Summary
Updated Aug 31, 2026
Thomas L. Carter Jr. is Executive Chairman, Director of Black Stone Minerals, L.P. (BSM). 9 SEC Form 4 filings on record going back to 2025, most recently on 14 May 2026. Most recent open-market trade: bought $15K of BSM on 14 May 2026. Lifetime open-market purchases: $2.91M. Historical track record: 4/5 stars across 15 tracked purchases.
Recent Transactions
18Every recent SEC Form 4 transaction Thomas L. Carter Jr. 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 | 15 |
| Purchases with forward-return data | 15 |
| 30-day win rate | 87% |
| 90-day win rate | 100% |
| Avg 5-day return | +2.51% |
| Avg 30-day return | +3.53% |
| Avg 90-day return | +12.09% |
| Best 30-day return | +12.16% |
Trading Pattern
InsiderAlpha's records for Thomas L. Carter Jr. go back to 2025: 9 primary Form 4 filings, an average of 4.5 per year. The typical open-market purchase is $194K (15 buys totaling $2.91M). The largest single buy on record is $337K of BSM in 2026. 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 Thomas L. Carter Jr. 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.
- James Whitehead - $28.10M of BSM open-market activity in the last 12 months
- D. Mark Dewalch - $1.48M of BSM open-market activity in the last 12 months
- Luke Stevens Putman - $1.31M of BSM open-market activity in the last 12 months
- Ashley J. Longmaid - $150K of BSM 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 Thomas L. Carter Jr.?
Thomas L. Carter Jr. is a corporate insider, tracked as Executive Chairman, Director of Black Stone Minerals, L.P. (BSM). InsiderAlpha holds 9 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
When did Thomas L. Carter Jr. last file a Form 4?
The most recent primary Form 4 on record is dated 14 May 2026, one of 9 filings going back to 2025.
Has Thomas L. Carter Jr. been buying or selling stock?
Recorded transactions: 15 open-market purchases ($2.91M) and 0 open-market sales across all tracked filings.
How accurate is Thomas L. Carter Jr.'s historical track record?
Across 15 tracked purchases, Thomas L. Carter Jr. averaged +3.5% avg 30-day return with a 87% 30-day win rate. InsiderAlpha rates the track record at 4/5 stars.
Where can I see all of Thomas L. Carter Jr.'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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