There is a long list of 310 institutional holders of OPEN 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 OPEN by largest to smallest position reported in the institutional investor's latest 13F filing. In the institutional-holders-of-OPEN table below, the initial column indicates the name of each top institutional holder of OPEN, with a link to that fund's top holdings. The next columns indicate the amount of OPEN stock held by each of the institutional holders of OPEN, followed by the OPEN 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.	86,258,104	$386,436	12/31/2023
OPEN	86,258,104	$386,436	12/31/2023
BlackRock Inc.	50,672,097	$227,011	12/31/2023
OPEN	50,672,097	$227,011	12/31/2023
Renaissance Technologies LLC	26,416,474	$118,346	12/31/2023
OPEN	26,416,474	$118,346	12/31/2023
Sylebra Capital LLC	26,253,534	$117,616	12/31/2023
OPEN	26,253,534	$117,616	12/31/2023
Dimensional Fund Advisors LP	15,892,178	$71,203	12/31/2023
OPEN	15,892,178	$71,203	12/31/2023
Geode Capital Management LLC	13,664,428	$61,223	12/31/2023
OPEN	13,664,428	$61,223	12/31/2023
Deutsche Bank AG		$59,925	12/31/2023
OPEN	12,916,151	$57,864	12/31/2023
Call	460,000	$2,061	12/31/2023
State Street Corp	12,873,937	$57,675	12/31/2023
OPEN	12,873,937	$57,675	12/31/2023
GGV Capital LLC	12,811,695	$57,396	12/31/2023
OPEN	12,811,695	$57,396	12/31/2023
American Century Companies Inc.	10,290,502	$46,101	12/31/2023
OPEN	10,290,502	$46,101	12/31/2023
Morgan Stanley	9,683,998	$43,384	12/31/2023
OPEN	9,683,998	$43,384	12/31/2023
Susquehanna International Group LLP		$35,451	12/31/2023
OPEN	4,627,566	$20,731	12/31/2023
Call	3,788,700	$16,973	12/31/2023
Put	503,000	$2,253	12/31/2023
Two Sigma Investments LP	7,737,084	$34,662	12/31/2023
OPEN	7,737,084	$34,662	12/31/2023
Ieq Capital LLC	7,336,567	$32,868	12/31/2023
OPEN	7,336,567	$32,868	12/31/2023
Charles Schwab Investment Management Inc.	7,219,336	$32,343	12/31/2023
OPEN	7,219,336	$32,343	12/31/2023
AH Capital Management L.L.C.	6,738,010	$30,186	12/31/2023
OPEN	6,738,010	$30,186	12/31/2023
General Atlantic LLC	6,321,519	$28,320	12/31/2023
OPEN	6,321,519	$28,320	12/31/2023
Two Sigma Advisers LP	6,194,800	$27,753	12/31/2023
OPEN	6,194,800	$27,753	12/31/2023
Goldman Sachs Group Inc.	5,642,859	$25,280	12/31/2023
OPEN	5,642,859	$25,280	12/31/2023
Northern Trust Corp	5,222,741	$23,398	12/31/2023
OPEN	5,222,741	$23,398	12/31/2023
Bridgeway Capital Management Inc.	5,038,828	$22,574	12/31/2023
OPEN	5,038,828	$22,574	12/31/2023
Invesco Ltd.	4,907,679	$21,986	12/31/2023
OPEN	4,907,679	$21,986	12/31/2023
Jane Street Group LLC		$20,790	12/31/2023
OPEN	3,479,504	$15,588	12/31/2023
Call	1,359,200	$6,089	12/31/2023
Put	198,000	$887	12/31/2023
Nuveen Asset Management LLC	4,391,549	$19,674	12/31/2023
OPEN	4,391,549	$19,674	12/31/2023
NVP Associates LLC	4,189,562	$18,769	12/31/2023
OPEN	4,189,562	$18,769	12/31/2023
Group One Trading L.P.		$17,371	12/31/2023
OPEN	2,860,677	$12,816	12/31/2023
Call	1,577,300	$7,066	12/31/2023
Put	560,600	$2,511	12/31/2023
T. Rowe Price Investment Management Inc.	3,139,146	$14,064	12/31/2023
OPEN	3,139,146	$14,064	12/31/2023
JPMorgan Chase & Co.	2,789,343	$12,496	12/31/2023
OPEN	2,789,343	$12,496	12/31/2023
Arrowstreet Capital Limited Partnership	2,227,621	$9,980	12/31/2023
OPEN	2,227,621	$9,980	12/31/2023
Millennium Management LLC		$8,694	12/31/2023
OPEN	1,771,850	$7,938	12/31/2023
Call	168,800	$756	12/31/2023
Wells Fargo & Company MN	1,590,953	$7,127	12/31/2023
OPEN	1,590,953	$7,127	12/31/2023
Citigroup Inc.		$6,945	12/31/2023
OPEN	1,554,223	$6,963	12/31/2023
Put	265,200	$1,188	12/31/2023
Call	261,200	$1,170	12/31/2023
Gotham Asset Management LLC	1,475,492	$6,610	12/31/2023
OPEN	1,475,492	$6,610	12/31/2023
Bank of New York Mellon Corp	2,043,795	$6,193	03/31/2024
OPEN	2,043,795	$6,193	03/31/2024
Empowered Funds LLC	1,335,581	$5,983	12/31/2023
OPEN	1,335,581	$5,983	12/31/2023
Citadel Advisors LLC		$4,850	12/31/2023
Call	2,212,000	$9,910	12/31/2023
Put	1,195,400	$5,355	12/31/2023
OPEN	65,921	$295	12/31/2023
Barclays PLC	1,078,744	$4,834	12/31/2023
OPEN	1,078,744	$4,834	12/31/2023
Swiss National Bank	1,039,300	$4,656	12/31/2023
OPEN	1,039,300	$4,656	12/31/2023
Caz Investments LP	932,465	$4,177	12/31/2023
OPEN	932,465	$4,177	12/31/2023
Rhumbline Advisers	900,593	$4,035	12/31/2023
OPEN	900,593	$4,035	12/31/2023
UBS Group AG	866,219	$3,881	12/31/2023
OPEN	866,219	$3,881	12/31/2023
GTS Securities LLC		$3,667	12/31/2023
Call	1,066,600	$4,778	12/31/2023
Put	260,100	$1,165	12/31/2023
OPEN	12,123	$54	12/31/2023
Bank of America Corp DE	801,303	$3,590	12/31/2023
OPEN	801,303	$3,590	12/31/2023
Victory Capital Management Inc.	796,531	$3,568	12/31/2023
OPEN	796,531	$3,568	12/31/2023
Jacobs Levy Equity Management Inc.	700,923	$3,140	12/31/2023
OPEN	700,923	$3,140	12/31/2023
Alliancebernstein L.P.	663,607	$2,973	12/31/2023
OPEN	663,607	$2,973	12/31/2023
D. E. Shaw & Co. Inc.		$2,908	12/31/2023
OPEN	872,005	$3,907	12/31/2023
Put	223,000	$999	12/31/2023
Price T Rowe Associates Inc. MD	630,181	$2,824	12/31/2023
OPEN	630,181	$2,824	12/31/2023
Credit Suisse AG	575,172	$2,577	12/31/2023
OPEN	575,172	$2,577	12/31/2023
California State Teachers Retirement System	561,209	$2,514	12/31/2023
OPEN	561,209	$2,514	12/31/2023