On this page, we present all of the funds holding ONTO from our database of 13F filers, detailed in the table below. The first column indicates the name of each of the funds holding ONTO, with a link to that fund's top holdings. The next columns indicate the amount of ONTO stock held by each of the funds holding ONTO, followed by the ONTO position size held by the fund, and lastly the date of the quarterly filing period the data represents. In total, we count 396 funds holding ONTO within the last two filing periods in our coverage universe of 13F filers, with the largest position size having been reported by BlackRock Inc.. For more details on the positions held by BlackRock Inc. (or by any of the other funds holding ONTO), click the fund name in the "Holder" column of the funds-holding-ONTO table below.

Holder	Amount	Position Size ($ in 1000's)	As of
BlackRock Inc.	6,145,448	$939,639	12/31/2023
ONTO	6,145,448	$939,639	12/31/2023
Vanguard Group Inc.	5,188,815	$793,370	12/31/2023
ONTO	5,188,815	$793,370	12/31/2023
T. Rowe Price Investment Management Inc.	1,987,715	$303,922	12/31/2023
ONTO	1,987,715	$303,922	12/31/2023
State Street Corp	1,664,142	$254,447	12/31/2023
ONTO	1,664,142	$254,447	12/31/2023
Dimensional Fund Advisors LP	1,329,813	$203,334	12/31/2023
ONTO	1,329,813	$203,334	12/31/2023
Paradigm Capital Management Inc. NY	1,168,739	$178,700	12/31/2023
ONTO	1,168,739	$178,700	12/31/2023
Geneva Capital Management LLC	1,145,677	$175,174	12/31/2023
ONTO	1,145,677	$175,174	12/31/2023
Alliancebernstein L.P.	1,124,619	$171,954	12/31/2023
ONTO	1,124,619	$171,954	12/31/2023
Invesco Ltd.	1,062,985	$162,530	12/31/2023
ONTO	1,062,985	$162,530	12/31/2023
Geode Capital Management LLC	1,057,104	$161,650	12/31/2023
ONTO	1,057,104	$161,650	12/31/2023
FMR LLC	1,044,895	$159,764	12/31/2023
ONTO	1,044,895	$159,764	12/31/2023
Price T Rowe Associates Inc. MD	946,879	$144,779	12/31/2023
ONTO	946,879	$144,779	12/31/2023
Franklin Resources Inc.	945,836	$144,618	12/31/2023
ONTO	945,836	$144,618	12/31/2023
Wellington Management Group LLP	844,623	$129,143	12/31/2023
ONTO	844,623	$129,143	12/31/2023
Fisher Asset Management LLC	817,018	$124,922	12/31/2023
ONTO	817,018	$124,922	12/31/2023
JPMorgan Chase & Co.	776,559	$118,736	12/31/2023
ONTO	776,559	$118,736	12/31/2023
Northern Trust Corp	687,358	$105,097	12/31/2023
ONTO	687,358	$105,097	12/31/2023
Stephens Investment Management Group LLC	643,947	$98,459	12/31/2023
ONTO	643,947	$98,459	12/31/2023
Hood River Capital Management LLC	629,098	$96,189	12/31/2023
ONTO	629,098	$96,189	12/31/2023
Nuveen Asset Management LLC	619,632	$94,742	12/31/2023
ONTO	619,632	$94,742	12/31/2023
Charles Schwab Investment Management Inc.	594,755	$90,938	12/31/2023
ONTO	594,755	$90,938	12/31/2023
Ameriprise Financial Inc.	588,339	$89,957	12/31/2023
ONTO	588,339	$89,957	12/31/2023
Bank of New York Mellon Corp	496,066	$89,828	03/31/2024
ONTO	496,066	$89,828	03/31/2024
Norges Bank	587,217	$89,785	12/31/2023
ONTO	587,217	$89,785	12/31/2023
Driehaus Capital Management LLC	569,911	$87,139	12/31/2023
ONTO	569,911	$87,139	12/31/2023
Allspring Global Investments Holdings LLC	470,059	$85,118	03/31/2024
ONTO	470,059	$85,118	03/31/2024
Congress Asset Management Co. MA	425,318	$77,017	03/31/2024
ONTO	425,318	$77,017	03/31/2024
Marshall Wace LLP	454,550	$69,501	12/31/2023
ONTO	454,550	$69,501	12/31/2023
Royal Bank of Canada	428,114	$65,458	12/31/2023
ONTO	428,114	$65,458	12/31/2023
American Century Companies Inc.	420,082	$64,231	12/31/2023
ONTO	420,082	$64,231	12/31/2023
Massachusetts Financial Services Co. MA	404,599	$61,863	12/31/2023
ONTO	404,599	$61,863	12/31/2023
Royce & Associates LP	362,917	$55,490	12/31/2023
ONTO	362,917	$55,490	12/31/2023
Loomis Sayles & Co. L P	354,784	$54,246	12/31/2023
ONTO	354,784	$54,246	12/31/2023
William Blair Investment Management LLC	346,846	$53,033	12/31/2023
ONTO	346,846	$53,033	12/31/2023
Morgan Stanley	344,542	$52,681	12/31/2023
ONTO	344,542	$52,681	12/31/2023
Macquarie Group Ltd.	319,729	$48,887	12/31/2023
ONTO	319,729	$48,887	12/31/2023
Brown Advisory Inc.	256,844	$46,509	03/31/2024
ONTO	256,844	$46,509	03/31/2024
