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Insider · CIK 0001979548

ARCH Venture Partners XII, LLC

ownerdirector

Files at NMRA (Neumora Therapeutics, Inc.), PRME (Prime Medicine, Inc.), MTSR (Metsera, Inc.). First filing Feb 3, 2025, latest Oct 29, 2025.

Track record
Not enough history
Fewer than three past buys with six months of prices.
Median 6-month excess
-
after past buys, n = 0
Hit rate
-
past buys that beat the index over 6 months
Open-market trades
3 / 0
$55M bought, $0 sold

Where the trades landed

Last year at the company this insider has traded most, with each buy and sell on the bar it happened.

NMRA: Neumora Therapeutics, Inc.

NMRAOct 9, 2026 · close 0.48

Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™

Signals

This insider’s open-market buys and sells, scored.

ScoreCompanyValueHoldingsPrice contextFiled
61Notable
NMRAbuy 3
Neumora Therapeutics, Inc.
$5.0M
1,915,700 shares
+46%+337% from low-80% from high
57Moderate
PRMEbuy 4
Prime Medicine, Inc.
$10.0M
3,030,300 shares
+95%-
50Moderate
MTSRbuy 3
Metsera, Inc.
$40M
2,222,222 shares
+13%-

Transactions

Every row this insider has filed, newest first.

DateCompanyTransactionSharesPriceValueHoldings afterFiled
Nov 13, 2025MTSR
Metsera, Inc.
DDisposition to issuer
Common Stockindirect: See Footnote
-18,503,128--0Nov 14, 2025
Nov 13, 2025MTSR
Metsera, Inc.
DDisposition to issuer
Common Stockindirect: See Footnote
-8,313,680--0Nov 14, 2025
Oct 27, 2025NMRA
Neumora Therapeutics, Inc.
POpen-market purchase
Common Stockindirect: By ARCH Venture Fund XII, L.P.
+1,915,700$2.61$5.0M6,046,907Oct 29, 2025
Aug 1, 2025PRME
Prime Medicine, Inc.
POpen-market purchase
Common Stockindirect: By ARCH Venture Fund XII, L.P.
+3,030,300$3.30$10.0M6,230,300Aug 1, 2025
Feb 3, 2025MTSR
Metsera, Inc.
CConversion
Common Stockindirect: See Footnote
+16,006,949--17,070,904Feb 3, 2025
Feb 3, 2025MTSR
Metsera, Inc.
CConversion
Common Stockindirect: See Footnote
+7,523,682--7,523,682Feb 3, 2025
Feb 3, 2025MTSR
Metsera, Inc.
POpen-market purchase
Common Stockindirect: See Footnote
+1,432,224$18.00$26M18,503,128Feb 3, 2025
Feb 3, 2025MTSR
Metsera, Inc.
POpen-market purchase
Common Stockindirect: See Footnote
+789,998$18.00$14M8,313,680Feb 3, 2025
Feb 3, 2025MTSR
Metsera, Inc.
CConversion
Series Seed Preferred Stockderivativeindirect: See Footnote
-19,933,333--0Feb 3, 2025
Feb 3, 2025MTSR
Metsera, Inc.
CConversion
Series A Convertible Preferred Stockderivativeindirect: See Footnote
-15,000,000--0Feb 3, 2025
Feb 3, 2025MTSR
Metsera, Inc.
CConversion
Series B Convertible Preferred Stockderivativeindirect: See Footnote
-2,678,571--0Feb 3, 2025
Feb 3, 2025MTSR
Metsera, Inc.
CConversion
Series A Convertible Preferred Stockderivativeindirect: See Footnote
-15,000,000--0Feb 3, 2025
Feb 3, 2025MTSR
Metsera, Inc.
CConversion
Series B Convertible Preferred Stockderivativeindirect: See Footnote
-2,678,571--0Feb 3, 2025

Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.

ARCH Venture Partners XII, LLC: insider trades and track record | InsiderTell