Insiders / Blumenkranz Mark S.
Blumenkranz Mark S.
CIK 1614869personinsider
Companies
6
First seen
Jan 15, 2015
Last activity
Aug 12, 2026
Holdings
6 companies · 5 positionsView all →
| Company / security | Shares held | Latest |
|---|---|---|
| Avalanche Biotechnologies, Inc. · AAVL | 658,520 | — |
| Common stock | 658,520 | Jan 13, 2015 |
| Annexon, Inc. · ANNX | — | — |
| Options | 175,000 | Aug 10, 2026 |
| Kala Pharmaceuticals, Inc. · KALA | 14,367 | — |
| Common stock | 14,367 | Jun 11, 2024 |
| Options | 3,150 | Jun 11, 2024 |
| Presbia PLC · LENS | 9,270 | — |
| Ordinary shares | 9,270 | Mar 16, 2015 |
| 1Life Healthcare Inc · ONEM | 0 | — |
| Ophthotech Corp. · ISEE | 0 | — |
Ownership percentages elsewhere on the site count common and ordinary shares only, because that is what shares outstanding are measured in. Everything above is a real holding; not all of it is a share of the company.
Activity
InsidersInstitutions
This person's trades in company stock, across every company.| Date | Action | Company | Value | Shares Δ | Position after | Impact |
|---|---|---|---|---|---|---|
| Jan 13, 2015 | Sell Open-market sale | AAVL Avalanche Biotechnologies, Inc. Common Stock | $5.55M | -100K -13.41% | 645,989 | medium |
| Feb 22, 2023 | Other Sold to issuer | ONEM 1Life Healthcare Inc Common Stock | $81.6K | -5K -100.00% | 0 | low |
| Mar 16, 2015 | Grant Grant or award | LENS Presbia PLC Ordinary Shares | $0 | +9K |