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NEEDHAM INVESTMENT MANAGEMENT LLC
> PDFS
| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 12/31/2022 | PDF SOLUTIONS INC | PDFS | 698,990 | -91,010 | 19,935,195,000 | 19,915,816,000 | $28,520.00 |
| 09/30/2022 | PDF SOLUTIONS INC | PDFS | 790,000 | -66,511 | 19,379,000 | 956,000 | $24.53 |
| 06/30/2022 | PDF SOLUTIONS INC | PDFS | 856,511 | -10,820 | 18,423,000 | -5,750,000 | $21.51 |
| 03/31/2022 | PDF SOLUTIONS INC | PDFS | 867,331 | -88,059 | 24,173,000 | -6,199,000 | $27.87 |
| 12/31/2021 | PDF SOLUTIONS INC | PDFS | 955,390 | -563,610 | 30,372,000 | 2,756,000 | $31.79 |
| 06/30/2021 | PDF SOLUTIONS INC | PDFS | 1,519,000 | 205,000 | 27,616,000 | 4,253,000 | $18.18 |
| 03/31/2021 | PDF SOLUTIONS INC | PDFS | 1,314,000 | 340,000 | 23,363,000 | 2,325,000 | $17.78 |
| 12/31/2020 | PDF SOLUTIONS INC | PDFS | 974,000 | 8,000 | 21,038,000 | 2,964,000 | $21.60 |
| 09/30/2020 | PDF SOLUTIONS INC | PDFS | 966,000 | -73,000 | 18,074,000 | -2,250,000 | $18.71 |
| 06/30/2020 | PDF SOLUTIONS INC | PDFS | 1,039,000 | -235,615 | 20,324,000 | 5,386,000 | $19.56 |
| 03/31/2020 | PDF SOLUTIONS INC | PDFS | 1,274,615 | 112,800 | 14,938,000 | -4,685,000 | $11.72 |
| 12/31/2019 | PDF SOLUTIONS INC | PDFS | 1,161,815 | -141,385 | 19,623,000 | 2,590,000 | $16.89 |
| 09/30/2019 | PDF SOLUTIONS INC | PDFS | 1,303,200 | -12,900 | 17,033,000 | -235,000 | $13.07 |
| 06/30/2019 | PDF SOLUTIONS INC | PDFS | 1,316,100 | 16,000 | 17,268,000 | 1,212,000 | $13.12 |
| 03/31/2019 | PDF SOLUTIONS INC | PDFS | 1,300,100 | 0 | 16,056,000 | 5,096,000 | $12.35 |
| 12/31/2018 | PDF SOLUTIONS INC | PDFS | 1,300,100 | 84,100 | 10,960,000 | -20,000 | $8.43 |
| 09/30/2018 | PDF SOLUTIONS INC | PDFS | 1,216,000 | 253,500 | 10,980,000 | -551,000 | $9.03 |
| 06/30/2018 | PDF SOLUTIONS INC | PDFS | 962,500 | -70,000 | 11,531,000 | -507,000 | $11.98 |
| 03/31/2018 | PDF SOLUTIONS INC | PDFS | 1,032,500 | 60,000 | 12,038,000 | -3,230,000 | $11.66 |
| 12/31/2017 | PDF SOLUTIONS INC | PDFS | 972,500 | 29,600 | 15,268,000 | 662,000 | $15.70 |
| 09/30/2017 | PDF SOLUTIONS INC | PDFS | 942,900 | 197,900 | 14,606,000 | 2,350,000 | $15.49 |
| 06/30/2017 | PDF SOLUTIONS INC | PDFS | 745,000 | 82,050 | 12,256,000 | -2,740,000 | $16.45 |
| 03/31/2017 | PDF SOLUTIONS INC | PDFS | 662,950 | 0 | 14,996,000 | 46,000 | $22.62 |
| 12/31/2016 | PDF SOLUTIONS INC | PDFS | 662,950 | -4,550 | 14,950,000 | 2,822,000 | $22.55 |
| 09/30/2016 | PDF SOLUTIONS INC | PDFS | 667,500 | 27,500 | 12,128,000 | 3,174,000 | $18.17 |
| 06/30/2016 | PDF SOLUTIONS INC | PDFS | 640,000 | -70,000 | 8,954,000 | -4,132,000 | $13.99 |
| 03/31/2016 | PDF SOLUTIONS INC | PDFS | 630,000 | -80,000 | 8,429,000 | -4,657,000 | $13.38 |
| 12/31/2015 | PDF SOLUTIONS INC | PDFS | 588,500 | -121,500 | 6,379,000 | -6,707,000 | $10.84 |
| 09/30/2015 | PDF SOLUTIONS INC | PDFS | 607,500 | -102,500 | 6,076,000 | -7,010,000 | $10.00 |
| 06/30/2015 | PDF SOLUTIONS INC | PDFS | 544,250 | -165,750 | 8,708,000 | -4,378,000 | $16.00 |
| 03/31/2015 | PDF SOLUTIONS INC | PDFS | 527,500 | -182,500 | 9,453,000 | -3,633,000 | $17.92 |
| 12/31/2014 | PDF SOLUTIONS INC | PDFS | 517,500 | -192,500 | 7,690,000 | -5,396,000 | $14.86 |
| 09/30/2014 | PDF SOLUTIONS INC | PDFS | 472,500 | -237,500 | 5,958,000 | -7,128,000 | $12.61 |
| 06/30/2014 | PDF SOLUTIONS INC | PDFS | 510,500 | -199,500 | 10,833,000 | -2,253,000 | $21.22 |
| 03/31/2014 | PDF SOLUTIONS INC | PDFS | 552,500 | -157,500 | 10,039,000 | -3,047,000 | $18.17 |
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