William A. Schromm

CIK 1363806 · EVP & Chief Operating Officer · last filed 2020-11-17

William A. Schromm is an EVP & Chief Operating Officer who has filed 86 SEC Form 4 insider transactions across 3 companies since 2007. The most recent filing shows the insider sold $2.9M of ON on Nov 17, 2020. Across all open-market trades the lifetime net is −$13.8M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $44.1M 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

$44.08M

Companies

3

Total Filings

86

Lifetime Open-Market Net

-$13.82M

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
ON	EVP & Chief Operating Officer	489,025	$90.13	$44.08M	-$10.33M	35	2020-11-17
COHERENT CORP. (IIVI) Delisted	Director	12,069	$227.08	$2.74M	$0	4	2018-08-30
ON SEMICONDUCTOR CORP (ONNN) Delisted	EVP & Chief Operating Officer	414,605	—	—	-$3.50M	47	2015-03-27

Recent Filings

86 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
2020-11-17	ON	Sell (S)	−104,462	-$2.92M	EDGAR
2020-10-13	ON	Sell (S)	−95,285	-$2.47M	EDGAR
2020-03-10	ON	Tax (F)	−31,049	-$536.5K	EDGAR
2020-03-06	ON	Tax (F)	−8,849	-$161.8K	EDGAR
2020-03-04	ON	Grant (A)	+51,770	$0	EDGAR
2020-01-16	ON	Sell (S)	−9,513	-$242.6K	EDGAR
2020-01-06	ON	Sell (S)	−10,000	-$250.0K	EDGAR
2019-12-23	ON	Sell (S)	−10,000	-$240.0K	EDGAR
2019-12-16	ON	Sell (S)	−10,000	-$230.0K	EDGAR
2019-11-07	ON	Sell (S)	−10,000	-$220.1K	EDGAR

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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.