American Century Companies’s Innospec IOSP Stock Holding History

American Century Companies’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 Q1	$4.03M	Buy	55,234 +918	+2%	+$71.5K	﹤0.01%	1866
2025 Q4	$4.16M	Sell	54,316 -8,386	-13%	-$633K	﹤0.01%	1808
2025 Q3	$4.84M	Buy	62,702 +6,841	+12%	+$571K	﹤0.01%	1723
2025 Q2	$4.7M	Buy	55,861 +8,316	+17%	+$728K	﹤0.01%	1696
2025 Q1	$4.5M	Buy	47,545 +10,309	+28%	+$1.09M	﹤0.01%	1649
2024 Q4	$4.1M	Buy	37,236 +12,084	+48%	+$1.38M	﹤0.01%	1684
2024 Q3	$2.84M	Buy	25,152 +15,153	+152%	+$1.76M	﹤0.01%	1813
2024 Q2	$1.24M	Sell	9,999 -12,659	-56%	-$1.58M	﹤0.01%	2094
2024 Q1	$2.92M	Buy	22,658 +1,164	+5%	+$141K	﹤0.01%	1711
2023 Q4	$2.65M	Buy	21,494 +644	+3%	+$68.5K	﹤0.01%	1655
2023 Q3	$2.13M	Buy	20,850 +5,843	+39%	+$611K	﹤0.01%	1670
2023 Q2	$1.51M	Buy	15,007 +7,052	+89%	+$706K	﹤0.01%	1770
2023 Q1	$803K	Buy	7,955 +1,257	+19%	+$135K	﹤0.01%	1955
2022 Q4	$689K	Sell	6,698 -755	-10%	-$76.7K	﹤0.01%	1930
2022 Q3	$638K	Buy	7,453 +113	+2%	+$10.7K	﹤0.01%	1858
2022 Q2	$703K	Buy	7,340 +1,406	+24%	+$137K	﹤0.01%	1785
2022 Q1	$549K	Buy	5,934 +1,002	+20%	+$94.9K	﹤0.01%	1921
2021 Q4	$446K	Buy	4,932 +915	+23%	+$80.8K	﹤0.01%	1985
2021 Q3	$338K	Buy	4,017 +601	+18%	+$53.6K	﹤0.01%	2037
2021 Q2	$310K	Buy	3,416 +787	+30%	+$78K	﹤0.01%	2057
2021 Q1	$270K	Buy	+2,629	New	+$260K	﹤0.01%	1966
2018 Q2	–	Sell	-267,776	Closed	-$18.4M	–	1323
2018 Q1	$18.4M	Sell	267,776 -102,977	-28%	-$7.16M	0.02%	526
2017 Q4	$26.2M	Sell	370,753 -78,336	-17%	-$5.22M	0.03%	473
2017 Q3	$27.7M	Buy	449,089 +88,053	+24%	+$5.27M	0.03%	468
2017 Q2	$23.7M	Buy	361,036 +5,661	+2%	+$364K	0.02%	490
2017 Q1	$23M	Buy	355,375 +9,389	+3%	+$628K	0.02%	496
2016 Q4	$23.7M	Sell	345,986 -68,514	-17%	-$4.41M	0.03%	496
2016 Q3	$25.2M	Sell	414,500 -56,689	-12%	-$3.15M	0.03%	486
2016 Q2	$21.7M	Buy	471,189 +33,153	+8%	+$1.57M	0.02%	504
2016 Q1	$19M	Buy	438,036 +41,654	+11%	+$1.92M	0.02%	517
2015 Q4	$21.5M	Sell	396,382 -137,836	-26%	-$7.6M	0.03%	499
2015 Q3	$24.8M	Sell	534,218 -120,822	-18%	-$5.54M	0.03%	476
2015 Q2	$29.5M	Buy	+655,040	New	+$29.4M	0.03%	481

Other funds holding IOSP

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

Allspring Global Investments Charlotte, North Carolina $59.7B AUM 29.08% 1-Year Est. Return

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

Victory Capital Management San Antonio, Texas $156B AUM 27.51% 1-Year Est. Return

Nuveen Charlotte, North Carolina $369B AUM 31.66% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Two Sigma Investments New York $124B AUM 33.93% 1-Year Est. Return

American Century Companies's IOSP Position: Q1 2026 in Review

American Century Companies increased its Innospec (IOSP) stake by 1.7% in Q1 2026, buying an estimated $71.5K and bringing the position to 55,234 shares worth $4.03M. The position accounts for ﹤0.01% of the portfolio, ranked #1866.

American Century Companies first reported a position in IOSP in Q2 2015 and has held it in 33 quarters since. The position peaked at $29.5M in Q2 2015. 266 funds tracked by Wall St. Rank hold IOSP as of Q1 2026.

American Century Companies held 55,234 shares of Innospec worth $4.03M as of Q1 2026.
American Century Companies bought 918 Innospec shares in Q1 2026, an estimated $71.5K.
Innospec made up ﹤0.01% of American Century Companies's portfolio in Q1 2026, its #1866 holding.
American Century Companies first reported a position in Innospec in Q2 2015 and has held it in 33 quarters since.
American Century Companies's Innospec position peaked at $29.5M in Q2 2015.
266 funds tracked by Wall St. Rank held Innospec as of Q1 2026.

Based on American Century Companies's 13F filing for Q1 2026, filed 15 May 2026.