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BCS

Changes in Beneficial Ownership · 4

PDF Solutions, Inc.

PDFSNASDAQEQUITYCurrent

Changes in Beneficial Ownership

Filed Jul 2, 2026Accepted Jul 2, 2026, 4:40 PM EDTFiling CIK 1120914Accession 0001437749-26-022543
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Structured filing — 4

rdgdoc.xml

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Filing details

Report period
2026-07-01
Issuer
PDF SOLUTIONS INC
Issuer CIK
0001120914
Trading symbol
PDFS

Reporting owner 1

Name
CHAN CHI-FOON
Reporting owner CIK
0001249834
Relationship
Director
Address
2858 DE LA CRUZ BLVD., SANTA CLARA, CA, 95050

Non-derivative transactions

Non-derivative transactions · 1 reported row
SecurityTransaction dateCodeAmountA / DPrice (USD)Owned afterOwnership
Common Stock2026-07-01A · Form 42,689[F1]A[F1]24,168D
Table key
A · Form 4
Acquisition by grant, award or otherwise under Rule 16b-3(d)
A
Acquired
D
Direct

Footnotes

F1
These shares represent an award of Restricted Stock Units (Total RSU) under the Company's Director Compensation Program. RSU shall vest in four (4) equal installments of twenty-five percent (25%) of the Total RSUs, with vesting occurring on the first day of each calendar quarter following the Grant Effective Date until fully vested, subject to the Recipient's continued service through each applicable vesting date.↩ 1↩ 2

Signature 1

Signed
/s/ Adnan Raza, Attorney-In-Fact for Chi-Foon Chan
Date
2026-07-02

Company context

PDF Solutions (Nasdaq: PDFS) provides comprehensive data solutions designed to empower organizations across the semiconductor and electronics industry ecosystems to improve the yield and quality of their products and operational efficiency for increased profitability. The Company’s products and services are used by Fortune 500 companies across the semiconductor ecosystem to achieve smart manufacturing goals by connecting and controlling equipment, collecting data generated during manufacturing and test operations, and performing advanced analytics and machine learning to enable profitable, high-volume manufacturing.

Current securities

Recent company filings

  1. 10-Q filingNov 5, 2026
  2. Results of Operations and Financial ConditionNov 5, 2026
  3. SCHEDULE 13G - filed by WASATCH ADVISORS LP regarding PDF SOLUTIONS INCOct 9, 2026
  4. 144 filingAug 31, 2026
  5. 144 filingAug 12, 2026

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