Comparable stake leader
John Kachig Kibarian
SEC ownership of PDF SOLUTIONS INC
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001120914.
Disclosed value leader
BlackRock, Inc.
Comparable rows
3/50
Latest evidence
30 Sep 2026
- Public ticker
- PDFS on Nasdaq
- Parsed ownership sources
-
3/4/5, 13D/G, and 13F
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
John Kachig Kibarian
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
3 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
John Kachig Kibarian
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
30 Sep 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001120914
- Issuer location
- Santa Clara, CA
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of PDF SOLUTIONS INC (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
John Kachig Kibarian
Disclosed value leader
BlackRock, Inc.
Comparable rows
3/50
Latest evidence
30 Sep 2026
3/4/5
13D/G
13F
Lead comparable stake: 6.5%
47 rows are not safely comparable across share classes.
13D/G row: John Kachig Kibarian
Showing 1-8 of 50 holder rows.
Quick read
John Kachig Kibarian leads the comparable SEC ownership view at 6.5%.
3 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens John Kachig Kibarian's linked filing trail.
Comparable ownership
Top 3
John Kachig Kibarian
6.5%
WASATCH ADVISORS LP
6.3%
NEEDHAM INVESTMENT MANAGEMENT LLC
5.1%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| John Kachig Kibarian |
3/4/5
13D/G
President and CEO, Director · KIBARIAN JOHN KACHIG
|
6.5%
Reported 13D/G
· 31 Dec 2025
|
$127,534,330
2,633,474 shares
mixed-class rows
|
— | 01 Sep 2026 |
| WASATCH ADVISORS LP |
13D/G
13F
Company
|
6.3%
Reported 13D/G
· 30 Sep 2026
|
$135,107,501
2,646,572 shares
|
$0 | 30 Sep 2026 |
| NEEDHAM INVESTMENT MANAGEMENT LLC |
13F
13D/G
Company · Needham Investment Management L.L.C.
|
5.1%
Reported 13D/G
· 31 Mar 2026
|
$146,181,350
2,065,000 shares
|
— | 30 Jun 2026 |
| BlackRock, Inc. |
13F
Company
|
—
denominator unverified
|
$392,908,214
5,550,335 shares
|
— | 30 Jun 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC |
13F
Company
|
—
denominator unverified
|
$117,812,682
1,664,256 shares
|
— | 30 Jun 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC |
13F
Company
|
—
denominator unverified
|
$103,193,981
1,457,748 shares
|
— | 30 Jun 2026 |
| STATE STREET CORP |
13F
Company
|
—
denominator unverified
|
$98,150,193
1,386,498 shares
|
— | 30 Jun 2026 |
| BARROW HANLEY MEWHINNEY & STRAUSS LLC |
13F
Company
|
—
denominator unverified
|
$93,416,395
1,319,627 shares
|
— | 30 Jun 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$227,984.
Buys
$0
Insiders: 0
Sells
$227,984
Insiders: 2
Net
-$227,984
Shares: -4,895
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 4,895
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 4,895 | $0 | $227,984 | -$227,984 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-11 of 11 reporting-owner rows connected to PDF SOLUTIONS INC. Open a relationship link for the CIK-to-CIK filing trail.
Rows
11
Largest Forms 3/4/5 holder
John Kachig Kibarian
Net 12M change
-$227.98K
Full value: -$227,984 · USD · 12-month changeLatest report
01 Sep 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| John Kachig Kibarian | President and CEO, Director | $127,534,330 | Mixed | 01 Sep 2026 | ||
| Kimon Michaels | EVP of Products and Solutions, Director | $78,157,314 | Mixed | 01 Sep 2026 | ||
| Adnan Raza | EVP, Finance and CFO | $5,572,945 | Mixed | 01 Sep 2026 | ||
| Andrzej Strojwas | Chief Technology Officer | $4,527,328 | -$150,728 | -3.2% | Mixed | 01 Sep 2026 |
| Nancy Erba | Director | $1,433,057 | Mixed | 01 Jul 2026 | ||
| Joseph R. Bronson | Director | $1,339,670 | Mixed | 01 Jul 2026 | ||
| Michael B. Gustafson | Director | $1,314,680 | Mixed | 01 Jul 2026 | ||
| Marco Iansiti | Director | $1,268,405 | Mixed | 01 Jul 2022 | ||
| Shuo Zhang | Director | $1,203,368 | -$77,256 | -6% | Filing P/S | 12 Aug 2026 |
| Ye Jane Li | Director | $871,132 | Mixed | 01 Jul 2026 | ||
| Chi-Foon Chan | Director | $790,535 | Mixed | 01 Jul 2026 |
Recent insider transactions for PDF SOLUTIONS INC
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Adnan Raza | PDFS | Performance Stock Unit | Award | 70,000 | 70,000 | 01 Sep 2026 | Direct | |||
| John Kachig Kibarian | PDFS | Performance Stock Unit | Award | 71,000 | 71,000 | 01 Sep 2026 | Direct | |||
| Andrzej Strojwas | PDFS | Performance Stock Unit | Award | 20,000 | 20,000 | 01 Sep 2026 | Direct | |||
| Kimon Michaels | PDFS | Performance Stock Unit | Award | 71,000 | 71,000 | 01 Sep 2026 | Direct | |||
| Andrzej Strojwas | PDFS | Common Stock | Sale | -3.6% | -$150,728 | $44.41 | -3,394 | 90,965 | 31 Aug 2026 | Direct |
| Shuo Zhang | PDFS | Common Stock | Sale | -6.03% | -$77,256 | $51.47 | -1,501 | 23,380 | 12 Aug 2026 | Direct |
| Andrzej Strojwas | PDFS | Common Stock | Award | 6.03% | 5,360 | 94,203 | 01 Jul 2026 | Direct | ||
| Andrzej Strojwas | PDFS | Common Stock | Tax liability | -1.5% | -1,356 | 88,843 | 01 Jul 2026 | Direct | ||
| Shuo Zhang | PDFS | Common Stock | Award | 12.1% | 2,689 | 24,881 | 01 Jul 2026 | Direct | ||
| Michael B. Gustafson | PDFS | Common Stock | Award | 7.17% | 2,689 | 40,192 | 01 Jul 2026 | Direct | ||
| Chi-Foon Chan | PDFS | Common Stock | Award | 12.5% | 2,689 | 24,168 | 01 Jul 2026 | Direct | ||
| Joseph R. Bronson | PDFS | Common Stock | Award | 7.03% | 2,689 | 40,956 | 01 Jul 2026 | Direct | ||
| Ye Jane Li | PDFS | Common Stock | Award | 11.2% | 2,689 | 26,632 | 01 Jul 2026 | Direct | ||
| Nancy Erba | PDFS | Common Stock | Award | 29.1% | 2,689 | 11,943 | 01 Jul 2026 | Direct | ||
| Adnan Raza | PDFS | Common Stock | Award | 41% | 23,450 | 80,697 | 01 Jul 2026 | Direct | ||
| Adnan Raza | PDFS | Common Stock | Tax liability | -8.46% | -6,010 | 65,000 | 01 Jul 2026 | Direct | ||
| 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 |
* marks a reported price that did not pass the local price check.