Are insiders buying PDFS stock?

Yes — 3 distinct insiders have bought PDFS (PDF SOLUTIONS INC) on the open market, including 1 cluster buy where two or more insiders bought within a rolling window. The most recent qualifying activity was May 14, 2025.

How much PDFS stock have insiders bought?

Insiders have bought a combined $1.4M of PDFS across 4 open-market purchases, based on SEC Form 4 filings.

What is an insider cluster buy in PDFS?

A cluster buy is two or more distinct PDF SOLUTIONS INC insiders — officers, directors, or 10% owners — each buying PDFS on the open market within a rolling window. PDFS has 1 detected cluster buy to date.

Where does this PDFS insider trading data come from?

Every figure is parsed directly from SEC Form 4 filings on EDGAR, and each purchase on this page links back to its original filing document.

PDFS insider buying

1 cluster buy

PDF SOLUTIONS INC · Technology

When two or more insiders at PDF SOLUTIONS INC buy PDFS on the open market around the same time, that clustered conviction is one of the highest-signal patterns in SEC filing data. Below is every cluster we've detected in PDFS plus the full record of qualifying open-market buys, each parsed directly from Form 4 filings and linked back to the source on SEC EDGAR.

Clusters

Distinct insiders

Total bought

$1.4M

Market cap

$2.4B

Detected clusters

Feb 24 – May 13, 2025
Detected May 13, 2025
High conviction2 insiders
Total bought
$1.3M
Market cap
$2.4B

All notable open-market buys in PDFS

Every open-market Form 4 purchase, newest first. Click an insider to see their full buying record across companies.

Date	Insider	Shares	Price	Value	Filing
May 13, 2025	GUSTAFSON MICHAEL Bcluster Director	7,500	$19.45	$145.9K	SEC ↗
Feb 25, 2025	KIBARIAN JOHN KACHIGcluster Director, PRESIDENT AND CEO	15,644	$22.11	$345.9K	SEC ↗
Feb 24, 2025	KIBARIAN JOHN KACHIGcluster Director, PRESIDENT AND CEO	34,356	$22.80	$783.3K	SEC ↗
Feb 24, 2025	GUSTAFSON MICHAEL B Director	4,000	$23.06	$92.2K	SEC ↗

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PDFS insider buying — FAQ

Are insiders buying PDFS stock?: Yes — 3 distinct insiders have bought PDFS (PDF SOLUTIONS INC) on the open market, including 1 cluster buy where two or more insiders bought within a rolling window. The most recent qualifying activity was May 14, 2025.
How much PDFS stock have insiders bought?: Insiders have bought a combined $1.4M of PDFS across 4 open-market purchases, based on SEC Form 4 filings.
What is an insider cluster buy in PDFS?: A cluster buy is two or more distinct PDF SOLUTIONS INC insiders — officers, directors, or 10% owners — each buying PDFS on the open market within a rolling window. PDFS has 1 detected cluster buy to date.
Where does this PDFS insider trading data come from?: Every figure is parsed directly from SEC Form 4 filings on EDGAR, and each purchase on this page links back to its original filing document.

How we track insider buying in PDFS

We continuously poll SEC EDGAR for new Form 4 filings and parse every open-market purchase (transaction code P). A cluster is recorded when two or more distinct insiders — officers, directors, or 10% owners — each buy PDFS within a rolling window. We track clusters at every company size, from micro-caps to mega-caps. Every figure on this page traces back to an official filing; open any row to jump straight to the source document. What counts as a cluster buy?

This page is informational and reflects public filing data. It is not investment advice or a recommendation regarding PDFS.