TANANBAUM JAMES B. purchased 2.8% of their position (72.21K shares) of ALUMIS INC. on the open market
Open‑market purchase worth $532.9K — a small addition. The strongest form of insider conviction signal.
P · 1 purchase
Filed: 11/25/2025ACC: 0001104659-25-115950
+72.21K
Net shares
Net buyer
$532.9K
Total acquired
1
Open market trades
1B · 0S
1
Total transactions
72.21K acquired
Non-Derivative Transactions1
Common Stock
Indirect
Shares
+72.21K
Price / share
$7.38
Trade value
$532.92K
% of position
2.8%
11/21/2025
2.54M→2.61M
Total
Net shares
+72.21K
Net value
$532.92K
| Security | Date | Type | Shares | Price / Share | Trade Value | % of Position | Held Before | Held After |
|---|---|---|---|---|---|---|---|---|
| Common Stock Indirect | 11/21/2025 | P · Purchase | +72.21K | $7.38 | $532.92K | 2.8% | 2.54M | 2.61M |
| Total | +72.21K | $532.92K | ||||||
Derivative Transactions0
No derivative transactions reported
Non-Derivative Holdings (Post-Transaction)5
Common Stock
IndirectShares owned4.25M
Common Stock
IndirectShares owned194.46K
Common Stock
IndirectShares owned5.58M
Common Stock
IndirectShares owned1.18M
Common Stock
IndirectShares owned1.96M
Total
13.16M indirect13.16M
| Security Title | Shares Owned | Ownership Type |
|---|---|---|
| Common Stock | 4.25M | Indirect |
| Common Stock | 194.46K | Indirect |
| Common Stock | 5.58M | Indirect |
| Common Stock | 1.18M | Indirect |
| Common Stock | 1.96M | Indirect |
| Total | 13.16M | 13.16M indirect |
Derivative Holdings (Post-Transaction)0
No derivative holdings reported