ARCH Venture Fund IX, L.P.

SEC Form 4 insider trading activity

ARCH Venture Fund IX, L.P. has filed 1 SEC Form 4 filing (2 transaction rows) across 1 company, with disclosures dating back to 2026. 1 of those filings fall inside the rolling window. Most recent filing: Jul 6, 2026.

On the most recent filing, ARCH Venture Fund IX, L.P. is listed as 10% Owner at Boundless Bio, Inc. Inside the rolling window, ARCH Venture Fund IX, L.P. reported no open-market purchases and 1 open-market sale totaling $40K in BOLD.

Companies traded

Other insiders at BOLD

Insider Buying

$0

reported purchases (SEC code P)

Insider Selling

$40K

reported sales (SEC code S)

Companies

1

in the rolling window

Source
BOLD
ARCH Venture Fund IX, L.P.
Sale$40KJul 6SEC ↗
Showing 1–1 of 1
1 / 1

Frequently asked questions

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

ARCH Venture Fund IX, L.P. has filed 1 SEC Form 4 filing (2 transaction rows) across 1 company since 2026.

Which companies does ARCH Venture Fund IX, L.P. trade?

ARCH Venture Fund IX, L.P. has filed SEC Form 4 disclosures for 1 company, including BOLD.

When was ARCH Venture Fund IX, L.P.'s most recent SEC Form 4 filing?

ARCH Venture Fund IX, L.P.'s most recent SEC Form 4 filing on Tracefour is dated Jul 6, 2026.

What is ARCH Venture Fund IX, L.P.'s total buy and sell value in the current window?

Inside the rolling retention window, ARCH Venture Fund IX, L.P. bought $0 and sold $40K based on SEC Form 4 filings.

What was ARCH Venture Fund IX, L.P.'s largest disclosed transaction?

The largest disclosed transaction in the current window is a sale of 16,000 BOLD shares on 2026-07-01, worth $40K, per SEC Form 4 filings.