- M&G 112 open
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- Markel 143 open
- Marks & Spencer 5,255 open
- Marqeta 29 open
- MarqVision 15 open
- Marshmallow 14 open
- Marvell Technology 351 open
- Mashgin 3 open
- Mass General Brigham 2,049 open
- Massachusetts Mutual Life Insurance Company 44 open
- Mastercard 749 open
- Material Security 5 open
- Materion 136 open
- Matillion 14 open
- Mattermost 11 open
- Mavenir 13 open
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- Mayo Clinic 1,486 open
- Maze 6 open
- McCormick & Company 213 open
- Media Molecule 2 open
- Medtronic 1,083 open
- Memorial Healthcare System 664 open
- Memorial Sloan Kettering Cancer Center 129 open
- Mercor 91 open
- Mercury 142 open
- Metaview 38 open
- Method Financial 5 open
- Methods 71 open
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- Microchip Technology 335 open
- Micron Technology 2,222 open
- Middesk 5 open
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- Mixpanel 24 open
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- Modern Treasury 5 open
- Moderna 252 open
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- Momentus 10 open
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