Port Capital LLC	298,356	$45,619	12/31/2023
ONTO	298,356	$45,619	12/31/2023
Eagle Asset Management Inc.	295,824	$45,231	12/31/2023
ONTO	295,824	$45,231	12/31/2023
Goldman Sachs Group Inc.	290,938	$44,484	12/31/2023
ONTO	290,938	$44,484	12/31/2023
Robecosam AG	231,940	$42,000	03/31/2024
ONTO	231,940	$42,000	03/31/2024
Palisade Capital Management LLC NJ	267,810	$40,948	12/31/2023
ONTO	267,810	$40,948	12/31/2023
Lord Abbett & CO. LLC	266,054	$40,679	12/31/2023
ONTO	266,054	$40,679	12/31/2023
Systematic Financial Management LP	253,434	$38,750	12/31/2023
ONTO	253,434	$38,750	12/31/2023
Principal Financial Group Inc.	234,245	$35,816	12/31/2023
ONTO	234,245	$35,816	12/31/2023
Standard Life Aberdeen plc	215,703	$32,981	12/31/2023
ONTO	215,703	$32,981	12/31/2023
TimesSquare Capital Management LLC	198,418	$30,338	12/31/2023
ONTO	198,418	$30,338	12/31/2023
Clearbridge Investments LLC	197,037	$30,127	12/31/2023
ONTO	197,037	$30,127	12/31/2023
TT International Asset Management LTD	195,561	$29,901	12/31/2023
ONTO	195,561	$29,901	12/31/2023
Vaughan Nelson Investment Management L.P.	162,470	$29,420	03/31/2024
ONTO	162,470	$29,420	03/31/2024
Fort Washington Investment Advisors Inc. OH	160,603	$29,082	03/31/2024
ONTO	160,603	$29,082	03/31/2024
The Manufacturers Life Insurance Company	178,216	$27,249	12/31/2023
ONTO	178,216	$27,249	12/31/2023
Putnam Investments LLC	173,589	$26,542	12/31/2023
ONTO	173,589	$26,542	12/31/2023
CI Investments Inc.	160,816	$24,589	12/31/2023
ONTO	160,816	$24,589	12/31/2023
Value Holdings Management CO. LLC	160,775	$24,583	12/31/2023
ONTO	160,775	$24,583	12/31/2023
Rhumbline Advisers	156,364	$23,908	12/31/2023
ONTO	156,364	$23,908	12/31/2023
Emerald Advisers LLC	153,599	$23,485	12/31/2023
ONTO	153,599	$23,485	12/31/2023
Voya Investment Management LLC	151,224	$23,122	12/31/2023
ONTO	151,224	$23,122	12/31/2023
Neuberger Berman Group LLC	147,767	$22,594	12/31/2023
ONTO	147,767	$22,594	12/31/2023
Segall Bryant & Hamill LLC	142,285	$21,755	12/31/2023
ONTO	142,285	$21,755	12/31/2023
Sandler Capital Management	138,917	$21,240	12/31/2023
ONTO	138,917	$21,240	12/31/2023
Amundi	144,591	$20,905	12/31/2023
ONTO	144,591	$20,905	12/31/2023
Millennium Management LLC	130,945	$20,021	12/31/2023
ONTO	130,945	$20,021	12/31/2023
Emerald Mutual Fund Advisers Trust	126,328	$19,316	12/31/2023
ONTO	126,328	$19,316	12/31/2023
Sei Investments Co.	124,785	$19,080	12/31/2023
ONTO	124,785	$19,080	12/31/2023
Great Lakes Advisors LLC	122,923	$18,795	12/31/2023
ONTO	122,923	$18,795	12/31/2023
Barclays PLC	120,868	$18,481	12/31/2023
ONTO	120,868	$18,481	12/31/2023
Susquehanna International Group LLP		$17,845	12/31/2023
ONTO	79,308	$12,126	12/31/2023
Call	55,500	$8,486	12/31/2023
Put	18,100	$2,767	12/31/2023
Bessemer Group Inc.	112,075	$17,136	12/31/2023
ONTO	112,075	$17,136	12/31/2023
Bares Capital Management Inc.	112,000	$17,125	12/31/2023
ONTO	112,000	$17,125	12/31/2023
Tributary Capital Management LLC	93,234	$16,883	03/31/2024
ONTO	93,234	$16,883	03/31/2024
New York State Common Retirement Fund	110,103	$16,835	12/31/2023
ONTO	110,103	$16,835	12/31/2023
Legal & General Group Plc	107,457	$16,430	12/31/2023
ONTO	107,457	$16,430	12/31/2023
Impax Asset Management Group plc	107,057	$16,369	12/31/2023
ONTO	107,057	$16,369	12/31/2023
Swiss National Bank	96,641	$14,776	12/31/2023
ONTO	96,641	$14,776	12/31/2023
American International Group Inc.	90,255	$13,800	12/31/2023
ONTO	90,255	$13,800	12/31/2023
California Public Employees Retirement System	89,895	$13,745	12/31/2023
ONTO	89,895	$13,745	12/31/2023
South Street Advisors LLC	88,719	$13,565	12/31/2023
ONTO	88,719	$13,565	12/31/2023
Nordea Investment Management AB	86,652	$13,270	12/31/2023
ONTO	86,652	$13,270	12/31/2023
Jane Street Group LLC		$13,183	12/31/2023
Call	58,500	$8,945	12/31/2023
ONTO	27,715	$4,238	12/31/2023
Epoch Investment Partners Inc.	85,881	$13,131	12/31/2023
ONTO	85,881	$13,131	12/31/2023
Weiss Asset Management LP	83,412	$12,754	12/31/2023
ONTO	83,412	$12,754	12/31/2023
New York State Teachers Retirement System	69,891	$12,656	03/31/2024
ONTO	69,891	$12,656	03/31/2024
Bank of America Corp DE	80,035	$12,237	12/31/2023
ONTO	80,035	$12,237	12/31/2023
