Castle Fund

The rounds this investor is named on, who it invests beside, and where it shows up.

Named on one round in the feed.

castle-fund.comSince 2026-09-25

ROUNDS

joined, none as lead

ROUND SIZES · USD

$4.3M

across 1 round

LATEST ROUND

Seed ext. · $4.3M · 2026-09-25

CO-INVESTORS

named beside it

Rounds

[ 1 ]

The rounds this investor is named on, who it invests beside, and where it shows up.

Castle Fund: 1 round · Fireround

Company	Round	Amount	Announced	Role
Overlord Labs, Inc. A fabless semiconductor company building battery intelligence infrastructure for compute-intensive, battery-powered devices	Seed ext. Published on thinner evidence, 1 source	$4.3M	2026-09-25	[ PART ]