Position in ONTO
as of Jun 30, 2026
· filed Jul 31, 2026
Position Value
$22,707,000
+$6,301,400 QoQ
Shares Held
60,000
-25.0% QoQ
Ownership
0.122%
of shares outstanding
% of Portfolio
1.53%
of 13F equity value
Holder Rank
#117
of 686 holders
Holding Since
Dec 2025
3 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in ONTO Over Time
Shares Held
Position Value (USD)
Position in Semiconductor Equipment & Materials
Technology · as of Jun 30, 2026GENERAL AMERICAN INVESTORS CO INC holds $150,238,790 across 3 Semiconductor Equipment & Materials names. ONTO ranks #2 (15.1% of the industry book) .
All Filings in ONTO
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3 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $22,707,000 | 60,000 | Shares | Sole | 2026-07-31 | |
| 2026-03-31 | $16,405,600 | 80,000 | Shares | Sole | 2026-05-01 | |
| 2025-12-31 | $12,628,800 | 80,000 | Shares | Sole | 2026-02-13 | |
| No filing history on record for this holder in this stock. | ||||||