Portfolio Companies 2026 for Michael Seibel: investors, rounds, and co-investor patterns from StartupFundraising.com research, updated for 2026.
Michael Seibel accounts for 4 tracked companies with verified cap-table data, 4 of which disclose round sizes totalling $277M. The median disclosed raise is $75M, and the largest is MarqVision at $90M, ahead of Motion ($75M) and Arena ($62M).
The names that recur most often on these portfolio cap tables are Michael Seibel (4 companies), Y Combinator (3 companies), Peak XV Partners (1 company), Salesforce Ventures (1 company), HSG (1 company), Coral Capital (1 company). By latest disclosed round, the market skews Series B (3), Series C (1).