Telemark Asset Management LLC	75,000	$11,468	12/31/2023
ONTO	75,000	$11,468	12/31/2023
Wells Fargo & Company MN	73,220	$11,195	12/31/2023
ONTO	73,220	$11,195	12/31/2023
First Trust Advisors LP	72,567	$11,095	12/31/2023
ONTO	72,567	$11,095	12/31/2023
Tudor Investment Corp Et Al	70,510	$10,781	12/31/2023
ONTO	70,510	$10,781	12/31/2023
Silvercrest Asset Management Group LLC	69,949	$10,695	12/31/2023
ONTO	69,949	$10,695	12/31/2023
Congress Wealth Management LLC DE	58,413	$10,577	03/31/2024
ONTO	58,413	$10,577	03/31/2024
Credit Suisse AG	66,691	$10,197	12/31/2023
ONTO	66,691	$10,197	12/31/2023
State of Wisconsin Investment Board	66,380	$10,150	12/31/2023
ONTO	66,380	$10,150	12/31/2023
Envestnet Asset Management Inc.	64,860	$9,917	12/31/2023
ONTO	64,860	$9,917	12/31/2023
Janus Henderson Group PLC	64,605	$9,874	12/31/2023
ONTO	64,605	$9,874	12/31/2023
Retirement Systems of Alabama	61,470	$9,399	12/31/2023
ONTO	61,470	$9,399	12/31/2023
Natixis Advisors L.P.	51,088	$9,252	03/31/2024
ONTO	51,088	$9,252	03/31/2024
Mutual of America Capital Management LLC	60,375	$9,231	12/31/2023
ONTO	60,375	$9,231	12/31/2023
UBS Asset Management Americas Inc.	59,895	$9,158	12/31/2023
ONTO	59,895	$9,158	12/31/2023
Russell Investments Group Ltd.	58,567	$8,955	12/31/2023
ONTO	58,567	$8,955	12/31/2023
Granahan Investment Management Inc. MA	58,202	$8,899	12/31/2023
ONTO	58,202	$8,899	12/31/2023
Peregrine Capital Management LLC	49,113	$8,893	03/31/2024
ONTO	49,113	$8,893	03/31/2024
Value Aligned Research Advisors LLC	48,667	$8,813	03/31/2024
ONTO	48,667	$8,813	03/31/2024
Osterweis Capital Management Inc.	56,430	$8,628	12/31/2023
ONTO	56,430	$8,628	12/31/2023
UBS Group AG	53,731	$8,215	12/31/2023
ONTO	53,731	$8,215	12/31/2023
MetLife Investment Management LLC	52,496	$8,027	12/31/2023
ONTO	52,496	$8,027	12/31/2023
California State Teachers Retirement System	51,774	$7,916	12/31/2023
ONTO	51,774	$7,916	12/31/2023
Picton Mahoney Asset Management	51,412	$7,862	12/31/2023
ONTO	51,412	$7,862	12/31/2023
Castleark Management LLC	50,790	$7,766	12/31/2023
ONTO	50,790	$7,766	12/31/2023
Degroof Petercam Asset Management	50,000	$7,645	12/31/2023
ONTO	50,000	$7,645	12/31/2023
Pier Capital LLC	47,883	$7,321	12/31/2023
ONTO	47,883	$7,321	12/31/2023
Nicholas Company Inc.	47,396	$7,247	12/31/2023
ONTO	47,396	$7,247	12/31/2023
Thornburg Investment Management Inc.	46,455	$7,103	12/31/2023
ONTO	46,455	$7,103	12/31/2023
Oberweis Asset Management Inc.	44,600	$6,819	12/31/2023
ONTO	44,600	$6,819	12/31/2023
Texas Permanent School Fund	42,399	$6,483	12/31/2023
ONTO	42,399	$6,483	12/31/2023
First Eagle Investment Management LLC	41,398	$6,330	12/31/2023
ONTO	41,398	$6,330	12/31/2023
Lazard Asset Management LLC	37,754	$5,771	12/31/2023
ONTO	37,754	$5,771	12/31/2023
First Manhattan Co.	36,907	$5,643	12/31/2023
ONTO	36,907	$5,643	12/31/2023
Assetmark Inc.	36,462	$5,575	12/31/2023
ONTO	36,462	$5,575	12/31/2023
Great West Life Assurance Co. Can	35,890	$5,469	12/31/2023
ONTO	35,890	$5,469	12/31/2023
Citadel Advisors LLC		$5,363	12/31/2023
Call	39,500	$6,040	12/31/2023
Put	36,600	$5,596	12/31/2023
ONTO	32,174	$4,919	12/31/2023
EAM Global Investors LLC	34,593	$5,289	12/31/2023
ONTO	34,593	$5,289	12/31/2023
Divisar Capital Management LLC	34,088	$5,212	12/31/2023
ONTO	34,088	$5,212	12/31/2023
TD Asset Management Inc.	32,452	$4,962	12/31/2023
ONTO	32,452	$4,962	12/31/2023
EAM Investors LLC	31,377	$4,798	12/31/2023
ONTO	31,377	$4,798	12/31/2023
Glenmede Trust Co. NA	30,954	$4,733	12/31/2023
ONTO	30,954	$4,733	12/31/2023
Kennedy Capital Management Inc.	30,491	$4,662	12/31/2023
ONTO	30,491	$4,662	12/31/2023
Amalgamated Bank	25,729	$4,659	03/31/2024
ONTO	25,729	$4,659	03/31/2024
Deutsche Bank AG	29,115	$4,452	12/31/2023
ONTO	29,115	$4,452	12/31/2023
State of New Jersey Common Pension Fund D	28,786	$4,401	12/31/2023
ONTO	28,786	$4,401	12/31/2023
Strs Ohio	28,500	$4,357	12/31/2023
ONTO	28,500	$4,357	12/31/2023
Connor Clark & Lunn Investment Management Ltd.	28,135	$4,302	12/31/2023
ONTO	28,135	$4,302	12/31/2023
Redwood Investments LLC	27,179	$4,156	12/31/2023
ONTO	27,179	$4,156	12/31/2023
Calamos Advisors LLC	27,005	$4,129	12/31/2023
