PDF Solutions Inc (PDFS)

PDF Solutions Inc. experienced four insider trading transactions over the past ninety days, all involving sales totaling approximately $455,973. These divestments by executives and directors occurred following the August 2026 results financiers, amid a period where the stock price declined by 35.4%. No recent open-market purchases were recorded during this timeframe.
Ticker: PDFS Exchange: NSM


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Insider trades have triggered activity signals for PDF Solutions Inc. Upgrade to see score, net flow, insiders and the full signal context.

Top insiders
Trades
Abbreviations B: Buy, S: Sell, PP: Planned purchase, PlS: Planned sale, PrS: Proposed sale, O: Option / Other
2.7
Strojwas Andrzej Chief Technology Officer Officer
Transaction date
Planned sale
Price
245.46
Quantity 89,402 +10.0%
Value US$3,403,153
2.7
ANDRZEJ STROJWAS Officer Officer
Transaction date
Proposed sale
Price
175.63
Quantity 56,091
Value US$1,454,575
3.6
Zhang Shuo Non-Executive Director
Transaction date
Sale
Price
216.97
Quantity 68,503 -24.5%
Value US$1,046,414
3.7
SHUO ZHANG Director Non-Executive Director
Transaction date
Proposed sale
Price
51.47
Quantity 1,501
Value US$77,257
3.1
GUSTAFSON MICHAEL B Non-Executive Director
Transaction date
Purchase
Price
19.45
Quantity 7,500 +33.2%
Value US$145,875
1.1
KIBARIAN JOHN KACHIG PRESIDENT AND CEO Executive Director
Transaction date
Purchase
Price
22.11
Quantity 15,644 +0.6%
Value US$345,889
3.1
GUSTAFSON MICHAEL B Non-Executive Director
Transaction date
Purchase
Price
23.06
Quantity 4,000 +21.5%
Value US$92,240
1.1
KIBARIAN JOHN KACHIG PRESIDENT AND CEO Executive Director
Transaction date
Purchase
Price
22.80
Quantity 34,356 +1.4%
Value US$783,317
2.7
Strojwas Andrzej CTO Officer
Transaction date
Sale
Price
30.36
Quantity 6,008 -6.4%
Value US$182,403
2.7
Strojwas Andrzej CTO Officer
Transaction date
Sale
Price
31.17
Quantity 245 -0.3%
Value US$7,637
2.7
Strojwas Andrzej CTO Officer
Transaction date
Sale
Price
30.85
Quantity 5,030 -5.0%
Value US$155,194
2.7
Strojwas Andrzej Officer Officer
Transaction date
Proposed sale
Price
30.85
Quantity 8,687
Value US$267,994
2.9
Erba Nancy Non-Executive Director
Transaction date
Sale
Price
30.81
Quantity 2,000 -12.7%
Value US$61,620
2.9
NANCY ERBA FAMILY LIVING TRUST Director Non-Executive Director
Transaction date
Proposed sale
Price
30.81
Quantity 2,000
Value US$61,620
2.7
Strojwas Andrzej Officer Officer
Transaction date
Proposed sale
Price
33.49
Quantity 6,253
Value US$209,413
3.6
Zhang Shuo Non-Executive Director
Transaction date
Sale
Price
34.66
Quantity 5,500 -34.6%
Value US$190,630
3.7
Zhang Shuo Director Non-Executive Director
Transaction date
Proposed sale
Price
35.43
Quantity 5,500
Value US$194,865
2.2
Raza Adnan Officer Officer
Transaction date
Proposed sale
Price
33.50
Quantity 9,647
Value US$323,174
2.2
Raza Adnan EVP, FINANCE AND CFO Officer
Transaction date
Sale
Price
33.95
Quantity 9,647 -16.7%
Value US$327,516
2.2
Raza Adnan EVP, FINANCE AND CFO Officer
