have not filed yet carry their prior-quarter positions; a fund that filed without this stock counts as sold out. Each fund's Change is measured against its own previous reported quarter, shown in the Reported column. Pick a completed quarter in the Quarter selector below to put every fund on one quarter and see the stock-wide activity breakdown.
Holders: 119
Total Value: $780,363,875
Total Shares: 29,571,318
Showing 1–100 of 121 holdings by value · page 1 of 2

Institutional Ownership Trend

11 quarters

Holder Concentration

Across 116 13F filers
Top Holder
12.5%
Mar 2024 → Jun 2026 · range 12.5% – 23.2%
of institutional value
Top 5
39.8%
Mar 2024 → Jun 2026 · range 39.8% – 57.8%
of institutional value
Top 10
59.5%
Mar 2024 → Jun 2026 · range 59.5% – 76.6%
of institutional value
HHI
494
Mar 2024 → Jun 2026 · range 494 – 1,006
Broadly held

Who Holds ANRO

Last 8 quarters through Sep 30, 2026 (filing window open)

Each kind of 13F filer's share of the common shares 13F filers report. Holder type comes from regulatory records, never the filer's name; style, turnover and horizon are measured from each filer's own 13F book. The quarter selector does not change this card.

Jun 30, 2026, the newest closed quarter: 114 filers, like-for-like change +9.8%; actively managed books -1.7%; index-like books +95.4%.

Holder type Share Filers Change
Registered adviser 76.4% 57 +2.2%
Exempt adviser 0.8% 2 -48.0%
Adviser 4.1% 4 +9.2%
Bank 5.3% 14 +102.6%
Benefit plan 0.0% 2 -90.1%
Non-US 0.2% 4 +150.0%
Holding company 8.5% 6 +177.1%
Broker-dealer 0.0% 0 -100.0%
Insurer 0.0% 0 —
Unknown 4.6% 25 -10.4%

The Sep 30, 2026 filing window is still open, so its bar carries the Jun 30, 2026 positions of filers that have not filed yet.

How the mix is measured

Shares are 13F common shares restated to today's split basis; options and principal amounts are left out. The change compares only filers with a 13F in both quarters and keeps each filer in its bucket of the later quarter on both sides; a filer that continues under a new CIK is compared through its successor. Holder type comes from each filer's current regulatory profile; client base and private funds come from the Form ADV roster current at each quarter end (rosters from December 2019, so an earlier quarter reads Unknown). Style, turnover, horizon and book size are measured from each filer's 13F book in the newest measured quarter, and Not measured means none was. Actively managed books are those measured systematic-like, concentrated or diversified active.

Excluded 1 holder with no observed 2026-06-30 13F.

Conviction and Crowding

114 13F filers, quarter ended Jun 30, 2026

Measured across every 13F filer's common-share book once the quarter's filing window closed. Crowding counts filers with high turnover or that advise private funds on Form ADV.

Conviction holders
4
3.51% of filers hold it in their top 10
Mar 31, 2026: 4
Holders above 5%
2
median weight 0.001%
Mar 31, 2026: 3
Crowding
58.1%
of shares outstanding, 99th percentile
Mar 31, 2026: 66.6%
Private-fund advisers
57.7%
of shares outstanding
Institutional ownership
84.0%
86.2% of the estimated free float
Top 10 holders
59.7%
of 13F shares, Herfindahl 0.050
Active holders
-1.7%
like-for-like share change of active filers
5% stakes on record
6
0 13D, 6 13G (2 institutional, 3 passive, 1 exempt)
How long holders have held it value-weighted 5.9 quarters
Under 1 year 42.0% 1 to 3 years 58.0% 3 years or more 0.000% Since coverage start 0.000%

Managers in the top fifth by current three-year FundScore alpha were net buyers of $643,685 (1 buying, 0 selling).

Estimated Holder Cost Basis

Quarter ended Jun 30, 2026, on that quarter's share basis

Estimated, never filed: each 13F buy is costed at its quarter's average traded price and each sale keeps the average cost, so this is what holders paid on average if they traded evenly through each quarter.