ONTO	27,005	$4,129	12/31/2023
Teachers Retirement System of The State of Kentucky	26,609	$4,068	12/31/2023
ONTO	26,609	$4,068	12/31/2023
Yousif Capital Management LLC	22,332	$4,044	03/31/2024
ONTO	22,332	$4,044	03/31/2024
LPL Financial LLC	25,940	$3,966	12/31/2023
ONTO	25,940	$3,966	12/31/2023
DZ BANK AG Deutsche Zentral Genossenschafts Bank Frankfurt am Main	25,478	$3,896	12/31/2023
ONTO	25,478	$3,896	12/31/2023
Moody Aldrich Partners LLC	24,201	$3,700	12/31/2023
ONTO	24,201	$3,700	12/31/2023
Mirae Asset Global Investments Co. Ltd.	23,604	$3,609	12/31/2023
ONTO	23,604	$3,609	12/31/2023
Crestline Management LP	22,661	$3,465	12/31/2023
ONTO	22,661	$3,465	12/31/2023
Comerica Bank	22,529	$3,445	12/31/2023
ONTO	22,529	$3,445	12/31/2023
Campbell Newman Asset Management Inc.	18,988	$3,438	03/31/2024
ONTO	18,988	$3,438	03/31/2024
Nicholas Investment Partners LP	22,029	$3,368	12/31/2023
ONTO	22,029	$3,368	12/31/2023
Bridge City Capital LLC	18,588	$3,366	03/31/2024
ONTO	18,588	$3,366	03/31/2024
Tanaka Capital Management Inc.	21,591	$3,301	12/31/2023
ONTO	21,591	$3,301	12/31/2023
State of Tennessee Treasury Department	21,488	$3,286	12/31/2023
ONTO	21,488	$3,286	12/31/2023
Citigroup Inc.	21,195	$3,241	12/31/2023
ONTO	21,195	$3,241	12/31/2023
PDT Partners LLC	21,054	$3,219	12/31/2023
ONTO	21,054	$3,219	12/31/2023
Raymond James & Associates	17,311	$3,135	03/31/2024
ONTO	17,311	$3,135	03/31/2024
Alberta Investment Management Corp	20,475	$3,131	12/31/2023
ONTO	20,475	$3,131	12/31/2023
PEAK6 Investments LLC		$3,052	12/31/2023
ONTO	12,165	$1,860	12/31/2023
Call	10,800	$1,651	12/31/2023
Put	3,000	$459	12/31/2023
Sequoia Financial Advisors LLC	19,830	$3,032	12/31/2023
ONTO	19,830	$3,032	12/31/2023
Penserra Capital Management LLC	19,742	$3,018	12/31/2023
ONTO	19,742	$3,018	12/31/2023
Ensign Peak Advisors Inc	17,771	$2,717	12/31/2023
ONTO	17,771	$2,717	12/31/2023
Prudential PLC	17,419	$2,663	12/31/2023
ONTO	17,419	$2,663	12/31/2023
Zions Bancorporation N.A.	16,965	$2,594	12/31/2023
ONTO	16,965	$2,594	12/31/2023
Victory Capital Management Inc.	16,917	$2,587	12/31/2023
ONTO	16,917	$2,587	12/31/2023
First National Bank of Omaha	16,870	$2,579	12/31/2023
ONTO	16,870	$2,579	12/31/2023
Louisiana State Employees Retirement System	14,100	$2,553	03/31/2024
ONTO	14,100	$2,553	03/31/2024
Legato Capital Management LLC	14,018	$2,538	03/31/2024
ONTO	14,018	$2,538	03/31/2024
Morse Asset Management Inc	16,599	$2,538	12/31/2023
ONTO	16,599	$2,538	12/31/2023
Creative Planning	16,539	$2,529	12/31/2023
ONTO	16,539	$2,529	12/31/2023
Keeley Teton Advisors LLC	16,276	$2,489	12/31/2023
ONTO	16,276	$2,489	12/31/2023
Ameritas Investment Partners Inc.	15,798	$2,416	12/31/2023
ONTO	15,798	$2,416	12/31/2023
EFG Asset Management North America Corp.	15,721	$2,401	12/31/2023
ONTO	15,721	$2,401	12/31/2023
NorthCrest Asset Manangement LLC	13,250	$2,399	03/31/2024
ONTO	13,250	$2,399	03/31/2024
State of Michigan Retirement System	12,100	$2,191	03/31/2024
ONTO	12,100	$2,191	03/31/2024
Rockefeller Capital Management L.P.	14,324	$2,190	12/31/2023
ONTO	14,324	$2,190	12/31/2023
Stifel Financial Corp	14,049	$2,148	12/31/2023
ONTO	14,049	$2,148	12/31/2023
State Board of Administration of Florida Retirement System	13,989	$2,139	12/31/2023
ONTO	13,989	$2,139	12/31/2023
Oregon Public Employees Retirement Fund	13,874	$2,121	12/31/2023
ONTO	13,874	$2,121	12/31/2023
Arizona State Retirement System	13,717	$2,097	12/31/2023
ONTO	13,717	$2,097	12/31/2023
Advisor Group Holdings Inc.	13,456	$2,057	12/31/2023
ONTO	13,456	$2,057	12/31/2023
Simplex Trading LLC		$1,955	03/31/2024
Call	12,700	$2,299	03/31/2024
Put	1,900	$344	03/31/2024
Zurcher Kantonalbank Zurich Cantonalbank	10,486	$1,899	03/31/2024
ONTO	10,486	$1,899	03/31/2024
Linden Thomas Advisory Services LLC	12,396	$1,895	12/31/2023
ONTO	12,396	$1,895	12/31/2023
Thrivent Financial for Lutherans	12,261	$1,875	12/31/2023
ONTO	12,261	$1,875	12/31/2023
Commonwealth Equity Services LLC	12,097	$1,850	12/31/2023
ONTO	12,097	$1,850	12/31/2023
New Mexico Educational Retirement Board	10,100	$1,829	03/31/2024
ONTO	10,100	$1,829	03/31/2024
ProShare Advisors LLC	11,645	$1,781	12/31/2023
