Summary
Updated Aug 30, 2026
STADIUM CAPITAL MANAGEMENT LLC is 10% Owner of Sleep Number Corp (SNBR). 5 SEC Form 4 filings on record going back to 2024, most recently on 1 June 2026. Most recent open-market trade: sold $107K of SNBR on 1 June 2026. Lifetime open-market purchases: $4.78M. Lifetime open-market sales: $695K. Historical track record: 5/5 stars across 16 tracked purchases.
Recent Transactions
18Every recent SEC Form 4 transaction STADIUM CAPITAL MANAGEMENT LLC has reported, most recent first.
Track Record
InsiderAlpha computes a forward-return-based score for every insider with enough Form 4 purchase history. The metrics below reflect realized performance after each tracked open-market purchase.
| Metric | Value |
|---|---|
| InsiderAlpha rating | ★★★★★ (5/5) |
| Total purchases tracked | 16 |
| Purchases with forward-return data | 16 |
| 30-day win rate | 100% |
| 90-day win rate | 100% |
| Avg 5-day return | +1.12% |
| Avg 30-day return | +33.79% |
| Avg 90-day return | +28.43% |
| Best 30-day return | +56.00% |
Trading Pattern
InsiderAlpha's records for STADIUM CAPITAL MANAGEMENT LLC go back to 2024: 5 primary Form 4 filings, an average of 1.7 per year. The typical open-market purchase is $299K (16 buys totaling $4.78M). The largest single buy on record is $1.13M of SNBR in 2024. Sales side: 2 recorded sales totaling $695K, so the filing history runs buy-heavy by dollar value. No transaction on record carries a Rule 10b5-1 flag - the filings look discretionary rather than pre-scheduled, which makes their timing more informative as a signal.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies STADIUM CAPITAL MANAGEMENT LLC files at. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
- Samuel R. Hellfeld - $2K of SNBR open-market activity in the last 12 months
- Christopher D. Krusmark - $2K of SNBR open-market activity in the last 12 months
- Julie Howard - $1K of SNBR open-market activity in the last 12 months
- Angel L. Mendez - $666 of SNBR open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
Frequently Asked Questions
What is STADIUM CAPITAL MANAGEMENT LLC?
STADIUM CAPITAL MANAGEMENT LLC is an investment firm, tracked as 10% Owner of Sleep Number Corp (SNBR). InsiderAlpha holds 5 primary Form 4 filings for it, the earliest from 2024, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has STADIUM CAPITAL MANAGEMENT LLC submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
Has STADIUM CAPITAL MANAGEMENT LLC been buying or selling stock?
Recorded transactions: 16 open-market purchases ($4.78M) and 2 open-market sales ($695K) across all tracked filings.
How accurate is STADIUM CAPITAL MANAGEMENT LLC's historical track record?
Across 16 tracked purchases, STADIUM CAPITAL MANAGEMENT LLC averaged +33.8% avg 30-day return with a 100% 30-day win rate. InsiderAlpha rates the track record at 5/5 stars.
Where can I see all of STADIUM CAPITAL MANAGEMENT LLC's SEC filings?
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
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