Transaction date
Sale
Price
33.82
Quantity 16,504 -22.2%
Value US$558,165
2.2
Raza Adnan Officer Officer
Transaction date
Proposed sale
Price
33.00
Quantity 6,161
Value US$203,313
2.2
Raza Adnan EVP, FINANCE AND CFO Officer
Transaction date
Sale
Price
34.52
Quantity 1,343 -1.8%
Value US$46,360
2.2
Raza Adnan Officer Officer
Transaction date
Proposed sale
Price
34.50
Quantity 11,686
Value US$403,167
2.7
Strojwas Andrzej Officer Officer
Transaction date
Proposed sale
Price
36.80
Quantity 6,253
Value US$230,110
3.2
Li Ye Jane Non-Executive Director
Transaction date
Sale
Price
33.27
Quantity 9,653 -44.3%
Value US$321,155
3.2
Li Ye Jane Non-Executive Director
Transaction date
Sale
Price
34.00
Quantity 1,531 -6.6%
Value US$52,054
3.2
Li Revocable Trust Director Non-Executive Director
Transaction date
Proposed sale
Price
34.50
Quantity 11,184
Value US$385,848
2.0
BRONSON JOSEPH R Non-Executive Director
Transaction date
Sale
Price
34.63
Quantity 15,000 -36.2%
Value US$519,450
2.0
BRONSON JOSEPH R Director Non-Executive Director
Transaction date
Proposed sale
Price
33.98
Quantity 15,000
Value US$509,700
3.1
GUSTAFSON MICHAEL B Non-Executive Director
Transaction date
Sale
Price
30.86
Quantity 4,883 -25.6%
Value US$150,689
3.1
GUSTAFSON MICHAEL B Non-Executive Director
Transaction date
Sale
Price
31.29
Quantity 867 -4.3%
Value US$27,128
3.1
GUSTAFSON MICHAEL B Officer Officer
Transaction date
Proposed sale
Price
31.27
Quantity 5,750
Value US$179,802
2.9
Erba Nancy Non-Executive Director
Transaction date
Sale
Price
30.57
Quantity 1,800 -10.3%
Value US$55,026
3.6
Zhang Shuo Non-Executive Director
Transaction date
Sale
Price
33.75
Quantity 3,047 -16.1%
Value US$102,836
3.7
Zhang Shuo Director Non-Executive Director
Transaction date
Proposed sale
Price
33.75
Quantity 3,047
Value US$102,836
2.7
Strojwas Andrzej CTO Officer
Transaction date
Sale
Price
38.45
Quantity 2,520 -2.8%
Value US$96,894
2.2
Raza Adnan EVP, FINANCE AND CFO Officer
Transaction date
Sale
Price
37.64
Quantity 15,547 -17.2%
Value US$585,189
3.1
GUSTAFSON MICHAEL B Non-Executive Director
Transaction date
Sale
Price
37.26
Quantity 13,316 -44.5%
Value US$496,154
2.0
BRONSON JOSEPH R Non-Executive Director
Transaction date
Sale
Price
36.47
Quantity 12,500 -24.7%
Value US$455,812
2.7
Strojwas Andrzej CTO Officer
Transaction date
Sale
Price
31.00
Quantity 19,926 -17.6%
Value US$617,628
2.2
Raza Adnan EVP, FINANCE AND CFO Officer
Transaction date
Sale
Price
30.13
Quantity 9,224 -8.6%
Value US$277,895
2.2
Raza Adnan EVP, FINANCE AND CFO Officer
Transaction date
Sale
Price
30.50
Quantity 3,000 -2.7%
Value US$91,500
3.6
Zhang Shuo Non-Executive Director
Transaction date
Sale
Price
29.84
Quantity 2,000 -11.4%
Value US$59,680
3.1
GUSTAFSON MICHAEL B Non-Executive Director
Transaction date
Sale
Price
30.05
Quantity 2,500 -7.7%
Value US$75,125
3.1
GUSTAFSON MICHAEL B Non-Executive Director
Transaction date
Sale
Price
29.79
Quantity 2,500 -7.2%
Value US$74,475
2.2
Raza Adnan EVP, FINANCE AND CFO Officer
Transaction date
Sale
Price
19.90
Quantity 14,387 -14.3%
