Fund

Lightspeed

Menlo Park · founded 2000 · ~$40B AUM

Backs Castelion (hypersonic missiles) and K2 Space. A generalist fund with a growing defense allocation.

Size

$40B under management

Latest fund: $9B (2025)

As of 2025-12-15 · source

$9B+ across six vehicles closed December 2025.

Runs it

No GP profiled

Backs on this map

CastelionK2 Space

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