PDF SOLUTIONS INC

Ticker: PDFS CUSIP: 693282105 Class: Common Stock

GROUP ONE TRADING, L.P.'s Holding History (CIK: 0000932540)

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

Q1 2023
Shares 24 Value ($000) $1 Avg Close $35.04 Range $27.23 - $42.50
Q3 2022
Shares 3,200 Value ($000) $79 Avg Close $25.27 Range $20.16 - $30.31
Q1 2022
Shares 1,897 Value ($000) $53 Avg Close $27.92 Range $23.73 - $32.80
Q4 2021
Shares 1,897 Value ($000) $60 Avg Close $27.81 Range $22.46 - $33.78
Q2 2020
Shares 1,603 Value ($000) $31 Avg Close $16.25 Range $11.05 - $19.64
Q4 2019
Shares 772 Value ($000) $13 Avg Close $15.34 Range $12.53 - $17.42
Q3 2019
Shares 6,072 Value ($000) $79 Avg Close $12.62 Range $11.16 - $13.84
Q2 2019
Shares 13,782 Value ($000) $181 Avg Close $12.83 Range $11.77 - $14.00
Q1 2019
Shares 48,062 Value ($000) $594 Avg Close $11.05 Range $8.24 - $13.53
Q4 2018
Shares 100,000 Value ($000) $843 Avg Close $8.48 Range $7.56 - $9.45
Q3 2018
Shares 70,552 Value ($000) $637 Avg Close $10.06 Range $8.10 - $12.66
Q2 2015
Shares 35 Value ($000) $1 Avg Close $17.19 Range $14.76 - $19.52
Q1 2014
Shares 291 Value ($000) $5 Avg Close $22.07 Range $17.21 - $26.73
Q3 2013
Shares 455 Value ($000) $10 Avg Close $20.57 Range $18.09 - $22.20
Q2 2013
Shares 3,155 Value ($000) $58 Avg Close $17.41 Range $14.95 - $19.03