ARCH Venture Fund IX, L.P. — SEC Form 4 Insider Trading Activity

Summary

Updated Jul 16, 2026

ARCH Venture Fund IX, L.P. has filed 1 SEC Form 4 filing across 1 company in the last 90 days — selling. Lifetime open-market sales: $40K.

Profile

Role10% Owner

Recent Transactions

DateTickerCompanyCodeSharesPriceValue
2026-07-06BOLDBoundless Bio, Inc.S — Open-market sale16.0K$2.49$40K
2026-07-06BOLDBoundless Bio, Inc.M — Option exercise16.0K$1.03$16K

Companies — Last 90 Days

Frequently Asked Questions

Who is ARCH Venture Fund IX, L.P.?

ARCH Venture Fund IX, L.P. is a corporate insider — currently tracked as 10% Owner of Boundless Bio, Inc. (BOLD). InsiderAlpha tracks every SEC Form 4 filing in real time.

How many SEC Form 4 filings has ARCH Venture Fund IX, L.P. submitted recently?

1 primary Form 4 filings in the last 90 days, covering 1 company.

Has ARCH Venture Fund IX, L.P. been buying or selling stock?

Recorded transactions: 0 open-market purchases () and 1 open-market sales ($40K) across all tracked filings.

Where can I see all of ARCH Venture Fund IX, L.P.'s SEC filings?

All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.

Learn More

Open the live ARCH Venture Fund IX, L.P. profile on InsiderAlpha for real-time alerts, AI-scored trade ideas, and full transaction history.