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Of the 12 tracked institutions holding IOSP, 7 have a 3-year clone track record — 6 of them beat the S&P. Average holder's clone alpha: +5.4pt. It's a gauge of who owns the name, not just how many.
Among the 12 tracked institutional investors we monitor, IOSP (INNOSPEC INC) is held with a combined value of $663.92M across 8,941,785 shares. The largest holder is BlackRock, Inc. with a position worth $283.24M. 2 funds opened new positions in the most recent quarter. 7 funds increased their holdings. 3 funds reduced their position.
Total Institutional Value
$663.92M
Total Shares Held
8,941,785
Institutional Holders
12
Ranked by estimated dollars moved (share change × implied price). 13F data lags up to 45 days.
| # | Fund | Value↓ | Portfolio % | Change |
|---|---|---|---|---|
| 1 | BlackRock, Inc. | $283.24M | 0.00% | +5.9% |
| 2 | VANGUARD GROUP INC | $238.89M | 0.00% | -0.7% |
| 3 | STATE STREET CORP | $70.42M | 0.00% | +1.6% |
| 4 | AQR CAPITAL MANAGEMENT LLC | $22.79M | 0.01% | +16.4% |
| 5 | CITADEL ADVISORS LLC | $16.13M | 0.01% | +203.9% |
| 6 | Point72 Asset Management, L.P. | $12.18M | 0.02% | +74.2% |
| 7 | RENAISSANCE TECHNOLOGIES LLC | $8.68M | 0.01% | -1.2% |
| 8 | MILLENNIUM MANAGEMENT LLC | $4.49M | 0.00% | -88.5% |
| 9 | FMR LLC | $3.78M | 0.00% | +40.3% |
| 10 | PRICE T ROWE ASSOCIATES INC /MD/ | $2.32M | 0.00% | +12.1% |
As of the latest SEC 13F filings, BlackRock, Inc. is the largest institutional holder of IOSP with a position worth $283.24M, representing 0.00% of their portfolio. In total, 12 institutional investors hold IOSP with a combined value of $663.92M.
In the most recent quarter, 2 funds opened a new position in IOSP. Additionally, 7 increased their holdings and 3 reduced their positions.
Institutional investors hold $663.92M worth of IOSP stock across 12 positions. The largest institutional holder is BlackRock, Inc. with $283.24M in holdings.
A 13F filing is a quarterly report required by the SEC from institutional investment managers with over $100 million in assets. It discloses their holdings in U.S. equities. For IOSP, these filings reveal which major funds are accumulating or reducing positions, providing insights into institutional sentiment.
Get notified when hedge funds change their IOSP positions.
Alpha = the manager's 3-year clone return minus the S&P 500. A skilled roster is a stronger tell than a crowded one — though even skilled managers' edge doesn't reliably survive the 13F disclosure lag. Why →
Last Close
$85.63
2026-07-27
YTD
+12.3%
88% of 52-week range
