Quick Takeaways
- PDFS - PDF SOLUTIONS INC has 11 insiders with reported activity on this page.
- Net insider value flow over the last year: +$145,875.
- Recent transaction rows are available for direct filing-level review.
- Info
- Insider Trading
- Financials
- Holders
Insider Transactions Reported by 11 Insiders of PDF SOLUTIONS INC
- Symbol
- PDFS on Nasdaq
- Location
- Santa Clara, CA
What Changed
- Buy value: $145,875; sell value: $0.
- Net share flow: +7,500.
Why This Matters
- This page gives a plain-language issuer insider context before you inspect transaction-level evidence.
- Use the filing links below to verify timestamps, codes, and ownership impacts directly from SEC forms.
Official SEC Source
Insider trading overview
Last 12 monthsNet insider flow leans to buying over the last 12 months. Net value: +$145,875.
Buys
$145,875
Shares: 7,500
Insiders: 1
Sells
$0
Shares: 0
Insiders: 0
Net
+$145,875
Shares: +7,500
Insiders: 1
| Window (months) | Buy shares | Sell shares | Buy $ | Sell $ | Net $ |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 7,500 | 0 | $145,875 | $0 | +$145,875 |
PDF SOLUTIONS INC executives and other stock owners filed with the SEC include:
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| John Kachig Kibarian | PRESIDENT AND CEO, Director | $56,656,300 | Mixed | 24 Feb 2025 | ||
| Kimon Michaels | EVP of Products and Solutions, Director | $43,703,396 | Mixed | 09 Dec 2025 | ||
| Adnan Raza | EVP, Finance and CFO | $2,652,806 | Mixed | 01 Jan 2026 | ||
| Andrzej Strojwas | Chief Technology Officer | $2,544,990 | Mixed | 01 Jan 2026 | ||
| Marco Iansiti | Director | $1,268,405 | Mixed | 01 Jul 2022 | ||
| Nancy Erba | Director | $791,597 | Mixed | 01 Jul 2025 | ||
| Joseph R. Bronson | Director | $736,639 | Mixed | 01 Jul 2025 | ||
| Michael B. Gustafson | Director | $721,932 | +$145,875 | +25% | Mixed | 01 Jul 2025 |
| Ye Jane Li | Director | $460,902 | Mixed | 01 Jul 2025 | ||
| Shuo Zhang | Director | $427,196 | Mixed | 01 Jul 2025 | ||
| Chi-Foon Chan | Director | $413,470 | Mixed | 01 Jul 2025 |
Top shareholders of PDF SOLUTIONS INC (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.
Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
| Holder | Source | Role / Reporting | Ownership % | Shares | Holdings Value | 12M Net Δ | As of | Details |
|---|---|---|---|---|---|---|---|---|
| BlackRock, Inc. |
13F
|
Company |
12%
|
4,885,246
|
$139,376,067 | — | 31 Dec 2025 | |
| VANGUARD GROUP INC |
13F
|
Company |
7.8%
|
3,089,519
|
$88,143,977 | — | 31 Dec 2025 | |
| John Kachig Kibarian |
13D/G
3/4/5
|
KIBARIAN JOHN KACHIG · PRESIDENT AND CEO, Director |
6.5%
|
2,562,474
|
$80,871,679 | +$1,578,000 | 31 Dec 2025 | |
| NEEDHAM INVESTMENT MANAGEMENT LLC |
13D/G
13F
|
NEEDHAM INVESTMENT MANAGEMENT L.L.C. · Company |
4.9%
|
1,965,000
|
$62,015,400 | -$1,690,038 | 31 Dec 2025 | |
| Kimon Michaels |
3/4/5
|
EVP of Products and Solutions, Director |
4%
|
1,570,370
|
$43,703,396 | — | 09 Dec 2025 | |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC |
13F
|
Company |
3.4%
|
1,358,481
|
$38,757,463 | — | 31 Dec 2025 | |
