BCYC · Bicycle Therapeutics PLC · Shareholders & Ownership

$3.60 +0.07 (+1.84%) At close · Oct 20

Market Cap

$249.92M

69.81M

Volume · Oct 20 488.1K Avg daily vol (3M) 399.95K

Every disclosed holder of BCYC in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.

How the holder list picks a filing →

Who Owns BCYC

13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positions

Holder group	Holders	Shares	% Out	Summed
Institutional (13F)	101	37,130,271	53.05%	Yes
Insiders (Forms 3, 4, 5)	0	0	0.00%	No
13D/G-only blocks	5	10,901,858	15.58%	Yes
Remaining	—	21,960,742	31.38%	Rest
Registered funds (N-PORT, not summed)	20	1,512,862	2.16%	No

Shares outstanding: 69,992,871, the issuer's latest cover-page count restated onto today's split basis.

Insiders are listed but not summed: the issuer has more than one class of common stock and Forms 3, 4 and 5 report one issuer-wide balance across them.

13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.

Holders of BCYC

One row per holder Every filing By ultimate parent

All 13F Funds Insiders 13D/G Non-US

#	Holder	Shares	% Out	Change	As of	Notes
1	BAKER BROS. ADVISORS LP 13F CIK 1263508 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	10,885,357	15.55%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
1.1	BAKER BROS. ADVISORS LP Insider CIK 1263508 · Jan 2, 2026 Director, 10% Owner, issuer-wide, not summed	10,018,674	14.31%	—	Jan 2, 2026	Director, 10% Owner, issuer-wide, not summed
2	FCPM III SERVICES B.V. 13F CIK 2013410 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	3,468,430	4.96%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
3	Forbion Growth Opportunities Fund II Cooperatief U.A. 13G CIK 1936623 · Unknown · Nov 21, 2024 Rule 13d-1(c), passive investor	3,452,330	4.93%	—	Nov 21, 2024	Rule 13d-1(c), passive investor
4	ARMISTICE CAPITAL, LLC 13F CIK 1601086 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	3,398,000	4.85%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
4.1	ARMISTICE CAPITAL, LLC 13G CIK 1601086 · Registered investment adviser · Jun 30, 2026 Rule 13d-1(b), qualified institution, not summed	3,398,000	4.85%	+162,000	Jun 30, 2026	Rule 13d-1(b), qualified institution, not summed
5	Long Focus Capital Management, LLC 13F CIK 1602716 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	3,310,687	4.73%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
6	Invus Public Equities, L.P. 13G CIK 2005369 · Unknown · Feb 25, 2026 Rule 13d-1(c), passive investor	3,149,049	4.50%	—	Feb 25, 2026	Rule 13d-1(c), passive investor
7	RA CAPITAL MANAGEMENT, L.P. 13G CIK 1346824 · Registered investment adviser · Sep 30, 2024 Rule 13d-1(c), passive investor	2,253,000	3.22%	0	Sep 30, 2024	Rule 13d-1(c), passive investor
8	ACADIAN ASSET MANAGEMENT LLC 13F CIK 916542 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	1,968,025	2.81%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
9	RENAISSANCE TECHNOLOGIES LLC 13F CIK 1037389 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,533,400	2.19%	+554,100	Jun 30, 2026	carried, not yet filed for the newest quarter
10	GSK plc 13F CIK 1131399 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	1,529,561	2.19%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
11	Deep Track Capital, LP 13G CIK 1856083 · Investment adviser · Jun 30, 2025 Rule 13d-1(c), passive investor	1,203,244	1.72%	-1,617,927	Jun 30, 2025	Rule 13d-1(c), passive investor
12	PRICE T ROWE ASSOCIATES INC /MD/ 13F CIK 80255 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	902,150	1.29%	-126,093	Jun 30, 2026	carried, not yet filed for the newest quarter
12.1	T. Rowe Price Health Sciences Fund, Inc. Fund S000002088 · Registered fund · Jun 30, 2026 T. ROWE PRICE HEALTH SCIENCES FUND, INC., not summed	628,421	0.90%	-110,830	Jun 30, 2026	T. ROWE PRICE HEALTH SCIENCES FUND, INC., not summed
