Alto Neuroscience, Inc.
Alto Neuroscience, Inc. (ANRO) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · ANRO · as of Sep 30, 2025
Ownership Breakdown
77
Institutional Holders
▼ 4 vs Q2
$67.38M
Total Inst. Value
▲ $29.33M vs Q2
35.09M
Shares Outstanding
freeFloat 89.45%
16.76M
13F Shares Held
▼ 538,645 vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
ANRO largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
ALPHA WAVE GLOBAL, LP pharmaceutical preparations | 3.71M | 13.70% | 13.70% | $14.91B | Nov 13, 2025 | — held |
ARMISTICE CAPITAL, LLC pharmaceutical preparations | 1.64M | 6.04% | 6.04% | $6.58B | Nov 17, 2025 | ▲ 12.0K |
POINT72 ASSET MANAGEMENT, L.P. pharmaceutical preparations | 1.33M | 4.92% | 4.92% | $5.36B | Nov 14, 2025 | ▲ 2.7K |
FRANKLIN RESOURCES INC pharmaceutical preparations | 1.16M | 4.29% | 4.29% | $4.67B | Nov 13, 2025 | — held |
VANGUARD GROUP INC pharmaceutical preparations | 1.11M | 4.08% | 4.08% | $4.44B | Nov 7, 2025 | ▲ 20.7K |
VESTAL POINT CAPITAL, LP pharmaceutical preparations | 950.0K | 3.51% | 3.51% | $3.82B | Nov 14, 2025 | — held |
MARSHALL WACE, LLP pharmaceutical preparations | 825.2K | 3.05% | 3.05% | $3.32B | Nov 13, 2025 | ▼ 112.2K |
72 INVESTMENT HOLDINGS, LLC pharmaceutical preparations | 667.8K | 2.47% | 2.47% | $2.68B | Nov 14, 2025 | — held |
ALKEON CAPITAL MANAGEMENT LLC pharmaceutical preparations | 477.1K | 1.76% | 1.76% | $1.92B | Nov 14, 2025 | — held |
NORTHERN TRUST CORP pharmaceutical preparations | 461.3K | 1.70% | 1.70% | $1.85B | Nov 14, 2025 | ▼ 2.1K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
14
Increased
+403.9K shares2
New Positions
first time holders15
Decreased
−850.4K shares0
Sold Out
fully exitedNet shares change (top 50)
446.4K
+403.9K / −850.4K
Net new holders
+1
2 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
ANRO insider trading · insider activity
Source: SEC Form 4
6
Buy transactions
1
Sell transactions
6.00
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Miller Andrew Craig director | May 27, 2026 | Award | 26,000 | $20.44 | $531.4K | 26.0K | Form 4 ↗ |
Etkin Amit PRESIDENT AND CEO | May 14, 2026 | Gift | 400,000 | — | — | 833.9K | Form 4 ↗ |
Sanchez Ramiro director | May 12, 2026 | Award | 10,958 | $24.63 | $269.9K | 11.0K | Form 4 ↗ |
Cox Christopher Nixon director | May 12, 2026 | Award | 10,958 | $24.63 | $269.9K | 11.0K | Form 4 ↗ |
Manji Husseini director | May 12, 2026 | Award | 10,958 | $24.63 | $269.9K | 11.0K | Form 4 ↗ |
Dreyfus Andrew director | May 12, 2026 | Award | 10,958 | $24.63 | $269.9K | 11.0K | Form 4 ↗ |
York Gwill director | May 12, 2026 | Award | 10,958 | $24.63 | $269.9K | 11.0K | Form 4 ↗ |
Etkin Amit PRESIDENT AND CEO | Mar 1, 2026 | Tax Withhold | 6,227 | $19.69 | $122.6K | 1.23M | Form 4 ↗ |
Smith Nicholas Conrad CHIEF FINANCIAL OFFICER & CBO | Mar 1, 2026 | Tax Withhold | 2,806 | $19.69 | $55.3K | 24.1K | Form 4 ↗ |
Etkin Amit PRESIDENT AND CEO | Feb 11, 2026 | Award | 306,000 | $16.71 | $5.11M | 306.0K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Alto Neuroscience, Inc. (ANRO) is primarily owned by institutional investors, who hold approximately 47.8% of total shares outstanding. Company insiders own approximately 10.55%, while retail and public investors account for the remaining 41.70%.
The largest institutional shareholder of Alto Neuroscience, Inc. is ALPHA WAVE GLOBAL, LP, holding approximately 3.71 million shares — equal to 13.70% of outstanding shares — as of September 30, 2025.
A total of 77 institutional investors currently hold ANRO stock, with a combined institutional value of approximately $67,376,718 as of the most recent 13F filing period.
Frequently asked questions
ANRO ownershipAlto Neuroscience, Inc. (ANRO) is primarily owned by institutional investors, who hold approximately 47.8% of shares. The largest shareholder is ALPHA WAVE GLOBAL, LP with a 13.70% stake. Company insiders hold 10.55%. Data sourced from SEC Form 13F as of September 30, 2025.