On this page, we present all of the funds holding XFOR from our database of 13F filers, detailed in the table below. The first column indicates the name of each of the funds holding XFOR, with a link to that fund's top holdings. The next columns indicate the amount of XFOR stock held by each of the funds holding XFOR, followed by the XFOR position size held by the fund, and lastly the date of the quarterly filing period the data represents. In total, we count 93 funds holding XFOR within the last two filing periods in our coverage universe of 13F filers, with the largest position size having been reported by Bain Capital Life Sciences Investors LLC. For more details on the positions held by Bain Capital Life Sciences Investors LLC (or by any of the other funds holding XFOR), click the fund name in the "Holder" column of the funds-holding-XFOR table below.

Holder	Amount	Position Size ($ in 1000's)	As of
Bain Capital Life Sciences Investors LLC	16,915,784	$14,184	12/31/2023
XFOR	16,915,784	$14,184	12/31/2023
NEA Management Company LLC	14,986,793	$12,566	12/31/2023
XFOR	14,986,793	$12,566	12/31/2023
BlackRock Inc.	8,417,524	$7,058	12/31/2023
XFOR	8,417,524	$7,058	12/31/2023
Vanguard Group Inc.	8,008,865	$6,715	12/31/2023
XFOR	8,008,865	$6,715	12/31/2023
Orbimed Advisors LLC	7,133,515	$5,981	12/31/2023
XFOR	7,133,515	$5,981	12/31/2023
Adage Capital Partners GP L.L.C.	4,276,315	$3,586	12/31/2023
XFOR	4,276,315	$3,586	12/31/2023
Sio Capital Management LLC	3,588,427	$3,009	12/31/2023
XFOR	3,588,427	$3,009	12/31/2023
Perceptive Advisors LLC	3,545,454	$2,973	12/31/2023
XFOR	3,545,454	$2,973	12/31/2023
Kingdon Capital Management L.L.C.	3,473,683	$2,913	12/31/2023
XFOR	3,473,683	$2,913	12/31/2023
AXA S.A.	3,073,532	$2,577	12/31/2023
XFOR	3,073,532	$2,577	12/31/2023
Geode Capital Management LLC	2,802,449	$2,350	12/31/2023
XFOR	2,802,449	$2,350	12/31/2023
State Street Corp	2,427,789	$2,036	12/31/2023
XFOR	2,427,789	$2,036	12/31/2023
Armistice Capital LLC	1,936,000	$1,623	12/31/2023
XFOR	1,936,000	$1,623	12/31/2023
UBS Oconnor LLC	1,743,038	$1,462	12/31/2023
XFOR	1,743,038	$1,462	12/31/2023
Citadel Advisors LLC		$1,414	12/31/2023
XFOR	1,728,065	$1,449	12/31/2023
Put	54,600	$46	12/31/2023
Call	13,500	$11	12/31/2023
Millennium Management LLC	1,664,317	$1,396	12/31/2023
XFOR	1,664,317	$1,396	12/31/2023
Northern Trust Corp	1,062,985	$891	12/31/2023
XFOR	1,062,985	$891	12/31/2023
GSA Capital Partners LLP	945,171	$793	12/31/2023
XFOR	945,171	$793	12/31/2023
Parkman Healthcare Partners LLC	767,332	$643	12/31/2023
XFOR	767,332	$643	12/31/2023
Point72 Asset Management L.P.	650,000	$545	12/31/2023
XFOR	650,000	$545	12/31/2023
Schonfeld Strategic Advisors LLC	549,300	$461	12/31/2023
XFOR	549,300	$461	12/31/2023
Propel Bio Management LLC	535,000	$449	12/31/2023
