MARTIN J MANNION

CIK 1018067 · last filed 2022-09-09

MARTIN J MANNION is a corporate insider who has filed 8 SEC Form 4 insider transactions across 5 companies since 2007. The most recent filing shows the insider disposed of $446.2M of ATEN on Sep 9, 2022. Across all open-market trades the lifetime net is −$2.88B, making them a net seller over the disclosed history. Current disclosed insider exposure totals $965.8M across reported positions.

"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.

Disclosed Exposure

$965.82M

Companies

5

Total Filings

8

Lifetime Open-Market Net

-$2.88B

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
ATEN		5,388,206	$28.97	$156.10M	$0	1	2022-09-09
Casa Systems Inc (CASA) Delisted	10%+ Owner	38,592,000	$0.04	$1.35M	$6.50M	1	2017-12-19
MTSI		3,515,938	$230.30	$809.72M	-$1.00B	3	2016-02-01
CORPAY, INC. (FLT) Delisted		4,132,156	$303.26	$1.25B	-$1.89B	1	2013-09-12
AMERICAN DENTAL PARTNERS INC (ADPI) Delisted	Director	1,500	—	—	-$124.0K	2	2008-05-05

Recent Filings

8 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
2022-09-09	ATEN	Disp (D)	−35,000,000	-$446.25M	EDGAR
2017-12-19	Casa Systems Inc (CASA) Delisted	Mixed	+77,684,000	$6.50M	EDGAR
2016-02-01	MTSI	Sell (S)	−16,200,000	-$610.74M	EDGAR
2015-06-02	MTSI	Sell (S)	−207,390	-$7.95M	EDGAR
2015-02-11	MTSI	Sell (S)	−13,410,000	-$383.19M	EDGAR
2013-09-12	CORPAY, INC. (FLT) Delisted	Sell (S)	−18,000,000	-$1.89B	EDGAR
2008-05-05	AMERICAN DENTAL PARTNERS INC (ADPI) Delisted	Mixed	−1,500	-$50.4K	EDGAR
2007-02-28	AMERICAN DENTAL PARTNERS INC (ADPI) Delisted	Grant (A)	—	$0	EDGAR

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.