Jacob Steven Leach - SEC Form 4 Insider Trading Activity
Summary
Updated Aug 3, 2026
Jacob Steven Leach has filed 2 SEC Form 4 filings across 2 companies in the last 90 days - active on both sides. Lifetime open-market purchases: $1.00M. Lifetime open-market sales: $57K.
Profile
Jacob Steven Leach is Director at SenesTech, Inc. (SNES). SEC records also connect Leach to DEXCOM INC (DXCM). Leach has reported 7 insider filings with the SEC since 2024. The most recent filing was in June 2026.
| Role | Director |
|---|---|
| Notability | 40/100 |
Board memberships
- SenesTech, Inc.
- DEXCOM INC
Reported roles
- Director
- President, CEO, and Director
Trading Pattern
InsiderAlpha's records for Jacob Steven Leach go back to 2024: 7 primary Form 4 filings, an average of 2.3 per year. The typical open-market purchase is $501K (2 buys totaling $1.00M). The largest single buy on record is $863K of DXCM in 2025. Sales side: 2 recorded sales totaling $57K, 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.
Career & Filing History
Every role Jacob Steven Leach has reported on a Form 4, reconstructed from the filings themselves - reporting insiders must state their relationship to the issuer (officer title, director seat, or 10% ownership) on every filing.
- Director at SenesTech, Inc. (SNES) - 2 filings, 2025 to 2026
- President, CEO, and Director, Director at DEXCOM INC (DXCM) - 3 filings, 2026
- President & COO at DEXCOM INC (DXCM) - 1 filing, 2025
- EVP, Chief Operating Officer at DEXCOM INC (DXCM) - 1 filing, 2024
Recent Transactions
| Date | Ticker | Company | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-05-27 | DXCM | DEXCOM INC | F - Tax withholding / forfeiture | 1.5K | $71.90 | $104K |
| 2026-03-10 | DXCM | DEXCOM INC | F - Tax withholding / forfeiture | 19.8K | $68.10 | $1.35M |
| 2026-03-10 | DXCM | DEXCOM INC | A - Grant or award | 104.5K | $0.00 | |
| 2026-02-02 | DXCM | DEXCOM INC | F - Tax withholding / forfeiture | 3.1K | $73.36 | $224K |
| 2026-02-02 | DXCM | DEXCOM INC | A - Grant or award | 8.3K | $0.00 | |
| 2025-11-19 | SNES | SenesTech, Inc. | S - Open-market sale | 62 | $2.71 | $168 |
| 2025-11-10 | DXCM | DEXCOM INC | P - Open-market purchase | 2.5K | $55.43 | $139K |
| 2025-11-10 | DXCM | DEXCOM INC | P - Open-market purchase | 15.7K | $54.98 | $863K |
| 2024-12-17 | DXCM | DEXCOM INC | S - Open-market sale | 744 | $76.87 | $57K |
Companies - Last 90 Days
- SenesTech, Inc. (SNES) - 1 filing, last 2026-06-17
- DEXCOM INC (DXCM) - 1 filing, last 2026-05-27
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades at the companies Jacob Steven Leach has recently filed at. Multiple unrelated insiders buying the same stock within a short window - cluster buying - has historically been one of the strongest Form 4 signals.
- Kevin R. Sayer - $5.90M of DXCM open-market activity in the last 12 months
- GLENBROOK CAPITAL MANAGEMENT - $958K of SNES open-market activity in the last 12 months
- Jon Coleman - $723K of DXCM open-market activity in the last 12 months
- Michael Jon Brown - $614K of DXCM open-market activity in the last 12 months
- Mark G. Foletta - $519K of DXCM open-market activity in the last 12 months
- Richard Alexander Collins - $389K of DXCM open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
- Mitchell Jacobson
- JANA Partners Management, LP
- Arun Jeldi
- Jan Philipp Jenisch
- Marc Johnson
- James Jones
- Andrew T. Kaplan
- A. J. Kazimi
Frequently Asked Questions
Who is Jacob Steven Leach?
Jacob Steven Leach is Director at SenesTech, Inc. (SNES). SEC records also connect Leach to DEXCOM INC (DXCM). Leach has reported 7 insider filings with the SEC since 2024. The most recent filing was in June 2026.…
How many SEC Form 4 filings has Jacob Steven Leach submitted recently?
2 primary Form 4 filings in the last 90 days, covering 2 companies.
Has Jacob Steven Leach been buying or selling stock?
Recorded transactions: 2 open-market purchases ($1.00M) and 2 open-market sales ($57K) across all tracked filings.
Where can I see all of Jacob Steven Leach'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.
Learn More
Open the live Jacob Steven Leach profile on InsiderAlpha for real-time alerts, AI-scored trade ideas, and full transaction history.