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IOSP — INNOSPEC INC

Reported value held$1.09B
Funds holding (latest)42
SectorIndustrials
Funds holding (Q2 2026)34
Institutional value$821.49M · 10.13M sh
New / Add / Cut / Exit2 / 18 / 12 / 3
Top-5 / Top-10 concentration67.0% / 82.6%
Institutional holdings change Accumulating +4.4% (+430.62K sh)
Institutional value change Up +16.3%

As of Q2 2026, 34 SEC-registered investment managers reported holding IOSP (INNOSPEC INC) in their latest 13F filings, with a combined reported value of $821.49M across 10.13M shares. That is +4.4% by share count (+430.62K shares) versus the previous quarter, while reported value moved +16.3%. Ownership is concentrated: the five largest holders account for 67.0% of reported value and the top ten for 82.6%.

Compared with the prior quarter, 2 opened new positions, 18 added to existing stakes, 12 trimmed, 3 exited entirely. 13F holdings are quarter-end snapshots, so these moves reflect positioning as of Q2 2026, not real-time trading.

IOSP is classified in the Industrials sector.

All figures on this page are computed from SEC Form 13F quarterly filings. 13F filers disclose long positions of $100,000 or more within 45 days of quarter end; short positions, options overlays and intra-quarter trades are not included, so treat the numbers as a quarterly snapshot of institutional ownership rather than real-time positioning.

FundQuarterSharesValuePortfolio WeightChange
BlackRock Inc history Q2 2026 4.38M $356.60M 0.01% Add
Vanguard Group history Q4 2025 3.12M $238.89M 0.00% Reduce
Geode Capital Management history Q2 2026 666.59K $54.26M 0.00% Add
Goldman Sachs Group history Q2 2026 662.21K $53.90M 0.01% Add
Two Sigma Investments history Q2 2026 568.71K $46.29M 0.04% Reduce
AQR Capital Management history Q2 2026 482.55K $39.27M 0.01% Add
JPMorgan Chase & Co history Q2 2026 370.57K $30.00M 0.00% New
Charles Schwab Investment Management history Q2 2026 355.66K $28.95M 0.00% Reduce
Royce & Associates history Q2 2026 308.73K $25.13M 0.20% Add
Northern Trust Corp history Q2 2026 303.04K $24.66M 0.00% Add
Bank of America Corp history Q2 2026 235.74K $19.19M 0.00% Reduce
Morgan Stanley history Q2 2026 230.79K $18.78M 0.00% Reduce
Renaissance Technologies history Q2 2026 185.00K $15.06M 0.02% Add
D. E. Shaw & Co history Q2 2026 165.75K $13.49M 0.01% Reduce
UBS Group AG history Q2 2026 154.00K $12.53M 0.00% Reduce
BNY Mellon history Q2 2026 137.26K $11.17M 0.00% Add
Norges Bank Investment Management history Q4 2025 139.20K $10.65M 0.00% Add
Janus Henderson Group history Q1 2026 133.27K $9.73M 0.01% Reduce
Principal Global Investors history Q2 2026 119.05K $9.69M 0.01% Reduce
Invesco Ltd history Q2 2026 118.43K $9.64M 0.00% Hold

View all 42 fund holders →

New Positions (Q2 2026)

Fully Exited (vs previous quarter)

Fund Position History — shares by quarter (top 20 funds)