Value US$286,301
2.2
Raza Adnan EVP, FINANCE AND CFO Officer
Transaction date
Sale
Price
20.62
Quantity 10,000 -9.0%
Value US$206,200
2.2
Raza Adnan EVP, FINANCE AND CFO Officer
Transaction date
Sale
Price
20.27
Quantity 15,000 -11.9%
Value US$304,050
2.2
Raza Adnan EVP, FINANCE AND CFO Officer
Transaction date
Sale
Price
21.02
Quantity 3,990 -3.1%
Value US$83,877
2.2
Raza Adnan EVP, FINANCE AND CFO Officer
Transaction date
Sale
Price
23.47
Quantity 2,166 -1.6%
Value US$50,835
3.6
Zhang Shuo Non-Executive Director
Transaction date
Sale
Price
25.50
Quantity 11,017 -51.5%
Value US$280,934
MICHAELS KIMON EVP OF PRODUCTS AND SOLUTIONS Executive Director
Transaction date
Sale
Price
0.00
Quantity 8,850
Value US$0
3.1
GUSTAFSON MICHAEL B Non-Executive Director
Transaction date
Sale
Price
33.00
Quantity 3,000 -9.8%
Value US$98,992
1.8
Yin Gerald Zheyao Non-Executive Director
Transaction date
Sale
Price
21.18
Quantity 8,678 -44.0%
Value US$183,800
LANZA LUCIO
Transaction date
Sale
Price
15.00
Quantity 60,000 -15.8%
Value US$900,156
LANZA LUCIO
Transaction date
Sale
Price
17.57
Quantity 45,000 -10.6%
Value US$790,592
LANZA LUCIO Non-Executive Director
Transaction date
Sale
Price
16.50
Quantity 30,000 -8.6%
Value US$495,096
LANZA LUCIO Non-Executive Director
Transaction date
Sale
Price
16.61
Quantity 15,000 -4.5%
Value US$249,174
HARTGRING CORNELIS Vice President, CSS Officer
Transaction date
Sale
Price
0.00
Quantity 981
Value US$0
HARTGRING CORNELIS Vice President, CSS Officer
Transaction date
Sale
Price
0.00
Quantity 17,952
Value US$0
Kim KwangH VP of Business Development Officer
Transaction date
Sale
Price
21.91
Quantity 6,000 -100.0%
Value US$131,486
Kim KwangH VP of Business Development Officer
Transaction date
Sale
Price
23.00
Quantity 6,000 -50.0%
Value US$138,015
WALKER GREGORY C CFO, VP Finance Officer
Transaction date
Sale
Price
19.85
Quantity 6,229 -30.8%
Value US$123,646
WALKER GREGORY C CFO, VP Finance Officer
Transaction date
Sale
Price
15.90
Quantity 2,665 -11.5%
Value US$42,376
WALKER GREGORY C CFO, VP Finance Officer
Transaction date
Planned sale
Price
17.00
Quantity 2,382 -9.3%
Value US$40,500
HARTGRING CORNELIS Vice President, CSS Officer
Transaction date
Sale
Price
16.67
Quantity 1,600 -4.2%
Value US$26,672
HARTGRING CORNELIS Vice President, CSS Officer
Transaction date
Planned sale
Price
16.66
Quantity 14,031 -26.9%
Value US$233,803
HEINRICHS R STEPHEN Non-Executive Director
Transaction date
Purchase
Price
14.24
Quantity 6,118 +46.0%
Value US$87,095
HEINRICHS R STEPHEN Non-Executive Director
Transaction date
Sale
Price
16.49
Quantity 29,093 -60.3%
Value US$479,773
HEINRICHS R STEPHEN Non-Executive Director
Transaction date
Sale
Price
16.40
Quantity 5,907 -23.5%
Value US$96,881
Kim KwangH VP of Business Development Officer
Transaction date
Sale
Price
14,900.00
Quantity 18 -100.0%
Value US$267,902
Notification date Transaction date B/S Transaction type Insider and/or position Nb. shares
Price
Value
Number of shares Price Value Details
2026-09-01 2026-08-31 PlS Planned sale

