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SEC Form 4 · STOCK Act

Insider buys that paid off for the people who copied them.

ZeroStack Corp.

+206.0%

Michael Heinrich, Executive Chair, bought $3.5M. Filed Jul 20, 6:31 PM ET.

$1,000 copied at the first price after the filing (Jul 21 open, $1.66) was $3,060 30 trading days later.

Example. Of 339 buys of $100K or more filed Jun 29 to Sep 11, the median lost 5.3% and 67.8% lost money over the same 30 trading days. Not investment advice.

Officers and directors must report their own stock purchases within two business days. We list every one, largest first, with what copying it would have returned.

A free account keeps a watchlist. No password: we email you a link.

4 h delay

Buys Sells Buys and sells Any size $100K+$1M+

Armstrong World Industries Inc

Roy W Templin · Director

$100K+3.0%Mar 2

Armstrong World Industries Inc

Dawn M. Kirchner-King · SVP HR

$48K−100.0%Aug 5

Armstrong World Industries Inc

Victor Grizzle · CEO

$2.3M−6.0%Dec 29

Armstrong World Industries Inc

Mark A Hershey · SVP Americas

$548K−15.0%Feb 2

Armstrong World Industries Inc

Victor Grizzle · CEO

$1.8M−7.0%Dec 28

Armstrong World Industries Inc

Mark A Hershey · SVP Americas

$130K−3.0%Apr 21

Armstrong World Industries Inc

Ellen R. Romano · SVP and HR

$95K−7.0%Mar 22

Armstrong World Industries Inc

Victor Grizzle · CEO

$3.5M−9.0%Dec 17

Armstrong World Industries Inc

Charles M Chiappone · SVP, Ceilings, Wall Solutions

$1.2M−40.0%Sep 15

Armstrong World Industries Inc

Ellen R. Romano · SVP and HR

$324K−18.0%Jun 16

Armstrong World Industries Inc

Mark A Hershey · SVP, Gen Cnsl, Compliance

$514K−10.0%May 4

Armstrong World Industries Inc

Brian L Macneal · CFO

$519K−9.0%May 4

Armstrong World Industries Inc

Ellen R. Romano · SVP and HR

$194K−11.0%Apr 19

Armstrong World Industries Inc

Stephen F Mcnamara · VP, Controller

$1.4M−50.0%Mar 9

Armstrong World Industries Inc

Ellen R. Romano · SVP and HR

$184K−11.0%Mar 9

Armstrong World Industries Inc

Stephen F Mcnamara · VP, Controller

$1.0M−43.0%Feb 26

Armstrong World Industries Inc

Mark A Hershey · SVP, Gen Cnsl, Compliance

$416K−10.0%Jan 15

Armstrong World Industries Inc

Victor Grizzle · CEO

$1.5M−7.0%Dec 18

Armstrong World Industries Inc

Victor Grizzle · CEO

$2.4M−10.0%Dec 16

Armstrong World Industries Inc

Mark A Hershey · SVP, Gen Cnsl, Compliance

$2.7M−43.0%Dec 4

Armstrong World Industries Inc

Charles M Chiappone · SVP, Ceiling Solutions

$473K−19.0%Sep 3

Armstrong World Industries Inc

Charles M Chiappone · SVP, Ceiling Solutions

$1.6M−39.0%Mar 3

Armstrong World Industries Inc

Ellen R. Romano · SVP and HR

$573K−42.0%May 8

Armstrong World Industries Inc

Valueact Holdings, L.P. · Insider

$5.6M−100.0%May 3

Armstrong World Industries Inc

Stephen F Mcnamara · VP, Controller

$679K−43.0%May 2

Armstrong World Industries Inc

Valueact Holdings, L.P. · Insider

$33.4M−88.0%Mar 13

Armstrong World Industries Inc

Valueact Holdings, L.P. · Insider

$127.1M−77.0%Mar 1

Armstrong World Industries Inc

Valueact Holdings, L.P. · Insider

$203.1M−57.0%Nov 13

Armstrong World Industries Inc

Mark A Hershey · SVP, Gen Cnsl, Compliance

$2.5M−65.0%Sep 24

Armstrong World Industries Inc

Valueact Holdings, L.P. · 10% owner

$7.0M−2.0%Sep 5

Armstrong World Industries Inc

Valueact Holdings, L.P. · 10% owner

$2.1M−1.0%Aug 23

Armstrong World Industries Inc

Valueact Holdings, L.P. · 10% owner

$103.8M−22.0%Aug 9

Armstrong World Industries Inc

David S Cookson · SVP, Americas

$1.7M−57.0%Jun 7

Armstrong World Industries Inc

Valueact Holdings, L.P. · 10% owner

$140.1M−26.0%Mar 14

Armstrong World Industries Inc

Ellen R. Romano · SVP and HR

$1.8M−82.0%Nov 22

Armstrong World Industries Inc

Roy W Templin · Director

$99K+124.0%Nov 3

Armstrong World Industries Inc

Stephen F Mcnamara · VP, Controller

$102K−43.0%Aug 16

Filings come from SEC EDGAR within a minute of the SEC accepting them. Without Pro, each one unlocks 4 hours later. Not investment advice.

Questions

Where does the data come from?

Corporate insider trades come straight from SEC Form 4 filings, pulled from EDGAR within a minute of each filing. Congress trades come from STOCK Act disclosures. All of it is public and free to browse here, and Pro sees the newest filings first.

How often is it updated?

Every minute from 6 AM to 10 PM New York time on weekdays, the hours the SEC accepts filings. Pro sees each filing as it lands. Without Pro, a filing unlocks 4 hours after the SEC accepts it.

Is following insider trades legal?

Yes. Insiders are legally required to disclose their trades within a few days. Acting on those public disclosures is completely legal. Trading on private, non-public information is illegal, but that's a different thing.

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