$SI

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.

Original reporting
SEC EDGAR · Ball Robert Joseph
Published Sep 15, 2026, 12:23 AM UTC
Analysis
AlphAI AI DeskAI-generated
Added to AlphAI Sep 15, 2026, 12:38 AM UTC. Informational, not investment advice.
How this was made
AlphAI summarizes source reporting and applies a structured AI analysis for relevance, timing, sentiment and ticker impact. Always verify material claims with the original publisher.
AlphAI market briefInsider activity
Primary signal
$SI
Neutral
medium confidence
Mentioned
$SI
Relevance
4/10
AlphAI data visualization · based on SEC EDGAR
Decision brief

The 30-second read

$SINeutralLow
01

Why it matters

The sale is modest and unlikely to move the stock significantly, but may be noted by short-term traders.

02

Market read

Small insider sale with limited market impact.

03

What to watch

No change in company fundamentals; sale may be unrelated to performance.

Relevance 4/10Novelty 4/10Timing: post-market 2026-09-14 filing

Background

Form 4 filing provides the first public disclosure of the insider transaction.

Company-level read

Ticker impact

$SINeutralMedium confidence
Context

CEO Robert Ball sold 10,175 shares of Shoulder Innovations for $187,706, reducing his stake to 380,824 shares.

Expected impact

Potential slight downward pressure on SI price.

Evidence & confidence

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

  • Shoulder Innovations, Inc.

    Biotech firm listed on NASDAQ under ticker SI.

  • Robert Ball

    CEO and Executive Chairman of Shoulder Innovations.

Full insider trading history

This story covers one filing. See everything behind it: every insider buy and sell on record, 10b5-1 plans, late filings, and which officers and directors are trading.

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