Bicycle Therapeutics plc
Bicycle Therapeutics plc (BCYC) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · BCYC · as of Sep 30, 2025
Ownership Breakdown
103
Institutional Holders
▼ 14 vs Q2
$285.62M
Total Inst. Value
▼ $718,857 vs Q2
69.39M
Shares Outstanding
freeFloat 88.59%
36.91M
13F Shares Held
▼ 4.29M 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
BCYC largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
BAKER BROS. ADVISORS LP pharmaceutical preparations | 10.89M | 15.72% | 15.72% | $84.25B | Nov 14, 2025 | — held |
FCPM III SERVICES B.V. pharmaceutical preparations | 3.45M | 4.99% | 4.99% | $26.72B | Nov 14, 2025 | — held |
ARMISTICE CAPITAL, LLC pharmaceutical preparations | 2.98M | 4.30% | 4.30% | $23.05B | Nov 17, 2025 | ▲ 178.0K |
WESTFIELD CAPITAL MANAGEMENT CO LP pharmaceutical preparations | 2.95M | 4.26% | 4.26% | $22.85B | Nov 12, 2025 | ▲ 172.1K |
SIREN, L.L.C. pharmaceutical preparations | 2.01M | 2.91% | 2.91% | $15.58B | Nov 13, 2025 | — held |
LONG FOCUS CAPITAL MANAGEMENT, LLC pharmaceutical preparations | 1.42M | 2.05% | 2.05% | $10.98B | Nov 14, 2025 | ▲ 101.4K |
PRICE T ROWE ASSOCIATES INC /MD/ pharmaceutical preparations | 1.38M | 2.00% | 2.00% | $10.72B | Nov 14, 2025 | ▼ 83.6K |
ACADIAN ASSET MANAGEMENT LLC pharmaceutical preparations | 1.31M | 1.90% | 1.90% | $10.15B | Nov 13, 2025 | ▲ 616.1K |
CANDRIAM S.C.A. pharmaceutical preparations | 1.17M | 1.69% | 1.69% | $9.07B | Nov 6, 2025 | — held |
PRINCIPAL FINANCIAL GROUP INC pharmaceutical preparations | 1.15M | 1.66% | 1.66% | $8.89B | Nov 4, 2025 | ▲ 451.1K |
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
24
Increased
+2.57M shares1
New Positions
first time holders15
Decreased
−2.65M shares0
Sold Out
fully exitedNet shares change (top 50)
89.7K
+2.57M / −2.65M
Net new holders
+10
1 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
BCYC insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
0
Buy transactions
11
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 |
|---|---|---|---|---|---|---|---|
Hannay Michael Charles Ferguson CHIEF PROD & SUPPLY CHAIN OFF | Apr 2, 2026 | Sale | 1,521 | $4.91 | $7.5K | 96.4K | Form 4 ↗ |
Hannay Michael Charles Ferguson CHIEF PROD & SUPPLY CHAIN OFF | Apr 6, 2026 | Sale | 251 | $5.05 | $1.3K | 96.1K | Form 4 ↗ |
Thompson Travis Alvin Chief Financial Officer | Apr 2, 2026 | Sale | 799 | $4.91 | $3.9K | 65.5K | Form 4 ↗ |
Thompson Travis Alvin Chief Financial Officer | Apr 6, 2026 | Sale | 102 | $5.05 | $515.1 | 65.4K | Form 4 ↗ |
Perry Jennifer Scott Chief Operating Officer | Apr 2, 2026 | Sale | 1,038 | $4.91 | $5.1K | 92.8K | Form 4 ↗ |
Perry Jennifer Scott Chief Operating Officer | Apr 6, 2026 | Sale | 37 | $5.05 | $186.85 | 92.8K | Form 4 ↗ |
Perry Jennifer Scott Chief Operating Officer | Apr 6, 2026 | Sale | 333 | $5.04 | $1.7K | 92.5K | Form 4 ↗ |
Lee Kevin CHIEF EXECUTIVE OFFICER | Apr 2, 2026 | Sale | 5,967 | $4.91 | $29.3K | 613.0K | Form 4 ↗ |
Lee Kevin CHIEF EXECUTIVE OFFICER | Apr 6, 2026 | Sale | 1,716 | $5.05 | $8.7K | 611.3K | Form 4 ↗ |
Skynner Michael CHIEF SCIENTIFIC OFFICER | Apr 2, 2026 | Sale | 1,879 | $4.91 | $9.2K | 160.1K | 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
Bicycle Therapeutics plc (BCYC) is primarily owned by institutional investors, who hold approximately 53.2% of total shares outstanding. Company insiders own approximately 11.41%, while retail and public investors account for the remaining 35.40%.
The largest institutional shareholder of Bicycle Therapeutics plc is BAKER BROS. ADVISORS LP, holding approximately 10.89 million shares — equal to 15.72% of outstanding shares — as of September 30, 2025.
A total of 103 institutional investors currently hold BCYC stock, with a combined institutional value of approximately $285,619,779 as of the most recent 13F filing period.
Frequently asked questions
BCYC ownershipBicycle Therapeutics plc (BCYC) is primarily owned by institutional investors, who hold approximately 53.2% of shares. The largest shareholder is BAKER BROS. ADVISORS LP with a 15.72% stake. Company insiders hold 11.41%. Data sourced from SEC Form 13F as of September 30, 2025.