Arm

Portfolio Co Investors 2026 for Arm: investors, rounds, and co-investor patterns from StartupFundraising.com research, updated for 2026.

Arm accounts for 7 tracked companies with verified cap-table data, 7 of which disclose round sizes totalling $2.6B. The median disclosed raise is $254M, and the largest is Rebellions.ai at $850M, ahead of PragmatIC Printing ($468M) and PragmatIC Semiconductor ($408M).

The names that recur most often on these co-invested cap tables are Arm (7 companies), Avery Dennison (2 companies), Atreides Management (2 companies), Samsung Catalyst Fund (2 companies), Mirae Asset Financial Group (1 company), Korea National Growth Fund (1 company). By latest disclosed round, the market skews Series D (3), Growth (1), Series B (1), Series C (1).

Companies tracked: 7
Disclosed funding total: $2.6B across 7 companies
Median disclosed raise: $254M
Largest raise: Rebellions.ai — $850M
Stage mix: Series D 3 · Growth 1 · Series B 1 · Series C 1
Most recent dated round: 2026-03-30

Best funded Arm companies

Rebellions.ai — $850M (latest: Growth)
PragmatIC Printing — $468M (latest: Series D)
PragmatIC Semiconductor — $408M (latest: Series D)
Positron — $254M (latest: Series B)
proteanTecs — $250M (latest: Series D)
Enfabrica — $230M (latest: Series C)
SiPearl — $141M (latest: Series A)

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