On this page, we present all of the funds holding RLYB from our database of 13F filers, detailed in the table below. The first column indicates the name of each of the funds holding RLYB, with a link to that fund's top holdings. The next columns indicate the amount of RLYB stock held by each of the funds holding RLYB, followed by the RLYB position size held by the fund, and lastly the date of the quarterly filing period the data represents. In total, we count 55 funds holding RLYB within the last two filing periods in our coverage universe of 13F filers, with the largest position size having been reported by Viking Global Investors LP. For more details on the positions held by Viking Global Investors LP (or by any of the other funds holding RLYB), click the fund name in the "Holder" column of the funds-holding-RLYB table below.

Holder	Amount	Position Size ($ in 1000's)	As of
Viking Global Investors LP	4,194,777	$10,026	12/31/2023
RLYB	4,194,777	$10,026	12/31/2023
5AM Venture Management LLC	3,630,724	$8,677	12/31/2023
RLYB	3,630,724	$8,677	12/31/2023
New Leaf Venture Partners L.L.C.	3,301,603	$7,891	12/31/2023
RLYB	3,301,603	$7,891	12/31/2023
TPG GP A LLC	3,028,414	$7,238	12/31/2023
RLYB	3,028,414	$7,238	12/31/2023
FMR LLC	2,535,571	$6,060	12/31/2023
RLYB	2,535,571	$6,060	12/31/2023
Pivotal bioVenture Partners Investment Advisor LLC	2,404,644	$5,747	12/31/2023
RLYB	2,404,644	$5,747	12/31/2023
Novo Holdings A S	1,767,861	$4,225	12/31/2023
RLYB	1,767,861	$4,225	12/31/2023
BlackRock Inc.	1,755,594	$4,196	12/31/2023
RLYB	1,755,594	$4,196	12/31/2023
Standard Life Aberdeen plc	1,727,067	$4,128	12/31/2023
RLYB	1,727,067	$4,128	12/31/2023
Canaan Partners XI LLC	2,059,712	$3,810	03/31/2024
RLYB	2,059,712	$3,810	03/31/2024
Vanguard Group Inc.	1,063,970	$2,543	12/31/2023
RLYB	1,063,970	$2,543	12/31/2023
Laurion Capital Management LP	783,391	$1,872	12/31/2023
RLYB	783,391	$1,872	12/31/2023
State Street Corp	508,570	$1,215	12/31/2023
RLYB	508,570	$1,215	12/31/2023
Geode Capital Management LLC	505,261	$1,208	12/31/2023
RLYB	505,261	$1,208	12/31/2023
Mariner LLC	404,655	$967	12/31/2023
RLYB	404,655	$967	12/31/2023
Blue Owl Capital Holdings LP	350,240	$837	12/31/2023
RLYB	350,240	$837	12/31/2023
Citadel Advisors LLC	318,462	$761	12/31/2023
RLYB	318,462	$761	12/31/2023
Northern Trust Corp	249,788	$597	12/31/2023
RLYB	249,788	$597	12/31/2023
Anson Funds Management LP	183,970	$440	12/31/2023
RLYB	183,970	$440	12/31/2023
Bridgeway Capital Management Inc.	128,500	$307	12/31/2023
RLYB	128,500	$307	12/31/2023
Morgan Stanley	99,119	$237	12/31/2023
RLYB	99,119	$237	12/31/2023
Bank of New York Mellon Corp	90,278	$216	12/31/2023
RLYB	90,278	$216	12/31/2023
Charles Schwab Investment Management Inc.	77,018	$184	12/31/2023
RLYB	77,018	$184	12/31/2023
Nuveen Asset Management LLC	63,849	$153	12/31/2023
RLYB	63,849	$153	12/31/2023
Bank of America Corp DE	61,226	$146	12/31/2023
RLYB	61,226	$146	12/31/2023
Barclays PLC	57,479	$138	12/31/2023
RLYB	57,479	$138	12/31/2023
Rhumbline Advisers	38,759	$93	12/31/2023
RLYB	38,759	$93	12/31/2023
Millennium Management LLC	35,571	$85	12/31/2023
RLYB	35,571	$85	12/31/2023
Dimensional Fund Advisors LP	29,643	$71	12/31/2023
RLYB	29,643	$71	12/31/2023
UBS Group AG	25,732	$61	12/31/2023
RLYB	25,732	$61	12/31/2023
Jane Street Group LLC	24,719	$59	12/31/2023
RLYB	24,719	$59	12/31/2023
HarbourVest Partners LLC	21,877	$52	12/31/2023
RLYB	21,877	$52	12/31/2023
JPMorgan Chase & Co.	19,972	$48	12/31/2023
RLYB	19,972	$48	12/31/2023
Goldman Sachs Group Inc.	19,018	$45	12/31/2023
RLYB	19,018	$45	12/31/2023
SG Americas Securities LLC	16,813	$40	12/31/2023
RLYB	16,813	$40	12/31/2023
American International Group Inc.	15,197	$36	12/31/2023
RLYB	15,197	$36	12/31/2023
Marshall Wace LLP	15,025	$36	12/31/2023
RLYB	15,025	$36	12/31/2023
Hsbc Holdings PLC	14,145	$34	12/31/2023
RLYB	14,145	$34	12/31/2023
Squarepoint Ops LLC	14,036	$34	12/31/2023
RLYB	14,036	$34	12/31/2023
Citigroup Inc.	13,631	$33	12/31/2023
RLYB	13,631	$33	12/31/2023
Voya Investment Management LLC	13,254	$32	12/31/2023
RLYB	13,254	$32	12/31/2023
Utah Retirement Systems	13,240	$32	12/31/2023
RLYB	13,240	$32	12/31/2023
Susquehanna International Group LLP	11,417	$27	12/31/2023
RLYB	11,417	$27	12/31/2023
New York State Common Retirement Fund	10,467	$25	12/31/2023
RLYB	10,467	$25	12/31/2023
Capstone Investment Advisors LLC	10,000	$24	12/31/2023
RLYB	10,000	$24	12/31/2023
Wells Fargo & Company MN	9,629	$23	12/31/2023
RLYB	9,629	$23	12/31/2023
Royal Bank of Canada	9,121	$22	12/31/2023
RLYB	9,121	$22	12/31/2023
California State Teachers Retirement System	5,032	$12	12/31/2023
RLYB	5,032	$12	12/31/2023
Tower Research Capital LLC TRC	3,709	$9	12/31/2023
RLYB	3,709	$9	12/31/2023
Legal & General Group Plc	2,946	$7	12/31/2023
RLYB	2,946	$7	12/31/2023
Ameritas Investment Partners Inc.	2,525	$6	12/31/2023
RLYB	2,525	$6	12/31/2023
Amalgamated Bank	2,195	$5	12/31/2023
RLYB	2,195	$5	12/31/2023
Strs Ohio	1,700	$4	12/31/2023
RLYB	1,700	$4	12/31/2023
Capital Advisors Ltd. LLC	203	$0	03/31/2024
RLYB	203	$0	03/31/2024
Resources Management Corp CT ADV	2	$0	12/31/2023
RLYB	2	$0	12/31/2023
Proequities Inc.	0	$0	12/31/2023
RLYB	0	$0	12/31/2023