# EDGAR Filing Document

**Accession Number:** 0001120914
**File Stem:** 0001437749-26-013941
**Filing Date:** 2026-4
**Character Count:** 2142
**Document Hash:** 13280fa797301b782a0d12be6b71bf9b
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001437749-26-013941.hdr.sgml**: 20260430

**ACCESSION NUMBER**: 0001437749-26-013941

**CONFORMED SUBMISSION TYPE**: DEFA14A

**PUBLIC DOCUMENT COUNT**: 5

**FILED AS OF DATE**: 20260430

**DATE AS OF CHANGE**: 20260429

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** PDF SOLUTIONS INC
- **CENTRAL INDEX KEY:** 0001120914
- **STANDARD INDUSTRIAL CLASSIFICATION:** SERVICES-PREPACKAGED SOFTWARE [7372]
- **ORGANIZATION NAME:** 06 Technology
- **EIN:** 251701361
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** DEFA14A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 000-31311
- **FILM NUMBER:** 26919115

**BUSINESS ADDRESS:**
- **STREET 1:** 2858 DE LA CRUZ BOULEVARD
- **CITY:** SANTA CLARA
- **STATE:** CA
- **ZIP:** 95050
- **BUSINESS PHONE:** 4082807900

**MAIL ADDRESS:**
- **STREET 1:** 2858 DE LA CRUZ BOULEVARD
- **CITY:** SANTA CLARA
- **STATE:** CA
- **ZIP:** 95050

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**UNITED STATES**

**SECURITIES AND EXCHANGE COMMISSION**

**Washington, D.C. 20549**

***SCHEDULE 14A***

Proxy Statement Pursuant to Section 14(A) of the

Securities Exchange Act of 1934

Filed by the Registrant ☑

Filed by a Party other than the Registrant ☐

Check the appropriate box:

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| | |
|:---|:---|
| ☐ | Preliminary Proxy Statement |
| ☐ | **Confidential, for Use of the Commission Only (as permitted by Rule 14a**-**6(e)(2))** |
| ☐ | Definitive Proxy Statement |
| ☑ | Definitive Additional Materials |
| ☐ | Soliciting Material Under Rule § 240.14a-12 |

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***PDF SOLUTIONS, INC.***

(Name of Registrant as Specified In Its Charter)

N/A

(Name of Person(s) Filing proxy statement, if other than the Registrant)

Payment of Filing Fee (Check all boxes that apply):

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| | |
|:---|:---|
| ☑ | No fee required. |
| ☐ | Fee paid previously with preliminary materials |
| ☐ | Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11. |

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