Octave Specialty Group
OSG
144 hedge funds and large institutions have $270M invested in Octave Specialty Group in 2025 Q4 according to their latest regulatory filings, with 31 funds opening new positions, 25 increasing their positions, 69 reducing their positions, and 15 closing their positions.
667% more call options, than puts
Call options by funds: $30M | Put options by funds: $3.91M
107% more first-time investments, than exits
New positions opened: 31 | Existing positions closed: 15
11% more funds holding
Funds holding: 130 → 144 (+14)
1.91% less ownership
Funds ownership: 81.13% → 79.21% (-1.9%)
40% less funds holding in top 10
Funds holding in top 10: 5 → 3 (-2)
50% less capital invested
Capital invested by funds: $539M → $270M (-$269M)
64% less repeat investments, than reductions
Existing positions increased: 25 | Existing positions reduced: 69
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Morgan Stanley
New York
|
+$6.36M |
| 2 |
WHCM
Wolf Hill Capital Management
Greenwich,
Connecticut
|
+$6.25M |
| 3 |
Jane Street
New York
|
+$5.74M |
| 4 |
EIM
Essex Investment Management
Boston,
Massachusetts
|
+$3.51M |
| 5 |
Russell Investments Group
London,
United Kingdom
|
+$2.92M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
CGIC
Continental General Insurance Company
Austin,
Texas
|
-$17.3M |
| 2 |
Fidelity Investments
Boston,
Massachusetts
|
-$13M |
| 3 |
Manulife (Manufacturers Life Insurance)
Canada,
Ontario, Canada
|
-$10.2M |
| 4 |
Deutsche Bank
Frankfurt Am Main Ge,
Germany
|
-$4.33M |
| 5 |
Dimensional Fund Advisors
Austin,
Texas
|
-$3.89M |
OSG Hedge Fund Activity: Q4 2025 in Review
144 of the 8,261 institutional investors tracked by Wall St. Rank reported a position in Octave Specialty Group (OSG) for Q4 2025, worth a combined $270M — down 50% from $539M a quarter earlier.
Buyers outnumbered sellers: 31 funds opened new OSG positions and 15 closed out — a net gain of 16 holders — while 25 added to existing stakes and 69 trimmed.
The largest buyer was Morgan Stanley, adding an estimated $6.36M. The largest seller was Continental General Insurance Company, exiting entirely with an estimated $17.3M sold.
- 144 institutional investors held Octave Specialty Group (OSG) as of Q4 2025, up from 130 in Q3 2025.
- Funds reported $270M of Octave Specialty Group stock for Q4 2025, down 50% quarter-over-quarter.
- 31 funds opened new Octave Specialty Group positions in Q4 2025 and 15 closed out, a net change of +16 holders.
- The largest Octave Specialty Group buyer in Q4 2025 was Morgan Stanley, an estimated $6.36M added.
- The largest Octave Specialty Group seller in Q4 2025 was Continental General Insurance Company, an estimated $17.3M sold.
Based on aggregated 13F filings for Q4 2025.