PDF SOLUTIONS INC

Ticker: PDFS CUSIP: 693282105 Class: Common Stock

WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC's Holding History (CIK: 0001644956)

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

Q4 2025

Shares 1,358,481 Value ($000) $38,757 Avg Close $27.67 Range $23.55 - $32.31

Q3 2025

Shares 1,349,441 Value ($000) $34,843 Avg Close $21.84 Range $18.12 - $26.59

Q2 2025

Shares 1,187,083 Value ($000) $25,380 Avg Close $18.93 Range $15.91 - $21.57

Q1 2025

Shares 1,125,959 Value ($000) $21,517 Avg Close $24.54 Range $18.50 - $29.50

Q4 2024

Shares 1,063,583 Value ($000) $28,802 Avg Close $30.15 Range $26.94 - $33.42

Q3 2024

Shares 902,277 Value ($000) $28,584 Avg Close $32.46 Range $27.69 - $39.70

Q2 2024

Shares 743,635 Value ($000) $27,053 Avg Close $33.44 Range $29.21 - $37.16

Q1 2024

Shares 652,846 Value ($000) $21,981 Avg Close $32.80 Range $28.99 - $35.89

Q4 2023

Shares 647,937 Value ($000) $20,825 Avg Close $30.32 Range $26.12 - $34.09

Q3 2023

Shares 555,904 Value ($000) $18,011 Avg Close $38.29 Range $30.80 - $48.02

Q2 2023

Shares 697,225 Value ($000) $31,445 Avg Close $40.80 Range $32.25 - $45.80

Q1 2023

Shares 784,917 Value ($000) $33,280 Avg Close $35.04 Range $27.23 - $42.50

Q4 2022

Shares 839,840 Value ($000) $23,952 Avg Close $27.01 Range $21.36 - $32.56

Q3 2022

Shares 835,261 Value ($000) $20,489 Avg Close $25.27 Range $20.16 - $30.31

Q2 2022

Shares 793,363 Value ($000) $17,065 Avg Close $23.11 Range $19.34 - $28.11

Q1 2022

Shares 785,302 Value ($000) $21,886 Avg Close $27.92 Range $23.73 - $32.80

Q4 2021

Shares 1,098,554 Value ($000) $34,923 Avg Close $27.81 Range $22.46 - $33.78

Q3 2021

Shares 1,139,540 Value ($000) $26,255 Avg Close $20.60 Range $17.29 - $24.20

Q2 2021

Shares 786,535 Value ($000) $14,299 Avg Close $17.92 Range $16.70 - $19.76

Q1 2021

Shares 804,248 Value ($000) $14,300 Avg Close $19.82 Range $16.44 - $23.50

Q4 2020

Shares 744,673 Value ($000) $16,085 Avg Close $20.99 Range $18.51 - $23.42

Q3 2020

Shares 633,339 Value ($000) $11,850 Avg Close $20.60 Range $18.18 - $26.42

Q2 2020

Shares 479,112 Value ($000) $9,371 Avg Close $16.25 Range $11.05 - $19.64

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	1,358,481	$38,757	$27.67	$23.55 - $32.31
Q3 2025	1,349,441	$34,843	$21.84	$18.12 - $26.59
Q2 2025	1,187,083	$25,380	$18.93	$15.91 - $21.57
Q1 2025	1,125,959	$21,517	$24.54	$18.50 - $29.50
Q4 2024	1,063,583	$28,802	$30.15	$26.94 - $33.42
Q3 2024	902,277	$28,584	$32.46	$27.69 - $39.70
Q2 2024	743,635	$27,053	$33.44	$29.21 - $37.16
Q1 2024	652,846	$21,981	$32.80	$28.99 - $35.89
Q4 2023	647,937	$20,825	$30.32	$26.12 - $34.09
Q3 2023	555,904	$18,011	$38.29	$30.80 - $48.02
Q2 2023	697,225	$31,445	$40.80	$32.25 - $45.80
Q1 2023	784,917	$33,280	$35.04	$27.23 - $42.50
Q4 2022	839,840	$23,952	$27.01	$21.36 - $32.56
Q3 2022	835,261	$20,489	$25.27	$20.16 - $30.31
Q2 2022	793,363	$17,065	$23.11	$19.34 - $28.11
Q1 2022	785,302	$21,886	$27.92	$23.73 - $32.80
Q4 2021	1,098,554	$34,923	$27.81	$22.46 - $33.78
Q3 2021	1,139,540	$26,255	$20.60	$17.29 - $24.20
Q2 2021	786,535	$14,299	$17.92	$16.70 - $19.76
Q1 2021	804,248	$14,300	$19.82	$16.44 - $23.50
Q4 2020	744,673	$16,085	$20.99	$18.51 - $23.42
Q3 2020	633,339	$11,850	$20.60	$18.18 - $26.42
Q2 2020	479,112	$9,371	$16.25	$11.05 - $19.64