ONTO	11,645	$1,781	12/31/2023
CI Private Wealth LLC	11,314	$1,730	12/31/2023
ONTO	11,314	$1,730	12/31/2023
Captrust Financial Advisors	11,243	$1,719	12/31/2023
ONTO	11,243	$1,719	12/31/2023
Liontrust Investment Partners LLP	11,000	$1,682	12/31/2023
ONTO	11,000	$1,682	12/31/2023
Pacer Advisors Inc.	10,997	$1,681	12/31/2023
ONTO	10,997	$1,681	12/31/2023
Northwestern Mutual Investment Management Company LLC	10,919	$1,670	12/31/2023
ONTO	10,919	$1,670	12/31/2023
Commonwealth of Pennsylvania Public School Empls Retrmt SYS	10,830	$1,656	12/31/2023
ONTO	10,830	$1,656	12/31/2023
Loup Funds LLC	8,819	$1,597	03/31/2024
ONTO	8,819	$1,597	03/31/2024
D. E. Shaw & Co. Inc.	10,387	$1,588	12/31/2023
ONTO	10,387	$1,588	12/31/2023
Townsquare Capital LLC	10,370	$1,586	12/31/2023
ONTO	10,370	$1,586	12/31/2023
Handelsbanken Fonder AB	10,200	$1,560	12/31/2023
ONTO	10,200	$1,560	12/31/2023
Juncture Wealth Strategies LLC	8,541	$1,547	03/31/2024
ONTO	8,541	$1,547	03/31/2024
US Bancorp DE	9,480	$1,449	12/31/2023
ONTO	9,480	$1,449	12/31/2023
New York Life Investment Management LLC	9,456	$1,446	12/31/2023
ONTO	9,456	$1,446	12/31/2023
Tower Research Capital LLC TRC	9,272	$1,418	12/31/2023
ONTO	9,272	$1,418	12/31/2023
Orion Portfolio Solutions LLC	9,211	$1,408	12/31/2023
ONTO	9,211	$1,408	12/31/2023
Mondrian Capital Management LLC	9,000	$1,376	12/31/2023
ONTO	9,000	$1,376	12/31/2023
Teacher Retirement System of Texas	8,484	$1,297	12/31/2023
ONTO	8,484	$1,297	12/31/2023
Pathstone Holdings LLC	7,976	$1,220	12/31/2023
ONTO	7,976	$1,220	12/31/2023
M&T Bank Corp	7,774	$1,189	12/31/2023
ONTO	7,774	$1,189	12/31/2023
Trust Point Inc.	6,343	$1,149	03/31/2024
ONTO	6,343	$1,149	03/31/2024
JustInvest LLC	7,263	$1,111	12/31/2023
ONTO	7,263	$1,111	12/31/2023
Xponance Inc.	7,061	$1,080	12/31/2023
ONTO	7,061	$1,080	12/31/2023
Public Employees Retirement Association of Colorado	6,959	$1,064	12/31/2023
ONTO	6,959	$1,064	12/31/2023
Pitcairn Co.	6,782	$1,037	12/31/2023
ONTO	6,782	$1,037	12/31/2023
Prudential Financial Inc.	6,672	$1,020	12/31/2023
ONTO	6,672	$1,020	12/31/2023
Guggenheim Capital LLC	6,637	$1,015	12/31/2023
ONTO	6,637	$1,015	12/31/2023
The PNC Financial Services Group Inc.	6,571	$1,005	12/31/2023
ONTO	6,571	$1,005	12/31/2023
Vontobel Holding Ltd.	6,535	$999	12/31/2023
ONTO	6,535	$999	12/31/2023
State of Alaska Department of Revenue	5,325	$964	03/31/2024
ONTO	5,325	$964	03/31/2024
Lisanti Capital Growth LLC	6,065	$927	12/31/2023
ONTO	6,065	$927	12/31/2023
Allianz Asset Management GmbH	6,000	$917	12/31/2023
ONTO	6,000	$917	12/31/2023
Pictet Asset Management Holding SA	5,729	$876	12/31/2023
ONTO	5,729	$876	12/31/2023
Bank of Montreal Can	5,564	$875	12/31/2023
ONTO	5,564	$875	12/31/2023
Azzad Asset Management Inc. ADV	4,733	$857	03/31/2024
ONTO	4,733	$857	03/31/2024
Federated Hermes Inc.	5,569	$852	12/31/2023
ONTO	5,569	$852	12/31/2023
Aspen Investment Management Inc	4,420	$800	03/31/2024
ONTO	4,420	$800	03/31/2024
Synovus Financial Corp	5,151	$788	12/31/2023
ONTO	5,151	$788	12/31/2023
AQR Capital Management LLC	5,131	$785	12/31/2023
ONTO	5,131	$785	12/31/2023
Banco Bilbao Vizcaya Argentaria S.A.	5,070	$775	12/31/2023
ONTO	5,070	$775	12/31/2023
Intrust Bank NA	5,033	$770	12/31/2023
ONTO	5,033	$770	12/31/2023
Cornerstone Investment Partners LLC	5,027	$769	12/31/2023
ONTO	5,027	$769	12/31/2023
Illinois Municipal Retirement Fund	4,865	$744	12/31/2023
ONTO	4,865	$744	12/31/2023
Securian Asset Management Inc	4,070	$737	03/31/2024
ONTO	4,070	$737	03/31/2024
International Assets Investment Management LLC	3,959	$734	03/31/2024
ONTO	3,959	$734	03/31/2024
Hancock Whitney Corp	4,792	$733	12/31/2023
ONTO	4,792	$733	12/31/2023
Stonebridge Capital Advisors LLC	4,741	$725	12/31/2023
ONTO	4,741	$725	12/31/2023
Shell Asset Management Co.	4,612	$705	12/31/2023
ONTO	4,612	$705	12/31/2023
Shaker Investments LLC OH	3,864	$700	03/31/2024
ONTO	3,864	$700	03/31/2024
Connecticut Wealth Management LLC	4,528	$692	12/31/2023
ONTO	4,528	$692	12/31/2023
CenterBook Partners LP	4,376	$669	12/31/2023
ONTO	4,376	$669	12/31/2023
Hunter Perkins Capital Management LLC	3,675	$665	03/31/2024
ONTO	3,675	$665	03/31/2024
Aviva PLC	4,314	$660	12/31/2023