Estimated avg cost
$15.61
estimated per share
Mar 31, 2026: $13.22
Quarter-end price
$26.39
implied by 13F values
Estimated gain or loss
+69.0%
price against the estimated cost
Estimated at a loss
0.000%
of costed 13F value

Estimated cost covers 89.9% of the 13F shares; positions already held when a filer's 13F history starts, or bought in a quarter without a trusted average price, have no estimate.

Shared Holders

Companies ANRO's active holders also own, quarter ended Jun 30, 2026
# Company Shared holders
1 SRZN Surrozen, Inc. 5
2 SABS SAB Biotherapeutics, Inc. 6
3 RLMD Relmada Therapeutics, Inc. 7
4 FBRX Forte Biosciences, Inc. 5
5 ZURA Zura Bio Ltd 6
6 MNPR Monopar Therapeutics 5
7 RACC Research Alliance Corp III 5
8 AVR Anteris Technologies Global Corp. 6
9 DRUG Bright Minds Biosciences Inc. 6
10 ELVN Enliven Therapeutics, Inc. 9

Shareholder Targets

13F filers that own its peers but not ANRO, quarter ended Jun 30, 2026

Found through its holder-overlap peers: SRZN, SABS, RLMD, FBRX, ZURA, MNPR, RACC, AVR, DRUG, ELVN, LXEO, AMLX, DMRA, SVRA, TENX, AVTX, DYN, COGT, ERAS, SPRB. 533 filers in all.

# Filer In peers
1 T. Rowe Price Investment Management, Inc. Adviser, Diversified active $1,089,956,682 3 held
2 Jupiter Topco LLC Unknown, Diversified active $1,063,094,045 14 held
3 TCG Crossover Management, LLC Unknown, Diversified active $616,368,459 9 held
4 Frazier Life Sciences Management, L.P. Registered adviser, Concentrated $609,914,937 4 held
5 Polar Capital Holdings Plc Registered adviser, Diversified active $567,959,118 6 held
6 Fairmount Funds Management LLC Registered adviser, Concentrated $533,781,339 3 held
7 Siren, L.L.C. Unknown, Diversified active $521,361,827 9 held
8 RTW INVESTMENTS, LP Registered adviser, Diversified active $468,179,398 5 held
9 Logos Global Management LP Registered adviser, Diversified active $370,625,250 8 held
10 DEERFIELD MANAGEMENT COMPANY, L.P. Registered adviser, Diversified active $327,163,413 4 held

Fund Ownership of ANRO by Fund Type

Registered funds' Form N-PORT reports for the quarter ended Jun 30, 2026

Index funds and index ETFs hold 8.46% of shares outstanding.

Fund type Of shares outstanding Shares
Index funds 1.22% 478,110
Index ETFs 7.24% 2,842,760
Active ETFs 0.20% 77,223
Active funds 2.07% 812,843
Unclassified 0.04% 14,708
All registered funds 10.77% 4,225,644
How fund types are measured

Each fund series counts once, with its latest Form N-PORT report dated inside the quarter; only long share positions count, restated to today's split basis. The fund type is the series' latest Form N-CEN answer on or before the quarter end (the index-fund box and the exchange-traded flag), never its name. Unclassified funds have no usable N-CEN; unit investment trusts are among them, so index ownership is a floor. Funds sit inside their advisers' 13F reports, so these shares overlap the 13F figures and are never added to them.

