Heather L Mason

CIK 1432601 · Interim Executive Officer · last filed 2026-06-18

"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.

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Disclosed Exposure

$14.14M

Companies

3

Total Filings

65

Lifetime Open-Market Net

-$19.61M

Holdings By Company

Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
Symbol Role Shares Price Disclosed Exposure Lifetime OM Net Filings Latest Filed
IMTX Director $9.74 $0 1 2026-06-18
Assertio Holdings, Inc. (ASRT) Delisted Director 0 $23.50 $0 -$567.8K 16 2026-06-16
ABT Executive Vice President 129,064 $109.58 $14.14M -$19.04M 47 2017-07-05

Recent Filings · Page 4 of 7

65 filings
Insider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
Filed Symbol Action Net Shares Net $ Link
2014-03-04 ABT Mixed −11,996 -$475.5K EDGAR
2014-02-25 ABT Grant (A) +17,985 $0 EDGAR
2013-06-11 ABT Sell (S) −12,000 -$444.2K EDGAR
2013-03-01 ABT Tax (F) −11,255 -$385.6K EDGAR
2013-03-01 ABT $0 EDGAR
2013-02-20 ABT Mixed +11,364 -$407.3K EDGAR
2012-08-03 ABT Mixed +50,996 $1.54M EDGAR
2012-08-03 ABT Sell (S) −49,796 -$3.30M EDGAR
2012-08-03 ABT Sell (S) −8,700 -$577.0K EDGAR
2012-03-15 ABT Mixed -$214.9K EDGAR
Showing 3140 of 65
Page 4 of 7
Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.