Updated: May 19, 2026

ARCH Venture Partners XII, L.P.

SPTXSeaport Therapeutics, Inc.SEC CIK: 0001979765
Estimated Net Worth
$47.2 Million428.1%vs Last Year
Last Updated: May 19, 2026 11:55 PM EST

Transaction Summary

Total Transactions19
Buy-Sell Ratio
Buy Transactions12
Sell Transactions0

Transaction Volume

Total Volume$80.93M
Net Volume$80.93M
Buy Volume$80.93M
Sell Volume$0.00

Trade Analysis

AVG Trade Size$4.26M
Largest Trade$40.00M
Most Active MonthSep
Most Active Year2023

Trading Sentiment

OverallBullish
Recent TradeBuying
Last 90 Days+1 Trades
ConvictionMedium

Net Worth & Trading Activity Over Time

Loading...

Monthly Trading Pattern

Loading...

Past Insider Trading and Trends

ARCH Venture Partners XII, L.P. has an estimated net worth of $47.2 Million. This is based on reported shares across multiple companies, which include Neumora Therapeutics, Inc., Rapport Therapeutics, Inc., Metsera, Inc., Seaport Therapeutics, Inc., and Prime Medicine, Inc..



2023 was ARCH Venture Partners XII, L.P.'s most active year for acquiring shares with 26 total transactions. ARCH Venture Partners XII, L.P.'s most active month to acquire stocks was the month of August. 2025 was ARCH Venture Partners XII, L.P.'s most active year for disposing of shares, totalling 7 transactions. ARCH Venture Partners XII, L.P.'s most active month to dispose stocks was the month of January. 2025 saw ARCH Venture Partners XII, L.P. paying a total of $54,999,963.00 for 30,698,853 shares, this is the most they've acquired in one year. In 2024 ARCH Venture Partners XII, L.P. cashed out on 31,924,138 shares for a total of $0.00, their largest year based on trade value.

Holdings & Transactions

SPTXseaport therapeutics, inc.
Updated: May 04, 2026VIEW QUOTE
Form TypeSEC Filing
0.211.10M$18.006.29MMay 04View
View
NMRAneumora therapeutics, inc.
Updated: Oct 29, 2025VIEW QUOTE
Form TypeSEC Filing
0.461.92M$2.61$5.00M33.85MOct 27View
1.031.88M31.93MDec 08View
0.0135.01K$11.77$412.14K4.13MNov 13 - 14View
0.04140.60K$10.98$1.54M4.10MNov 08 - 10View
0.0295.69K$11.49$1.10M3.96MNov 03 - 07View
0.0276.51K$13.68$1.05M3.86MSep 28 - 29View
0.0258.50K$11.97$700.46K3.78MSep 26 - 27View
0.03100.74K$11.19$1.13M3.72MSep 22 - 25View
0.051.50M$17.0029.55MSep 19View
10.62MView
MTSRmetsera, inc.
Updated: Nov 14, 2025VIEW QUOTE
Form TypeSEC Filing
-1.0026.82MNov 13View
-0.3629.54M$18.00$40.00M51.41MFeb 03View
1.06MView
PRMEprime medicine, inc.
Updated: Aug 01, 2025VIEW QUOTE
Form TypeSEC Filing
0.953.03M$3.30$10.00M18.49MAug 01View
3.20M$6.25$20.00M15.46MFeb 15View
rapport therapeutics, inc.
Updated: Jun 10, 2024
Form TypeSEC Filing
-0.8828.20M3.73MJun 10View
View