12.2	T. Rowe Price Health Sciences Portfolio Fund S000002083 · Registered fund · Jun 30, 2026 T. ROWE PRICE EQUITY SERIES, INC., not summed	62,846	0.09%	0	Jun 30, 2026	T. ROWE PRICE EQUITY SERIES, INC., not summed
13	Ridgeback Capital Investments L.P. 13G CIK 1423994 · Unknown · Dec 31, 2023 Rule 13d-1(c), passive investor	844,235	1.21%	—	Dec 31, 2023	Rule 13d-1(c), passive investor
14	MARSHALL WACE, LLP 13F CIK 1318757 · Exempt reporting adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	797,940	1.14%	+420,605	Jun 30, 2026	carried, not yet filed for the newest quarter
15	Qube Research & Technologies Ltd 13F CIK 1729829 · Exempt reporting adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	775,567	1.11%	+466,950	Jun 30, 2026	carried, not yet filed for the newest quarter
16	MORGAN STANLEY 13F CIK 895421 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	667,269	0.95%	+48,942	Jun 30, 2026	carried, not yet filed for the newest quarter
17	SCHRODER INVESTMENT MANAGEMENT GROUP 13F CIK 1086619 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	615,833	0.88%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
18	Lee Kevin Insider CIK 1776938 · Oct 5, 2026 Director, CHIEF EXECUTIVE OFFICER, issuer-wide, not summed	595,866	0.85%	-7,805	Oct 5, 2026	Director, CHIEF EXECUTIVE OFFICER, issuer-wide, not summed
19	CITADEL ADVISORS LLC 13F CIK 1423053 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	554,225	0.79%	+177,140	Jun 30, 2026	carried, not yet filed for the newest quarter
20	MILLENNIUM MANAGEMENT LLC 13F CIK 1273087 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	553,967	0.79%	+269,981	Jun 30, 2026	carried, not yet filed for the newest quarter
21	Peapod Lane Capital LLC 13F CIK 2050979 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	537,978	0.77%	+416,872	Jun 30, 2026	carried, not yet filed for the newest quarter
22	DIADEMA PARTNERS LP 13F CIK 2026172 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	462,724	0.66%	-13,700	Jun 30, 2026	carried, not yet filed for the newest quarter
23	TWO SIGMA INVESTMENTS, LP 13F CIK 1179392 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	434,577	0.62%	+269,777	Jun 30, 2026	carried, not yet filed for the newest quarter
24	JANE STREET GROUP, LLC 13F CIK 1595888 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	392,163	0.56%	+174,048	Jun 30, 2026	carried, not yet filed for the newest quarter
25	Birchview Capital, LP 13F CIK 1618205 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	313,616	0.45%	-149,983	Jun 30, 2026	carried, not yet filed for the newest quarter
26	BlackRock, Inc. 13F CIK 2012383 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	280,386	0.40%	+1,394	Jun 30, 2026	carried, not yet filed for the newest quarter
26.1	iShares Biotechnology ETF Fund S000004350 · Registered fund · Jun 30, 2026 iShares Trust, not summed	242,577	0.35%	-1,524	Jun 30, 2026	iShares Trust, not summed
27	MOORE CAPITAL MANAGEMENT, LP 13F CIK 1448574 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	275,000	0.39%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
28	Old Westbury Small & Mid Cap Strategies Fund Fund S000001857 · Registered fund · Jul 31, 2026 Old Westbury Funds Inc, not summed	265,973	0.38%	0	Jul 31, 2026	Old Westbury Funds Inc, not summed
29	Rangeley Capital, LLC 13F CIK 1517796 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	253,500	0.36%	+21,240	Jun 30, 2026	carried, not yet filed for the newest quarter
30	Palo Alto Investors LP 13F CIK 1306923 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	201,890	0.29%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
31	Sculptor Capital LP 13F CIK 1054587 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	197,904	0.28%	+197,904	Jun 30, 2026	carried, not yet filed for the newest quarter
