There is a long list of 482 institutional holders of RGEN 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 RGEN by largest to smallest position reported in the institutional investor's latest 13F filing. In the institutional-holders-of-RGEN table below, the initial column indicates the name of each top institutional holder of RGEN, with a link to that fund's top holdings. The next columns indicate the amount of RGEN stock held by each of the institutional holders of RGEN, followed by the RGEN 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
Steelhead Partners LLC		$15,984,504	12/31/2023
NOTE 1	14,238,000	$15,984,504	12/31/2023
BlackRock Inc.		$1,416,272	12/31/2023
RGEN	7,859,645	$1,413,164	12/31/2023
NOTE 0	1,967,000	$3,108	12/31/2023
Vanguard Group Inc.	5,078,294	$913,077	12/31/2023
RGEN	5,078,294	$913,077	12/31/2023
Price T Rowe Associates Inc. MD	4,010,255	$721,045	12/31/2023
RGEN	4,010,255	$721,045	12/31/2023
FMR LLC		$342,592	12/31/2023
RGEN	1,882,516	$338,476	12/31/2023
NOTE 0	2,605,000	$4,116	12/31/2023
State Street Corp		$317,764	12/31/2023
RGEN	1,703,618	$306,311	12/31/2023
NOTE 1	10,200,000	$11,453	12/31/2023
Macquarie Group Ltd.	1,568,792	$282,069	12/31/2023
RGEN	1,568,792	$282,069	12/31/2023
Brown Capital Management LLC	1,525,064	$274,207	12/31/2023
RGEN	1,525,064	$274,207	12/31/2023
Artisan Partners Limited Partnership	1,522,743	$273,789	12/31/2023
RGEN	1,522,743	$273,789	12/31/2023
Sands Capital Management LLC	1,495,337	$268,862	12/31/2023
RGEN	1,495,337	$268,862	12/31/2023
Bank of New York Mellon Corp		$207,171	12/31/2023
RGEN	1,150,665	$206,890	12/31/2023
NOTE	250,000	$281	12/31/2023
Wellington Management Group LLP	1,101,497	$198,049	12/31/2023
RGEN	1,101,497	$198,049	12/31/2023
Ameriprise Financial Inc.	984,788	$177,065	12/31/2023
RGEN	984,788	$177,065	12/31/2023
Champlain Investment Partners LLC	926,440	$166,574	12/31/2023
RGEN	926,440	$166,574	12/31/2023
Impax Asset Management Group plc	912,821	$163,177	12/31/2023
RGEN	912,821	$163,177	12/31/2023
William Blair Investment Management LLC	905,760	$162,856	12/31/2023
RGEN	905,760	$162,856	12/31/2023
Geode Capital Management LLC	882,977	$158,514	12/31/2023
RGEN	882,977	$158,514	12/31/2023
Invesco Ltd.		$155,156	12/31/2023
RGEN	833,144	$149,799	12/31/2023
NOTE 1	4,800,000	$5,357	12/31/2023
Alliancebernstein L.P.	777,025	$139,709	12/31/2023
RGEN	777,025	$139,709	12/31/2023
Harding Loevner LP	716,299	$128,992	12/31/2023
RGEN	716,299	$128,992	12/31/2023
Conestoga Capital Advisors LLC	709,738	$127,611	12/31/2023
RGEN	709,738	$127,611	12/31/2023
Point72 Asset Management L.P.		$118,567	12/31/2023
RGEN	596,895	$107,322	12/31/2023
NOTE 1	10,000,000	$11,245	12/31/2023
Nuveen Asset Management LLC		$105,663	12/31/2023
RGEN	541,117	$97,293	12/31/2023
NOTE 1	7,500,000	$8,370	12/31/2023
