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WASATCH ADVISORS LP
> PDFS
| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 03/31/2023 | PDF SOLUTIONS INC | PDFS | 1,106,316 | -237,055 | 46,907,798,000 | 8,594,857,000 | $42,400.00 |
| 12/31/2022 | PDF SOLUTIONS INC | PDFS | 1,343,371 | -332,344 | 38,312,941,000 | 38,271,836,000 | $28,520.00 |
| 09/30/2022 | PDF SOLUTIONS INC | PDFS | 1,675,715 | 186,653 | 41,105,000 | 9,075,000 | $24.53 |
| 06/30/2022 | PDF SOLUTIONS INC | PDFS | 1,489,062 | 477,311 | 32,030,000 | 3,832,000 | $21.51 |
| 03/31/2022 | PDF SOLUTIONS INC | PDFS | 1,011,751 | 1,011,751 | 28,198,000 | 28,198,000 | $27.87 |
| 09/30/2018 | PDF SOLUTIONS INC | PDFS | 0 | -220,568 | 0 | -2,642 | |
| 06/30/2018 | PDF SOLUTIONS INC | PDFS | 220,568 | 55,891 | 2,642 | 722 | $0.01 |
| 03/31/2018 | PDF SOLUTIONS INC | PDFS | 164,677 | 0 | 1,920 | -665 | $0.01 |
| 12/31/2017 | PDF SOLUTIONS INC | PDFS | 164,677 | -126,924 | 2,585 | -1,932 | $0.02 |
| 09/30/2017 | PDF SOLUTIONS INC | PDFS | 291,601 | -494,148 | 4,517 | -8,409 | $0.02 |
| 06/30/2017 | PDF SOLUTIONS INC | PDFS | 785,749 | -233,842 | 12,926 | -23,050,074 | $0.02 |
| 03/31/2017 | PDF SOLUTIONS INC | PDFS | 1,019,591 | -1,465 | 23,063,000 | 23,039,975 | $22.62 |
| 12/31/2016 | PDF SOLUTIONS INC | PDFS | 1,021,056 | 825,971 | 23,025 | -990,975 | $0.02 |
| 09/30/2008 | PDF SOLUTIONS INC | PDFS | 195,085 | -42,200 | 1,014,000 | -398,000 | $5.20 |
| 06/30/2008 | PDF SOLUTIONS INC | PDFS | 237,285 | 0 | 1,412,000 | 105,000 | $5.95 |
| 03/31/2008 | PDF SOLUTIONS INC | PDFS | 237,285 | 237,285 | 1,307,000 | 1,307,000 | $5.51 |
| 12/31/2007 | PDF SOLUTIONS INC | PDFS | 221,685 | 221,685 | 1,997,000 | 1,997,000 | $9.01 |
| 09/30/2007 | PDF SOLUTIONS INC | PDFS | 92,900 | 92,900 | 918,000 | 918,000 | $9.88 |
| 12/31/2005 | PDF SOLUTIONS INC | PDFS | 0 | -269,623 | 0 | -4,476,000 | |
| 09/30/2005 | PDF SOLUTIONS INC | PDFS | 269,623 | 269,623 | 4,476,000 | 4,476,000 | $16.60 |
| 06/30/2005 | PDF SOLUTIONS INC | PDFS | 490,781 | 490,781 | 6,439,000 | 6,439,000 | $13.12 |
| 03/31/2005 | PDF SOLUTIONS INC | PDFS | 512,407 | 512,407 | 7,174,000 | 7,174,000 | $14.00 |
| 12/31/2004 | PDF SOLUTIONS INC | PDFS | 559,123 | 559,123 | 9,007,000 | 9,007,000 | $16.11 |
| 09/30/2004 | PDF SOLUTIONS INC | PDFS | 608,758 | 608,758 | 7,396,000 | 7,396,000 | $12.15 |
| 06/30/2004 | PDF SOLUTIONS INC | PDFS | 599,176 | 599,176 | 5,075,000 | 5,075,000 | $8.47 |
| 03/31/2004 | PDF SOLUTIONS INC | PDFS | 601,838 | 601,838 | 6,927,000 | 6,927,000 | $11.51 |
| 12/31/2003 | PDF SOLUTIONS INC | PDFS | 623,141 | 623,141 | 9,285,000 | 9,285,000 | $14.90 |
| 09/30/2003 | PDF SOLUTIONS INC | PDFS | 673,215 | 673,215 | 7,574,000 | 7,574,000 | $11.25 |
| 06/30/2003 | PDF SOLUTIONS INC | PDFS | 1,381,123 | 1,381,123 | 16,159,000 | 16,159,000 | $11.70 |
| 03/31/2003 | PDF SOLUTIONS INC | PDFS | 1,687,127 | 1,687,127 | 10,713,000 | 10,713,000 | $6.35 |
| 12/31/2002 | PDF SOLUTIONS INC | PDFS | 1,843,500 | 1,843,500 | 12,775,000 | 12,775,000 | $6.93 |
| 09/30/2002 | PDF SOLUTIONS INC | PDFS | 1,523,311 | 1,523,311 | 8,058,000 | 8,058,000 | $5.29 |
| 06/30/2002 | PDF SOLUTIONS INC | PDFS | 2,077,986 | 2,077,986 | 15,190,000 | 15,190,000 | $7.31 |
| 12/31/2001 | PDF SOLUTIONS INC | PDFS | 847,572 | 847,572 | 17,799,000 | 17,799,000 | $21.00 |
| 09/30/2001 | PDF SOLUTIONS INC | PDFS | 200,750 | 200,750 | 2,058,000 | 2,058,000 | $10.25 |
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