PDF Solutions, Inc. (PDFS)
Nasdaq: PDFS · Services-Prepackaged Software · Santa Clara, CA · filing with the SEC since 2000
Grade5.5
◀ Past 4.1● Present 6.3▶ Future 5.6
Who owns PDF Solutions, Inc.
As filed with the SECHolders of 5% or more
3
Kibarian John Kachig holds 6.5% of COMMON STOCK, as its SCHEDULE 13G/A filed Feb 17, 2026 says.
Directors and officers
10
report now, of 18 people on the record since 2006. Their holdings as a group are not read here.
Institutions as a whole
n/a
The record does not read the share held by managers that file Form 13F, so none is printed and no split of the rest is estimated. What it holds is the 3 named at left.
Holders of 5% or moreshare of the class, as filed
Kibarian John Kachig
SCHEDULE 13G/A · filed Feb 17, 2026 · COMMON STOCK · 6.5% in Feb 12, 2025
Wasatch Advisors LP
SCHEDULE 13G · filed Oct 9, 2026 · Common Stock SH
Needham Investment Management L.L.C.
SCHEDULE 13G · filed May 14, 2026 · Common Stock, $0.00015 par value · 4.9% in Feb 13, 2026
Advantest America, Inc.
SCHEDULE 13G/A · filed May 27, 2026 · Common Stock, par value $0.00015 per share · reported falling below 5%
The Vanguard Group
SCHEDULE 13G/A · filed Mar 27, 2026 · Common Stock · reported falling below 5%
What PDFS reports owning in othersstakes of 5% or more, and other ties
Other ties the annual report names
Secure Wise Business
A company bought · acquisition · Feb 2025 · owns, named in the 10-K filed Feb 24, 2026
15 subsidiaries in 9 countries, from the list filed with the 10-K filed Feb 24, 2026.
Insider tradesForm 4
2sales
0purchases
0sales on a scheduled plan
2people selling
$200,000sold, in dollars
$0bought, in dollars
Open-market trades on Form 4 from Oct 19, 2025 to Oct 19, 2026. A scheduled plan is a selling program set in advance under SEC rule 10b5-1. The trades are listed as filed and do not feed the grade.
By calendar yearSoldBought
2026 runs to Oct 19, 2026. Dollars as filed, summed by the transaction date.
People who traded in the window2 of 18 on the roster
| Person | Role as filed | Sales | Sold | On a plan | Buys | Bought |
|---|---|---|---|---|---|---|
| Strojwas Andrzej | Chief Technology Officer | 1 | $200,000 | 0 | 0 | $0 |
| Zhang Shuo | director | 1 | $100,000 | 0 | 0 | $0 |