COMPASS Pathways plc
COMPASS Pathways plc (CMPS) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · CMPS · as of Sep 30, 2025
Ownership Breakdown
174
Institutional Holders
▲ 20 vs Q2
$317.96M
Total Inst. Value
▲ $172.82M vs Q2
96.09M
Shares Outstanding
freeFloat 97.32%
55.48M
13F Shares Held
▲ 3.73M 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
CMPS largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
RTW INVESTMENTS, LP pharmaceutical preparations | 8.71M | 9.33% | 9.33% | $49.89B | Nov 14, 2025 | ▲ 485.5K |
DEEP TRACK CAPITAL, LP pharmaceutical preparations | 7.86M | 8.42% | 8.42% | $45.04B | Nov 14, 2025 | ▼ 971.4K |
GMT CAPITAL CORP pharmaceutical preparations | 2.84M | 3.05% | 3.05% | $16.30B | Nov 14, 2025 | ▲ 1.06M |
MILLENNIUM MANAGEMENT LLC pharmaceutical preparations | 2.72M | 2.91% | 2.91% | $15.56B | Nov 14, 2025 | ▲ 974.1K |
TANG CAPITAL MANAGEMENT LLC pharmaceutical preparations | 2.20M | 2.36% | 2.36% | $12.61B | Nov 14, 2025 | ▲ 900.0K |
UBS GROUP AG pharmaceutical preparations | 2.14M | 2.30% | 2.30% | $12.29B | Nov 13, 2025 | ▲ 465.8K |
ARK INVESTMENT MANAGEMENT LLC pharmaceutical preparations | 2.12M | 2.27% | 2.27% | $12.15B | Nov 12, 2025 | ▲ 471.9K |
NANTAHALA CAPITAL MANAGEMENT, LLC pharmaceutical preparations | 1.73M | 1.85% | 1.85% | $9.91B | Nov 14, 2025 | ▼ 2.45M |
PFM HEALTH SCIENCES, LP pharmaceutical preparations | 1.66M | 1.78% | 1.78% | $9.53B | Nov 14, 2025 | ▼ 116.4K |
JEFFERIES FINANCIAL GROUP INC. pharmaceutical preparations | 1.38M | 1.48% | 1.48% | $7.89B | Nov 13, 2025 | NEW |
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
24
Increased
+9.88M shares14
New Positions
first time holders8
Decreased
−5.12M shares0
Sold Out
fully exitedNet shares change (top 50)
+4.75M
+9.88M / −5.12M
Net new holders
+30
14 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
CMPS insider trading · insider activity
Source: SEC Form 4
8
Buy transactions
0
Sell transactions
0.00
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 |
|---|---|---|---|---|---|---|---|
Karydas Daphne director | May 27, 2026 | Award | 21,110 | $11.85 | $250.2K | 21.1K | Form 4 ↗ |
SANTINI GINO director | May 27, 2026 | Award | 30,158 | $11.85 | $357.4K | 30.2K | Form 4 ↗ |
Gover Justin D. director | May 27, 2026 | Award | 21,110 | $11.85 | $250.2K | 21.1K | Form 4 ↗ |
JONAS JEFFREY M director | May 27, 2026 | Award | 21,110 | $11.85 | $250.2K | 21.1K | Form 4 ↗ |
Riley Wayne Joseph director | May 27, 2026 | Award | 21,110 | $11.85 | $250.2K | 21.1K | Form 4 ↗ |
McQuade Robert director | May 27, 2026 | Award | 21,110 | $11.85 | $250.2K | 21.1K | Form 4 ↗ |
Norton David Y director | May 27, 2026 | Award | 21,110 | $11.85 | $250.2K | 21.1K | Form 4 ↗ |
Tregoning Kathleen director | May 27, 2026 | Award | 41,119 | $11.85 | $487.3K | 41.1K | Form 4 ↗ |
Nath Kabir Chief Executive Officer | Mar 26, 2026 | Award | 367,815 | $5.64 | $2.07M | 367.8K | Form 4 ↗ |
Nath Kabir Chief Executive Officer | Mar 26, 2026 | Award | 175,000 | — | — | 367.0K | 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
COMPASS Pathways plc (CMPS) is primarily owned by institutional investors, who hold approximately 57.7% of total shares outstanding. Company insiders own approximately 2.68%, while retail and public investors account for the remaining 39.58%.
The largest institutional shareholder of COMPASS Pathways plc is RTW INVESTMENTS, LP, holding approximately 8.71 million shares — equal to 9.33% of outstanding shares — as of September 30, 2025.
A total of 174 institutional investors currently hold CMPS stock, with a combined institutional value of approximately $317,957,932 as of the most recent 13F filing period.
Frequently asked questions
CMPS ownershipCOMPASS Pathways plc (CMPS) is primarily owned by institutional investors, who hold approximately 57.7% of shares. The largest shareholder is RTW INVESTMENTS, LP with a 9.33% stake. Company insiders hold 2.68%. Data sourced from SEC Form 13F as of September 30, 2025.