Holder type: Registered adviser 60 Exempt adviser 2 Adviser 4 Bank 14 Benefit plan 2 Non-US 4 Holding company 6 Unknown 27
Showing 100 of 121
All Common Calls Puts
Export CSV
Holder Value (USD) % of 13F Shares Open
Alpha Wave Global, LP $97,847,707 12.54% 3,707,757
Commodore Capital LP $71,865,142 9.21% 2,723,196
BlackRock, Inc. $55,973,424 7.17% 2,121,009
PERCEPTIVE ADVISORS LLC $42,485,076 5.44% 1,609,893
ADAGE CAPITAL PARTNERS GP, L.L.C. $42,224,000 5.41% 1,600,000
VANGUARD CAPITAL MANAGEMENT LLC $36,668,298 4.70% 1,389,477
Spruce Street Capital LP $35,706,910 4.58% 1,353,047
Vivo Capital, LLC $31,901,762 4.09% 1,208,858
FRANKLIN RESOURCES INC $26,741,171 3.43% 1,013,307
ARMISTICE CAPITAL, LLC $22,800,960 2.92% 864,000
Affinity Asset Advisors, LLC $22,431,500 2.87% 850,000
Vestal Point Capital, LP $20,716,150 2.65% 785,000
STATE STREET CORP $18,102,088 2.32% 685,945
GEODE CAPITAL MANAGEMENT, LLC $17,897,671 2.29% 678,199
72 Investment Holdings, LLC $17,622,661 2.26% 667,778
NORTHERN TRUST CORP $16,696,977 2.14% 632,701
MILLENNIUM MANAGEMENT LLC $14,734,064 1.89% 558,320
Point72 Asset Management, L.P. $13,272,850 1.70% 502,950
Venrock Adviser, LLC $13,195,000 1.69% 500,000
Integral Health Asset Management, LLC $13,195,000 1.69% 500,000
Driehaus Capital Management LLC $12,867,130 1.65% 487,576
Parkman Healthcare Partners LLC $11,322,233 1.45% 429,035
Ikarian Capital, LLC $10,749,649 1.38% 407,338
PRICE T ROWE ASSOCIATES INC /MD/ $9,454,982 1.21% 358,279
ORBIMED ADVISORS LLC $6,804,714 0.87% 257,852
Schonfeld Strategic Advisors LLC $6,798,882 0.87% 257,631
GOLDMAN SACHS GROUP INC $6,249,942 0.80% 236,830
MARSHALL WACE, LLP $5,951,023 0.76% 225,503
VANGUARD FIDUCIARY TRUST CO $5,575,072 0.71% 211,257
AMERIPRISE FINANCIAL INC $5,040,384 0.65% 190,996
Saturn V Capital Management LP $4,824,857 0.62% 182,829
VANGUARD PORTFOLIO MANAGEMENT LLC $4,779,255 0.61% 181,101
TWO SIGMA INVESTMENTS, LP $3,887,220 0.50% 147,299
Eversept Partners, LP $3,385,467 0.43% 128,286
BOOTHBAY FUND MANAGEMENT, LLC $2,803,515 0.36% 106,234
ALKEON CAPITAL MANAGEMENT LLC $2,694,445 0.35% 102,101
STIFEL FINANCIAL CORP $2,255,817 0.29% 85,480
CHARLES SCHWAB INVESTMENT MANAGEMENT INC $2,126,585 0.27% 80,583
AWM Investment Company, Inc. $2,111,200 0.27% 80,000
Bank of New York Mellon Corp $2,014,347 0.26% 76,330
MORGAN STANLEY $1,977,665 0.25% 74,940
RENAISSANCE TECHNOLOGIES LLC $1,884,219 0.24% 71,399
WELLINGTON MANAGEMENT GROUP LLP $1,871,393 0.24% 70,913
AdvisorShares Investments LLC $1,867,039 0.24% 70,748
Nuveen, LLC $1,645,204 0.21% 62,342
UBS Group AG $1,549,013 0.20% 58,697
ACADIAN ASSET MANAGEMENT LLC $1,464,882 0.19% 55,509
BRIDGEWAY CAPITAL MANAGEMENT, LLC $1,336,732 0.17% 50,653
XTX Topco Ltd $1,229,800 0.16% 46,601
