ONEX CORP

CIK 937226 · last filed 2024-10-03

ONEX CORP is a corporate insider who has filed 15 SEC Form 4 insider transactions across 6 companies since 2007. Across all open-market trades the lifetime net is −$6.91B, making them a net seller over the disclosed history. Current disclosed insider exposure totals $1.2M across reported positions. The firm reports its address in Toronto. 92 SEC filings were submitted jointly with GERALD W SCHWARTZ.

"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

$1.21M

Companies

6

Total Filings

15

Lifetime Open-Market Net

-$6.91B

Filer Profile

Reported Address
161 BAY STREET
SUITE 4900
TORONTO M5J 1C4
Phone
(212) 582-2211
State of Incorporation
Ontario, Canada
Related Filers
GERALD W SCHWARTZ — 92 joint filings, latest 2026-07-14
Onex US Principals LP — 49 joint filings, latest 2025-03-31
ONEX PARTNERS LP — 43 joint filings, latest 2017-08-25
OAH Wind LLC — 30 joint filings, latest 2018-04-05
Onex Real Estate Holdings III Inc. — 21 joint filings, latest 2017-08-25
Onex American Holdings GP LLC — 17 joint filings, latest 2025-03-31
Onex American Holdings II LLC — 17 joint filings, latest 2025-03-31
ONEX PARTNERS III PV LP — 16 joint filings, latest 2026-07-14
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 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
POWERSCHOOL HOLDINGS, INC. (PWSC) Delisted Director 71,118,123 $22.81 $1.62B -$433.01M 1 2023-03-07
JELD 10%+ Owner 591,201 $2.05 $1.21M -$4.77B 4 2021-03-05
Emerald Holding, Inc. (EEX) Delisted 10%+ Owner 47,058,332 $5.04 $237.17M -$1.71B 3 2018-04-05
GEN 10%+ Owner $31.23 $0 4 2017-08-25
Genesis Healthcare, Inc. (SKH) Delisted 10%+ Owner $0 1 2012-09-24
Spirit AeroSystems Holdings, Inc. (SPR) Delisted 10%+ Owner $39.50 $0 1 2007-05-30

Recent Filings

15 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
2024-10-03 Disp (D) −355,590,615 $0
2023-03-07 POWERSCHOOL HOLDINGS, INC. (PWSC) Delisted Sell (S) −21,478,695 -$433.01M EDGAR
2021-03-05 JELD Sell (S) −80,000,000 -$2.29B EDGAR
2018-04-05 Emerald Holding, Inc. (EEX) Delisted Sell (S) −7,500,000 -$133.20M EDGAR
2018-03-15 Emerald Holding, Inc. (EEX) Delisted Sell (S) −60,000,000 -$1.07B EDGAR
2017-11-22 JELD Sell (S) −42,635,208 -$1.40B EDGAR
2017-08-25 GEN Sell (S) $0 EDGAR
2017-07-26 GEN Sell (S) $0 EDGAR
2017-06-07 GEN Sell (S) $0 EDGAR
2017-06-02 JELD Sell (S) −27,186,278 -$806.72M 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.