Robert Joseph Ball insider trades: Shoulder Innovations (SI) stock buys and sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where Robert reports to the SEC
Open-market buys and sales
4 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Sep 14, 2026 | SI | ↓ Sell | 10,175 | $18.45 | $188K | Direct | Sep 14, 2026 (0d) |
| Mar 13, 2026 | SI | ↑ Buy | 2,200 | $15.18 | $33K | Direct | Mar 17, 2026 (4d) |
| Dec 12, 2025 | SI | ↑ Buy | 7,200 | $14.86 | $107K | Direct | Dec 15, 2025 (3d) |
| Sep 12, 2025 | SI | ↑ Buy | 8,000 | $15.34 | $123K | Direct | Sep 15, 2025 (3d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
Other SI insiders
Open-market trades in the last 12 months
About Robert Joseph Ball's insider trades
Robert Joseph Ball is CEO & Executive Chairman at Shoulder Innovations (SI). Since Sep 12, 2025, Robert has reported 3 open-market purchases worth $263K and 1 sale worth $188K on SEC Form 4. In the last 12 months: 2 buys ($140K) and 1 sale ($188K).
Their filings also include option exercises (4 filings), grants and awards (2 filings), shares withheld for taxes (1 filing), conversions (1 filing). These aren't open-market trades and aren't counted above.
How to read insider trades
Officers, directors and owners of more than 10% of a company must report trades in its stock on SEC Form 4, usually within two business days. Purchases with their own money are the stronger signal: insiders sell for many reasons (taxes, diversification, a house), but buy for one. See every SI insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.