BlackRock
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BlackRock’s Aspen Aerogels ASPN Stock Holding History

BlackRock’s Portfolio ASPN Stock Details ASPN Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$16.2M Sell
4,743,076
-186,163
-4% -$628K ﹤0.01% 3205
2025
Q4 		$13.9M Sell
4,929,239
-48,319
-1% -$249K ﹤0.01% 3291
2025
Q3 		$34.6M Buy
4,977,558
+372
+0% +$2.62K ﹤0.01% 2741
2025
Q2 		$29.5M Buy
4,977,186
+17,014
+0.3% +$97.9K ﹤0.01% 2798
2025
Q1 		$31.7M Sell
4,960,172
-41,033
-0.8% -$396K ﹤0.01% 2647
2024
Q4 		$59.4M Buy
5,001,205
+336,880
+7% +$5.74M ﹤0.01% 2349
2024
Q3 		$129M Buy
4,664,325
+171,929
+4% +$4.3M ﹤0.01% 1936
2024
Q2 		$107M Buy
4,492,396
+429,479
+11% +$10.1M ﹤0.01% 1980
2024
Q1 		$71.5M Buy
4,062,917
+7,931
+0.2% +$117K ﹤0.01% 2249
2023
Q4 		$64M Buy
4,054,986
+181,279
+5% +$1.87M ﹤0.01% 2332
2023
Q3 		$33.3M Buy
3,873,707
+21,296
+0.6% +$151K ﹤0.01% 2641
2023
Q2 		$30.4M Buy
3,852,411
+364,579
+10% +$2.54M ﹤0.01% 2782
2023
Q1 		$26M Buy
3,487,832
+1,086,394
+45% +$10.8M ﹤0.01% 2837
2022
Q4 		$28.3M Buy
2,401,438
+482,454
+25% +$5.51M ﹤0.01% 2841
2022
Q3 		$17.7M Buy
1,918,984
+142,611
+8% +$1.73M ﹤0.01% 3103
2022
Q2 		$17.6M Buy
1,776,373
+244,791
+16% +$4.94M ﹤0.01% 3149
2022
Q1 		$52.8M Sell
1,531,582
-21,008
-1% -$682K ﹤0.01% 2550
2021
Q4 		$77.3M Buy
1,552,590
+144,291
+10% +$7.6M ﹤0.01% 2378
2021
Q3 		$64.8M Sell
1,408,299
-166,273
-11% -$6.59M ﹤0.01% 2495
2021
Q2 		$47.1M Sell
1,574,572
-282,176
-15% -$5.76M ﹤0.01% 2739
2021
Q1 		$37.8M Buy
1,856,748
+55,774
+3% +$1.18M ﹤0.01% 2805
2020
Q4 		$30.1M Buy
1,800,974
+347,880
+24% +$4.57M ﹤0.01% 2791
2020
Q3 		$15.9M Buy
1,453,094
+61,031
+4% +$483K ﹤0.01% 2992
2020
Q2 		$9.16M Buy
1,392,063
+892,970
+179% +$5.73M ﹤0.01% 3230
2020
Q1 		$3.06M Buy
499,093
+9,740
+2% +$79.1K ﹤0.01% 3528
2019
Q4 		$3.8M Sell
489,353
-3,930
-0.8% -$27.1K ﹤0.01% 3579
2019
Q3 		$2.92M Sell
493,283
-9,425
-2% -$59.9K ﹤0.01% 3638
2019
Q2 		$3.58M Buy
502,708
+105,803
+27% +$480K ﹤0.01% 3612
2019
Q1 		$1.01M Sell
396,905
-17,397
-4% -$51.7K ﹤0.01% 3909
2018
Q4 		$883K Buy
414,302
+27,783
+7% +$94.1K ﹤0.01% 3930
2018
Q3 		$1.77M Sell
386,519
-4,633
-1% -$22.6K ﹤0.01% 3818
2018
Q2 		$1.92M Buy
391,152
+6,345
+2% +$30.1K ﹤0.01% 3757
2018
Q1 		$1.64M Sell
384,807
-38,142
-9% -$180K ﹤0.01% 3731
2017
Q4 		$2.06M Sell
422,949
-33,774
-7% -$157K ﹤0.01% 3688
2017
Q3 		$1.99M Sell
456,723
-1,583
-0.3% -$6.92K ﹤0.01% 3706
2017
Q2 		$2.04M Sell
458,306
-23,061
-5% -$97.4K ﹤0.01% 3680
2017
Q1 		$2M Buy
481,367
+479,719
+29,109% +$2.04M ﹤0.01% 3653
2016
Q4 		$7K Sell
1,648
-707
-30% -$3.44K ﹤0.01% 3459
2016
Q3 		$14K Hold
2,355
– – ﹤0.01% 3346
2016
Q2 		$12K Buy
+2,355
New +$10.3K ﹤0.01% 3376

Other funds holding ASPN

KL
KIM LLC Wichita, Kansas $976M AUM 0.91% 1-Year Est. Return
OCMI
Oaktop Capital Management II Chatham, New Jersey $1.34B AUM 114.5% 1-Year Est. Return
NIM
Needham Investment Management New York $1.96B AUM 101.23% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
GKFF
George Kaiser Family Foundation Tulsa, Oklahoma $883M AUM 21.04% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return
GS
Gagnon Securities New York $433M AUM 29.08% 1-Year Est. Return
RHJA
Rice Hall James & Associates San Diego, California $1.8B AUM 36.16% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

BlackRock's ASPN Position: Q1 2026 in Review

BlackRock reduced its Aspen Aerogels (ASPN) stake by 3.8% in Q1 2026, selling an estimated $628K and leaving 4,743,076 shares worth $16.2M. The position accounts for ﹤0.01% of the portfolio, ranked #3205.

BlackRock first reported a position in ASPN in Q2 2016 and has held it in 40 quarters since. The position peaked at $129M in Q3 2024. 166 funds tracked by Wall St. Rank hold ASPN as of Q1 2026.

  • BlackRock held 4,743,076 shares of Aspen Aerogels worth $16.2M as of Q1 2026.
  • BlackRock sold 186,163 Aspen Aerogels shares in Q1 2026, an estimated $628K.
  • Aspen Aerogels made up ﹤0.01% of BlackRock's portfolio in Q1 2026, its #3205 holding.
  • BlackRock first reported a position in Aspen Aerogels in Q2 2016 and has held it in 40 quarters since.
  • BlackRock's Aspen Aerogels position peaked at $129M in Q3 2024.
  • 166 funds tracked by Wall St. Rank held Aspen Aerogels as of Q1 2026.

Based on BlackRock's 13F filing for Q1 2026, filed 13 May 2026.