Chief Technology Officer

Officer
89,402 +10.0%
245.46
US$3,403,153
89,402 +10.0% 245.46 US$3,403,153
2026-08-31 2026-08-31 PrS Proposed sale

Officer

Officer
56,091
175.63
US$1,454,575
56,091 175.63 US$1,454,575
2026-08-12 2026-08-12 S Sale Non-Executive Director
68,503 -24.5%
216.97
US$1,046,414
68,503 -24.5% 216.97 US$1,046,414
2026-08-12 2026-08-12 PrS Proposed sale

Director

Non-Executive Director
1,501
51.47
US$77,257
1,501 51.47 US$77,257
2025-05-14 2025-05-13 B Purchase Non-Executive Director
7,500 +33.2%
19.45
US$145,875
7,500 +33.2% 19.45 US$145,875
2025-02-25 2025-02-25 B Purchase

PRESIDENT AND CEO

Executive Director
15,644 +0.6%
22.11
US$345,889
15,644 +0.6% 22.11 US$345,889
2025-02-25 2025-02-24 B Purchase Non-Executive Director
4,000 +21.5%
23.06
US$92,240
4,000 +21.5% 23.06 US$92,240
2025-02-25 2025-02-24 B Purchase

PRESIDENT AND CEO

Executive Director
34,356 +1.4%
22.80
US$783,317
34,356 +1.4% 22.80 US$783,317
2024-12-19 2024-12-17 S Sale

CTO

Officer
6,008 -6.4%
30.36
US$182,403
6,008 -6.4% 30.36 US$182,403
2024-12-19 2024-12-17 S Sale

CTO

Officer
245 -0.3%
31.17
US$7,637
245 -0.3% 31.17 US$7,637
2024-12-17 2024-12-16 S Sale

CTO

Officer
5,030 -5.0%
30.85
US$155,194
5,030 -5.0% 30.85 US$155,194
2024-12-16 2024-12-16 PrS Proposed sale

Officer

Officer
8,687
30.85
US$267,994
8,687 30.85 US$267,994
2024-12-12 2024-12-11 S Sale Non-Executive Director
2,000 -12.7%
30.81
US$61,620
2,000 -12.7% 30.81 US$61,620
2024-12-11 2024-12-11 PrS Proposed sale

Director

Non-Executive Director
2,000
30.81
US$61,620
2,000 30.81 US$61,620
2024-11-13 2024-11-13 PrS Proposed sale

Officer

Officer
6,253
33.49
US$209,413
6,253 33.49 US$209,413
2024-06-04 2024-06-03 S Sale Non-Executive Director
5,500 -34.6%
34.66
US$190,630
5,500 -34.6% 34.66 US$190,630
2024-06-03 2024-06-03 PrS Proposed sale

Director

Non-Executive Director
5,500
35.43
US$194,865
5,500 35.43 US$194,865
2024-05-17 2024-05-17 PrS Proposed sale

Officer

Officer
9,647
33.50
US$323,174
9,647 33.50 US$323,174
2024-05-17 2024-05-17 S Sale

EVP, FINANCE AND CFO

Officer
9,647 -16.7%
33.95
US$327,516
9,647 -16.7% 33.95 US$327,516
2024-05-17 2024-05-16 S Sale

EVP, FINANCE AND CFO

Officer
16,504 -22.2%
33.82
US$558,165
16,504 -22.2% 33.82 US$558,165
2024-05-16 2024-05-16 PrS Proposed sale

Officer

Officer
6,161
33.00
US$203,313
6,161 33.00 US$203,313
2024-05-17 2024-05-15 S Sale

EVP, FINANCE AND CFO

Officer
1,343 -1.8%
34.52
US$46,360
1,343 -1.8% 34.52 US$46,360
2024-05-15 2024-05-15 PrS Proposed sale

Officer

Officer
11,686
34.50
US$403,167
11,686 34.50 US$403,167
2024-05-14 2024-05-14 PrS Proposed sale

Officer

Officer
6,253
36.80
US$230,110
6,253 36.80 US$230,110
2024-02-26 2024-02-26 S Sale Non-Executive Director
9,653 -44.3%
33.27
US$321,155
9,653 -44.3% 33.27 US$321,155
2024-02-26 2024-02-23 S Sale Non-Executive Director
1,531 -6.6%
34.00
US$52,054
1,531 -6.6% 34.00 US$52,054
2024-02-23 2024-02-23 PrS Proposed sale

Director

Non-Executive Director
11,184
34.50
US$385,848
11,184 34.50 US$385,848
2024-02-22 2024-02-21 S Sale Non-Executive Director
15,000 -36.2%
34.63
US$519,450
15,000 -36.2% 34.63 US$519,450
2024-02-21 2024-02-21 PrS Proposed sale

