Stephen M Zide

CIK 1212455 · last filed 2026-06-11

Stephen M Zide is a corporate insider who has filed 70 SEC Form 4 insider transactions across 4 companies since 2008. The most recent filing, for ST, was dated Jun 11, 2026. Across all open-market trades the lifetime net is −$1.86B, making them a net seller over the disclosed history. Current disclosed insider exposure totals $1.7M across reported positions. 1 Form 144 notice of planned sales is also on file; the latest, for ST on May 18, 2023, lists the filer as a director.

"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

$1.69M

Companies

Total Filings

Lifetime Open-Market Net

-$1.86B

Charts

Trading activity, where the exposure sits, and each trade against the stock price.

TSE price and trades

Daily close with each Form 4 filing on this company marked: green = open-market buy, red = open-market sale, purple = grants, exercises, gifts and other non-market transactions. Marker size scales with the dollar value.

Shares held

Shares owned after each reported transaction on this company (direct holdings as reported).

Open-market buying and selling

by month

Dollar value of open-market purchases (code P, up) and sales (code S, down) across all companies, by filing month. Grants, exercises and gifts are excluded.

Exposure by company

latest

OfficerDirector10% owner* stale (no filing in 3 yrs)

Most recently reported shares × current price. Faded bars (*) have had no filing in 3 years, so the person may no longer hold them. Click a bar to chart that company.

Filer Profile

Reported Address

BAIN CAPITAL PARTNERS
JOHN HANCOCK TOWER, 200 CLARENDON STREET
BOSTON, MA 02116

Profile details as reported on the filer's SEC submissions — for individual insiders the address is often in care of the issuer. Related filers are identified from jointly filed SEC submissions and shared reported addresses. View filings on SEC EDGAR.

Holdings By Company

Latest on-record share count in each company: direct shares plus every indirect holder (trusts, LLCs, partnerships, family members) on the latest Form 4 that lists them. Disclosed exposure = shares × current underlying price.

Symbol	Role	Shares	Price	Disclosed Exposure	Lifetime OM Net	Filings	Latest Filed
ST	Director	43,919	$38.56	$1.69M	-$2.10M	14	2026-06-11
Trinseo PLC (TSE) Delisted	Director	36,281	$0.23	$8.3K	-$1.69B	14	2020-06-19
HD Supply Holdings, Inc. (HDS) Delisted	Director	26,467,995	—	—	$0	6	2014-10-24
Innophos Holdings, Inc. (IPHS) Delisted	Director	44,793	—	—	-$168.40M	10	2012-05-22

Holdings By Holder

Who holds the shares on record: the insider directly, and each trust, LLC, partnership or family member reported as an indirect holder on the latest Form 4 that lists them. Holder names come from the filing's footnotes. Rows under No longer reported appeared on earlier filings but not the latest one, usually because the holder was emptied or folded into another; they are not counted in the total.

Symbol	Holder	Shares	Share of Total	Reported
TSE	Direct	36,281	100.0%	2020-06-19
	Bain Capital Everest Manager Holding SCA See Footnotes	0	0.0%	2016-09-27
	Total	36,281
	No longer reported
	Bain Capital Everest Manager Holding SCA See footnote	37,269,567	—	last 2015-06-29
HDS	Direct	4,145	0.0%	2014-10-24
	BCII 2006 is directed by BCI's Global Private Equity Board See Footnote	26,463,850	100.0%	2014-10-24
	Total	26,467,995
	No longer reported
	BCI 2006 See Footnotes	36,471,875	—	last 2013-08-29
IPHS	Direct	10,745	24.0%	2012-05-22
	Fund VII See Footnotes	34,048	76.0%	2009-05-08
	Total	44,793

Recent Filings

70 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, so not all of them end in a sale. Under each notice: the role the filer ticked on it, and whether a sale followed (a Form 4 sale within 30 days, or a sale listed on a later notice).

Filed	Symbol	Action	Net Shares	Net $	Link
2026-06-11	ST	Mixed	+3,542	-$14.2K	EDGAR
2025-06-12	ST	Mixed	+5,789	-$11.0K	EDGAR
2024-06-13	ST	Mixed	+4,400	-$2.4K	EDGAR
2023-05-30	ST	Mixed	+3,535	-$6.6K	EDGAR
2023-05-19	ST	Mixed	+1,592	-$11.2K	EDGAR
2023-05-18	ST	Notice (144) Director · Planned May 18, 2023 Sold: Form 4 filed May 19, 2023	−10,108	-$415.3K	EDGAR
2022-05-31	ST	Grant (A)	+3,240	$0	EDGAR
2022-05-04	ST	Mixed	—	-$181.0K	EDGAR
2021-06-01	ST	Grant (A)	+2,547	$0	EDGAR
2020-11-03	ST	Mixed	+1,485	-$10.0K	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, and an amended or cancelled notice is not listed. 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. Someone who is no longer an officer or director (or never was) files no Form 4, so for them a sale shows up only on a later notice, which lists the seller's sales from the 3 months before it. "No sale on file" means neither record shows one; a dash in Net $ means the value filed on the notice doesn't fit the stock's price (likely a typo).