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NEEDHAM INVESTMENT MANAGEMENT LLC
> GVP
| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 12/31/2022 | GSE SYSTEMS INC | GVP | 1,500,000 | 0 | 1,080,000,000 | 1,078,650,000 | $720.00 |
| 09/30/2022 | GSE SYSTEMS INC | GVP | 1,500,000 | 0 | 1,350,000 | -525,000 | $0.90 |
| 06/30/2022 | GSE SYSTEMS INC | GVP | 1,500,000 | 0 | 1,875,000 | -1,245,000 | $1.25 |
| 03/31/2022 | GSE SYSTEMS INC | GVP | 1,500,000 | 136,000 | 3,120,000 | 788,000 | $2.08 |
| 12/31/2021 | GSE SYSTEMS INC | GVP | 1,364,000 | 330,975 | 2,332,440 | 483,440 | $1.71 |
| 06/30/2021 | GSE SYSTEMS INC | GVP | 1,033,025 | -18,100 | 1,849,000 | 62,000 | $1.79 |
| 03/31/2021 | GSE SYSTEMS INC | GVP | 1,051,125 | -30,529 | 1,787,000 | 359,000 | $1.70 |
| 12/31/2020 | GSE SYSTEMS INC | GVP | 1,081,654 | 5,000 | 1,428,000 | 308,000 | $1.32 |
| 09/30/2020 | GSE SYSTEMS INC | GVP | 1,076,654 | 0 | 1,120,000 | 33,000 | $1.04 |
| 06/30/2020 | GSE SYSTEMS INC | GVP | 1,076,654 | -24,029 | 1,087,000 | 64,000 | $1.01 |
| 03/31/2020 | GSE SYSTEMS INC | GVP | 1,100,683 | 0 | 1,023,000 | -793,000 | $0.93 |
| 12/31/2019 | GSE SYSTEMS INC | GVP | 1,100,683 | 78,183 | 1,817,000 | 28,000 | $1.65 |
| 09/30/2019 | GSE SYSTEMS INC | GVP | 1,022,500 | -97,500 | 1,789,000 | -832,000 | $1.75 |
| 06/30/2019 | GSE SYSTEMS INC | GVP | 1,120,000 | 0 | 2,621,000 | -515,000 | $2.34 |
| 03/31/2019 | GSE SYSTEMS INC | GVP | 1,120,000 | 0 | 3,136,000 | 784,000 | $2.80 |
| 12/31/2018 | GSE SYSTEMS INC | GVP | 1,120,000 | 0 | 2,352,000 | -1,680,000 | $2.10 |
| 09/30/2018 | GSE SYSTEMS INC | GVP | 1,120,000 | 0 | 4,032,000 | 392,000 | $3.60 |
| 06/30/2018 | GSE SYSTEMS INC | GVP | 1,120,000 | 0 | 3,640,000 | 0 | $3.25 |
| 03/31/2018 | GSE SYSTEMS INC | GVP | 1,120,000 | 0 | 3,640,000 | 0 | $3.25 |
| 12/31/2017 | GSE SYSTEMS INC | GVP | 1,120,000 | 0 | 3,640,000 | -336,000 | $3.25 |
| 09/30/2017 | GSE SYSTEMS INC | GVP | 1,120,000 | 50,000 | 3,976,000 | 659,000 | $3.55 |
| 06/30/2017 | GSE SYSTEMS INC | GVP | 1,070,000 | 52,500 | 3,317,000 | -143,000 | $3.10 |
| 03/31/2017 | GSE SYSTEMS INC | GVP | 1,017,500 | 57,500 | 3,460,000 | 100,000 | $3.40 |
| 12/31/2016 | GSE SYSTEMS INC | GVP | 960,000 | 42,390 | 3,360,000 | 709,000 | $3.50 |
| 09/30/2016 | GSE SYSTEMS INC | GVP | 917,610 | 42,610 | 2,651,000 | 700,000 | $2.89 |
| 06/30/2016 | GSE SYSTEMS INC | GVP | 875,000 | 875,000 | 1,951,000 | 1,951,000 | $2.23 |
| 03/31/2016 | GSE SYSTEMS INC | GVP | 680,000 | 680,000 | 1,856,000 | 1,856,000 | $2.73 |
| 12/31/2015 | GSE SYSTEMS INC | GVP | 665,000 | 665,000 | 1,596,000 | 1,596,000 | $2.40 |
| 09/30/2015 | GSE SYSTEMS INC | GVP | 610,000 | 610,000 | 909,000 | 909,000 | $1.49 |
| 06/30/2015 | GSE SYSTEMS INC | GVP | 550,000 | 550,000 | 853,000 | 853,000 | $1.55 |
| 03/31/2015 | GSE SYSTEMS INC | GVP | 467,760 | 467,760 | 702,000 | 702,000 | $1.50 |
| 12/31/2014 | GSE SYSTEMS INC | GVP | 435,000 | 435,000 | 692,000 | 692,000 | $1.59 |
| 09/30/2014 | GSE SYSTEMS INC | GVP | 398,500 | 398,500 | 622,000 | 622,000 | $1.56 |
| 06/30/2014 | GSE SYSTEMS INC | GVP | 25,000 | 25,000 | 42,000 | 42,000 | $1.68 |
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