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ARCH Venture Partners XII, LLC

10% owner at Seaport Therapeutics · 10% owner at Neumora Therapeutics · 10% owner at Prime Medicine. Filing since 22 Sep 2023. CIK 0001979548

SPTX Seaport Therapeutics, Inc. 10% owner · 1 trade NMRA Neumora Therapeutics, Inc. 10% owner · 15 trades PRME Prime Medicine, Inc. 10% owner · 2 trades
Company
Date
Role
Action
Shares
Amount
Of holding
SPTX Seaport Therapeutics, Inc.
4 May 2026
10% owner
Bought
1,100,000
$19.80M
21.2%
NMRA Neumora Therapeutics, Inc.
27 Oct 2025
10% owner
Bought
1,915,700
$5.00M
46.4%
PRME Prime Medicine, Inc.
1 Aug 2025
10% owner
Bought
3,030,300
$10.00M
94.7%
PRME Prime Medicine, Inc.
15 Feb 2024
10% owner
Bought
3,200,000
$20.00M
opened
NMRA Neumora Therapeutics, Inc.
14 Nov 2023
10% owner
Bought
3,357
$40.22K
0.1%
NMRA Neumora Therapeutics, Inc.
13 Nov 2023
10% owner
Bought
31,653
$371.92K
0.8%
NMRA Neumora Therapeutics, Inc.
10 Nov 2023
10% owner
Bought
17,275
$198.48K
0.4%
NMRA Neumora Therapeutics, Inc.
9 Nov 2023
10% owner
Bought
31,079
$327.26K
0.8%
NMRA Neumora Therapeutics, Inc.
8 Nov 2023
10% owner
Bought
92,251
$1.02M
2.3%
NMRA Neumora Therapeutics, Inc.
7 Nov 2023
10% owner
Bought
30,192
$347.21K
0.8%
NMRA Neumora Therapeutics, Inc.
6 Nov 2023
10% owner
Bought
43,082
$497.60K
1.1%
NMRA Neumora Therapeutics, Inc.
3 Nov 2023
10% owner
Bought
22,420
$255.14K
0.6%
NMRA Neumora Therapeutics, Inc.
29 Sep 2023
10% owner
Bought
34,560
$483.15K
0.9%
NMRA Neumora Therapeutics, Inc.
28 Sep 2023
10% owner
Bought
41,951
$563.70K
1.1%
NMRA Neumora Therapeutics, Inc.
27 Sep 2023
10% owner
Bought
24,504
$301.64K
0.7%
NMRA Neumora Therapeutics, Inc.
26 Sep 2023
10% owner
Bought
34,000
$398.82K
0.9%
NMRA Neumora Therapeutics, Inc.
25 Sep 2023
10% owner
Bought
60,740
$681.46K
1.7%
NMRA Neumora Therapeutics, Inc.
22 Sep 2023
10% owner
Bought
40,000
$445.60K
1.1%
18 decisions on file.