ONTO	4,314	$660	12/31/2023
Fox Run Management L.L.C.	4,308	$659	12/31/2023
ONTO	4,308	$659	12/31/2023
Norden Group LLC	3,609	$654	03/31/2024
ONTO	3,609	$654	03/31/2024
Robeco Institutional Asset Management B.V.	3,514	$636	03/31/2024
ONTO	3,514	$636	03/31/2024
Envestnet Portfolio Solutions Inc.	4,119	$630	12/31/2023
ONTO	4,119	$630	12/31/2023
GSA Capital Partners LLP	4,052	$620	12/31/2023
ONTO	4,052	$620	12/31/2023
Chartwell Investment Partners LLC	3,676	$563	12/31/2023
ONTO	3,676	$563	12/31/2023
National Asset Management Inc.	3,605	$551	12/31/2023
ONTO	3,605	$551	12/31/2023
Sonora Investment Management Group LLC	3,574	$546	12/31/2023
ONTO	3,574	$546	12/31/2023
TIAA Trust National Association	3,500	$535	12/31/2023
ONTO	3,500	$535	12/31/2023
Jennison Associates LLC	3,487	$533	12/31/2023
ONTO	3,487	$533	12/31/2023
Cetera Advisor Networks LLC	3,462	$529	12/31/2023
ONTO	3,462	$529	12/31/2023
Crossmark Global Holdings Inc.	3,425	$524	12/31/2023
ONTO	3,425	$524	12/31/2023
Mariner LLC	3,412	$522	12/31/2023
ONTO	3,412	$522	12/31/2023
Advisors Asset Management Inc.	3,314	$507	12/31/2023
ONTO	3,314	$507	12/31/2023
Baird Financial Group Inc.	3,241	$496	12/31/2023
ONTO	3,241	$496	12/31/2023
Mackenzie Financial Corp	3,092	$473	12/31/2023
ONTO	3,092	$473	12/31/2023
Brevan Howard Capital Management LP	3,078	$471	12/31/2023
ONTO	3,078	$471	12/31/2023
Private Advisor Group LLC	3,069	$469	12/31/2023
ONTO	3,069	$469	12/31/2023
O Shaughnessy Asset Management LLC	3,064	$468	12/31/2023
ONTO	3,064	$468	12/31/2023
D.A. Davidson & CO.	3,045	$466	12/31/2023
ONTO	3,045	$466	12/31/2023
MML Investors Services LLC	3,021	$462	12/31/2023
ONTO	3,021	$462	12/31/2023
Evergreen Capital Management LLC	2,912	$445	12/31/2023
ONTO	2,912	$445	12/31/2023
HighTower Advisors LLC	2,886	$444	12/31/2023
ONTO	2,886	$444	12/31/2023
Mirabella Financial Services LLP	2,901	$444	12/31/2023
ONTO	2,901	$444	12/31/2023
WealthTrust Axiom LLC	2,866	$438	12/31/2023
ONTO	2,866	$438	12/31/2023
Profund Advisors LLC	2,784	$426	12/31/2023
ONTO	2,784	$426	12/31/2023
Metropolitan Life Insurance Co NY	2,779	$425	12/31/2023
ONTO	2,779	$425	12/31/2023
Mercer Global Advisors Inc. ADV	2,749	$420	12/31/2023
ONTO	2,749	$420	12/31/2023
Ausbil Investment Management Ltd	2,214	$410	03/31/2024
ONTO	2,214	$410	03/31/2024
KLR Investment Advisors LLC	2,387	$408	03/31/2024
ONTO	2,387	$408	03/31/2024
Brown Brothers Harriman & Co.	2,616	$400	12/31/2023
ONTO	2,616	$400	12/31/2023
Integrated Wealth Concepts LLC	2,608	$399	12/31/2023
ONTO	2,608	$399	12/31/2023
Forum Financial Management LP	2,567	$392	12/31/2023
ONTO	2,567	$392	12/31/2023
Baader Bank INC	2,522	$385	12/31/2023
ONTO	2,522	$385	12/31/2023
Advisory Research Inc.	2,446	$374	12/31/2023
ONTO	2,446	$374	12/31/2023
Nisa Investment Advisors LLC	2,380	$364	12/31/2023
ONTO	2,380	$364	12/31/2023
RTD Financial Advisors Inc.	2,000	$362	03/31/2024
ONTO	2,000	$362	03/31/2024
Janney Montgomery Scott LLC	2,358	$361	12/31/2023
ONTO	2,358	$361	12/31/2023
Harmony Asset Management LLC	2,303	$352	12/31/2023
ONTO	2,303	$352	12/31/2023
Mesirow Financial Investment Management Inc.	1,926	$349	03/31/2024
ONTO	1,926	$349	03/31/2024
Sontag Advisory LLC	2,256	$345	12/31/2023
ONTO	2,256	$345	12/31/2023
TFO TDC LLC	2,225	$340	12/31/2023
ONTO	2,225	$340	12/31/2023
Pacific Wealth Management	1,837	$333	03/31/2024
ONTO	1,837	$333	03/31/2024
Shelton Capital Management	2,148	$328	12/31/2023
ONTO	2,148	$328	12/31/2023
Cookson Peirce & Co. Inc.	1,805	$327	03/31/2024
ONTO	1,805	$327	03/31/2024
Harvest Fund Management Co. Ltd	2,075	$317	12/31/2023
ONTO	2,075	$317	12/31/2023
Schonfeld Strategic Advisors LLC	2,059	$315	12/31/2023
ONTO	2,059	$315	12/31/2023
State of Wyoming	2,030	$310	12/31/2023
ONTO	2,030	$310	12/31/2023
Los Angeles Capital Management & Equity Research Inc.	1,709	$309	03/31/2024
ONTO	1,709	$309	03/31/2024
QRG Capital Management Inc.	2,012	$308	12/31/2023
ONTO	2,012	$308	12/31/2023
DekaBank Deutsche Girozentrale	1,705	$306	03/31/2024
ONTO	1,705	$306	03/31/2024
Bayesian Capital Management LP	1,994	$305	12/31/2023
ONTO	1,994	$305	12/31/2023
Hsbc Holdings PLC	1,979	$303	12/31/2023
ONTO	1,979	$303	12/31/2023
