ARCH Venture Fund X, L.P.

SEC Form 4 insider trading activity

ARCH Venture Fund X, L.P. has filed 1 SEC Form 4 filing (12 transaction rows) across 1 company, with disclosures dating back to 2026. 1 of those filings fall inside the rolling window. Most recent filing: Nov 3, 2026.

On the most recent filing, ARCH Venture Fund X, L.P. is listed as 10% Owner at Aspen Neuroscience, Inc. Inside the rolling window, ARCH Venture Fund X, L.P. reported 1 open-market purchase totaling $20.0M in ASPE and no open-market sales.

Companies traded

Other insiders at ASPE

Insider Buying

$20.0M

reported purchases (SEC code P)

Insider Selling

$0

reported sales (SEC code S)

Companies

1

in the rolling window

Source
ASPE
ARCH Venture Fund X, L.P.
Purchase$20.0MNov 3SEC ↗
Showing 1–1 of 1
1 / 1

Frequently asked questions

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

ARCH Venture Fund X, L.P. has filed 1 SEC Form 4 filing (12 transaction rows) across 1 company since 2026.

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

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

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

ARCH Venture Fund X, L.P.'s most recent SEC Form 4 filing on Tracefour is dated Nov 3, 2026.

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

Inside the rolling retention window, ARCH Venture Fund X, L.P. bought $20.0M and sold $0 based on SEC Form 4 filings.

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

The largest disclosed transaction in the current window is a purchase of 1,333,333 ASPE shares on 2026-11-02, worth $20.0M, per SEC Form 4 filings.