Director

Non-Executive Director
15,000
33.98
US$509,700
15,000 33.98 US$509,700
2023-12-14 2023-12-13 S Sale Non-Executive Director
4,883 -25.6%
30.86
US$150,689
4,883 -25.6% 30.86 US$150,689
2023-12-14 2023-12-12 S Sale Non-Executive Director
867 -4.3%
31.29
US$27,128
867 -4.3% 31.29 US$27,128
2023-12-12 2023-12-12 PrS Proposed sale

Officer

Officer
5,750
31.27
US$179,802
5,750 31.27 US$179,802
2023-11-30 2023-11-29 S Sale Non-Executive Director
1,800 -10.3%
30.57
US$55,026
1,800 -10.3% 30.57 US$55,026
2023-11-29 2023-11-29 PrS Proposed sale

Director

Non-Executive Director
1,800
30.57
US$55,026
1,800 30.57 US$55,026
2023-08-21 2023-08-18 S Sale Non-Executive Director
3,047 -16.1%
33.75
US$102,836
3,047 -16.1% 33.75 US$102,836
2023-08-18 2023-08-18 PrS Proposed sale

Director

Non-Executive Director
3,047
33.75
US$102,836
3,047 33.75 US$102,836
2023-03-08 2023-03-08 S Sale

CTO

Officer
2,520 -2.8%
38.45
US$96,894
2,520 -2.8% 38.45 US$96,894
2023-03-06 2023-03-03 S Sale

EVP, FINANCE AND CFO

Officer
15,547 -17.2%
37.64
US$585,189
15,547 -17.2% 37.64 US$585,189
2023-03-02 2023-02-28 S Sale Non-Executive Director
13,316 -44.5%
37.26
US$496,154
13,316 -44.5% 37.26 US$496,154
2023-02-24 2023-02-22 S Sale Non-Executive Director
12,500 -24.7%
36.47
US$455,812
12,500 -24.7% 36.47 US$455,812
2022-12-02 2022-11-30 S Sale

CTO

Officer
19,926 -17.6%
31.00
US$617,628
19,926 -17.6% 31.00 US$617,628
2022-11-29 2022-11-29 S Sale

EVP, FINANCE AND CFO

Officer
9,224 -8.6%
30.13
US$277,895
9,224 -8.6% 30.13 US$277,895
2022-11-29 2022-11-25 S Sale

EVP, FINANCE AND CFO

Officer
3,000 -2.7%
30.50
US$91,500
3,000 -2.7% 30.50 US$91,500
2022-11-17 2022-11-16 S Sale Non-Executive Director
2,000 -11.4%
29.84
US$59,680
2,000 -11.4% 29.84 US$59,680
2022-11-17 2022-11-16 S Sale Non-Executive Director
2,500 -7.7%
30.05
US$75,125
2,500 -7.7% 30.05 US$75,125
2022-11-17 2022-11-15 S Sale Non-Executive Director
2,500 -7.2%
29.79
US$74,475
2,500 -7.2% 29.79 US$74,475
2022-06-16 2022-06-16 S Sale

EVP, FINANCE AND CFO

Officer
14,387 -14.3%
19.90
US$286,301
14,387 -14.3% 19.90 US$286,301
2022-06-16 2022-06-15 S Sale

EVP, FINANCE AND CFO

Officer
10,000 -9.0%
20.62
US$206,200
10,000 -9.0% 20.62 US$206,200
2022-06-16 2022-06-14 S Sale

EVP, FINANCE AND CFO

Officer
15,000 -11.9%
20.27
US$304,050
15,000 -11.9% 20.27 US$304,050
2022-06-13 2022-06-13 S Sale

EVP, FINANCE AND CFO

Officer
3,990 -3.1%
21.02
US$83,877
3,990 -3.1% 21.02 US$83,877
2022-06-13 2022-06-09 S Sale

EVP, FINANCE AND CFO

Officer
2,166 -1.6%
23.47
US$50,835
2,166 -1.6% 23.47 US$50,835
2022-03-17 2022-03-15 S Sale Non-Executive Director
11,017 -51.5%
25.50
US$280,934
11,017 -51.5% 25.50 US$280,934
2022-02-25 2022-02-23 S Sale

