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 Mar 31, 2025
Ownership Breakdown
86
Institutional Holders
▲ 5 vs Q4
$45.03M
Total Inst. Value
▼ $50.27M vs Q4
35.09M
Shares Outstanding
freeFloat 89.45%
20.85M
13F Shares Held
▼ 1.68M vs Q4
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
Q1 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
ALPHA WAVE GLOBAL, LP pharmaceutical preparations | 3.71M | 13.71% | 13.71% | $8.01B | May 14, 2025 | — held |
ARMISTICE CAPITAL, LLC pharmaceutical preparations | 1.60M | 5.92% | 5.92% | $3.46B | May 15, 2025 | ▲ 950.0K |
BLACKROCK, INC. pharmaceutical preparations | 1.46M | 5.39% | 5.39% | $3.15B | May 2, 2025 | ▼ 20.8K |
FMR LLC pharmaceutical preparations | 1.27M | 4.71% | 4.71% | $2.75B | May 12, 2025 | ▲ 7.1K |
POINT72 ASSET MANAGEMENT, L.P. pharmaceutical preparations | 1.24M | 4.58% | 4.58% | $2.68B | Jul 21, 2025 | ▼ 452.1K |
VANGUARD GROUP INC pharmaceutical preparations | 1.22M | 4.51% | 4.51% | $2.63B | May 9, 2025 | ▼ 11.0K |
FRANKLIN RESOURCES INC pharmaceutical preparations | 1.16M | 4.30% | 4.30% | $2.51B | May 13, 2025 | — held |
VESTAL POINT CAPITAL, LP pharmaceutical preparations | 915.0K | 3.38% | 3.38% | $1.98B | May 15, 2025 | — held |
AWM INVESTMENT COMPANY, INC. pharmaceutical preparations | 902.0K | 3.33% | 3.33% | $1.95B | May 15, 2025 | ▲ 214.2K |
MARSHALL WACE, LLP pharmaceutical preparations | 853.0K | 3.15% | 3.15% | $1.84B | May 15, 2025 | ▲ 15.6K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q1 2025 vs prior quarter
Q1 2025
11
Increased
+1.42M shares9
New Positions
first time holders20
Decreased
−2.84M shares0
Sold Out
fully exitedNet shares change (top 50)
1.42M
+1.42M / −2.84M
Net new holders
+0
9 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 59.4% of total shares outstanding. Company insiders own approximately 10.55%, while retail and public investors account for the remaining 30.05%.
The largest institutional shareholder of Alto Neuroscience, Inc. is ALPHA WAVE GLOBAL, LP, holding approximately 3.71 million shares — equal to 13.71% of outstanding shares — as of March 31, 2025.
A total of 86 institutional investors currently hold ANRO stock, with a combined institutional value of approximately $45,027,318 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 59.4% of shares. The largest shareholder is ALPHA WAVE GLOBAL, LP with a 13.71% stake. Company insiders hold 10.55%. Data sourced from SEC Form 13F as of March 31, 2025.