There is a long list of 104 institutional holders of FULC 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 FULC by largest to smallest position reported in the institutional investor's latest 13F filing. In the institutional-holders-of-FULC table below, the initial column indicates the name of each top institutional holder of FULC, with a link to that fund's top holdings. The next columns indicate the amount of FULC stock held by each of the institutional holders of FULC, followed by the FULC 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
RA Capital Management L.P.	11,609,704	$78,366	12/31/2023
FULC	11,609,704	$78,366	12/31/2023
FMR LLC	5,684,615	$38,371	12/31/2023
FULC	5,684,615	$38,371	12/31/2023
Suvretta Capital Management LLC	5,518,881	$37,252	12/31/2023
FULC	5,518,881	$37,252	12/31/2023
RTW Investments LP	5,469,956	$36,922	12/31/2023
FULC	5,469,956	$36,922	12/31/2023
Cowen AND Company LLC	3,473,934	$23,449	12/31/2023
FULC	3,473,934	$23,449	12/31/2023
Vanguard Group Inc.	2,519,984	$17,010	12/31/2023
FULC	2,519,984	$17,010	12/31/2023
TRV GP IV LLC	2,343,154	$15,816	12/31/2023
FULC	2,343,154	$15,816	12/31/2023
Citadel Advisors LLC		$11,666	12/31/2023
FULC	1,403,873	$9,476	12/31/2023
Call	332,100	$2,242	12/31/2023
Put	7,700	$52	12/31/2023
BlackRock Inc.	1,561,866	$10,543	12/31/2023
FULC	1,561,866	$10,543	12/31/2023
Adage Capital Partners GP L.L.C.	1,506,422	$10,168	12/31/2023
FULC	1,506,422	$10,168	12/31/2023
Jefferies Financial Group Inc.	1,433,316	$9,675	12/31/2023
FULC	1,433,316	$9,675	12/31/2023
Morgan Stanley	1,219,059	$8,229	12/31/2023
FULC	1,219,059	$8,229	12/31/2023
Logos Global Management LP	1,200,000	$8,100	12/31/2023
FULC	1,200,000	$8,100	12/31/2023
Vestal Point Capital LP	1,025,000	$6,919	12/31/2023
FULC	1,025,000	$6,919	12/31/2023
Dimensional Fund Advisors LP	975,279	$6,584	12/31/2023
FULC	975,279	$6,584	12/31/2023
Susquehanna International Group LLP		$6,130	12/31/2023
FULC	666,593	$4,500	12/31/2023
Call	304,000	$2,052	12/31/2023
Put	62,500	$422	12/31/2023
Goldman Sachs Group Inc.	871,503	$5,883	12/31/2023
FULC	871,503	$5,883	12/31/2023
Deutsche Bank AG	823,098	$5,556	12/31/2023
FULC	823,098	$5,556	12/31/2023
Propel Bio Management LLC	750,000	$5,062	12/31/2023
FULC	750,000	$5,062	12/31/2023
Rock Springs Capital Management LP	727,673	$4,912	12/31/2023
FULC	727,673	$4,912	12/31/2023
ADAR1 Capital Management LLC	637,405	$4,302	12/31/2023
FULC	637,405	$4,302	12/31/2023
Simplify Asset Management Inc.	563,325	$3,802	12/31/2023
FULC	563,325	$3,802	12/31/2023
Geode Capital Management LLC	553,230	$3,735	12/31/2023
FULC	553,230	$3,735	12/31/2023
Marshall Wace LLP	505,102	$3,409	12/31/2023
FULC	505,102	$3,409	12/31/2023
D. E. Shaw & Co. Inc.	497,679	$3,359	12/31/2023
FULC	497,679	$3,359	12/31/2023
Two Sigma Advisers LP	496,200	$3,349	12/31/2023
FULC	496,200	$3,349	12/31/2023
Invesco Ltd.	476,206	$3,214	12/31/2023
FULC	476,206	$3,214	12/31/2023
Millennium Management LLC	437,503	$2,953	12/31/2023
FULC	437,503	$2,953	12/31/2023
Schonfeld Strategic Advisors LLC	432,533	$2,920	12/31/2023
FULC	432,533	$2,920	12/31/2023
StemPoint Capital LP	376,573	$2,542	12/31/2023
FULC	376,573	$2,542	12/31/2023
Jane Street Group LLC	346,850	$2,341	12/31/2023
FULC	346,850	$2,341	12/31/2023
Mass General Brigham Inc	205,356	$1,939	03/31/2024
FULC	205,356	$1,939	03/31/2024
Bessemer Group Inc.	286,988	$1,938	12/31/2023
FULC	286,988	$1,938	12/31/2023
Citigroup Inc.	285,298	$1,926	12/31/2023
FULC	285,298	$1,926	12/31/2023
Two Sigma Investments LP	261,752	$1,767	12/31/2023
FULC	261,752	$1,767	12/31/2023
Standard Life Aberdeen plc	256,888	$1,734	12/31/2023
FULC	256,888	$1,734	12/31/2023
Qube Research & Technologies Ltd	242,908	$1,640	12/31/2023
FULC	242,908	$1,640	12/31/2023
Alliancebernstein L.P.	239,458	$1,616	12/31/2023
FULC	239,458	$1,616	12/31/2023
Alyeska Investment Group L.P.	202,148	$1,364	12/31/2023
FULC	202,148	$1,364	12/31/2023
Bank of America Corp DE	187,472	$1,265	12/31/2023
FULC	187,472	$1,265	12/31/2023
Simplex Trading LLC		$1,252	03/31/2024
Call	102,900	$971	03/31/2024
FULC	30,739	$290	03/31/2024
Put	1,000	$9	03/31/2024
State Street Corp	183,147	$1,236	12/31/2023
FULC	183,147	$1,236	12/31/2023
Susquehanna Portfolio Strategies LLC	168,775	$1,139	12/31/2023
FULC	168,775	$1,139	12/31/2023
Northern Trust Corp	144,965	$979	12/31/2023
FULC	144,965	$979	12/31/2023
Laurion Capital Management LP	144,721	$977	12/31/2023
FULC	144,721	$977	12/31/2023
RBF Capital LLC	140,000	$945	12/31/2023
FULC	140,000	$945	12/31/2023
Fiduciary Trust Co.	136,555	$922	12/31/2023
FULC	136,555	$922	12/31/2023
Acuitas Investments LLC	134,850	$910	12/31/2023
FULC	134,850	$910	12/31/2023
Opaleye Management Inc.	130,000	$878	12/31/2023
FULC	130,000	$878	12/31/2023
Bridgeway Capital Management Inc.	126,500	$854	12/31/2023
FULC	126,500	$854	12/31/2023