There is a long list of 190 institutional holders of PRO 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 PRO by largest to smallest position reported in the institutional investor's latest 13F filing. In the institutional-holders-of-PRO table below, the initial column indicates the name of each top institutional holder of PRO, with a link to that fund's top holdings. The next columns indicate the amount of PRO stock held by each of the institutional holders of PRO, followed by the PRO 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
Vanguard Group Inc.	4,764,913	$184,831	12/31/2023
PRO	4,764,913	$184,831	12/31/2023
BlackRock Inc.		$150,261	12/31/2023
PRO	3,815,851	$148,017	12/31/2023
NOTE 2	2,000,000	$2,244	12/31/2023
Conestoga Capital Advisors LLC	3,250,044	$126,069	12/31/2023
PRO	3,250,044	$126,069	12/31/2023
FMR LLC	3,195,979	$123,972	12/31/2023
PRO	3,195,979	$123,972	12/31/2023
Brown Advisory Inc.	2,814,405	$109,171	12/31/2023
PRO	2,814,405	$109,171	12/31/2023
Fred Alger Management LLC	2,812,919	$109,113	12/31/2023
PRO	2,812,919	$109,113	12/31/2023
RGM Capital LLC	2,782,097	$107,918	12/31/2023
PRO	2,782,097	$107,918	12/31/2023
Linden Advisors LP		$84,604	12/31/2023
SDBCV	75,404,000	$84,604	12/31/2023
Brown Capital Management LLC	1,935,231	$75,068	12/31/2023
PRO	1,935,231	$75,068	12/31/2023
TENOR CAPITAL MANAGEMENT Co. L.P.		$67,708	12/31/2023
NOTE 2	58,585,000	$66,715	12/31/2023
NOTE 1	1,013,000	$993	12/31/2023
Stephens Investment Management Group LLC	1,261,727	$48,942	12/31/2023
PRO	1,261,727	$48,942	12/31/2023
Rockefeller Capital Management L.P.	1,243,206	$48,224	12/31/2023
PRO	1,243,206	$48,224	12/31/2023
State Street Corp	1,053,781	$40,876	12/31/2023
PRO	1,053,781	$40,876	12/31/2023
Geode Capital Management LLC	919,210	$35,660	12/31/2023
PRO	919,210	$35,660	12/31/2023
Morgan Stanley	909,605	$35,284	12/31/2023
PRO	909,605	$35,284	12/31/2023
Deutsche Bank AG	792,495	$30,741	12/31/2023
PRO	792,495	$30,741	12/31/2023
Eagle Asset Management Inc.	768,290	$29,802	12/31/2023
PRO	768,290	$29,802	12/31/2023
Goldman Sachs Group Inc.	696,608	$27,021	12/31/2023
PRO	696,608	$27,021	12/31/2023
William Blair Investment Management LLC	685,168	$26,578	12/31/2023
PRO	685,168	$26,578	12/31/2023
Granahan Investment Management Inc. MA	605,986	$23,506	12/31/2023
PRO	605,986	$23,506	12/31/2023
Citadel Advisors LLC		$23,506	12/31/2023
NOTE 2	19,000,000	$21,455	12/31/2023
PRO	44,473	$1,725	12/31/2023
Call	12,200	$473	12/31/2023
Put	3,800	$147	12/31/2023
New York State Common Retirement Fund	547,306	$21,230	12/31/2023
PRO	547,306	$21,230	12/31/2023
Mirae Asset Global Investments Co. Ltd.	519,814	$20,164	12/31/2023
PRO	519,814	$20,164	12/31/2023
Disciplined Growth Investors Inc. MN	510,328	$19,796	12/31/2023
PRO	510,328	$19,796	12/31/2023
Bank of America Corp DE	466,405	$18,092	12/31/2023
PRO	466,405	$18,092	12/31/2023
Invesco Ltd.	419,670	$16,279	12/31/2023
PRO	419,670	$16,279	12/31/2023
Northern Trust Corp	417,588	$16,198	12/31/2023
PRO	417,588	$16,198	12/31/2023
Nomura Holdings Inc.	415,701	$16,125	12/31/2023
PRO	415,701	$16,125	12/31/2023
Whetstone Capital Advisors LLC	396,160	$15,367	12/31/2023
PRO	396,160	$15,367	12/31/2023
Great West Life Assurance Co. Can	389,806	$15,117	12/31/2023
PRO	389,806	$15,117	12/31/2023
Driehaus Capital Management LLC	378,413	$14,679	12/31/2023
PRO	378,413	$14,679	12/31/2023
Silverback Asset Management LLC		$14,190	12/31/2023
NOTE 2	12,500,000	$14,190	12/31/2023
Axiom International Investors LLC DE	363,852	$14,114	12/31/2023
PRO	363,852	$14,114	12/31/2023
Royce & Associates LP	344,041	$13,345	12/31/2023
PRO	344,041	$13,345	12/31/2023
Charles Schwab Investment Management Inc.	336,223	$13,042	12/31/2023
PRO	336,223	$13,042	12/31/2023
Kornitzer Capital Management Inc. KS	323,551	$12,551	12/31/2023
PRO	323,551	$12,551	12/31/2023
Norges Bank	320,591	$12,436	12/31/2023
PRO	320,591	$12,436	12/31/2023
Primecap Management Co. CA	304,940	$11,829	12/31/2023
PRO	304,940	$11,829	12/31/2023
First Trust Advisors LP	299,308	$11,610	12/31/2023
PRO	299,308	$11,610	12/31/2023
Royal Bank of Canada	290,511	$11,269	12/31/2023
PRO	290,511	$11,269	12/31/2023
BRITISH COLUMBIA INVESTMENT MANAGEMENT Corp	290,110	$11,253	12/31/2023
PRO	290,110	$11,253	12/31/2023
Envestnet Asset Management Inc.	265,684	$10,306	12/31/2023
PRO	265,684	$10,306	12/31/2023
DeepCurrents Investment Group LLC		$10,256	12/31/2023
NOTE 2	7,419,000	$8,344	12/31/2023
NOTE 1	1,943,000	$1,912	12/31/2023
CSS LLC IL		$9,905	12/31/2023
NOTE 2	8,739,000	$9,905	12/31/2023
Rice Hall James & Associates LLC	243,983	$9,464	12/31/2023
PRO	243,983	$9,464	12/31/2023
Ameriprise Financial Inc.	239,815	$9,302	12/31/2023
PRO	239,815	$9,302	12/31/2023
Comerica Bank	234,203	$9,085	12/31/2023
PRO	234,203	$9,085	12/31/2023
Bank of New York Mellon Corp	233,220	$9,047	12/31/2023
PRO	233,220	$9,047	12/31/2023
Jefferies Financial Group Inc.	213,200	$8,270	12/31/2023
PRO	213,200	$8,270	12/31/2023
Context Capital Management LLC		$8,207	12/31/2023
NOTE 2	7,250,000	$8,207	12/31/2023

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

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