John Kachig Kibarian - 01 Sep 2026 Form 4 Insider Report for PDF SOLUTIONS INC (PDFS)

Reporting relationship: President and CEO, Director
Issuer ticker: PDFS
Reported as of: 01 Sep 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 19 Oct 2026, 09:43:15 UTC
Prior SEC filing: 25 Feb 2025
Source filing: View source filing
Reporting owner signature: /s/ Adnan Raza, Attorney-in-Fact for John Kibarian

Filing notes and source

Key filing fact

John Kachig Kibarian filed Form 4 for PDF SOLUTIONS INC (PDFS) on 19 Oct 2026.

Key facts

This page summarizes John Kachig Kibarian's Form 4 filing for PDF SOLUTIONS INC (PDFS).
1 reported transaction and 1 derivative row are listed below.
Accepted by SEC: 19 Oct 2026, 09:43.

Change

Previous filing in this sequence was filed on 25 Feb 2025.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001164239 Primary reporting owner

KIBARIAN JOHN KACHIG

Relationship: President and CEO, Director
Address: 2858 DE LA CRUZ BLVD., SANTA CLARA
Signature: /s/ Adnan Raza, Attorney-in-Fact for John Kibarian
Signature date: 19 Oct 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

PDFS holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 39,718
Date: 01 Sep 2026
Ownership: Direct

PDFS holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 2,522,756
Date: 01 Sep 2026
Ownership: By Trust

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

PDFS transaction Derivative

Performance Stock Unit

Award

Transaction value
Shares: +71,000
Change %
Price: $0.000000^*
Shares after: 71,000
Date: 01 Sep 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 71,000
Exercise price
Footnotes: F1, F2, F3

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 3 footnotes

Footnote F1

The Performance Stock Units (PSUs) represent a contingent right to receive one share of the Issuer's common stock.

Footnote F2

The number of PSUs reported represents the target award (100%); the number of PSUs ultimately earned may range from 0% to 100% of target.

Footnote F3

The number of PSUs that vest and are earned will be based on attainment of certain stock price goals following the end of a three-year performance period.