Company · Ownership research

ONTO INNOVATION INC. ONTO

CIK 0000704532 · CUSIP 683344105

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 683344105 (ONTO), not CUSIP 683344905 (ONTO), CUSIP 683344955 (ONTO), and does not merge CUSIPs.

This page lists the top 20 of 451 rows by value; the complete set is available through the API.

Some filings reported values in thousands; those figures were scaled ×1,000 to dollars.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	BlackRock, Inc. CIK 2012383 · View history	$654.56M 6,485,321 shares	0.01%	+287.77K(+4.60%)Added	SEC filing ↗ Aug 12, 2025	▾
02	VANGUARD GROUP INC CIK 102909 · View history	$542.30M 5,373,011 shares	0.01%	+212.75K(+4.10%)Added	SEC filing ↗ Aug 11, 2025	▾
03	STATE STREET CORP CIK 93751 · View history	$150.33M 1,489,496 shares	0.01%	-29.49K(-1.90%)Reduced	SEC filing ↗ Aug 14, 2025	▾
04	FMR LLC CIK 315066 · View history	$140.66M 1,393,591 shares	0.01%	+367.87K(+35.90%)Added	SEC filing ↗ Aug 14, 2025	▾
05	PARADIGM CAPITAL MANAGEMENT INC/NY CIK 1037792 · View history	$112.32M 1,112,839 shares	5.47%	+7.90K(+0.70%)Added	SEC filing ↗ Aug 14, 2025	▾
06	WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC CIK 1644956 · View history	$110.91M 1,098,860 shares	0.29%	+952.42K(+650.40%)Added	SEC filing ↗ Jul 29, 2025	▾
07	GENEVA CAPITAL MANAGEMENT LLC CIK 1009232 · View history	$109.17M 1,081,662 shares	1.83%	+66.34K(+6.50%)Added	SEC filing ↗ Aug 5, 2025	▾
08	D. E. Shaw & Co., Inc. CIK 1009207 · View history	$100.32M 994,002 shares	0.10%	+772.94K(+349.60%)Added	SEC filing ↗ Aug 14, 2025	▾
09	T. Rowe Price Investment Management, Inc. CIK 1897612 · View history	$99.36M 984,457 shares	0.06%	+969.11K(+6,315.50%)Added	SEC filing ↗ Aug 14, 2025	▾
10	UBS Group AG CIK 1610520 · View history	$99.30M 983,854 shares	0.02%	+771.13K(+362.50%)Added	SEC filing ↗ Aug 14, 2025	▾
11	Qube Research & Technologies Ltd CIK 1729829 · View history	$90.96M 901,180 shares	0.13%	+845.21K(+1,510.20%)Added	SEC filing ↗ Aug 14, 2025	▾
12	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$88.63M 877,967 shares	0.01%	-1.46K(-0.20%)Reduced	SEC filing ↗ Aug 8, 2025	▾
13	DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history	$78.43M 777,100 shares	0.02%	+85.37K(+12.30%)Added	SEC filing ↗ Aug 12, 2025	▾
14	MILLENNIUM MANAGEMENT LLC CIK 1273087 · View history	$72.86M 721,878 shares	0.07%	+572.76K(+384.10%)Added	SEC filing ↗ Aug 14, 2025	▾
15	NORGES BANK CIK 1374170 · View history	$71.96M 712,979 shares	0.01%	+110.75K(+18.40%)Added	SEC filing ↗ Aug 13, 2025	▾
16	BARCLAYS PLC CIK 312069 · Amended · View history	$70.91M 702,572 shares	0.03%	+355.34K(+102.30%)Added	SEC filing ↗ Feb 27, 2026	▾
17	FRANKLIN RESOURCES INC CIK 38777 · View history	$68.07M 674,466 shares	0.02%	-533.18K(-44.20%)Reduced	SEC filing ↗ Aug 12, 2025	▾
18	Rafferty Asset Management, LLC CIK 1389426 · View history	$64.55M 639,566 shares	0.21%	+246.36K(+62.70%)Added	SEC filing ↗ Aug 14, 2025	▾
19	TWO SIGMA INVESTMENTS, LP CIK 1179392 · View history	$61.28M 607,138 shares	0.11%	+601.86K(+11,392.30%)Added	SEC filing ↗ Aug 14, 2025	▾
20	BNP PARIBAS FINANCIAL MARKETS CIK 1166588 · View history	$57.14M 566,116 shares	0.04%	+438.22K(+342.60%)Added	SEC filing ↗ Aug 14, 2025	▾

Showing 20 / 451 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

451

Cancelled or null records excluded

Disclosed shares

49,100,373

Not deduplicated across managers

Disclosed value

$4.96B

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

ONTO INNOVATION INC. · Q2 2025

Explore all 451 reporting institutions.

This page includes 20 of 451 reporting institutions. Log in to look up the full history beyond 3 years, use advanced screening & filtering, download CSV, and get the complete set through the Akkru API.

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Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.