PDF SOLUTIONS INC

Ticker: PDFS CUSIP: 693282105 Class: Common Stock

DIMENSIONAL FUND ADVISORS LP's Holding History (CIK: 0000354204)

Note: Option positions (PUT/CALL) are excluded.

Q4 2025

Shares 800,963 Value ($000) $22,853 Avg Close $27.67 Range $23.55 - $32.31

Q3 2025

Shares 811,293 Value ($000) $20,948 Avg Close $21.84 Range $18.12 - $26.59

Q2 2025

Shares 846,450 Value ($000) $18,097 Avg Close $18.93 Range $15.91 - $21.57

Q1 2025

Shares 854,206 Value ($000) $16,324 Avg Close $24.54 Range $18.50 - $29.50

Q4 2024

Shares 910,314 Value ($000) $24,652 Avg Close $30.15 Range $26.94 - $33.42

Q3 2024

Shares 875,739 Value ($000) $27,744 Avg Close $32.46 Range $27.69 - $39.70

Q2 2024

Shares 917,627 Value ($000) $33,383 Avg Close $33.44 Range $29.21 - $37.16

Q1 2024

Shares 900,774 Value ($000) $30,329 Avg Close $32.80 Range $28.99 - $35.89

Q4 2023

Shares 930,280 Value ($000) $29,900 Avg Close $30.32 Range $26.12 - $34.09

Q3 2023

Shares 932,044 Value ($000) $30,198 Avg Close $38.29 Range $30.80 - $48.02

Q2 2023

Shares 925,257 Value ($000) $41,730 Avg Close $40.80 Range $32.25 - $45.80

Q1 2023

Shares 932,143 Value ($000) $39,522 Avg Close $35.04 Range $27.23 - $42.50

Q4 2022

Shares 930,192 Value ($000) $27 Avg Close $27.01 Range $21.36 - $32.56

Q3 2022

Shares 937,257 Value ($000) $22,993 Avg Close $25.27 Range $20.16 - $30.31

Q2 2022

Shares 952,558 Value ($000) $20,487 Avg Close $23.11 Range $19.34 - $28.11

Q1 2022

Shares 1,028,982 Value ($000) $28,679 Avg Close $27.92 Range $23.73 - $32.80

Q4 2021

Shares 1,014,565 Value ($000) $32,253 Avg Close $27.81 Range $22.46 - $33.78

Q3 2021

Shares 1,015,895 Value ($000) $23,406 Avg Close $20.60 Range $17.29 - $24.20

Q2 2021

Shares 1,031,305 Value ($000) $18,749 Avg Close $17.92 Range $16.70 - $19.76

Q1 2021

Shares 1,077,902 Value ($000) $19,175 Avg Close $19.82 Range $16.44 - $23.50

Q4 2020

Shares 1,196,674 Value ($000) $25,848 Avg Close $20.99 Range $18.51 - $23.42

Q3 2020

Shares 1,363,886 Value ($000) $25,519 Avg Close $20.60 Range $18.18 - $26.42

Q2 2020

Shares 1,433,125 Value ($000) $28,031 Avg Close $16.25 Range $11.05 - $19.64

Q1 2020

Shares 1,526,162 Value ($000) $17,886 Avg Close $14.77 Range $8.61 - $18.41

Q4 2019

Shares 1,704,536 Value ($000) $28,790 Avg Close $15.34 Range $12.53 - $17.42

Q3 2019

Shares 1,783,904 Value ($000) $23,316 Avg Close $12.62 Range $11.16 - $13.84

Q2 2019

Shares 1,914,332 Value ($000) $25,116 Avg Close $12.83 Range $11.77 - $14.00

Q1 2019

Shares 1,997,249 Value ($000) $24,666 Avg Close $11.05 Range $8.24 - $13.53

Q4 2018

Shares 1,948,829 Value ($000) $16,429 Avg Close $8.48 Range $7.56 - $9.45

Q3 2018

Shares 1,867,981 Value ($000) $16,868 Avg Close $10.06 Range $8.10 - $12.66

Q2 2018

Shares 1,603,995 Value ($000) $19,216 Avg Close $11.94 Range $9.62 - $13.84

Q1 2018

Shares 1,556,983 Value ($000) $18,154 Avg Close $13.29 Range $11.07 - $16.76

Q4 2017

Shares 1,440,381 Value ($000) $22,614 Avg Close $16.06 Range $14.12 - $18.48

Q3 2017

Shares 1,335,084 Value ($000) $20,680 Avg Close $16.12 Range $14.11 - $20.10

Q2 2017

Shares 1,283,017 Value ($000) $21,106 Avg Close $18.56 Range $16.07 - $23.93

Q1 2017

Shares 1,220,753 Value ($000) $27,613 Avg Close $22.28 Range $21.03 - $23.40

Q4 2016

Shares 1,186,347 Value ($000) $26,752 Avg Close $20.91 Range $17.45 - $24.44

Q3 2016

Shares 1,122,145 Value ($000) $20,389 Avg Close $16.29 Range $13.48 - $18.18

Q2 2016

Shares 1,018,227 Value ($000) $14,245 Avg Close $13.59 Range $12.09 - $15.25

