Calix
CALX
331 hedge funds and large institutions have $3.11B invested in Calix in 2025 Q4 according to their latest regulatory filings, with 59 funds opening new positions, 127 increasing their positions, 101 reducing their positions, and 35 closing their positions.
1,033% more call options, than puts
Call options by funds: $4.08M | Put options by funds: $360K
200% more funds holding in top 10
Funds holding in top 10: 1 → 3 (+2)
69% more first-time investments, than exits
New positions opened: 59 | Existing positions closed: 35
26% more repeat investments, than reductions
Existing positions increased: 127 | Existing positions reduced: 101
5% more funds holding
Funds holding: 314 → 331 (+17)
1.93% more ownership
Funds ownership: 86.75% → 88.68% (+1.9%)
11% less capital invested
Capital invested by funds: $3.48B → $3.11B (-$366M)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Fuller & Thaler Asset Management
San Mateo,
California
|
+$63.7M |
| 2 |
Westfield Capital Management
Boston,
Massachusetts
|
+$26.9M |
| 3 |
Alyeska Investment Group
Chicago,
Illinois
|
+$21.8M |
| 4 |
TI
Trexquant Investment
Stamford,
Connecticut
|
+$17.4M |
| 5 |
OAM
Oberweis Asset Management
Lisle,
Illinois
|
+$14.2M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Balyasny Asset Management
Chicago,
Illinois
|
-$34.1M |
| 2 |
T. Rowe Price Associates
Baltimore,
Maryland
|
-$31.7M |
| 3 |
Millennium Management
New York
|
-$30.5M |
| 4 |
DSCM
Divisadero Street Capital Management
Miami,
Florida
|
-$27.9M |
| 5 |
UBS Group
Zurich,
Switzerland
|
-$26.1M |
CALX Hedge Fund Activity: Q4 2025 in Review
331 of the 8,266 institutional investors tracked by Wall St. Rank reported a position in Calix (CALX) for Q4 2025, worth a combined $3.11B — down 11% from $3.48B a quarter earlier.
Buyers outnumbered sellers: 59 funds opened new CALX positions and 35 closed out — a net gain of 24 holders — while 127 added to existing stakes and 101 trimmed.
The largest buyer was Fuller & Thaler Asset Management, opening a new position worth an estimated $63.7M. The largest seller was Balyasny Asset Management, exiting entirely with an estimated $34.1M sold.
- 331 institutional investors held Calix (CALX) as of Q4 2025, up from 314 in Q3 2025.
- Funds reported $3.11B of Calix stock for Q4 2025, down 11% quarter-over-quarter.
- 59 funds opened new Calix positions in Q4 2025 and 35 closed out, a net change of +24 holders.
- The largest Calix buyer in Q4 2025 was Fuller & Thaler Asset Management, an estimated $63.7M added.
- The largest Calix seller in Q4 2025 was Balyasny Asset Management, an estimated $34.1M sold.
Based on aggregated 13F filings for Q4 2025.