AlphaYouAV
Insider selling
Arch Venture Fund Ix, L.P. sold $40K of Boundless Bio, Inc. (BOLD) stock
Arch Venture Fund Ix, L.P., 10% owner of Boundless Bio, Inc. (BOLD), sold 16,000 shares of BOLD stock worth $40K, per an SEC Form 4 filed Jul 6, 2026.
The sale was pre-arranged (a 10b5-1 plan or an option exercise), not a fresh decision.
The trade happened on Jul 1, 2026, 5 days before it was made public.
BOLD has moved +16.1% since the trade date, from $2.48 to $2.88 (Sep 22, 2026 close).
- Traded
- Jul 1, 2026
- Disclosed
- Jul 6, 2026
- Filing delay
- 5 days
- Price since
- +16.1%
- Role
- 10% owner
- Source
- SEC Form 4
More BOLD insider and Congress trades
From a public SEC Form 4, linked above. Not investment advice, and not a recommendation to buy or sell.