Home

MILLENNIUM GROUP MANAGEMENT LLC

CIK 1446830 · last filed 2026-05-15

MILLENNIUM GROUP MANAGEMENT LLC is a corporate insider who has filed 4 SEC Form 4 insider transactions across 3 companies since 2008. The most recent filing, for SNSE, was dated May 15, 2026. Across all open-market trades the lifetime net is −$10.5M, making them a net seller over the disclosed history. The firm reports its address in New York, NY. 36 SEC filings were submitted jointly with ISRAEL A ENGLANDER.

"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

3

Total Filings

4

Lifetime Open-Market Net

-$10.49M

Filer Profile

Reported Address
C/O MILLENNIUM MANAGEMENT LLC
399 PARK AVENUE
NEW YORK, NY 10022
Phone
(212) 841-4100
State of Incorporation
DE
Formerly Known As
MILLENNIUM INTERNATIONAL MANAGEMENT GP LLC (2008–2014)
Related Filers
ISRAEL A ENGLANDER — 36 joint filings, latest 2026-05-15
MILLENNIUM MANAGEMENT LLC — 36 joint filings, latest 2026-05-15
MILLENNIUM PARTNERS, L.P. — 10 joint filings, latest 2014-01-10
INTEGRATED CORE STRATEGIES (US) LLC — 9 joint filings, latest 2020-06-04
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
Sensei Biotherapeutics, Inc. (SNSE) Delisted 10%+ Owner 141,029 $13.85 $1.95M -$1.59M 1 2026-05-15
LIBERATOR MEDICAL HOLDINGS, INC. (LBMH) Delisted 7,449,079 — — -$7.83M 1 2014-01-10
Global Ship Lease, Inc. (GSL.WS) Delisted 2,075,492 — — -$1.08M 1 2008-10-14

Recent Filings

4 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
2026-05-15 Sensei Biotherapeutics, Inc. (SNSE) Delisted Mixed −51,444 -$1.59M EDGAR
2014-01-10 LIBERATOR MEDICAL HOLDINGS, INC. (LBMH) Delisted Sell (S) −1,674,738 -$7.83M EDGAR
2009-03-23 — Other (J) — $0
2008-10-14 Global Ship Lease, Inc. (GSL.WS) Delisted Sell (S) −278,852 -$1.08M 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.