Are insiders buying CERS stock?

Yes — 5 distinct insiders have bought CERS (CERUS CORP) on the open market, including 1 cluster buy where two or more insiders bought within a rolling window. The most recent qualifying activity was Aug 25, 2025.

How much CERS stock have insiders bought?

Insiders have bought a combined $85.2K of CERS across 6 open-market purchases, based on SEC Form 4 filings.

What is an insider cluster buy in CERS?

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

Where does this CERS 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.

CERS insider buying

1 cluster buy

CERUS CORP · Healthcare

When two or more insiders at CERUS CORP buy CERS 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 CERS 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

$85.2K

Market cap

$657.2M

Detected clusters

May 9 – May 13, 2024
Detected May 13, 2024
4 insiders
Total bought
$51.1K
Market cap
$657.2M

All notable open-market buys in CERS

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
Aug 25, 2025	Gregory Dean A. Director	25,000	$1.25	$31.3K	SEC ↗
Dec 13, 2024	Gregory Dean A. Director	1,725	$1.70	$2.9K	SEC ↗
May 13, 2024	Shan Huacluster Director	2,500	$1.99	$5.0K	SEC ↗
May 10, 2024	NACHTSHEIM JAMI Kcluster Director	2,000	$1.79	$3.6K	SEC ↗
May 9, 2024	Witney Frankcluster Director	20,000	$1.89	$37.8K	SEC ↗
May 9, 2024	Swisher Daniel N JRcluster Director	2,500	$1.88	$4.7K	SEC ↗

More Healthcare stocks with insider cluster buys

All insider buying in Healthcare →

CERS insider buying — FAQ

Are insiders buying CERS stock?: Yes — 5 distinct insiders have bought CERS (CERUS CORP) on the open market, including 1 cluster buy where two or more insiders bought within a rolling window. The most recent qualifying activity was Aug 25, 2025.
How much CERS stock have insiders bought?: Insiders have bought a combined $85.2K of CERS across 6 open-market purchases, based on SEC Form 4 filings.
What is an insider cluster buy in CERS?: A cluster buy is two or more distinct CERUS CORP insiders — officers, directors, or 10% owners — each buying CERS on the open market within a rolling window. CERS has 1 detected cluster buy to date.
Where does this CERS 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 CERS

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 CERS 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 CERS.