Emerald Advisers, LLC
· New
Change
+780K
Date
Q1 2026
CO
| Investor | Type | Est. change | Change | Δ Own | Date | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
Emerald Advisers, LLC
· New
Change
+780K
Date
Q1 2026
|
Emerald Advisers, LLC | New· Q1 2026 | – | +780K | – | Q1 2026 | |||||
|
Two Sigma Investments, LP
· Added
Change
+553K
Δ Own
+102.0%
Date
Q1 2026
|
Two Sigma Investments, LP | Added· Q1 2026 | – | +553K | +102.0% | Q1 2026 | |||||
|
Goldman Sachs Group Inc
· Added
Change
+543K
Date
Q1 2026
|
Goldman Sachs Group Inc | Added· Q1 2026 | – | +543K | – | Q1 2026 | |||||
|
Driehaus Capital Management LLC
· New
Change
+539K
Date
Q1 2026
|
Driehaus Capital Management LLC | New· Q1 2026 | – | +539K | – | Q1 2026 | |||||
|
Segall Bryant & Hamill, LLC
· Added
Change
+532K
Date
Q1 2026
|
Segall Bryant & Hamill, LLC | Added· Q1 2026 | – | +532K | – | Q1 2026 | |||||
|
Emerald Mutual Fund Advisers Trust
· New
Change
+490K
Date
Q1 2026
|
Emerald Mutual Fund Advisers Trust | New· Q1 2026 | – | +490K | – | Q1 2026 | |||||
|
Millennium Management LLC
· Added
Change
+456K
Date
Q1 2026
|
Millennium Management LLC | Added· Q1 2026 | – | +456K | – | Q1 2026 | |||||
|
Algert Global LLC
· New
Change
+275K
Date
Q1 2026
|
Algert Global LLC | New· Q1 2026 | – | +275K | – | Q1 2026 | |||||
|
Davenport & Co LLC
· New
Change
+261K
Date
Q1 2026
|
Davenport & Co LLC | New· Q1 2026 | – | +261K | – | Q1 2026 | |||||
|
First Eagle Investment Management, LLC
· Added
Change
+226K
Δ Own
+91.4%
Date
Q1 2026
|
First Eagle Investment Management, LLC | Added· Q1 2026 | – | +226K | +91.4% | Q1 2026 | |||||
|
BNP Paribas Financial Markets
· Added
Change
+226K
Date
Q1 2026
|
BNP Paribas Financial Markets | Added· Q1 2026 | – | +226K | – | Q1 2026 | |||||
|
UBS Group AG
· Added
Change
+194K
Date
Q1 2026
|
UBS Group AG | Added· Q1 2026 | – | +194K | – | Q1 2026 | |||||
|
BlackRock
· Added
Change
+189K
Date
Q1 2026
|
BlackRock | Added· Q1 2026 | – | +189K | – | Q1 2026 | |||||
|
Cramer Rosenthal McGlynn LLC
· New
Change
+188K
Date
Q1 2026
|
Cramer Rosenthal McGlynn LLC | New· Q1 2026 | – | +188K | – | Q1 2026 | |||||
|
Trexquant Investment LP
· Added
Change
+162K
Date
Q1 2026
|
Trexquant Investment LP | Added· Q1 2026 | – | +162K | – | Q1 2026 | |||||
| Insider | Title | Type | Price | Qty | Value | Owned | ΔOwn | Trade date | Filed date | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Jones Jeffrey D.
· Officer
2 operations
0
|
Jones Jeffrey D. | Officer | 2 operations | – | 0 | – | 191K | – | Jul 15, 2026 | Jul 16, 2026 | |||||||||
|
Bohrson Christopher
· Officer
Sell
−$58K
|
Bohrson Christopher | Officer | Sell | $57.92 | −1K | −$58K | 171K | −0.6% | Jul 15, 2026 | Jul 16, 2026 | |||||||||
|
Caggia Andrew M.
· Director
Grant (A)
294
|
Caggia Andrew M. | Director | Grant (A) | – | 294 | – | 80K | – | Jun 26, 2026 | Jun 26, 2026 | |||||||||
|
Bohrson Christopher
· Officer
Sell
−$64K
|
Bohrson Christopher | Officer | Sell | $63.88 | −1K | −$64K | 172K | – | Jun 15, 2026 | Jun 16, 2026 | |||||||||
|
Jones Jeffrey D.
· Officer
Sell
−$609K
|
Jones Jeffrey D. | Officer | Sell | $46.84 | −13K | −$609K | 344K | – | May 22, 2026 | May 26, 2026 | |||||||||
|
Muller Luis A.
· Officer
Sell
−$2.1M
|
Muller Luis A. | Officer | Sell | $46.62 | −45K | −$2.1M | 928K | – | May 22, 2026 | May 26, 2026 | |||||||||
|
Donahue James A.
· Director
Sell
−$480K
|
Donahue James A. | Director | Sell | $46.77 | −10K | −$480K | 4K | – | May 22, 2026 | May 26, 2026 | |||||||||
|
Bilodeau Steven J.
· Director
Sell
−$460K
|
Bilodeau Steven J. | Director | Sell | $44.85 | −10K | −$460K | 52K | – | May 20, 2026 | May 22, 2026 | |||||||||
|
Bendush William
· Director
Other Form 4 events
10K
|
Bendush William | Director | Other Form 4 events | – | 10K | – | 35K | – | May 15, 2026 | May 19, 2026 | |||||||||
|
Bendush William
· Director
Grant (A)
4K
|
Bendush William | Director | Grant (A) | – | 4K | – | 4K | – | May 15, 2026 | May 19, 2026 | |||||||||
|
Donahue James A.
· Director
Grant (A)
4K
|
Donahue James A. | Director | Grant (A) | – | 4K | – | 14K | – | May 15, 2026 | May 19, 2026 | |||||||||
|
Bilodeau Steven J.
· Director
Grant (A)
4K
|
Bilodeau Steven J. | Director | Grant (A) | – | 4K | – | 63K | – | May 15, 2026 | May 19, 2026 | |||||||||
|
Caggia Andrew M.
· Director
Grant (A)
4K
|
Caggia Andrew M. | Director | Grant (A) | – | 4K | – | 80K | – | May 15, 2026 | May 19, 2026 | |||||||||
|
Jorden Yon
· Director
Grant (A)
4K
|
Jorden Yon | Director | Grant (A) | – | 4K | – | 35K | – | May 15, 2026 | May 19, 2026 | |||||||||
|
Mattes Andreas W.
· Director
Grant (A)
4K
|
Mattes Andreas W. | Director | Grant (A) | – | 4K | – | 26K | – | May 15, 2026 | May 19, 2026 | |||||||||
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243 reporting institutions disclosed COHU position changes in the Q1 2026 snapshot.
For each manager, WhoBought compares accepted consecutive 13F share counts. Share change is current shares minus prior shares. Estimated dollar change is that signed share change multiplied by the split-adjusted quarter-mean close. The activity table on this page uses Q1 2026.
An investor crossing 5% of a share class generally files Schedule 13D for activist intent or Schedule 13G for a passive position. The technical form names appear here rather than in the activity rows.
Ownership and institutional activity come from SEC Form 13F filings. Insider activity comes from SEC Form 4, and large-shareholder activity from SEC Schedules 13D and 13G. FMP supplies price data only. Company logos use the local verified Parqet cache with one shared fallback.
Form 13F is a quarterly disclosure and is normally filed after the quarter ends. Every ownership and activity value therefore names its represented period; it is not presented as a live position.
A muted dash marks a missing table value. It means the filing omitted the value, comparable data is unavailable, or no prior position exists for comparison.