Octave Specialty Group
OSG
130 hedge funds and large institutions have $539M invested in Octave Specialty Group in 2025 Q3 according to their latest regulatory filings, with 23 funds opening new positions, 43 increasing their positions, 46 reducing their positions, and 37 closing their positions.
870% more call options, than puts
Call options by funds: $41.8M | Put options by funds: $4.31M
106% more capital invested
Capital invested by funds: $262M → $539M (+$277M)
1.5% more ownership
Funds ownership: 79.62% → 81.13% (+1.5%)
7% less repeat investments, than reductions
Existing positions increased: 43 | Existing positions reduced: 46
11% less funds holding
Funds holding: 146 → 130 (-16)
17% less funds holding in top 10
Funds holding in top 10: 6 → 5 (-1)
38% less first-time investments, than exits
New positions opened: 23 | Existing positions closed: 37
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
WSL
Western Standard LLC
Los Angeles,
California
|
+$22.3M |
| 2 |
Manulife (Manufacturers Life Insurance)
Canada,
Ontario, Canada
|
+$10M |
| 3 |
CM
Caption Management
Oklahoma City,
Oklahoma
|
+$7.98M |
| 4 |
CGIC
Continental General Insurance Company
Austin,
Texas
|
+$7.18M |
| 5 |
GJL
Gendell Jeffrey L
|
+$5.63M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Citadel Advisors
Miami,
Florida
|
-$8M |
| 2 |
Hotchkis & Wiley Capital Management
Los Angeles,
California
|
-$5.63M |
| 3 |
Susquehanna International Group
Bala Cynwyd,
Pennsylvania
|
-$5.63M |
| 4 |
American Century Companies
Kansas City,
Missouri
|
-$2.58M |
| 5 |
Group One Trading
Chicago,
Illinois
|
-$2.55M |
OSG Hedge Fund Activity: Q3 2025 in Review
130 of the 7,634 institutional investors tracked by Wall St. Rank reported a position in Octave Specialty Group (OSG) for Q3 2025, worth a combined $539M — up 106% from $262M a quarter earlier.
Sellers outnumbered buyers: 37 funds closed out of OSG and 23 opened new positions — a net loss of 14 holders — while 46 trimmed existing stakes and 43 added.
The largest buyer was Western Standard LLC, opening a new position worth an estimated $22.3M. The largest seller was Citadel Advisors, cutting an estimated $8M.
- 130 institutional investors held Octave Specialty Group (OSG) as of Q3 2025, down from 146 in Q2 2025.
- Funds reported $539M of Octave Specialty Group stock for Q3 2025, up 106% quarter-over-quarter.
- 23 funds opened new Octave Specialty Group positions in Q3 2025 and 37 closed out, a net change of -14 holders.
- The largest Octave Specialty Group buyer in Q3 2025 was Western Standard LLC, an estimated $22.3M added.
- The largest Octave Specialty Group seller in Q3 2025 was Citadel Advisors, an estimated $8M sold.
Based on aggregated 13F filings for Q3 2025.