Innospec
IOSP
266 hedge funds and large institutions have $1.82B invested in Innospec in 2026 Q1 according to their latest regulatory filings, with 41 funds opening new positions, 114 increasing their positions, 79 reducing their positions, and 30 closing their positions.
44% more repeat investments, than reductions
Existing positions increased: 114 | Existing positions reduced: 79
37% more first-time investments, than exits
New positions opened: 41 | Existing positions closed: 30
2% more funds holding
Funds holding: 260 → 266 (+6)
2.13% more ownership
Funds ownership: 98.07% → 100.2% (+2.1%)
2% less capital invested
Capital invested by funds: $1.86B → $1.82B (-$36.7M)
50% less funds holding in top 10
Funds holding in top 10: 2 → 1 (-1)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Two Sigma Investments
New York
|
+$33.8M |
| 2 |
UBS Group
Zurich,
Switzerland
|
+$33M |
| 3 |
Assenagon Asset Management
Senningerberg,
Luxembourg
|
+$24.3M |
| 4 |
BlackRock
New York
|
+$16.9M |
| 5 |
Citadel Advisors
Miami,
Florida
|
+$11.5M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
WHG
Westwood Holdings Group
Dallas,
Texas
|
-$37.6M |
| 2 |
Millennium Management
New York
|
-$36.7M |
| 3 |
MVP
Medina Value Partners
Los Angeles,
California
|
-$29M |
| 4 |
Walleye Capital
New York
|
-$7.96M |
| 5 |
Victory Capital Management
San Antonio,
Texas
|
-$6.62M |
IOSP Hedge Fund Activity: Q1 2026 in Review
266 of the 8,187 institutional investors tracked by Wall St. Rank reported a position in Innospec (IOSP) for Q1 2026, worth a combined $1.82B — down 2% from $1.86B a quarter earlier.
Buyers outnumbered sellers: 41 funds opened new IOSP positions and 30 closed out — a net gain of 11 holders — while 114 added to existing stakes and 79 trimmed.
The largest buyer was Two Sigma Investments, adding an estimated $33.8M. The largest seller was Westwood Holdings Group, exiting entirely with an estimated $37.6M sold.
- 266 institutional investors held Innospec (IOSP) as of Q1 2026, up from 260 in Q4 2025.
- Funds reported $1.82B of Innospec stock for Q1 2026, down 2% quarter-over-quarter.
- 41 funds opened new Innospec positions in Q1 2026 and 30 closed out, a net change of +11 holders.
- The largest Innospec buyer in Q1 2026 was Two Sigma Investments, an estimated $33.8M added.
- The largest Innospec seller in Q1 2026 was Westwood Holdings Group, an estimated $37.6M sold.
Based on aggregated 13F filings for Q1 2026.