There is a long list of 229 institutional holders of OSIS 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 OSIS by largest to smallest position reported in the institutional investor's latest 13F filing. In the institutional-holders-of-OSIS table below, the initial column indicates the name of each top institutional holder of OSIS, with a link to that fund's top holdings. The next columns indicate the amount of OSIS stock held by each of the institutional holders of OSIS, followed by the OSIS 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
BlackRock Inc.	2,644,390	$341,259	12/31/2023
OSIS	2,644,390	$341,259	12/31/2023
Vanguard Group Inc.	2,097,875	$270,731	12/31/2023
OSIS	2,097,875	$270,731	12/31/2023
Janus Henderson Group PLC	1,230,206	$158,759	12/31/2023
OSIS	1,230,206	$158,759	12/31/2023
Dimensional Fund Advisors LP	819,671	$105,780	12/31/2023
OSIS	819,671	$105,780	12/31/2023
State Street Corp	687,589	$88,733	12/31/2023
OSIS	687,589	$88,733	12/31/2023
Credit Suisse AG	394,045	$50,852	12/31/2023
OSIS	394,045	$50,852	12/31/2023
Clearbridge Investments LLC	390,734	$50,424	12/31/2023
OSIS	390,734	$50,424	12/31/2023
Neumeier Poma Investment Counsel LLC	381,770	$49,267	12/31/2023
OSIS	381,770	$49,267	12/31/2023
Geode Capital Management LLC	349,340	$45,087	12/31/2023
OSIS	349,340	$45,087	12/31/2023
Neuberger Berman Group LLC	332,749	$42,966	12/31/2023
OSIS	332,749	$42,966	12/31/2023
Hood River Capital Management LLC	288,657	$37,251	12/31/2023
OSIS	288,657	$37,251	12/31/2023
Primecap Management Co. CA	285,200	$36,805	12/31/2023
OSIS	285,200	$36,805	12/31/2023
Systematic Financial Management LP	241,551	$31,172	12/31/2023
OSIS	241,551	$31,172	12/31/2023
Morgan Stanley	228,812	$29,528	12/31/2023
OSIS	228,812	$29,528	12/31/2023
Marshall Wace LLP	215,056	$27,753	12/31/2023
OSIS	215,056	$27,753	12/31/2023
Charles Schwab Investment Management Inc.	211,571	$27,303	12/31/2023
OSIS	211,571	$27,303	12/31/2023
JPMorgan Chase & Co.	204,027	$26,330	12/31/2023
OSIS	204,027	$26,330	12/31/2023
Boston Partners	194,609	$25,204	12/31/2023
OSIS	194,609	$25,204	12/31/2023
Invesco Ltd.	189,564	$24,463	12/31/2023
OSIS	189,564	$24,463	12/31/2023
Ophir Asset Management Pty Ltd	176,359	$22,759	12/31/2023
OSIS	176,359	$22,759	12/31/2023
Northern Trust Corp	173,854	$22,436	12/31/2023
OSIS	173,854	$22,436	12/31/2023
Thematics Asset Management	158,000	$20,390	12/31/2023
OSIS	158,000	$20,390	12/31/2023
Nuveen Asset Management LLC	152,940	$19,737	12/31/2023
OSIS	152,940	$19,737	12/31/2023
Bank of New York Mellon Corp	132,144	$17,053	12/31/2023
OSIS	132,144	$17,053	12/31/2023
Prospect Capital Advisors LLC	128,500	$16,583	12/31/2023
OSIS	128,500	$16,583	12/31/2023
Ameriprise Financial Inc.	126,446	$16,318	12/31/2023
OSIS	126,446	$16,318	12/31/2023
Lord Abbett & CO. LLC	116,095	$14,983	12/31/2023
OSIS	116,095	$14,983	12/31/2023
Norges Bank	115,625	$14,921	12/31/2023
OSIS	115,625	$14,921	12/31/2023
UBS Group AG	108,993	$14,066	12/31/2023
OSIS	108,993	$14,066	12/31/2023
Principal Financial Group Inc.	86,167	$11,120	12/31/2023
OSIS	86,167	$11,120	12/31/2023
Robeco Institutional Asset Management B.V.	81,952	$10,576	12/31/2023
OSIS	81,952	$10,576	12/31/2023
SG Capital Management LLC	75,919	$9,797	12/31/2023
OSIS	75,919	$9,797	12/31/2023
Wasatch Advisors Inc.	66,780	$8,618	12/31/2023
OSIS	66,780	$8,618	12/31/2023
Nordea Investment Management AB	62,799	$8,175	12/31/2023
OSIS	62,799	$8,175	12/31/2023
Assenagon Asset Management S.A.	61,572	$7,946	12/31/2023
OSIS	61,572	$7,946	12/31/2023
Citadel Advisors LLC		$7,768	12/31/2023
OSIS	58,990	$7,613	12/31/2023
Call	5,200	$671	12/31/2023
Put	4,000	$516	12/31/2023
Alliancebernstein L.P.	52,991	$6,838	12/31/2023
OSIS	52,991	$6,838	12/31/2023
Cardinal Capital Management LLC CT	51,644	$6,665	12/31/2023
OSIS	51,644	$6,665	12/31/2023
Asset Management One Co. Ltd.	48,972	$6,387	12/31/2023
OSIS	48,972	$6,387	12/31/2023
Man Group plc	49,147	$6,342	12/31/2023
OSIS	49,147	$6,342	12/31/2023
Granahan Investment Management Inc. MA	48,638	$6,277	12/31/2023
OSIS	48,638	$6,277	12/31/2023
Manatuck Hill Partners LLC	48,300	$6,233	12/31/2023
OSIS	48,300	$6,233	12/31/2023
Kennedy Capital Management Inc.	47,402	$6,117	12/31/2023
OSIS	47,402	$6,117	12/31/2023
Rhumbline Advisers	47,307	$6,105	12/31/2023
OSIS	47,307	$6,105	12/31/2023
Legal & General Group Plc	44,203	$5,704	12/31/2023
OSIS	44,203	$5,704	12/31/2023
Wedge Capital Management L L P NC	40,223	$5,191	12/31/2023
OSIS	40,223	$5,191	12/31/2023
Qube Research & Technologies Ltd	39,855	$5,143	12/31/2023
OSIS	39,855	$5,143	12/31/2023
Oberweis Asset Management Inc.	35,300	$4,555	12/31/2023
OSIS	35,300	$4,555	12/31/2023
D. E. Shaw & Co. Inc.	35,284	$4,553	12/31/2023
OSIS	35,284	$4,553	12/31/2023
Simplex Trading LLC		$4,217	12/31/2023
Call	30,300	$3,910	12/31/2023
OSIS	2,477	$319	12/31/2023
Put	100	$12	12/31/2023

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

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