| Ranger Investment Management, L.P. |
13F
|
Company |
3%
|
1,170,014
|
$33,380,499 | — | 31 Dec 2025 | |
| STATE STREET CORP |
13F
|
Company |
2.9%
|
1,151,576
|
$32,854,463 | — | 31 Dec 2025 | |
| Samjo Management, LLC |
13F
|
Company |
2.9%
|
1,151,019
|
$32,838,572 | — | 31 Dec 2025 | |
| SNYDER CAPITAL MANAGEMENT L P |
13F
|
Company |
2.4%
|
955,435
|
$27,258,561 | — | 31 Dec 2025 | |
| EMERALD ADVISERS, LLC |
13F
|
Company |
2.4%
|
943,372
|
$26,914,403 | — | 31 Dec 2025 | |
| JANUS HENDERSON GROUP PLC |
13F
|
Company |
2.3%
|
912,135
|
$26,023,469 | — | 31 Dec 2025 | |
| DIMENSIONAL FUND ADVISORS LP |
13F
|
Company |
2%
|
800,963
|
$22,852,857 | — | 31 Dec 2025 | |
| GEODE CAPITAL MANAGEMENT, LLC |
13F
|
Company |
2%
|
770,152
|
$21,976,906 | — | 31 Dec 2025 | |
| Divisar Capital Management LLC |
13F
|
Company |
1.9%
|
759,815
|
$21,677,522 | — | 31 Dec 2025 | |
| Ophir Asset Management Pty Ltd |
13F
|
Company |
1.8%
|
723,127
|
$20,630,813 | — | 31 Dec 2025 | |
| EMERALD MUTUAL FUND ADVISERS TRUST |
13F
|
Company |
1.5%
|
594,610
|
$16,964,223 | — | 31 Dec 2025 | |
| WASATCH ADVISORS LP |
13F
|
Company |
1.3%
|
522,320
|
$14,901,790 | — | 31 Dec 2025 | |
| ArrowMark Colorado Holdings LLC |
13F
|
Company |
1.3%
|
493,343
|
$14,075,076 | — | 31 Dec 2025 | |
| Silverberg Bernstein Capital Management LLC |
13F
|
Company |
1.2%
|
473,883
|
$13,519,882 | — | 31 Dec 2025 | |
| LOOMIS SAYLES & CO L P |
13F
|
Company |
1.2%
|
465,182
|
$13,271,642 | — | 31 Dec 2025 | |
| Russell Investments Group, Ltd. |
13F
|
Company |
1%
|
407,370
|
$11,622,280 | — | 31 Dec 2025 | |
| MORGAN STANLEY |
13F
|
Company |
1%
|
399,222
|
$11,389,854 | — | 31 Dec 2025 | |
| Connor, Clark & Lunn Investment Management Ltd. |
13F
|
Company |
0.99%
|
388,337
|
$11,079,255 | — | 31 Dec 2025 | |
| Pillsbury Lake Capital LLC |
13F
|
Company |
0.95%
|
376,069
|
$10,729,249 | — | 31 Dec 2025 | |
| NORTHERN TRUST CORP |
13F
|
Company |
0.88%
|
347,934
|
$9,926,558 | — | 31 Dec 2025 | |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC |
13F
|
Company |
0.78%
|
306,825
|
$8,753,717 | — | 31 Dec 2025 | |
| FMR LLC |
13F
|
Company |
0.68%
|
267,075
|
$7,619,651 | — | 31 Dec 2025 | |
| HERALD INVESTMENT MANAGEMENT Ltd |
13F
|
Company |
0.57%
|
225,000
|
$6,419,250 | — | 31 Dec 2025 | |
| Roubaix Capital, LLC |
13F
|
Company |
0.56%
|
220,022
|
$6,277,228 | — | 31 Dec 2025 | |
| Squarepoint Ops LLC |
13F
|
Company |
0.55%
|
217,560
|
$6,206,987 | — | 31 Dec 2025 | |
| Bank of New York Mellon Corp |
13F
|
Company |
0.5%
|
197,821
|
$5,643,828 | — | 31 Dec 2025 | |
| GOLDMAN SACHS GROUP INC |
13F
|
Company |
0.48%
|
189,818
|
$5,415,508 | — | 31 Dec 2025 | |
| PRINCIPAL FINANCIAL GROUP INC |
13F
|
Company |
0.39%
|
153,048
|
$4,366,460 | — | 31 Dec 2025 | |
| RICE HALL JAMES & ASSOCIATES, LLC |
13F
|
Company |
0.37%
|
147,655
|
$4,212,597 | — | 31 Dec 2025 | |
| Invesco Ltd. |
13F
|
Company |
0.35%
|
136,138
|
$3,884,017 | — | 31 Dec 2025 | |
| BROWN CAPITAL MANAGEMENT LLC |
13F
|
Company |
0.32%
|
125,137
|
$3,570,159 | — | 31 Dec 2025 | |
| PRELUDE CAPITAL MANAGEMENT, LLC |
13F
|
Company |
0.3%
