Are insiders buying ATYR stock?

Yes — 3 distinct insiders have bought ATYR (aTYR PHARMA 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 Oct 9, 2025.

How much ATYR stock have insiders bought?

Insiders have bought a combined $1.0M of ATYR across 5 open-market purchases, based on SEC Form 4 filings.

What is an insider cluster buy in ATYR?

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

Where does this ATYR 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.

ATYR insider buying

1 cluster buy

aTYR PHARMA INC · Healthcare

When two or more insiders at aTYR PHARMA INC buy ATYR 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 ATYR 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

$1.0M

Market cap

$64.1M

Detected clusters

Jun 5 – Jul 24, 2024
Detected Jul 24, 2024
2 insiders
Total bought
$110.2K
Market cap
$64.1M

All notable open-market buys in ATYR

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
Oct 9, 2025	SCHIMMEL PAUL Director	317,999	$0.94	$298.9K	SEC ↗
Oct 8, 2025	SCHIMMEL PAUL Director	682,001	$0.90	$613.8K	SEC ↗
Mar 17, 2025	Gross Jane A Director	3,750	$4.00	$15.0K	SEC ↗
Jul 24, 2024	SCHIMMEL PAULcluster Director	52,300	$1.93	$100.9K	SEC ↗
Jun 5, 2024	DENYES NANCYcluster General Counsel	5,000	$1.86	$9.3K	SEC ↗

More Healthcare stocks with insider cluster buys

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ATYR insider buying — FAQ

Are insiders buying ATYR stock?: Yes — 3 distinct insiders have bought ATYR (aTYR PHARMA 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 Oct 9, 2025.
How much ATYR stock have insiders bought?: Insiders have bought a combined $1.0M of ATYR across 5 open-market purchases, based on SEC Form 4 filings.
What is an insider cluster buy in ATYR?: A cluster buy is two or more distinct aTYR PHARMA INC insiders — officers, directors, or 10% owners — each buying ATYR on the open market within a rolling window. ATYR has 1 detected cluster buy to date.
Where does this ATYR 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 ATYR

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 ATYR 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 ATYR.