- Alexander Horn
- Alexander Humphreys
- Alexander Hutton, Inc.
- Alexander Ince
- Alexander Insurance Agency Acquired By HUB International
- Alexander Jekeli
- Alexander Johnson
- Alexander Justiss
- Alexander Kaarls
- Alexander Kaplun
- Alexander Kasdan
- Alexander Katsis
- Alexander Kaulen
- Alexander Keepin
- Alexander Kelloff
- Alexander Kessler
- Alexander Klemm
- Alexander Kloosterman
- Alexander Koch
- Alexander Koeppen
- Alexander Koff
- Alexander Kolb
- Alexander Koles
- Alexander Kollmorgen
- Alexander Kosovský
- Alexander Kowell
- Alexander Krater
- Alexander Kretzer
- Alexander Lalka
- Alexander Lelekov
- Alexander Liegl
- Alexander Lorenz
- Alexander Lourie
- Alexander Lovell
- Alexander Lukanov
- Alexander Lupachev
- Alexander Mack
- Alexander Mackinger
- Alexander Mackinnon
- Alexander Mann Solutions Acquisitions