TD Asset Management Inc $1,155,882 0.15% 43,800
DIMENSIONAL FUND ADVISORS LP $1,123,184 0.14% 42,561
Quantinno Capital Management LP $1,017,492 0.13% 38,556
ALPS ADVISORS INC $939,827 0.12% 35,613
SUSQUEHANNA INTERNATIONAL GROUP, LLP $881,426 0.11% 33,400
RHUMBLINE ADVISERS $834,874 0.11% 31,636
MANUFACTURERS LIFE INSURANCE COMPANY, THE $797,848 0.10% 30,233
SUSQUEHANNA INTERNATIONAL GROUP, LLP $736,281 0.09% 27,900
ALLIANCEBERNSTEIN L.P. $720,447 0.09% 27,300
AMERICAN CENTURY COMPANIES INC $707,779 0.09% 26,820
WELLS FARGO & COMPANY/MN $694,135 0.09% 26,303
DEUTSCHE BANK AG\ $687,485 0.09% 26,051
Allianz Asset Management GmbH $686,140 0.09% 26,000
BROWN ADVISORY INC $659,750 0.08% 25,000
JANE STREET GROUP, LLC $622,804 0.08% 23,600
UNIVERSITY OF TEXAS/TEXAS AM INVESTMENT MANAGEMENT CO $585,198 0.07% 22,175
Squarepoint Ops LLC $561,737 0.07% 21,286
CITIGROUP INC $547,460 0.07% 20,745
BANK OF AMERICA CORP /DE/ $504,075 0.06% 19,101
SCS Capital Management LLC $444,407 0.06% 16,840
MetLife Investment Management, LLC $412,845 0.05% 15,644
Virtus Investment Advisers, LLC $402,157 0.05% 15,239
CITADEL ADVISORS LLC $398,489 0.05% 15,100
BANK OF NOVA SCOTIA $380,016 0.05% 14,400
Invesco Ltd. $376,188 0.05% 14,255
BARCLAYS PLC $351,461 0.05% 13,318
Vanguard Personalized Indexing Management, LLC $334,044 0.04% 12,658
Revisor Wealth Management LLC $331,890 0.04% 13,000
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. $316,917 0.04% 12,009
BANK OF MONTREAL /CAN/ $301,240 0.04% 11,415
JPMORGAN CHASE & CO $287,755 0.04% 10,904
Vanguard Global Advisers, LLC $281,027 0.04% 10,649
NEW YORK STATE COMMON RETIREMENT FUND $242,788 0.03% 9,200
SUSQUEHANNA INTERNATIONAL GROUP, LLP $211,067 0.03% 7,998
IEQ CAPITAL, LLC $210,803 0.03% 7,988
PROFUND ADVISORS LLC $208,692 0.03% 7,908
Police & Firemen's Retirement System of New Jersey $203,862 0.03% 7,725
Persistent Asset Partners Ltd $203,150 0.03% 7,698
State of Wyoming $202,780 0.03% 7,684
FMR LLC $166,916 0.02% 6,325
GK Wealth Management LLC $165,945 0.02% 6,500
Farther Finance Advisors, LLC $136,713 0.02% 5,355
BNP PARIBAS ARBITRAGE, SA $102,393 0.01% 3,880
ROYAL BANK OF CANADA $94,344 0.01% 3,575
Legal & General Group Plc $67,109 0.01% 2,543
WHITTIER TRUST CO OF NEVADA INC $65,499 0.01% 2,482
Russell Investments Group, Ltd. $63,335 0.01% 2,400
Ameritas Investment Partners, Inc. $62,729 0.01% 2,377
Tower Research Capital LLC (TRC) $52,673 0.01% 1,996
PNC FINANCIAL SERVICES GROUP, INC. $31,666 0.00% 1,200
Sterling Capital Management LLC $26,908 0.00% 1,054

Showing the top 100 of 121 holders. Create a free account to see every holder, past quarters, search, filters and CSV export.

Key facts CIK 1999480 CUSIP 02157Q109 13F (30d) 10 filings 10 filers Visit website Investor relations