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ARCH Venture Partners XII, LLC Insider Profile

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ARCH Venture Partners XII, LLC, Ten Percent Owner at Neumora Therapeutics, Inc., holds 6.29M shares in Seaport Therapeutics, Inc. (Ticker: SPTX), holds 0.00 shares in Metsera, Inc. (Ticker: MTSR), holds 33.85M shares in Neumora Therapeutics, Inc. (Ticker: NMRA).
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ARCH Venture Partners XII, LLC

ARCH Venture Partners XII, LLC
Neumora Therapeutics, Inc. (NMRA)
Ten Percent Owner

Ranked #73,853 out of 107,104 Corporate Insiders

Profitable Transactions

33%
3 out of 9 Profitable Transactions

Average Return

-8.10%
Average return per transaction
Time Frame
1 Year
Compare to
No Benchmark
How are Insiders Ranked?

Insider Holdings

$397M
31.84%
31.47%
20.81%
15.88%
A breakdown of ARCH Venture Partners XII, LLC's holdings
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Insider Roles

Rapport Therapeutics, Inc.
(RAPP)
Ten Percent Owner
Seaport Therapeutics, Inc.
(SPTX)
Ten Percent Owner
Neumora Therapeutics, Inc.
(NMRA)
Ten Percent Owner
Prime Medicine, Inc.
(PRME)
Ten Percent Owner
Roles that ARCH Venture Partners XII, LLC holds in companies
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Most Profitable Insider Trade

Stock:
Neumora Therapeutics, Inc.
(NMRA)
Rating:Informative Buy
Date:Sep 25, 2023 - Sep 25, 2024
Return:+12.20%
The most profitable trade made by ARCH Venture Partners XII, LLC
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ARCH Venture Partners XII, LLC's Trading History

Company Name
Last Transaction Date
Insider Position
Last Transaction
Last Transaction Amount
Holding Value
NMRA
Neumora Therapeutics, Inc.
Oct 29, 2025
Ten Percent Owner
Informative Buy
5.00M
$82.59M
PRME
Prime Medicine, Inc.
Aug 01, 2025
Ten Percent Owner
Informative Buy
10.00M
$63.04M
RAPP
Rapport Therapeutics, Inc.
Jun 10, 2024
Ten Percent Owner
Uninformative Buy
―
$126.37M
MTSR
Metsera, Inc.
Nov 14, 2025
―
Uninformative Sell
―
$0.00
SPTX
Seaport Therapeutics, Inc.
May 04, 2026
Ten Percent Owner
Uninformative Buy
―
$124.89M
List of latest transactions for each holding click on a transaction to see ARCH Venture Partners XII, LLC's performance on stock
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ARCH Venture Partners XII, LLC insider profile FAQ

What is the percentage of profitable transactions made by ARCH Venture Partners XII, LLC?
The percentage of profitable transactions made by ARCH Venture Partners XII, LLC is 33%.
    What is the average return per transaction made by ARCH Venture Partners XII, LLC?
    The average return per transaction made by ARCH Venture Partners XII, LLC is -8.10%.
      What stocks does ARCH Venture Partners XII, LLC hold?
      ARCH Venture Partners XII, LLC holds: NMRA, PRME, RAPP, MTSR, SPTX stocks.
        What was ARCH Venture Partners XII, LLC’s latest transaction?
        ARCH Venture Partners XII, LLC latest transaction was an Uninformative Buy of ―.
          What was ARCH Venture Partners XII, LLC's most profitable transaction?
          ARCH Venture Partners XII, LLC’s most profitable transaction was an Informative Buy of NMRA stock on September 25, 2023. The return on the trade was 12.20%.
            What is ARCH Venture Partners XII, LLC's role in Neumora Therapeutics, Inc.?
            ARCH Venture Partners XII, LLC's role in Neumora Therapeutics, Inc. is Ten Percent Owner.
              How can I follow the stock ratings of top corporate insiders?
              Head over to our Expert Center to see a list of the Top 100 corporate insiders and follow the corporate insiders of your choice. Visit their profiles for more details about their stock transactions and see how they perform on a stock-by-stock basis.