Onto Innovation Inc.
Onto Innovation Inc. (ONTO) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · ONTO · as of Sep 30, 2025
Ownership Breakdown
502
Institutional Holders
▲ 30 vs Q2
$6.13B
Total Inst. Value
▲ $1.17B vs Q2
49.74M
Shares Outstanding
freeFloat 99.30%
47.44M
13F Shares Held
▼ 1.69M vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
ONTO largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
VANGUARD GROUP INC measuring & controlling devices, nec | 5.67M | 11.58% | 11.58% | $732.34B | Nov 7, 2025 | ▲ 294.4K |
BLACKROCK, INC. measuring & controlling devices, nec | 5.21M | 10.66% | 10.66% | $673.66B | Nov 12, 2025 | ▼ 1.27M |
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC measuring & controlling devices, nec | 1.98M | 4.05% | 4.05% | $256.08B | Nov 12, 2025 | ▲ 882.9K |
STATE STREET CORP measuring & controlling devices, nec | 1.48M | 3.02% | 3.02% | $190.63B | Nov 14, 2025 | ▼ 14.3K |
WELLINGTON MANAGEMENT GROUP LLP measuring & controlling devices, nec | 1.40M | 2.86% | 2.86% | $180.78B | Nov 14, 2025 | ▲ 1.29M |
FRANKLIN RESOURCES INC measuring & controlling devices, nec | 1.11M | 2.28% | 2.28% | $144.02B | Nov 13, 2025 | ▲ 440.0K |
PARADIGM CAPITAL MANAGEMENT INC/NY measuring & controlling devices, nec | 1.11M | 2.27% | 2.27% | $143.80B | Nov 14, 2025 | — held |
GENEVA CAPITAL MANAGEMENT LLC measuring & controlling devices, nec | 1.08M | 2.22% | 2.22% | $140.13B | Nov 13, 2025 | ▲ 2.8K |
D. E. SHAW & CO., INC. measuring & controlling devices, nec | 1.00M | 2.05% | 2.05% | $129.58B | Nov 14, 2025 | ▲ 8.8K |
VOYA INVESTMENT MANAGEMENT LLC measuring & controlling devices, nec | 868.6K | 1.78% | 1.78% | $111.97B | Oct 9, 2025 | ▲ 849.7K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
31
Increased
+6.93M shares6
New Positions
first time holders12
Decreased
−3.52M shares0
Sold Out
fully exitedNet shares change (top 50)
+3.41M
+6.93M / −3.52M
Net new holders
+25
6 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
ONTO insider trading · insider activity
Source: SEC Form 4
6
Buy transactions
3
Sell transactions
2.00
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Su May director | May 20, 2026 | Award | 761 | — | — | 8.0K | Form 4 ↗ |
SEAMS CHRISTOPHER A director | May 20, 2026 | Award | 761 | — | — | 38.5K | Form 4 ↗ |
SCHWARTZ STEPHEN S director | May 20, 2026 | Award | 761 | — | — | 3.5K | Form 4 ↗ |
MILLER DAVID BRIAN director | May 20, 2026 | Award | 761 | — | — | 12.7K | Form 4 ↗ |
Lynch Susan D director | May 20, 2026 | Award | 761 | — | — | 3.7K | Form 4 ↗ |
Kelley Stephen Douglas director | May 20, 2026 | Award | 761 | — | — | 6.4K | Form 4 ↗ |
YALDAEI RAMIL Chief Operating Officer | May 15, 2026 | Tax Withhold | 218 | $271.77 | $59.2K | 18.2K | Form 4 ↗ |
YALDAEI RAMIL Chief Operating Officer | May 15, 2026 | Tax Withhold | 625 | $271.77 | $169.9K | 17.6K | Form 4 ↗ |
OH Yoon Ah SVP, Gen Counsel & Corp Sec | May 15, 2026 | Tax Withhold | 530 | $271.77 | $144.0K | 21.1K | Form 4 ↗ |
ROBERTS BRIAN K Chief Financial Officer | Mar 2, 2026 | Award | 3,096 | — | — | 24.3K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Onto Innovation Inc. (ONTO) is primarily owned by institutional investors, who hold approximately 95.4% of total shares outstanding. Company insiders own approximately 0.70%, while retail and public investors account for the remaining 3.93%.
The largest institutional shareholder of Onto Innovation Inc. is VANGUARD GROUP INC, holding approximately 5.67 million shares — equal to 11.58% of outstanding shares — as of September 30, 2025.
A total of 502 institutional investors currently hold ONTO stock, with a combined institutional value of approximately $6.13 billion as of the most recent 13F filing period.
Frequently asked questions
ONTO ownershipOnto Innovation Inc. (ONTO) is primarily owned by institutional investors, who hold approximately 95.4% of shares. The largest shareholder is VANGUARD GROUP INC with a 11.58% stake. Company insiders hold 0.70%. Data sourced from SEC Form 13F as of September 30, 2025.