Prudent Man Advisors LLC	1,906	$291	12/31/2023
ONTO	1,906	$291	12/31/2023
United Capital Financial Advisers LLC	1,886	$288	12/31/2023
ONTO	1,886	$288	12/31/2023
Entropy Technologies LP	1,801	$275	12/31/2023
ONTO	1,801	$275	12/31/2023
Argent Trust Co	1,767	$270	12/31/2023
ONTO	1,767	$270	12/31/2023
Yorktown Management & Research Co Inc	1,450	$263	03/31/2024
ONTO	1,450	$263	03/31/2024
Gagnon Securities LLC	1,700	$260	12/31/2023
ONTO	1,700	$260	12/31/2023
GTS Securities LLC		$260	12/31/2023
Call	1,700	$260	12/31/2023
Mount Yale Investment Advisors LLC	1,678	$257	12/31/2023
ONTO	1,678	$257	12/31/2023
VELA Investment Management LLC	1,683	$257	12/31/2023
ONTO	1,683	$257	12/31/2023
Unconventional Investor LLC	1,676	$256	12/31/2023
ONTO	1,676	$256	12/31/2023
Portside Wealth Group LLC	1,391	$252	03/31/2024
ONTO	1,391	$252	03/31/2024
FourThought Financial Partners LLC	1,649	$252	12/31/2023
ONTO	1,649	$252	12/31/2023
Raymond James Financial Services Advisors Inc.	1,356	$246	03/31/2024
ONTO	1,356	$246	03/31/2024
Twin Tree Management LP	1,608	$246	12/31/2023
ONTO	1,608	$246	12/31/2023
Park Avenue Securities LLC	1,345	$244	03/31/2024
ONTO	1,345	$244	03/31/2024
Canandaigua National Bank & Trust Co.	1,327	$240	03/31/2024
ONTO	1,327	$240	03/31/2024
SG Americas Securities LLC	1,523	$233	12/31/2023
ONTO	1,523	$233	12/31/2023
Coldstream Capital Management Inc.	1,519	$232	12/31/2023
ONTO	1,519	$232	12/31/2023
Proficio Capital Partners LLC	1,511	$231	12/31/2023
ONTO	1,511	$231	12/31/2023
Cubist Systematic Strategies LLC		$229	12/31/2023
Call	1,500	$229	12/31/2023
Wolverine Trading LLC		$228	12/31/2023
Put	2,800	$428	12/31/2023
Call	2,500	$382	12/31/2023
ONTO	1,790	$274	12/31/2023
Heritage Wealth Management LLC	1,254	$227	03/31/2024
ONTO	1,254	$227	03/31/2024
Barlow Wealth Partners Inc.	1,220	$225	03/31/2024
ONTO	1,220	$225	03/31/2024
Peterson Wealth Services	1,470	$225	12/31/2023
ONTO	1,470	$225	12/31/2023
Quantinno Capital Management LP	1,451	$222	12/31/2023
ONTO	1,451	$222	12/31/2023
Pinnacle Wealth Planning Services Inc.	1,434	$219	12/31/2023
ONTO	1,434	$219	12/31/2023
Greenhouse Wealth Management LLC	1,200	$217	03/31/2024
ONTO	1,200	$217	03/31/2024
CIBC Asset Management Inc	1,404	$215	12/31/2023
ONTO	1,404	$215	12/31/2023
Lindbrook Capital LLC	1,121	$203	03/31/2024
ONTO	1,121	$203	03/31/2024
Wealth Enhancement Advisory Services LLC	1,118	$202	03/31/2024
ONTO	1,118	$202	03/31/2024
Quadrant Capital Group LLC	1,212	$185	12/31/2023
ONTO	1,212	$185	12/31/2023
CWM LLC	1,016	$184	03/31/2024
ONTO	1,016	$184	03/31/2024
KBC Group NV	1,039	$159	12/31/2023
ONTO	1,039	$159	12/31/2023
Kapitalo Investimentos Ltda	948	$145	12/31/2023
ONTO	948	$145	12/31/2023
ZRC Wealth Management LLC	786	$142	03/31/2024
ONTO	786	$142	03/31/2024
Stephens Inc. AR	840	$128	12/31/2023
ONTO	840	$128	12/31/2023
GWM Advisors LLC	836	$128	12/31/2023
ONTO	836	$128	12/31/2023
YHB Investment Advisors Inc.	645	$117	03/31/2024
ONTO	645	$117	03/31/2024
Signaturefd LLC	690	$106	12/31/2023
ONTO	690	$106	12/31/2023
Asset Dedication LLC	579	$105	03/31/2024
ONTO	579	$105	03/31/2024
USA Financial Portformulas Corp	460	$70	12/31/2023
ONTO	460	$70	12/31/2023
UMB Bank N A MO	373	$68	03/31/2024
ONTO	373	$68	03/31/2024
Farther Finance Advisors LLC	444	$68	12/31/2023
ONTO	444	$68	12/31/2023
Parallel Advisors LLC	366	$56	12/31/2023
ONTO	366	$56	12/31/2023
First Horizon Advisors Inc.	299	$54	03/31/2024
ONTO	299	$54	03/31/2024
GAMMA Investing LLC	292	$53	03/31/2024
ONTO	292	$53	03/31/2024
Focused Wealth Management Inc	331	$51	12/31/2023
ONTO	331	$51	12/31/2023
Fifth Third Bancorp	209	$38	03/31/2024
ONTO	209	$38	03/31/2024
Rise Advisors LLC	210	$38	03/31/2024
ONTO	210	$38	03/31/2024
WASHINGTON TRUST Co	200	$36	03/31/2024
ONTO	200	$36	03/31/2024
Contravisory Investment Management Inc.	180	$33	03/31/2024
ONTO	180	$33	03/31/2024
Plante Moran Financial Advisors LLC	213	$33	12/31/2023
ONTO	213	$33	12/31/2023
Huntington National Bank	200	$31	12/31/2023
ONTO	200	$31	12/31/2023
Public Employees Retirement System of Ohio	205	$31	12/31/2023
ONTO	205	$31	12/31/2023
Smithfield Trust Co.	201	$31	12/31/2023
ONTO	201	$31	12/31/2023
Whittier Trust Co.	198	$30	12/31/2023
