Robert Joseph Ball is CEO & Chairman at SHOULDER INNOVATIONS, INC. (SI). They have made 4 open-market trades across 1 company since 2025, most recently 2026-09-14.
CIK 0002070664
3 open-market purchases totalling $297K since 2025, against 1 sale. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| SI | 380,824 | $6.9M |
Shares reported on the most recent Form 4, priced at the 2026-09-14 close.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.