Ultra Clean Holdings
UCTT
331 hedge funds and large institutions have $2.8B invested in Ultra Clean Holdings in 2026 Q1 according to their latest regulatory filings, with 118 funds opening new positions, 93 increasing their positions, 84 reducing their positions, and 21 closing their positions.
1,882% more call options, than puts
Call options by funds: $311M | Put options by funds: $15.7M
462% more first-time investments, than exits
New positions opened: 118 | Existing positions closed: 21
300% more funds holding in top 10
Funds holding in top 10: 1 → 4 (+3)
160% more capital invested
Capital invested by funds: $1.08B → $2.8B (+$1.72B)
39% more funds holding
Funds holding: 238 → 331 (+93)
11% more repeat investments, than reductions
Existing positions increased: 93 | Existing positions reduced: 84
5.36% more ownership
Funds ownership: 93.62% → 98.98% (+5.4%)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Boston Partners
Boston,
Massachusetts
|
+$75.3M |
| 2 |
DCM
Driehaus Capital Management
Chicago,
Illinois
|
+$31.2M |
| 3 |
CCPM
Cooper Creek Partners Management
New York
|
+$30.1M |
| 4 |
Two Sigma Investments
New York
|
+$29.8M |
| 5 |
Fuller & Thaler Asset Management
San Mateo,
California
|
+$23.7M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Invesco
Atlanta,
Georgia
|
-$89.2M |
| 2 |
FCM
Frontier Capital Management
Boston,
Massachusetts
|
-$88.3M |
| 3 |
SCM
Shapiro Capital Management
Atlanta,
Georgia
|
-$32.4M |
| 4 |
DCM
Divisar Capital Management
San Francisco,
California
|
-$27.1M |
| 5 |
Dimensional Fund Advisors
Austin,
Texas
|
-$26.3M |
UCTT Hedge Fund Activity: Q1 2026 in Review
331 of the 8,187 institutional investors tracked by Wall St. Rank reported a position in Ultra Clean Holdings (UCTT) for Q1 2026, worth a combined $2.8B — up 160% from $1.08B a quarter earlier.
Buyers outnumbered sellers: 118 funds opened new UCTT positions and 21 closed out — a net gain of 97 holders — while 93 added to existing stakes and 84 trimmed.
The largest buyer was Boston Partners, opening a new position worth an estimated $75.3M. The largest seller was Invesco, cutting an estimated $89.2M.
- 331 institutional investors held Ultra Clean Holdings (UCTT) as of Q1 2026, up from 238 in Q4 2025.
- Funds reported $2.8B of Ultra Clean Holdings stock for Q1 2026, up 160% quarter-over-quarter.
- 118 funds opened new Ultra Clean Holdings positions in Q1 2026 and 21 closed out, a net change of +97 holders.
- The largest Ultra Clean Holdings buyer in Q1 2026 was Boston Partners, an estimated $75.3M added.
- The largest Ultra Clean Holdings seller in Q1 2026 was Invesco, an estimated $89.2M sold.
Based on aggregated 13F filings for Q1 2026.