American Century Companies’s Aspen Aerogels ASPN Stock Holding History

Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake
Trade Value Portfolio Weight Portfolio Position
2026
Q2
$15.9M Buy
2,510,042
+1,262,259
+101% +$6.19M 0.01% 1387
2026
Q1
$4.27M Buy
1,247,783
+89,805
+8% +$303K ﹤0.01% 1843
2025
Q4
$3.28M Buy
1,157,978
+686,666
+146% +$3.54M ﹤0.01% 1903
2025
Q3
$3.28M Buy
471,312
+456,268
+3,033% +$3.22M ﹤0.01% 1891
2025
Q2
$89.1K Buy
+15,044
New +$86.5K ﹤0.01% 2799
2025
Q1
Sell
-1,003,184
Closed -$11.9M 2890
2024
Q4
$11.9M Sell
1,003,184
-487,939
-33% -$8.32M 0.01% 1270
2024
Q3
$41.3M Buy
1,491,123
+720,394
+93% +$18M 0.02% 688
2024
Q2
$18.4M Buy
770,729
+654,350
+562% +$15.4M 0.01% 992
2024
Q1
$2.05M Buy
116,379
+43,094
+59% +$635K ﹤0.01% 1879
2023
Q4
$1.16M Buy
73,285
+40,921
+126% +$423K ﹤0.01% 2001
2023
Q3
$278K Buy
32,364
+12,141
+60% +$86.3K ﹤0.01% 2475
2023
Q2
$160K Buy
+20,223
New +$141K ﹤0.01% 2579
2022
Q1
Sell
-28,528
Closed -$1.42M 2285
2021
Q4
$1.42M Buy
+28,528
New +$1.5M ﹤0.01% 1502

Other funds holding ASPN

American Century Companies's ASPN Position: Q2 2026 in Review

American Century Companies increased its Aspen Aerogels (ASPN) stake by 101% in Q2 2026, buying an estimated $6.19M and bringing the position to 2,510,042 shares worth $15.9M. The position accounts for 0.01% of the portfolio, ranked #1387.

American Century Companies first reported a position in ASPN in Q4 2021 and has held it in 13 quarters since. The position peaked at $41.3M in Q3 2024. 180 funds tracked by Wall St. Rank hold ASPN as of Q2 2026.

  • American Century Companies held 2,510,042 shares of Aspen Aerogels worth $15.9M as of Q2 2026.
  • American Century Companies bought 1,262,259 Aspen Aerogels shares in Q2 2026, an estimated $6.19M.
  • Aspen Aerogels made up 0.01% of American Century Companies's portfolio in Q2 2026, its #1387 holding.
  • American Century Companies first reported a position in Aspen Aerogels in Q4 2021 and has held it in 13 quarters since.
  • American Century Companies's Aspen Aerogels position peaked at $41.3M in Q3 2024.
  • 180 funds tracked by Wall St. Rank held Aspen Aerogels as of Q2 2026.

Based on American Century Companies's 13F filing for Q2 2026, filed 12 Aug 2026.