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NEEDHAM INVESTMENT MANAGEMENT LLC
> ASPN
| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 12/31/2022 | ASPEN AEROGELS INC | ASPN | 1,532,834 | 549,734 | 18,072,113,000 | 18,063,048,000 | $11,790.00 |
| 09/30/2022 | ASPEN AEROGELS INC | ASPN | 983,100 | 298,600 | 9,065,000 | 2,302,000 | $9.22 |
| 06/30/2022 | ASPEN AEROGELS INC | ASPN | 684,500 | 23,000 | 6,763,000 | -16,046,000 | $9.88 |
| 03/31/2022 | ASPEN AEROGELS INC | ASPN | 661,500 | -32,500 | 22,809,000 | -11,745,000 | $34.48 |
| 12/31/2021 | ASPEN AEROGELS INC | ASPN | 694,000 | -426,500 | 34,554,000 | 1,028,000 | $49.79 |
| 06/30/2021 | ASPEN AEROGELS INC | ASPN | 1,120,500 | 17,500 | 33,526,000 | 11,091,000 | $29.92 |
| 03/31/2021 | ASPEN AEROGELS INC | ASPN | 1,103,000 | 171,600 | 22,435,000 | 6,890,000 | $20.34 |
| 12/31/2020 | ASPEN AEROGELS INC | ASPN | 931,400 | -400,506 | 15,545,000 | 961,000 | $16.69 |
| 09/30/2020 | ASPEN AEROGELS INC | ASPN | 1,331,906 | 120,506 | 14,584,000 | 6,613,000 | $10.95 |
| 06/30/2020 | ASPEN AEROGELS INC | ASPN | 1,211,400 | 81,400 | 7,971,000 | 1,033,000 | $6.58 |
| 03/31/2020 | ASPEN AEROGELS INC | ASPN | 1,130,000 | 225,350 | 6,938,000 | -82,000 | $6.14 |
| 12/31/2019 | ASPEN AEROGELS INC | ASPN | 904,650 | 17,000 | 7,020,000 | 1,765,000 | $7.76 |
| 09/30/2019 | ASPEN AEROGELS INC | ASPN | 887,650 | 0 | 5,255,000 | -1,074,000 | $5.92 |
| 06/30/2019 | ASPEN AEROGELS INC | ASPN | 887,650 | -242,750 | 6,329,000 | 3,446,000 | $7.13 |
| 03/31/2019 | ASPEN AEROGELS INC | ASPN | 1,130,400 | 0 | 2,883,000 | 475,000 | $2.55 |
| 12/31/2018 | ASPEN AEROGELS INC | ASPN | 1,130,400 | 345,400 | 2,408,000 | -1,179,000 | $2.13 |
| 09/30/2018 | ASPEN AEROGELS INC | ASPN | 785,000 | 241,200 | 3,587,000 | 922,000 | $4.57 |
| 06/30/2018 | ASPEN AEROGELS INC | ASPN | 543,800 | -34,050 | 2,665,000 | 197,000 | $4.90 |
| 03/31/2018 | ASPEN AEROGELS INC | ASPN | 577,850 | -22,150 | 2,468,000 | -460,000 | $4.27 |
| 12/31/2017 | ASPEN AEROGELS INC | ASPN | 600,000 | 165,000 | 2,928,000 | 1,036,000 | $4.88 |
| 09/30/2017 | ASPEN AEROGELS INC | ASPN | 435,000 | 92,500 | 1,892,000 | 368,000 | $4.35 |
| 06/30/2017 | ASPEN AEROGELS INC | ASPN | 342,500 | 0 | 1,524,000 | 102,000 | $4.45 |
| 03/31/2017 | ASPEN AEROGELS INC | ASPN | 342,500 | 77,500 | 1,422,000 | 327,000 | $4.15 |
| 12/31/2016 | ASPEN AEROGELS INC | ASPN | 265,000 | 199,800 | 1,095,000 | 706,000 | $4.13 |
| 09/30/2016 | ASPEN AEROGELS INC | ASPN | 65,200 | 25,000 | 389,000 | 189,000 | $5.97 |
| 06/30/2016 | ASPEN AEROGELS INC | ASPN | 40,200 | 40,200 | 200,000 | 200,000 | $4.98 |
| 03/31/2016 | ASPEN AEROGELS INC | ASPN | 35,200 | 35,200 | 158,000 | 158,000 | $4.49 |
| 12/31/2015 | ASPEN AEROGELS INC | ASPN | 35,200 | 35,200 | 214,000 | 214,000 | $6.08 |
| 09/30/2015 | ASPEN AEROGELS INC | ASPN | 35,200 | 35,200 | 264,000 | 264,000 | $7.50 |
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