EVP OF PRODUCTS AND SOLUTIONS

Executive Director
8,850
0.00
US$0
8,850 0.00 US$0
2021-11-15 2021-11-12 S Sale Non-Executive Director
3,000 -9.8%
33.00
US$98,992
3,000 -9.8% 33.00 US$98,992
2020-11-23 2020-11-20 S Sale Non-Executive Director
8,678 -44.0%
21.18
US$183,800
8,678 -44.0% 21.18 US$183,800
2019-11-07 2019-11-06 S Sale
2,214 -9.4%
15.75
US$34,870
2,214 -9.4% 15.75 US$34,870
2019-11-07 2019-11-05 S Sale
386 -1.6%
15.97
US$6,164
386 -1.6% 15.97 US$6,164
2019-06-14 2019-06-13 S Sale
1,000 -4.9%
12.95
US$12,949
1,000 -4.9% 12.95 US$12,949
2017-08-21 2017-08-18 S Sale LANZA LUCIO
60,000 -15.8%
15.00
US$900,156
60,000 -15.8% 15.00 US$900,156
2017-06-13 2017-06-09 S Sale LANZA LUCIO
45,000 -10.6%
17.57
US$790,592
45,000 -10.6% 17.57 US$790,592
2017-05-26 2017-05-24 S Sale LANZA LUCIO Non-Executive Director
30,000 -8.6%
16.50
US$495,096
30,000 -8.6% 16.50 US$495,096
2017-05-22 2017-05-18 S Sale LANZA LUCIO Non-Executive Director
15,000 -4.5%
16.61
US$249,174
15,000 -4.5% 16.61 US$249,174
2017-02-21 2017-02-17 S Sale HARTGRING CORNELIS

Vice President, CSS

Officer
981
0.00
US$0
981 0.00 US$0
2017-02-21 2017-02-16 S Sale HARTGRING CORNELIS

Vice President, CSS

Officer
17,952
0.00
US$0
17,952 0.00 US$0
2016-12-07 2016-12-06 S Sale Kim KwangH

VP of Business Development

Officer
6,000 -100.0%
21.91
US$131,486
6,000 -100.0% 21.91 US$131,486
2016-12-05 2016-12-01 S Sale Kim KwangH

VP of Business Development

Officer
6,000 -50.0%
23.00
US$138,015
6,000 -50.0% 23.00 US$138,015
2016-11-09 2016-11-08 S Sale WALKER GREGORY C

CFO, VP Finance

Officer
6,229 -30.8%
19.85
US$123,646
6,229 -30.8% 19.85 US$123,646
2016-09-13 2016-09-12 S Sale WALKER GREGORY C

CFO, VP Finance

Officer
2,665 -11.5%
15.90
US$42,376
2,665 -11.5% 15.90 US$42,376
2016-08-10 2016-08-09 PlS Planned sale WALKER GREGORY C

CFO, VP Finance

Officer
2,382 -9.3%
17.00
US$40,500
2,382 -9.3% 17.00 US$40,500
2016-08-03 2016-08-03 S Sale HARTGRING CORNELIS

Vice President, CSS

Officer
1,600 -4.2%
16.67
US$26,672
1,600 -4.2% 16.67 US$26,672
2016-08-03 2016-08-02 PlS Planned sale HARTGRING CORNELIS

Vice President, CSS

Officer
14,031 -26.9%
16.66
US$233,803
14,031 -26.9% 16.66 US$233,803
2016-06-01 2016-05-27 B Purchase HEINRICHS R STEPHEN Non-Executive Director
6,118 +46.0%
14.24
US$87,095
6,118 +46.0% 14.24 US$87,095
2015-06-15 2015-06-12 S Sale HEINRICHS R STEPHEN Non-Executive Director
29,093 -60.3%
16.49
US$479,773
29,093 -60.3% 16.49 US$479,773
2015-06-15 2015-06-11 S Sale HEINRICHS R STEPHEN Non-Executive Director
5,907 -23.5%
16.40
US$96,881
5,907 -23.5% 16.40 US$96,881
2015-03-06 2015-03-05 S Sale Kim KwangH

VP of Business Development

Officer
18 -100.0%
14,900.00
US$267,902
18 -100.0% 14,900.00 US$267,902