XFOR	535,000	$449	12/31/2023
Barclays PLC	529,601	$443	12/31/2023
XFOR	529,601	$443	12/31/2023
Nuveen Asset Management LLC	438,114	$367	12/31/2023
XFOR	438,114	$367	12/31/2023
Morgan Stanley	401,374	$337	12/31/2023
XFOR	401,374	$337	12/31/2023
Simplify Asset Management Inc.	400,000	$335	12/31/2023
XFOR	400,000	$335	12/31/2023
Royce & Associates LP	388,363	$326	12/31/2023
XFOR	388,363	$326	12/31/2023
Susquehanna International Group LLP		$297	12/31/2023
XFOR	402,921	$338	12/31/2023
Put	77,800	$65	12/31/2023
Call	28,600	$24	12/31/2023
Bank of New York Mellon Corp	345,954	$290	12/31/2023
XFOR	345,954	$290	12/31/2023
New Leaf Venture Partners L.L.C.	335,000	$281	12/31/2023
XFOR	335,000	$281	12/31/2023
Charles Schwab Investment Management Inc.	323,843	$272	12/31/2023
XFOR	323,843	$272	12/31/2023
BNP Paribas Arbitrage SA	283,544	$238	12/31/2023
XFOR	283,544	$238	12/31/2023
Bank of America Corp DE	212,888	$178	12/31/2023
XFOR	212,888	$178	12/31/2023
Acadian Asset Management LLC	181,609	$152	12/31/2023
XFOR	181,609	$152	12/31/2023
AQR Capital Management LLC	164,342	$138	12/31/2023
XFOR	164,342	$138	12/31/2023
Rhumbline Advisers	160,370	$135	12/31/2023
XFOR	160,370	$135	12/31/2023
Jane Street Group LLC	129,274	$108	12/31/2023
XFOR	129,274	$108	12/31/2023
Virtu Financial LLC	127,718	$107	12/31/2023
XFOR	127,718	$107	12/31/2023
Knott David M Jr	119,300	$100	12/31/2023
XFOR	119,300	$100	12/31/2023
Invesco Ltd.	96,426	$81	12/31/2023
XFOR	96,426	$81	12/31/2023
Stifel Financial Corp	90,452	$76	12/31/2023
XFOR	90,452	$76	12/31/2023
JPMorgan Chase & Co.	79,805	$67	12/31/2023
XFOR	79,805	$67	12/31/2023
Amundi	81,305	$67	12/31/2023
XFOR	81,305	$67	12/31/2023
Goldman Sachs Group Inc.	72,788	$61	12/31/2023
XFOR	72,788	$61	12/31/2023
XTX Topco Ltd	69,086	$58	12/31/2023
XFOR	69,086	$58	12/31/2023
Squarepoint Ops LLC	64,763	$54	12/31/2023
XFOR	64,763	$54	12/31/2023
American International Group Inc.	61,198	$51	12/31/2023
XFOR	61,198	$51	12/31/2023
Dimensional Fund Advisors LP	55,296	$46	12/31/2023
XFOR	55,296	$46	12/31/2023
New York State Common Retirement Fund	51,551	$43	12/31/2023
XFOR	51,551	$43	12/31/2023
Voya Investment Management LLC	49,260	$41	12/31/2023
XFOR	49,260	$41	12/31/2023
SG Americas Securities LLC	47,668	$40	12/31/2023
XFOR	47,668	$40	12/31/2023
Alliancebernstein L.P.	45,680	$38	12/31/2023
XFOR	45,680	$38	12/31/2023
CIBC Private Wealth Group LLC	45,000	$38	12/31/2023
XFOR	45,000	$38	12/31/2023
Vontobel Holding Ltd.	45,000	$38	12/31/2023
XFOR	45,000	$38	12/31/2023
Royal Bank of Canada	39,321	$33	12/31/2023
XFOR	39,321	$33	12/31/2023
Bayesian Capital Management LP	39,400	$33	12/31/2023
XFOR	39,400	$33	12/31/2023
Wells Fargo & Company MN	35,024	$29	12/31/2023
XFOR	35,024	$29	12/31/2023
State Board of Administration of Florida Retirement System	31,979	$27	12/31/2023
