ARCH VENTURE PARTNERS X, LLC purchased 94.7% of their position (3.03M shares) of PRIME MEDICINE, INC. on the open market
Open‑market purchase worth $10.00M — a major conviction buy. The strongest form of insider conviction signal.
P · 1 purchase
Filed: 8/1/2025ACC: 0001062993-25-013460
10% Owner
Since Oct 2022
+3.03M
Net shares
Net buyer
$10.00M
Total acquired
1
Open market trades
1B · 0S
1
Total transactions
3.03M acquired
Non-Derivative Transactions1
Common Stock
Indirect
Shares
+3.03M
Price / share
$3.30
Trade value
$10M
% of position
94.7%
8/1/2025
3.20M→6.23M
Total
Net shares
+3.03M
Net value
$10M
| Security | Date | Type | Shares | Price / Share | Trade Value | % of Position | Held Before | Held After |
|---|---|---|---|---|---|---|---|---|
| Common Stock Indirect | 8/1/2025 | P · Purchase | +3.03M | $3.30 | $10M | 94.7% | 3.20M | 6.23M |
| Total | +3.03M | $10M | ||||||
Derivative Transactions0
No derivative transactions reported
Non-Derivative Holdings (Post-Transaction)2
Common Stock
IndirectShares owned6.13M
Common Stock
IndirectShares owned6.13M
Total
12.26M indirect12.26M
| Security Title | Shares Owned | Ownership Type |
|---|---|---|
| Common Stock | 6.13M | Indirect |
| Common Stock | 6.13M | Indirect |
| Total | 12.26M | 12.26M indirect |
Derivative Holdings (Post-Transaction)0
No derivative holdings reported