Olin
370 hedge funds and large institutions have $2.58B invested in Olin in 2025 Q3 according to their latest regulatory filings, with 77 funds opening new positions, 104 increasing their positions, 129 reducing their positions, and 57 closing their positions.
183% more call options, than puts
Call options by funds: $39.7M | Put options by funds: $14M
35% more first-time investments, than exits
New positions opened: 77 | Existing positions closed: 57
23% more capital invested
Capital invested by funds: $2.1B → $2.58B (+$478M)
5% more funds holding
Funds holding: 352 → 370 (+18)
0.51% less ownership
Funds ownership: 90.44% → 89.94% (-0.51%)
19% less repeat investments, than reductions
Existing positions increased: 104 | Existing positions reduced: 129
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Millennium Management
New York
|
+$50.5M |
| 2 |
SAIG
Semper Augustus Investments Group
Highlands Ranch,
Colorado
|
+$25M |
| 3 |
Amundi
Paris,
France
|
+$20.9M |
| 4 |
AQR Capital Management
Greenwich,
Connecticut
|
+$17.9M |
| 5 |
Arrowstreet Capital
Boston,
Massachusetts
|
+$16M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
ICP
Ilex Capital Partners
London,
United Kingdom
|
-$55.3M |
| 2 |
Fidelity Investments
Boston,
Massachusetts
|
-$39M |
| 3 |
UBS Group
Zurich,
Switzerland
|
-$20.1M |
| 4 |
WP
Woodline Partners
San Francisco,
California
|
-$15.9M |
| 5 |
Qube Research & Technologies (QRT)
London,
United Kingdom
|
-$15.5M |
OLN Hedge Fund Activity: Q3 2025 in Review
370 of the 7,640 institutional investors tracked by Wall St. Rank reported a position in Olin (OLN) for Q3 2025, worth a combined $2.58B — up 23% from $2.1B a quarter earlier.
Buyers outnumbered sellers: 77 funds opened new OLN positions and 57 closed out — a net gain of 20 holders — while 104 added to existing stakes and 129 trimmed.
The largest buyer was Millennium Management, adding an estimated $50.5M. The largest seller was Ilex Capital Partners, cutting an estimated $55.3M.
- 370 institutional investors held Olin (OLN) as of Q3 2025, up from 352 in Q2 2025.
- Funds reported $2.58B of Olin stock for Q3 2025, up 23% quarter-over-quarter.
- 77 funds opened new Olin positions in Q3 2025 and 57 closed out, a net change of +20 holders.
- The largest Olin buyer in Q3 2025 was Millennium Management, an estimated $50.5M added.
- The largest Olin seller in Q3 2025 was Ilex Capital Partners, an estimated $55.3M sold.
Based on aggregated 13F filings for Q3 2025.