32	Winter Gregory Paul Insider CIK 1777021 · Jan 2, 2026 Director, issuer-wide, not summed	196,427	0.28%	+9,500	Jan 2, 2026	Director, issuer-wide, not summed
33	Eversept Partners, LP 13F CIK 1697013 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	190,715	0.27%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
34	FLAX POND CAPITAL, LLC 13F CIK 2106996 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	180,086	0.26%	+3,950	Jun 30, 2026	carried, not yet filed for the newest quarter
35	Jump Financial, LLC 13F CIK 1831577 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	167,100	0.24%	+114,556	Jun 30, 2026	carried, not yet filed for the newest quarter
36	PINNACLE ASSOCIATES LTD 13F CIK 743127 · Registered investment adviser · Sep 30, 2026	160,551	0.23%	-29,439	Sep 30, 2026
37	Skynner Michael Insider CIK 1776582 · Oct 5, 2026 CHIEF TECHNOLOGY OFFICER, issuer-wide, not summed	154,726	0.22%	-2,445	Oct 5, 2026	CHIEF TECHNOLOGY OFFICER, issuer-wide, not summed
38	Point72 Asset Management, L.P. 13F CIK 1603466 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	149,936	0.21%	+19,514	Jun 30, 2026	carried, not yet filed for the newest quarter
39	Milnes Alistair Insider CIK 1901321 · Jan 5, 2026 CHIEF OPERATING OFFICER, issuer-wide, not summed	136,717	0.20%	+43,340	Jan 5, 2026	CHIEF OPERATING OFFICER, issuer-wide, not summed
40	MANUFACTURERS LIFE INSURANCE COMPANY, THE 13F CIK 928047 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	127,863	0.18%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
41	GOLDMAN SACHS GROUP INC 13F CIK 886982 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	121,281	0.17%	+11,134	Jun 30, 2026	carried, not yet filed for the newest quarter
42	Persistent Asset Partners Ltd 13F CIK 2056052 · Exempt reporting adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	117,254	0.17%	-3,183	Jun 30, 2026	carried, not yet filed for the newest quarter
43	XTX Topco Ltd 13F CIK 1828301 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	109,801	0.16%	+3,409	Jun 30, 2026	carried, not yet filed for the newest quarter
44	Quadrature Capital Ltd 13F CIK 1651424 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	104,092	0.15%	+104,092	Jun 30, 2026	carried, not yet filed for the newest quarter
45	Hannay Michael Charles Ferguson Insider CIK 2015378 · Oct 5, 2026 CHIEF PROD & SUPPLY CHAIN OFF, issuer-wide, not summed	92,561	0.13%	-1,814	Oct 5, 2026	CHIEF PROD & SUPPLY CHAIN OFF, issuer-wide, not summed
46	TD Asset Management Inc 13F CIK 1056053 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	91,992	0.13%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
47	Perry Jennifer Scott Insider CIK 2119908 · Oct 5, 2026 Chief Operating Officer, issuer-wide, not summed	89,602	0.13%	-1,450	Oct 5, 2026	Chief Operating Officer, issuer-wide, not summed
48	Young Alethia Insider CIK 1918147 · Jan 5, 2026 Chief Financial Officer, issuer-wide, not summed	87,081	0.12%	+42,377	Jan 5, 2026	Chief Financial Officer, issuer-wide, not summed
49	Virtus Investment Advisers, LLC 13F CIK 19481 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	80,789	0.12%	+44,188	Jun 30, 2026	carried, not yet filed for the newest quarter
49.1	Virtus Biotech Clinical Trials Etf Fund S000047353 · Registered fund · Jul 31, 2026 ETFis Series Trust I, not summed	76,743	0.11%	+39,696	Jul 31, 2026	ETFis Series Trust I, not summed
50	NANO CAP NEW MILLENNIUM GROWTH FUND L P 13F CIK 1277890 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	80,000	0.11%	+80,000	Jun 30, 2026	carried, not yet filed for the newest quarter

Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.

Showing 1–50 of 137 holders

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Key facts CIK 1761612 CUSIP 088786108 13F (30d) 5 filings 5 filers Visit website Investor relations