Q1 2016

Shares 923,176 Value ($000) $12,352 Avg Close $10.95 Range $8.70 - $14.73

Q4 2015

Shares 866,968 Value ($000) $9,398 Avg Close $10.84 Range $9.68 - $11.76

Q3 2015

Shares 869,815 Value ($000) $8,698 Avg Close $12.57 Range $9.91 - $16.45

Q2 2015

Shares 855,562 Value ($000) $13,689 Avg Close $17.19 Range $14.76 - $19.52

Q1 2015

Shares 787,727 Value ($000) $14,116 Avg Close $17.39 Range $13.31 - $18.80

Q4 2014

Shares 773,111 Value ($000) $11,488 Avg Close $13.09 Range $11.62 - $15.24

Q3 2014

Shares 767,860 Value ($000) $9,686 Avg Close $19.84 Range $12.26 - $22.66

Q2 2014

Shares 795,472 Value ($000) $16,880 Avg Close $19.12 Range $16.60 - $21.77

Q1 2014

Shares 851,664 Value ($000) $15,475 Avg Close $22.07 Range $17.21 - $26.73

Q4 2013

Shares 833,666 Value ($000) $21,358 Avg Close $22.99 Range $20.12 - $25.90

Q3 2013

Shares 820,934 Value ($000) $17,445 Avg Close $20.57 Range $18.09 - $22.20

Q2 2013

Shares 852,101 Value ($000) $15,704 Avg Close $17.41 Range $14.95 - $19.03

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	800,963	$22,853	$27.67	$23.55 - $32.31
Q3 2025	811,293	$20,948	$21.84	$18.12 - $26.59
Q2 2025	846,450	$18,097	$18.93	$15.91 - $21.57
Q1 2025	854,206	$16,324	$24.54	$18.50 - $29.50
Q4 2024	910,314	$24,652	$30.15	$26.94 - $33.42
Q3 2024	875,739	$27,744	$32.46	$27.69 - $39.70
Q2 2024	917,627	$33,383	$33.44	$29.21 - $37.16
Q1 2024	900,774	$30,329	$32.80	$28.99 - $35.89
Q4 2023	930,280	$29,900	$30.32	$26.12 - $34.09
Q3 2023	932,044	$30,198	$38.29	$30.80 - $48.02
Q2 2023	925,257	$41,730	$40.80	$32.25 - $45.80
Q1 2023	932,143	$39,522	$35.04	$27.23 - $42.50
Q4 2022	930,192	$27	$27.01	$21.36 - $32.56
Q3 2022	937,257	$22,993	$25.27	$20.16 - $30.31
Q2 2022	952,558	$20,487	$23.11	$19.34 - $28.11
Q1 2022	1,028,982	$28,679	$27.92	$23.73 - $32.80
Q4 2021	1,014,565	$32,253	$27.81	$22.46 - $33.78
Q3 2021	1,015,895	$23,406	$20.60	$17.29 - $24.20
Q2 2021	1,031,305	$18,749	$17.92	$16.70 - $19.76
Q1 2021	1,077,902	$19,175	$19.82	$16.44 - $23.50
Q4 2020	1,196,674	$25,848	$20.99	$18.51 - $23.42
Q3 2020	1,363,886	$25,519	$20.60	$18.18 - $26.42
Q2 2020	1,433,125	$28,031	$16.25	$11.05 - $19.64
Q1 2020	1,526,162	$17,886	$14.77	$8.61 - $18.41
Q4 2019	1,704,536	$28,790	$15.34	$12.53 - $17.42
Q3 2019	1,783,904	$23,316	$12.62	$11.16 - $13.84
Q2 2019	1,914,332	$25,116	$12.83	$11.77 - $14.00
Q1 2019	1,997,249	$24,666	$11.05	$8.24 - $13.53
Q4 2018	1,948,829	$16,429	$8.48	$7.56 - $9.45
Q3 2018	1,867,981	$16,868	$10.06	$8.10 - $12.66
Q2 2018	1,603,995	$19,216	$11.94	$9.62 - $13.84
Q1 2018	1,556,983	$18,154	$13.29	$11.07 - $16.76
Q4 2017	1,440,381	$22,614	$16.06	$14.12 - $18.48
Q3 2017	1,335,084	$20,680	$16.12	$14.11 - $20.10
Q2 2017	1,283,017	$21,106	$18.56	$16.07 - $23.93
Q1 2017	1,220,753	$27,613	$22.28	$21.03 - $23.40
Q4 2016	1,186,347	$26,752	$20.91	$17.45 - $24.44
Q3 2016	1,122,145	$20,389	$16.29	$13.48 - $18.18
Q2 2016	1,018,227	$14,245	$13.59	$12.09 - $15.25
Q1 2016	923,176	$12,352	$10.95	$8.70 - $14.73
Q4 2015	866,968	$9,398	$10.84	$9.68 - $11.76
Q3 2015	869,815	$8,698	$12.57	$9.91 - $16.45
Q2 2015	855,562	$13,689	$17.19	$14.76 - $19.52
Q1 2015	787,727	$14,116	$17.39	$13.31 - $18.80
Q4 2014	773,111	$11,488	$13.09	$11.62 - $15.24
Q3 2014	767,860	$9,686	$19.84	$12.26 - $22.66
Q2 2014	795,472	$16,880	$19.12	$16.60 - $21.77
Q1 2014	851,664	$15,475	$22.07	$17.21 - $26.73
Q4 2013	833,666	$21,358	$22.99	$20.12 - $25.90
Q3 2013	820,934	$17,445	$20.57	$18.09 - $22.20
Q2 2013	852,101	$15,704	$17.41	$14.95 - $19.03