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PDT Partners’s Innospec IOSP Stock Holding History

PDT Partners’s Portfolio IOSP Stock Details IOSP Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$2.54M Sell
31,176
-3,400
-10% -$269K 0.13% 215
2026
Q1 		$2.52M Sell
34,576
-8,300
-19% -$646K 0.15% 214
2025
Q4 		$3.28M Hold
42,876
– – 0.21% 174
2025
Q3 		$3.31M Buy
42,876
+29,433
+219% +$2.46M 0.21% 169
2025
Q2 		$1.13M Buy
+13,443
New +$1.18M 0.06% 401
2024
Q4 		– Sell
-6,854
Closed -$775K – 769
2024
Q3 		$775K Sell
6,854
-8,645
-56% -$1.01M 0.07% 417
2024
Q2 		$1.92M Buy
15,499
+2,333
+18% +$292K 0.18% 210
2024
Q1 		$1.7M Buy
13,166
+1,921
+17% +$233K 0.16% 224
2023
Q4 		$1.39M Buy
11,245
+110
+1% +$11.7K 0.15% 233
2023
Q3 		$1.14M Sell
11,135
-22
-0.2% -$2.3K 0.14% 258
2023
Q2 		$1.12M Buy
+11,157
New +$1.12M 0.15% 229
2020
Q3 		– Sell
-3,427
Closed -$265K – 786
2020
Q2 		$265K Buy
+3,427
New +$251K 0.02% 544
2016
Q2 		– Sell
-12,144
Closed -$527K – 497
2016
Q1 		$527K Buy
+12,144
New +$561K 0.03% 406
2015
Q2 		– Sell
-8,160
Closed -$379K – 1477
2015
Q1 		$379K Buy
+8,160
New +$350K 0.01% 1103
2014
Q4 		– Sell
-12,322
Closed -$442K – 855
2014
Q3 		$442K Buy
+12,322
New +$500K 0.01% 979
2013
Q3 		– Sell
-5,483
Closed -$220K – 1602
2013
Q2 		$220K Buy
+5,483
New +$229K 0.01% 1345

Other funds holding IOSP

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Allspring Global Investments
Allspring Global Investments Charlotte, North Carolina $65.2B AUM 39.42% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Nuveen
Nuveen Charlotte, North Carolina $419B AUM 43.02% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Goldman Sachs
Goldman Sachs New York $1.15T AUM 47.82% 1-Year Est. Return
Victory Capital Management
Victory Capital Management San Antonio, Texas $178B AUM 37.23% 1-Year Est. Return

PDT Partners's IOSP Position: Q2 2026 in Review

PDT Partners reduced its Innospec (IOSP) stake by 9.8% in Q2 2026, selling an estimated $269K and leaving 31,176 shares worth $2.54M. The position accounts for 0.13% of the portfolio, ranked #215.

PDT Partners first reported a position in IOSP in Q2 2013 and has held it in 16 quarters since. The position peaked at $3.31M in Q3 2025. 281 funds tracked by Wall St. Rank hold IOSP as of Q2 2026.

  • PDT Partners held 31,176 shares of Innospec worth $2.54M as of Q2 2026.
  • PDT Partners sold 3,400 Innospec shares in Q2 2026, an estimated $269K.
  • Innospec made up 0.13% of PDT Partners's portfolio in Q2 2026, its #215 holding.
  • PDT Partners first reported a position in Innospec in Q2 2013 and has held it in 16 quarters since.
  • PDT Partners's Innospec position peaked at $3.31M in Q3 2025.
  • 281 funds tracked by Wall St. Rank held Innospec as of Q2 2026.

Based on PDT Partners's 13F filing for Q2 2026, filed 14 Aug 2026.