Ball Robert Joseph sold $188K of SI
Ball Robert Joseph (CEO & Executive Chairman) sold 10,175 shares of SHOULDER INNOVATIONS, INC. (SI) at $18.45 ($0.19M total) on 2026-09-14.
How this was made
The 30-second read
Why it matters
The sale is modest and unlikely to move the stock significantly, but may be noted by short-term traders.
Market read
Small insider sale with limited market impact.
What to watch
No change in company fundamentals; sale may be unrelated to performance.
Background
Form 4 filing provides the first public disclosure of the insider transaction.
Ticker impact
CEO Robert Ball sold 10,175 shares of Shoulder Innovations for $187,706, reducing his stake to 380,824 shares.
Potential slight downward pressure on SI price.
Sale amount is under $200K and represents a small percentage of total holdings; market reaction likely limited.
Market effects
Minor signal for biotech sector insider activity.
U.S. market only.
Low
Counterpoint
Insider sale could be routine liquidity need, not a negative signal.
Key entities
- CompanyShoulder Innovations, Inc.
Biotech firm listed on NASDAQ under ticker SI.
- ExecutiveRobert Ball
CEO and Executive Chairman of Shoulder Innovations.