ONTO	198	$30	12/31/2023
Advisory Services Network LLC	185	$28	12/31/2023
ONTO	185	$28	12/31/2023
Van ECK Associates Corp	157	$24	12/31/2023
ONTO	157	$24	12/31/2023
LGT Financial Advisors LLC	155	$24	12/31/2023
ONTO	155	$24	12/31/2023
Impact Partnership Wealth LLC	160	$24	12/31/2023
ONTO	160	$24	12/31/2023
SYSTM Wealth Solutions LLC	128	$23	03/31/2024
ONTO	128	$23	03/31/2024
Nelson Van Denburg & Campbell Wealth Management Group LLC	148	$23	12/31/2023
ONTO	148	$23	12/31/2023
Silicon Valley Capital Partners	148	$23	12/31/2023
ONTO	148	$23	12/31/2023
Massmutual Trust Co. FSB ADV	88	$16	03/31/2024
ONTO	88	$16	03/31/2024
EverSource Wealth Advisors LLC	95	$15	12/31/2023
ONTO	95	$15	12/31/2023
FSA Wealth Management LLC	100	$15	12/31/2023
ONTO	100	$15	12/31/2023
Washington Trust Advisors Inc.	100	$15	12/31/2023
ONTO	100	$15	12/31/2023
Benjamin F. Edwards & Company Inc.	63	$10	12/31/2023
ONTO	63	$10	12/31/2023
IFP Advisors Inc	64	$10	12/31/2023
ONTO	64	$10	12/31/2023
Covestor Ltd	64	$10	12/31/2023
ONTO	64	$10	12/31/2023
BOKF NA	59	$9	12/31/2023
ONTO	59	$9	12/31/2023
Principal Securities Inc.	56	$9	12/31/2023
ONTO	56	$9	12/31/2023
Rakuten Securities Inc.	60	$9	12/31/2023
ONTO	60	$9	12/31/2023
Hexagon Capital Partners LLC	45	$8	03/31/2024
ONTO	45	$8	03/31/2024
Bellevue Asset Management LLC	32	$6	03/31/2024
ONTO	32	$6	03/31/2024
Creative Financial Designs Inc. ADV	40	$6	12/31/2023
ONTO	40	$6	12/31/2023
Private Trust Co. NA	30	$5	03/31/2024
ONTO	30	$5	03/31/2024
GoalVest Advisory LLC	29	$5	03/31/2024
ONTO	29	$5	03/31/2024
Mitsubishi UFJ Kokusai Asset Management Co. Ltd.	32	$5	12/31/2023
ONTO	32	$5	12/31/2023
JFS Wealth Advisors LLC	34	$5	12/31/2023
ONTO	34	$5	12/31/2023
Y.D. More Investments Ltd	30	$5	12/31/2023
ONTO	30	$5	12/31/2023
First Financialcorp IN	23	$4	03/31/2024
ONTO	23	$4	03/31/2024
Farmers & Merchants Investments Inc.	20	$4	03/31/2024
ONTO	20	$4	03/31/2024
Global Retirement Partners LLC	24	$4	03/31/2024
ONTO	24	$4	03/31/2024
Sandy Spring Bank	25	$4	12/31/2023
ONTO	25	$4	12/31/2023
Larson Financial Group LLC	27	$4	12/31/2023
ONTO	27	$4	12/31/2023
Bell Investment Advisors Inc	25	$4	12/31/2023
ONTO	25	$4	12/31/2023
Private Wealth Management Group LLC	25	$4	12/31/2023
ONTO	25	$4	12/31/2023
Allworth Financial LP	19	$3	03/31/2024
ONTO	19	$3	03/31/2024
Sunbelt Securities Inc.	17	$3	03/31/2024
ONTO	17	$3	03/31/2024
Versant Capital Management Inc	17	$3	03/31/2024
ONTO	17	$3	03/31/2024
SJS Investment Consulting Inc.	17	$3	03/31/2024
ONTO	17	$3	03/31/2024
Proequities Inc.		$2	12/31/2023
ONTO	13	$2	12/31/2023
Put	0	$0	12/31/2023
Call	0	$0	12/31/2023
Northwestern Mutual Wealth Management Co.	16	$2	12/31/2023
ONTO	16	$2	12/31/2023
Key Financial Inc	16	$2	12/31/2023
ONTO	16	$2	12/31/2023
RFP Financial Group LLC	14	$2	12/31/2023
ONTO	14	$2	12/31/2023
AdvisorNet Financial Inc	5	$1	03/31/2024
ONTO	5	$1	03/31/2024
Clearstead Advisors LLC	6	$1	12/31/2023
ONTO	6	$1	12/31/2023
Manchester Capital Management LLC	5	$1	12/31/2023
ONTO	5	$1	12/31/2023
Glassman Wealth Services	4	$1	12/31/2023
ONTO	4	$1	12/31/2023
Institutional & Family Asset Management LLC	6	$1	12/31/2023
ONTO	6	$1	12/31/2023
Steward Partners Investment Advisory LLC	9	$1	12/31/2023
ONTO	9	$1	12/31/2023
Carolinas Wealth Consulting LLC	7	$1	12/31/2023
ONTO	7	$1	12/31/2023
Ronald Blue Trust Inc.	4	$1	12/31/2023
ONTO	4	$1	12/31/2023
DiNuzzo Private Wealth Inc.	9	$1	12/31/2023
ONTO	9	$1	12/31/2023
WealthCollab LLC	6	$1	12/31/2023
ONTO	6	$1	12/31/2023
Financial Management Professionals Inc.	2	$0	03/31/2024
ONTO	2	$0	03/31/2024
Nomura Asset Management Co. Ltd.	0	$0	12/31/2023
ONTO	0	$0	12/31/2023
Harel Insurance Investments & Financial Services Ltd.	1	$0	12/31/2023
ONTO	1	$0	12/31/2023
Crewe Advisors LLC	1	$0	12/31/2023
ONTO	1	$0	12/31/2023
Oliver Lagore Vanvalin Investment Group	0	$0	12/31/2023
ONTO	0	$0	12/31/2023
Walleye Trading LLC	2,100	$-321	12/31/2023
Put	2,100	$321	12/31/2023

See Summary: Institutional Holders of ONTO
See Details: Top 10 Hedge Funds Holding ONTO
Also See: ONTO Insider Buying
Also See: ONTO Holdings Changes

ONTO — Current Quote

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ONTO — Performance