Summary
Updated Aug 31, 2026
Stuart D. Porter is Director of GameSquare Holdings, Inc. (GAME). 8 SEC Form 4 filings on record going back to 2024, most recently on 14 July 2026. Most recent open-market trade: bought $500K of AIRJ on 20 January 2026. Lifetime open-market purchases: $1.50M. Historical track record: 4/5 stars across 4 tracked purchases.
Recent Transactions
11Every recent SEC Form 4 transaction Stuart D. Porter 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 | ★★★★☆ (4/5) |
| Total purchases tracked | 4 |
| Purchases with forward-return data | 4 |
| 30-day win rate | 75% |
| 90-day win rate | 75% |
| Avg 5-day return | +14.94% |
| Avg 30-day return | +31.46% |
| Avg 90-day return | +13.29% |
| Best 30-day return | +45.58% |
Trading Pattern
InsiderAlpha's records for Stuart D. Porter go back to 2024: 8 primary Form 4 filings, an average of 2.7 per year. The typical open-market purchase is $375K (4 buys totaling $1.50M). The largest single buy on record is $779K of AIRJ in 2025. 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 Stuart D. Porter 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.
- Blue & Silver Ventures, Ltd. - $1.65M of GAME open-market activity in the last 12 months
- Jeremi Gorman - $50K of GAME 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
Who is Stuart D. Porter?
Stuart D. Porter is a corporate insider, tracked as Director of GameSquare Holdings, Inc. (GAME). InsiderAlpha holds 8 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has Stuart D. Porter submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
Has Stuart D. Porter been buying or selling stock?
Recorded transactions: 4 open-market purchases ($1.50M) and 0 open-market sales across all tracked filings.
How accurate is Stuart D. Porter's historical track record?
Across 4 tracked purchases, Stuart D. Porter averaged +31.5% avg 30-day return with a 75% 30-day win rate. InsiderAlpha rates the track record at 4/5 stars.
Where can I see all of Stuart D. Porter'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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