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 Mar 31, 2025
Ownership Breakdown
498
Institutional Holders
▼ 39 vs Q4
$5.74B
Total Inst. Value
▼ $2.11B vs Q4
49.74M
Shares Outstanding
freeFloat 99.30%
47.07M
13F Shares Held
▼ 112,520 vs Q4
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
Q1 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
BLACKROCK, INC. measuring & controlling devices, nec | 6.20M | 12.60% | 12.60% | $752.01B | May 2, 2025 | ▲ 157.8K |
VANGUARD GROUP INC measuring & controlling devices, nec | 5.16M | 10.49% | 10.49% | $626.15B | May 9, 2025 | ▼ 5.9K |
JPMORGAN CHASE & CO measuring & controlling devices, nec | 2.43M | 4.94% | 4.94% | $295.00B | May 12, 2025 | ▲ 238.9K |
STATE STREET CORP measuring & controlling devices, nec | 1.52M | 3.09% | 3.09% | $184.31B | May 15, 2025 | ▼ 6.0K |
INVESCO LTD. measuring & controlling devices, nec | 1.31M | 2.67% | 2.67% | $159.26B | May 12, 2025 | ▼ 93.5K |
MASSACHUSETTS FINANCIAL SERVICES CO /MA/ measuring & controlling devices, nec | 1.29M | 2.63% | 2.63% | $156.70B | May 2, 2025 | ▲ 421.2K |
FRANKLIN RESOURCES INC measuring & controlling devices, nec | 1.21M | 2.46% | 2.46% | $146.54B | May 13, 2025 | ▼ 345.6K |
PARADIGM CAPITAL MANAGEMENT INC/NY measuring & controlling devices, nec | 1.10M | 2.25% | 2.25% | $134.07B | May 15, 2025 | — held |
FMR LLC measuring & controlling devices, nec | 1.03M | 2.09% | 2.09% | $124.46B | May 12, 2025 | ▲ 282.5K |
GENEVA CAPITAL MANAGEMENT LLC measuring & controlling devices, nec | 1.02M | 2.06% | 2.06% | $123.20B | May 9, 2025 | ▲ 4.6K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q1 2025 vs prior quarter
Q1 2025
22
Increased
+3.35M shares3
New Positions
first time holders24
Decreased
−1.65M shares0
Sold Out
fully exitedNet shares change (top 50)
+1.70M
+3.35M / −1.65M
Net new holders
+1
3 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 94.6% of total shares outstanding. Company insiders own approximately 0.70%, while retail and public investors account for the remaining 4.67%.
The largest institutional shareholder of Onto Innovation Inc. is BLACKROCK, INC., holding approximately 6.20 million shares — equal to 12.60% of outstanding shares — as of March 31, 2025.
A total of 498 institutional investors currently hold ONTO stock, with a combined institutional value of approximately $5.74 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 94.6% of shares. The largest shareholder is BLACKROCK, INC. with a 12.60% stake. Company insiders hold 0.70%. Data sourced from SEC Form 13F as of March 31, 2025.