Chang Carmen: insider buys
Every open-market stock purchase reported by Chang Carmen to the SEC on Form 4.
Total bought$17.30M
Purchases2
Companies2
Last purchase filedMar 12, 2026
Return on these buys+29%
Chang Carmen has made 2 open-market purchases worth $17.30M in 2 companies since Feb 11, 2026, according to SEC Form 4 filings. The most recent was filed on Mar 12, 2026: 207,100 shares of KRRO at $11.11 (10% Owner), worth $2.30M. The largest was $15M of SGP on Feb 9, 2026. Taken together, these purchases are up 29% at the latest closing prices (split-adjusted, weighted by amount).
Companies Chang Carmen bought
| Ticker | Company | Role | Buys | Total | Since buy | Last filed |
|---|---|---|---|---|---|---|
| SGP | SpyGlass Pharma, Inc. | 10% Owner | 1 | $15M | — | Feb 11 |
| KRRO | Korro Bio, Inc. | 10% Owner | 1 | $2.30M | +29% | Mar 12 |
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| Filed | Stock | Insider | Value | Shares | Price | Since buy | Stake | Trade | |
|---|---|---|---|---|---|---|---|---|---|
| Mar 12 | KRROKorro Bio, Inc. | Chang Carmen10% Owner | $2.30M | 207,100 | $11.11 | +29% | +19% | Mar 10 | SEC |
| Feb 11 | SGPSpyGlass Pharma, Inc. | Chang Carmen10% Owner | $15M | 937,500 | $16.00 | — | +18% | Feb 9 | SEC |