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ARCH Venture Partners IX, LLC Insider Profile

11 Followers
ARCH Venture Partners IX, LLC, Ten Percent Owner at Gossamer Bio, holds 3.25M shares in Lyell Immunopharma (Ticker: LYEL), holds 91.73K shares in Vir Biotechnology (Ticker: VIR), holds 2.95M shares in Beam Therapeutics (Ticker: BEAM). Most recently, ARCH Venture Partners IX, LLC Bought ― shares of Lyell Immunopharma on Mar 09, 2026 for an estimated value of $12.50M.
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ARCH Venture Partners IX, LLC

ARCH Venture Partners IX, LLC
Gossamer Bio (GOSS)
Ten Percent Owner

Ranked #11,947 out of 106,324 Corporate Insiders

Profitable Transactions

100%
2 out of 2 Profitable Transactions

Average Return

+297.20%
Average return per transaction
Time Frame
1 Year
Compare to
No Benchmark
How are Insiders Ranked?

Insider Holdings

$154M
50.80%
47.33%
1.31%
0.57%
A breakdown of ARCH Venture Partners IX, LLC's holdings
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Insider Roles

Beam Therapeutics
(BEAM)
Ten Percent Owner
Lyell Immunopharma
(LYEL)
Ten Percent Owner
Gossamer Bio
(GOSS)
Ten Percent Owner
Vir Biotechnology
(VIR)
Ten Percent Owner
Roles that ARCH Venture Partners IX, LLC holds in companies
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Most Profitable Insider Trade

Stock:
Karuna Therapeutics
(KRTX)
Rating:Informative Buy
Date:Jul 02, 2019 - Jul 02, 2020
Return:+405.70%
The most profitable trade made by ARCH Venture Partners IX, LLC
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ARCH Venture Partners IX, LLC's Trading History

Company Name
Last Transaction Date
Insider Position
Last Transaction
Last Transaction Amount
Holding Value
GOSS
Gossamer Bio
Feb 12, 2019
Ten Percent Owner
Uninformative Buy
―
$2.01M
KRTX
Karuna Therapeutics
Apr 15, 2021
―
Uninformative Buy
―
$480.68M
VIR
Vir Biotechnology
Sep 07, 2022
Ten Percent Owner
Uninformative Buy
―
$876.02K
BEAM
Beam Therapeutics
Jul 02, 2021
Ten Percent Owner
Uninformative Buy
―
$78.28M
LYEL
Lyell Immunopharma
Mar 09, 2026
Ten Percent Owner
Informative Buy
12.50M
$72.93M
List of latest transactions for each holding click on a transaction to see ARCH Venture Partners IX, LLC's performance on stock
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ARCH Venture Partners IX, LLC insider profile FAQ

What is the percentage of profitable transactions made by ARCH Venture Partners IX, LLC?
The percentage of profitable transactions made by ARCH Venture Partners IX, LLC is 100%.
    What is the average return per transaction made by ARCH Venture Partners IX, LLC?
    The average return per transaction made by ARCH Venture Partners IX, LLC is 297.20%.
      What stocks does ARCH Venture Partners IX, LLC hold?
      ARCH Venture Partners IX, LLC holds: GOSS, KRTX, VIR, BEAM, LYEL stocks.
        What was ARCH Venture Partners IX, LLC’s latest transaction?
        ARCH Venture Partners IX, LLC latest transaction was an Informative Buy of $12.50M.
          What was ARCH Venture Partners IX, LLC's most profitable transaction?
          ARCH Venture Partners IX, LLC’s most profitable transaction was an Informative Buy of KRTX stock on July 2, 2019. The return on the trade was 405.70%.
            What is ARCH Venture Partners IX, LLC's role in Gossamer Bio?
            ARCH Venture Partners IX, LLC's role in Gossamer Bio 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.