Home

CORPORATE OFFICE PROPERTIES TRUST

CIK 860546 · last filed 2011-06-09

CORPORATE OFFICE PROPERTIES TRUST is a corporate insider who has filed 12 SEC Form 4 insider transactions across 1 company since 2011. The most recent filing shows the insider sold $250.4K of KEYW on Jun 9, 2011. Across all open-market trades the lifetime net is −$5.9M, making them a net seller over the disclosed history. 134 SEC filings were submitted jointly with ROBERT L DENTON.

"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.

Loading insider history…
Disclosed Exposure

$0

Companies

1

Total Filings

12

Lifetime Open-Market Net

-$5.89M

Filer Profile

Reported Address
6711 COLUMBIA GATEWAY DRIVE
SUITE 300
COLUMBIA, MD 21046
Phone
(443) 285-5400
State of Incorporation
MD
Formerly Known As
CORPORATE OFFICE PROPERTIES TRUST (1998–2023)
CORPORATE OFFICE PROPERTIES TRUST INC (1998–1998)
ROYALE INVESTMENTS INC (1996–1997)
Related Filers
ROBERT L DENTON — 134 joint filings, latest 2026-08-07
STEPHEN E BUDORICK — 80 joint filings, latest 2026-03-03
CLAY W HAMLIN III — 80 joint filings, latest 2014-04-07
ROGER A WAESCHE JR — 52 joint filings, latest 2016-03-07
RANDALL M GRIFFIN — 46 joint filings, latest 2012-03-05
KAREN M SINGER — 44 joint filings, latest 2016-03-07
STEVEN D KESLER — 43 joint filings, latest 2023-12-14
Anthony Mifsud — 32 joint filings, latest 2026-03-03
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
KEYW HOLDING CORP (KEYW) Delisted 10%+ Owner 2,568,184 — — -$5.89M 12 2011-06-09

Recent Filings

12 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
2011-06-09 KEYW HOLDING CORP (KEYW) Delisted Sell (S) −21,000 -$250.4K EDGAR
2011-06-06 KEYW HOLDING CORP (KEYW) Delisted Sell (S) −76,400 -$900.9K EDGAR
2011-06-02 KEYW HOLDING CORP (KEYW) Delisted Sell (S) −37,600 -$422.9K EDGAR
2011-05-31 KEYW HOLDING CORP (KEYW) Delisted Sell (S) −25,000 -$276.5K EDGAR
2011-05-18 KEYW HOLDING CORP (KEYW) Delisted Sell (S) −40,000 -$447.3K EDGAR
2011-05-17 KEYW HOLDING CORP (KEYW) Delisted Sell (S) −11,000 -$122.1K EDGAR
2011-05-16 KEYW HOLDING CORP (KEYW) Delisted Sell (S) −29,000 -$321.7K EDGAR
2011-05-13 KEYW HOLDING CORP (KEYW) Delisted Sell (S) −9,000 -$100.9K EDGAR
2011-05-10 KEYW HOLDING CORP (KEYW) Delisted Sell (S) −40,000 -$447.7K EDGAR
2011-05-04 KEYW HOLDING CORP (KEYW) Delisted Sell (S) −60,000 -$680.2K EDGAR
Showing 1–10 of 12
Page 1 of 2
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.