There is a long list of 99 institutional holders of BCYC within the last two holding periods in our database of 13F filers, so we've sorted through to present to you just the top 50 institutional holders of BCYC by largest to smallest position reported in the institutional investor's latest 13F filing. In the institutional-holders-of-BCYC table below, the initial column indicates the name of each top institutional holder of BCYC, with a link to that fund's top holdings. The next columns indicate the amount of BCYC stock held by each of the institutional holders of BCYC, followed by the BCYC position size held by the institution, and finally the date of the quarterly 13F filing period the holdings data represents for that institution.

Holder	Amount	Position Size ($ in 1000's)	As of
Paradigm Biocapital Advisors LP	3,707,001	$67,023	12/31/2023
BCYC	3,707,001	$67,023	12/31/2023
Deep Track Capital LP	3,490,506	$63,108	12/31/2023
BCYC	3,490,506	$63,108	12/31/2023
Jefferies Financial Group Inc.	1,948,000	$35,220	12/31/2023
BCYC	1,948,000	$35,220	12/31/2023
Baker BROS. Advisors LP	1,790,390	$32,370	12/31/2023
BCYC	1,790,390	$32,370	12/31/2023
Tybourne Capital Management HK Ltd.	1,650,320	$29,838	12/31/2023
BCYC	1,650,320	$29,838	12/31/2023
First Light Asset Management LLC	1,550,471	$28,033	12/31/2023
BCYC	1,550,471	$28,033	12/31/2023
Armistice Capital LLC	1,536,000	$27,771	12/31/2023
BCYC	1,536,000	$27,771	12/31/2023
Morgan Stanley	1,029,225	$18,608	12/31/2023
BCYC	1,029,225	$18,608	12/31/2023
Polar Capital Holdings Plc	1,004,535	$18,162	12/31/2023
BCYC	1,004,535	$18,162	12/31/2023
Westfield Capital Management Co. LP	917,304	$16,585	12/31/2023
BCYC	917,304	$16,585	12/31/2023
Suvretta Capital Management LLC	914,476	$16,534	12/31/2023
BCYC	914,476	$16,534	12/31/2023
Candriam Luxembourg S.C.A.	869,258	$15,717	12/31/2023
BCYC	869,258	$15,717	12/31/2023
Ridgeback Capital Investments L.P.	844,235	$15,264	12/31/2023
BCYC	844,235	$15,264	12/31/2023
RA Capital Management L.P.	800,000	$14,464	12/31/2023
BCYC	800,000	$14,464	12/31/2023
BNP PARIBAS ASSET MANAGEMENT Holding S.A.	782,998	$14,157	12/31/2023
BCYC	782,998	$14,157	12/31/2023
Verition Fund Management LLC	740,539	$13,389	12/31/2023
BCYC	740,539	$13,389	12/31/2023
AXA S.A.	554,086	$10,018	12/31/2023
BCYC	554,086	$10,018	12/31/2023
BlackRock Inc.	501,623	$9,069	12/31/2023
BCYC	501,623	$9,069	12/31/2023
Bank of America Corp DE	461,331	$8,341	12/31/2023
BCYC	461,331	$8,341	12/31/2023
Camber Capital Management LP	450,000	$8,136	12/31/2023
BCYC	450,000	$8,136	12/31/2023
Kennedy Capital Management Inc.	416,485	$7,530	12/31/2023
BCYC	416,485	$7,530	12/31/2023
Nomura Holdings Inc.	400,000	$7,232	12/31/2023
BCYC	400,000	$7,232	12/31/2023
Platinum Investment Management Ltd.	362,080	$6,546	12/31/2023
BCYC	362,080	$6,546	12/31/2023
Parkman Healthcare Partners LLC	312,889	$5,657	12/31/2023
BCYC	312,889	$5,657	12/31/2023
Citadel Advisors LLC		$5,254	12/31/2023
BCYC	294,465	$5,324	12/31/2023
Put	16,100	$291	12/31/2023
Call	12,200	$221	12/31/2023
Price T Rowe Associates Inc. MD	276,837	$5,006	12/31/2023
BCYC	276,837	$5,006	12/31/2023
FMR LLC	266,347	$4,816	12/31/2023
BCYC	266,347	$4,816	12/31/2023
Millennium Management LLC	249,135	$4,504	12/31/2023
BCYC	249,135	$4,504	12/31/2023
Point72 Asset Management L.P.	225,895	$4,084	12/31/2023
BCYC	225,895	$4,084	12/31/2023
Rubric Capital Management LP	205,423	$3,714	12/31/2023
BCYC	205,423	$3,714	12/31/2023
Trexquant Investment LP	196,323	$3,550	12/31/2023
BCYC	196,323	$3,550	12/31/2023
Jane Street Group LLC		$3,181	12/31/2023
Call	93,000	$1,681	12/31/2023
BCYC	82,950	$1,500	12/31/2023
Man Group plc	174,074	$3,147	12/31/2023
BCYC	174,074	$3,147	12/31/2023
HighVista Strategies LLC	158,293	$2,862	12/31/2023
BCYC	158,293	$2,862	12/31/2023
Walleye Capital LLC	150,126	$2,714	12/31/2023
BCYC	150,126	$2,714	12/31/2023
Handelsbanken Fonder AB	139,800	$2,528	12/31/2023
BCYC	139,800	$2,528	12/31/2023
Legal & General Group Plc	132,805	$2,400	12/31/2023
BCYC	132,805	$2,400	12/31/2023
DAFNA Capital Management LLC	122,200	$2,209	12/31/2023
BCYC	122,200	$2,209	12/31/2023
Cubist Systematic Strategies LLC	113,901	$2,059	12/31/2023
BCYC	113,901	$2,059	12/31/2023
Voya Investment Management LLC	113,150	$2,046	12/31/2023
BCYC	113,150	$2,046	12/31/2023
Schonfeld Strategic Advisors LLC	107,000	$1,935	12/31/2023
BCYC	107,000	$1,935	12/31/2023
Renaissance Technologies LLC	105,500	$1,907	12/31/2023
BCYC	105,500	$1,907	12/31/2023
Two Sigma Investments LP	103,628	$1,874	12/31/2023
BCYC	103,628	$1,874	12/31/2023
Soleus Capital Management L.P.	95,000	$1,718	12/31/2023
BCYC	95,000	$1,718	12/31/2023
UBS Oconnor LLC		$1,557	12/31/2023
BCYC	73,601	$1,331	12/31/2023
Call	125,000	$226	12/31/2023
Comerica Bank	81,850	$1,480	12/31/2023
BCYC	81,850	$1,480	12/31/2023
Jump Financial LLC	77,332	$1,398	12/31/2023
BCYC	77,332	$1,398	12/31/2023
Two Sigma Advisers LP	62,207	$1,125	12/31/2023
BCYC	62,207	$1,125	12/31/2023
Walleye Trading LLC	50,241	$908	12/31/2023
BCYC	50,241	$908	12/31/2023
BNP Paribas Arbitrage SA	36,851	$666	12/31/2023
BCYC	36,851	$666	12/31/2023