DOSSIER · 13F Holders · Q2 2026
MRSH 4.35 01/30/47

MARSH & MCLENNAN COS INC

1 institutions still hold MARSH & MCLENNAN COS INC as of Q2 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 571748BC5·1 13F holders·last filed Jun 30, 2026
Market cap
13F value held
$3M
visible holders
Holders
1
filers reporting
Concentration
100.00%
LOUISBOURG INVESTMENTS INC. #1
top holder share
AI Holders Summary · Q2 2026

1 institutions reported MRSH 4.35 01/30/47 in Q2 2026. LOUISBOURG INVESTMENTS INC. leads at 100.0% of the visible book.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
LOUISBOURG INVESTMENTS INC.
CIK 0002053050
$3M26K0.59%Q2 2026