FundQ3 2021Q4 2021Q1 2022Q2 2022Q3 2022Q4 2022Q1 2023Q2 2023Q3 2023Q4 2023Q1 2024Q2 2024Q3 2024Q4 2024Q1 2025Q2 2025Q3 2025Q4 2025Q1 2026Q2 2026
BlackRock Inc — — — — — — — — — — — — 3.90M 3.91M 3.75M 3.66M 3.63M 3.66M 3.88M 4.38M
Geode Capital Management 448.95K 425.43K 441.67K 437.27K 446.40K 461.22K 484.89K 543.52K 565.59K 591.74K 615.89K 652.44K 677.28K 692.07K 705.13K 719.60K 614.21K 609.22K 630.59K 666.59K
Goldman Sachs Group 191.87K 241.50K 307.47K 184.21K 97.30K 126.28K 141.86K 122.26K 283.93K 248.34K 254.81K 237.16K 148.58K 124.39K 132.40K 104.67K 282.64K 484.97K 492.01K 662.21K
Two Sigma Investments 82.23K 32.27K 17.37K 2.59K 5.80K 12.19K 43.26K 33.49K 21.93K 4.85K 7.07K 29.98K 25.59K 13.17K 78.45K 138.24K 148.21K 159.51K 593.04K 568.71K
AQR Capital Management 10.77K 22.02K 14.49K 10.71K 13.63K 13.78K 14.44K 17.67K 19.81K 18.44K 15.96K 24.23K 22.25K 15.88K 14.32K 72.02K 181.21K 268.15K 312.06K 482.55K
JPMorgan Chase & Co 99.62K 97.61K 104.80K 96.71K 98.12K 102.04K 99.09K 137.82K 133.33K 129.90K 149.20K 214.05K 266.69K 312.88K 273.01K 321.16K 320.98K 305.88K — 370.57K
Charles Schwab Investment Management 245.14K 256.64K 267.88K 277.24K 282.17K 280.13K 281.87K 286.50K 298.63K 307.49K 316.33K 325.04K 336.52K 352.58K 354.71K 356.18K 360.59K 373.54K 365.87K 355.66K
Royce & Associates 1.20M 1.35M 1.20M 1.07M 1.05M 870.74K 831.45K 857.29K 847.65K 824.12K 803.27K 764.43K 835.33K 777.71K 653.64K 627.50K 492.61K 305.23K 261.34K 308.73K
Northern Trust Corp 400.17K 394.75K 382.36K 397.00K 397.17K 399.91K 395.14K 401.31K 401.35K 401.42K 370.75K 362.02K 311.56K 327.48K 318.31K 302.50K 299.05K 274.69K 284.24K 303.04K
Bank of America Corp 234.41K 221.69K 230.26K 211.34K 217.91K 220.72K 210.98K 178.04K 182.74K 183.68K 186.13K 202.82K 226.22K 233.45K 243.69K 295.50K 375.33K 322.36K 290.77K 235.74K
Morgan Stanley 181.28K 113.00K 88.28K 215.06K 213.72K 203.28K 204.70K 265.11K 201.10K 219.41K 315.18K 237.48K 254.75K 237.88K 239.19K 263.83K 253.75K 243.53K 235.57K 230.79K
Renaissance Technologies 22.30K — — 26.50K 30.90K 18.00K 34.36K 30.80K — 2.60K — 9.20K 5.20K 4.80K 126.90K 146.60K 146.50K 120.30K 118.90K 185.00K
D. E. Shaw & Co 70.06K 61.97K 30.00K 6.95K 14.17K 17.98K 15.69K 22.33K 19.03K 10.01K 7.98K 7.22K 13.17K 38.03K 99.08K 171.74K 273.90K 309.93K 286.79K 165.75K
UBS Group AG 6.48K 15.56K 4.38K 588 1.01K 7.00K 11.89K 15.50K 28 57.41K 68.72K 15.09K 16.54K 84.67K 81.86K 106.27K 165.05K 142.06K 565.91K 154.00K
BNY Mellon 315.29K 300.17K 305.81K 290.25K 293.69K 282.20K 278.49K 290.75K 263.45K 263.06K 252.15K 258.29K 234.98K 237.62K 228.74K 231.01K 215.19K 137.83K 131.29K 137.26K
Principal Global Investors 171.02K 166.88K 165.52K 155.38K 153.79K 152.53K 149.57K 144.24K 137.15K 135.19K 133.11K 127.87K 125.07K 129.45K 132.49K 137.22K 119.94K 118.11K 120.48K 119.05K
Invesco Ltd 186.56K 163.99K 157.80K 130.09K 171.16K 168.90K 173.94K 171.20K 143.11K 287.05K 410.14K 394.13K 488.99K 452.16K 249.88K 223.76K 80.84K 104.64K 118.08K 118.43K
Citadel Advisors 43.61K 5.87K 11.55K 22.18K 3.46K 28.83K 3.45K — 3.10K 1.90K 7.61K 21.93K 22.87K 25.52K 76.44K 94.58K 83.39K 72.69K 220.88K 98.55K
PSP Investments 49.79K 50.20K 46.00K 46.00K 45.44K 45.05K 43.56K 44.14K 30.73K 51.60K 50.97K 54.86K 52.96K 62.13K 79.12K 84.96K 96.87K 85.71K 88.69K 84.58K
Fidelity Management & Research (FMR) 719.09K 87.56K 13.64K 13.59K 13.61K 13.70K 13.74K 25.64K 29.96K 29.78K 31.00K 33.27K 4.39K 2.05K 1.32K 1.99K 1.01K 36.92K 51.80K 82.76K

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