|
116,450
|
$3,322,319 | — | 31 Dec 2025 | |
| PUBLIC SECTOR PENSION INVESTMENT BOARD |
13F
|
Company |
0.28%
|
110,729
|
$3,159,098 | — | 31 Dec 2025 | |
| Nuveen, LLC |
13F
|
Company |
0.28%
|
110,629
|
$3,156,245 | — | 31 Dec 2025 | |
| MUTUAL OF AMERICA CAPITAL MANAGEMENT LLC |
13F
|
Company |
0.27%
|
107,649
|
$3,071,226 | — | 31 Dec 2025 | |
| Lisanti Capital Growth, LLC |
13F
|
Company |
0.27%
|
105,540
|
$3,011,056 | — | 31 Dec 2025 | |
| Bridge City Capital, LLC |
13F
|
Company |
0.26%
|
102,324
|
$2,919,304 | — | 31 Dec 2025 | |
| Adnan Raza |
3/4/5
|
EVP, Finance and CFO |
0.24%
|
93,383
|
$2,652,806 | — | 01 Jan 2026 | |
| Andrzej Strojwas |
3/4/5
|
Chief Technology Officer |
0.23%
|
89,204
|
$2,544,990 | — | 01 Jan 2026 | |
| RHUMBLINE ADVISERS |
13F
|
Company |
0.21%
|
82,477
|
$2,353,050 | — | 31 Dec 2025 | |
| Legal & General Group Plc |
13F
|
Company |
0.21%
|
81,420
|
$2,322,913 | — | 31 Dec 2025 | |
| WELLS FARGO & COMPANY/MN |
13F
|
Company |
0.2%
|
80,702
|
$2,302,429 | — | 31 Dec 2025 | |
| BANK OF AMERICA CORP /DE/ |
13F
|
Company |
0.2%
|
79,873
|
$2,278,776 | — | 31 Dec 2025 | |
| TWO SIGMA INVESTMENTS, LP |
13F
|
Company |
0.16%
|
64,986
|
$1,854,051 | — | 31 Dec 2025 |
Recent Insider Transactions by Companies or Individuals for PDF SOLUTIONS INC
Showing up to 300 most recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | Value $ | * Price $ | Shares | Shares Owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Andrzej Strojwas | PDFS | Common Stock | Tax liability | -3% | -2,762 | 89,204 | 01 Jan 2026 | Direct | ||
| Adnan Raza | PDFS | Common Stock | Tax liability | -7.19% | -5,498 | 71,010 | 01 Jan 2026 | Direct | ||
| Kimon Michaels | PDFS | Common Stock | Gift | -0.33% | -5,070 | 1,542,072 | 09 Dec 2025 | By Trust | ||
| Adnan Raza | PDFS | Common Stock | Award | 84.3% | 35,000 | 76,508 | 01 Aug 2025 | Direct | ||
| Andrzej Strojwas | PDFS | Common Stock | Award | 9.53% | 8,000 | 91,966 | 01 Aug 2025 | Direct | ||
| Kimon Michaels | PDFS | Common Stock | Tax liability | -2.74% | -798 | 28,298 | 01 Jul 2025 | By Spouse | ||
| Adnan Raza | PDFS | Common Stock | Tax liability | -7.15% | -4,921 | 63,880 | 01 Jul 2025 | Direct | ||
| Andrzej Strojwas | PDFS | Common Stock | Tax liability | -2.9% | -2,497 | 83,613 | 01 Jul 2025 | Direct | ||
| Joseph R. Bronson | PDFS | Common Stock | Award | 24.1% | 7,429 | 38,267 | 01 Jul 2025 | Direct | ||
| Chi-Foon Chan | PDFS | Common Stock | Award | 52.9% | 7,429 | 21,479 | 01 Jul 2025 | Direct | ||
| Nancy Erba | PDFS | Common Stock | Award | 37.2% | 7,429 | 27,383 | 01 Jul 2025 | Direct | ||
| Michael B. Gustafson | PDFS | Common Stock | Award | 24.7% | 7,429 | 37,503 | 01 Jul 2025 | Direct | ||
| Ye Jane Li | PDFS | Common Stock | Award | 45% | 7,429 | 23,943 | 01 Jul 2025 | Direct | ||
| Shuo Zhang | PDFS | Common Stock | Award | 50.3% | 7,429 | 22,192 | 01 Jul 2025 | Direct | ||
| Michael B. Gustafson | PDFS | Common Stock | Purchase | 33.2% | $145,875 | $19.45 | 7,500 | 30,074 | 13 May 2025 | Direct |
* An asterisk sign (*) next to the price indicates that the price is likely invalid.