Voya Investment Management LLC	578,429	$104,002	12/31/2023
RGEN	578,429	$104,002	12/31/2023
Franklin Resources Inc.		$101,519	12/31/2023
RGEN	284,062	$51,074	12/31/2023
NOTE 1	45,000,000	$50,445	12/31/2023
Morgan Stanley		$100,244	12/31/2023
RGEN	541,032	$97,278	12/31/2023
NOTE 1	2,656,000	$2,964	12/31/2023
NOTE 0	1,000	$2	12/31/2023
Parnassus Investments CA	550,124	$98,912	12/31/2023
RGEN	550,124	$98,912	12/31/2023
D. E. Shaw & Co. Inc.		$95,419	12/31/2023
NOTE	74,172,000	$83,285	12/31/2023
RGEN	82,485	$14,831	12/31/2023
Put	15,000	$2,697	12/31/2023
Stephens Investment Management Group LLC	486,798	$87,526	12/31/2023
RGEN	486,798	$87,526	12/31/2023
DF Dent & Co. Inc.	486,353	$87,446	12/31/2023
RGEN	486,353	$87,446	12/31/2023
Baird Financial Group Inc.	470,691	$84,630	12/31/2023
RGEN	470,691	$84,630	12/31/2023
Riverbridge Partners LLC	450,939	$81,079	12/31/2023
RGEN	450,939	$81,079	12/31/2023
Northern Trust Corp	447,438	$80,449	12/31/2023
RGEN	447,438	$80,449	12/31/2023
Bank of America Corp DE		$80,177	12/31/2023
RGEN	415,921	$74,783	12/31/2023
Call	30,000	$5,394	12/31/2023
Bamco Inc. NY	445,758	$80,147	12/31/2023
RGEN	445,758	$80,147	12/31/2023
Fred Alger Management LLC	428,484	$77,041	12/31/2023
RGEN	428,484	$77,041	12/31/2023
New York State Common Retirement Fund	425,412	$76,489	12/31/2023
RGEN	425,412	$76,489	12/31/2023
T. Rowe Price Investment Management Inc.	403,362	$72,525	12/31/2023
RGEN	403,362	$72,525	12/31/2023
Citadel Advisors LLC		$71,788	12/31/2023
RGEN	280,478	$50,430	12/31/2023
NOTE 1	13,500,000	$15,173	12/31/2023
Call	56,600	$10,177	12/31/2023
Put	22,200	$3,992	12/31/2023
Federated Hermes Inc.	396,568	$71,303	12/31/2023
RGEN	396,568	$71,303	12/31/2023
12 West Capital Management LP	368,245	$66,210	12/31/2023
RGEN	368,245	$66,210	12/31/2023
American Century Companies Inc.	368,046	$66,175	12/31/2023
RGEN	368,046	$66,175	12/31/2023
DeepCurrents Investment Group LLC		$65,384	12/31/2023
NOTE 1	58,224,000	$65,384	12/31/2023
Amundi	367,152	$63,569	12/31/2023
RGEN	367,152	$63,569	12/31/2023
Allspring Global Investments Holdings LLC	335,836	$61,767	03/31/2024
RGEN	335,836	$61,767	03/31/2024
Charles Schwab Investment Management Inc.	342,452	$61,573	12/31/2023
RGEN	342,452	$61,573	12/31/2023
Bessemer Group Inc.	332,225	$59,735	12/31/2023
RGEN	332,225	$59,735	12/31/2023
BNP PARIBAS ASSET MANAGEMENT Holding S.A.	330,848	$59,486	12/31/2023
RGEN	330,848	$59,486	12/31/2023
Marshall Wace LLP	320,777	$57,676	12/31/2023
RGEN	320,777	$57,676	12/31/2023
Aequim Alternative Investments LP		$56,050	12/31/2023
NOTE 1	50,000,000	$56,050	12/31/2023

See All: Funds Holding RGEN
See Details: Top 10 Hedge Funds Holding RGEN
Also See: RGEN Insider Buying
Also See: RGEN Holdings Changes

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