XFOR	31,979	$27	12/31/2023
The PNC Financial Services Group Inc.	30,158	$25	12/31/2023
XFOR	30,158	$25	12/31/2023
Walleye Capital LLC	29,616	$25	12/31/2023
XFOR	29,616	$25	12/31/2023
Price T Rowe Associates Inc. MD	26,793	$23	12/31/2023
XFOR	26,793	$23	12/31/2023
LexAurum Advisors LLC	16,000	$22	03/31/2024
XFOR	16,000	$22	03/31/2024
Resources Investment Advisors LLC.	25,801	$22	12/31/2023
XFOR	25,801	$22	12/31/2023
Grimes & Company Inc.	15,000	$21	03/31/2024
XFOR	15,000	$21	03/31/2024
Commonwealth Equity Services LLC	25,100	$21	12/31/2023
XFOR	25,100	$21	12/31/2023
Total Clarity Wealth Management Inc.	13,681	$19	03/31/2024
XFOR	13,681	$19	03/31/2024
Private Advisor Group LLC	21,800	$18	12/31/2023
XFOR	21,800	$18	12/31/2023
California State Teachers Retirement System	20,265	$17	12/31/2023
XFOR	20,265	$17	12/31/2023
ProShare Advisors LLC	20,378	$17	12/31/2023
XFOR	20,378	$17	12/31/2023
Simplex Trading LLC		$16	12/31/2023
Call	32,400	$27	12/31/2023
Put	15,200	$12	12/31/2023
XFOR	962	$1	12/31/2023
Citigroup Inc.	17,630	$15	12/31/2023
XFOR	17,630	$15	12/31/2023
Bleichroeder LP	17,865	$15	12/31/2023
XFOR	17,865	$15	12/31/2023
Victory Capital Management Inc.	17,079	$14	12/31/2023
XFOR	17,079	$14	12/31/2023
Principal Financial Group Inc.	16,626	$14	12/31/2023
XFOR	16,626	$14	12/31/2023
HRT Financial LP	17,084	$14	12/31/2023
XFOR	17,084	$14	12/31/2023
Wolverine Trading LLC		$12	12/31/2023
Call	28,000	$23	12/31/2023
Put	13,400	$11	12/31/2023
Pathstone Holdings LLC	12,637	$11	12/31/2023
XFOR	12,637	$11	12/31/2023
LPL Financial LLC	11,500	$10	12/31/2023
XFOR	11,500	$10	12/31/2023
Tower Research Capital LLC TRC	12,338	$10	12/31/2023
XFOR	12,338	$10	12/31/2023
Legal & General Group Plc	11,326	$9	12/31/2023
XFOR	11,326	$9	12/31/2023
Ameritas Investment Partners Inc.	10,167	$9	12/31/2023
XFOR	10,167	$9	12/31/2023
Mission Wealth Management LP	10,000	$8	12/31/2023
XFOR	10,000	$8	12/31/2023
PEAK6 Investments LLC	10,000	$8	12/31/2023
XFOR	10,000	$8	12/31/2023
Lazari Capital Management Inc.	10,000	$8	12/31/2023
XFOR	10,000	$8	12/31/2023
Ronald Blue Trust Inc.	8,520	$7	12/31/2023
XFOR	8,520	$7	12/31/2023
Amalgamated Bank	4,152	$6	03/31/2024
XFOR	4,152	$6	03/31/2024
Clearstead Advisors LLC	2,100	$2	12/31/2023
XFOR	2,100	$2	12/31/2023
ICA Group Wealth Management LLC	2,575	$2	12/31/2023
XFOR	2,575	$2	12/31/2023
FMR LLC	739	$1	12/31/2023
XFOR	739	$1	12/31/2023
Cubist Systematic Strategies LLC	1,612	$1	12/31/2023
XFOR	1,612	$1	12/31/2023
UBS Group AG	1,225	$1	12/31/2023
XFOR	1,225	$1	12/31/2023
CWM LLC	7	$0	03/31/2024
XFOR	7	$0	03/31/2024
Proequities Inc.		$0	12/31/2023
Put	0	$0	12/31/2023
Call	0	$0	12/31/2023
XFOR	0	$0	12/31/2023
Group One Trading L.P.	70,764	$-124	12/31/2023
Put	347,900	$292	12/31/2023
Call	130,100	$109	12/31/2023
XFOR	70,764	$59	12/31/2023