Robert Joseph Ball bought $107k of SI
CEO & Executive Chairman at SHOULDER INNOVATIONS, INC.. 7,200 shares at an average of $14.86, traded Dec 11, 2025, filed Dec 15, 2025.
Score components
- +25RoleCEO
- +10Trade size$107k at market
- +3Relative to holdingsHoldings up 6%
- 0Price contextNear the top of the 52-week range
- +8Cluster2 insiders buying within 14 days
- 0Repeat buyingFirst buy in 90 days
- 0Track recordToo few past buys to judge (0 with prices)
What happened after comparable buys
Same side and tier, against the S&P 500, at 1, 3 and 6 months. Shown to Pro users; the whole table is on the backtest page.
This signal so far: 1m -6.2%, 3m +5.7%, 6m +25.4%.
Price around the trade, and since
From a quarter before the trade to today. The arrow is the trade, the circle the day the filing reached EDGAR, which is the first day anyone outside could act; the dotted line is the S&P 500 rebased to that day's close.
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value; the dashed line is the close on the filing day, the dotted line SPY rebased to it.Charts by TradingView Lightweight Charts™
Rows in this filing
Every transaction in Form 4 0001628280-25-057067, as filed. Open on EDGAR
| Date | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|
| Dec 11, 2025 | POpen-market purchase Common Stock | +3,300 | $14.83 | $49k | 114,557 | Dec 15, 2025 |
| Dec 12, 2025 | POpen-market purchase Common Stock | +3,900 | $14.89 | $58k | 118,457 | Dec 15, 2025 |
Related signals
Other insiders at SHOULDER INNOVATIONS, INC. and this insider’s other filings.
| Score | Company | Insider | Value | Holdings | Filed |
|---|---|---|---|---|---|
| 22Weak | SIsell SHOULDER INNOVATIONS, INC. | Robert Joseph Ball CEO & Executive Chairman | $188k 10,175 shares | -3% | |
| 25Weak | SHOULDER INNOVATIONS, INC. | Gilde Healthcare Holding B.V. owner | $27k 1,196 shares | -0% | |
| 39Weak | SHOULDER INNOVATIONS, INC. | Gilde Healthcare Holding B.V. owner | $567k 25,097 shares | -1% | |
| 25Weak | SHOULDER INNOVATIONS, INC. | Matthew Fraser Ahearn Chief Operating Officer | $465k 22,500 shares | -8% | |
| 32Weak | SHOULDER INNOVATIONS, INC. | Gilde Healthcare Holding B.V. owner | $213k 9,433 shares | -0% | |
| 45Moderate | SHOULDER INNOVATIONS, INC. | Gilde Healthcare Holding B.V. owner | $2.5M 110,563 shares | -5% | |
| 37Weak | SIsell SHOULDER INNOVATIONS, INC. | Gilde Healthcare Holding B.V. owner | $1.1M 48,279 shares | -2% | |
| 15Weak | SHOULDER INNOVATIONS, INC. | Matthew Fraser Ahearn Chief Operating Officer | $374k 20,000 shares | -7% | |
| 41Moderate | SHOULDER INNOVATIONS, INC. | Robert Joseph Ball CEO & Executive Chairman | $33k 2,200 shares | +1% | |
| 33Weak | SHOULDER INNOVATIONS, INC. | Richard Buchholz director | $15k 1,000 shares | +8% |
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.