Michael Garnreiter - SEC Form 4 Insider Trading Activity
Summary
Updated Aug 3, 2026
Michael Garnreiter has filed 2 SEC Form 4 filings across 2 companies in the last 90 days - selling. Lifetime open-market sales: $6.24M.
Profile
Michael Garnreiter holds the role of Director at AXON ENTERPRISE, INC. (AXON). Garnreiter's filing history also covers Knight-Swift Transportation Holdings Inc. (KNX) and AMTECH SYSTEMS INC (ASYS). Garnreiter has reported 9 insider filings with the SEC since 2024. The most recent filing was in June 2026.
| Role | Director |
|---|---|
| Notability | 26/100 |
Board memberships
- AXON ENTERPRISE, INC.
- Knight-Swift Transportation Holdings Inc.
- AMTECH SYSTEMS INC
Reported roles
- Director
- Director
Trading Pattern
InsiderAlpha's records for Michael Garnreiter go back to 2024: 9 primary Form 4 filings, an average of 3.0 per year. 14 recorded transactions carry a Rule 10b5-1 flag, meaning they were pre-scheduled under a written trading plan rather than discretionary.
Career & Filing History
Every role Michael Garnreiter 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 AXON ENTERPRISE, INC. (AXON) - 3 filings, 2025 to 2026
- Director at Knight-Swift Transportation Holdings Inc. (KNX) - 2 filings, 2025 to 2026
- Insider at AMTECH SYSTEMS INC (ASYS) - 1 filing, 2026
- Insider at AXON ENTERPRISE, INC. (AXON) - 3 filings, 2024
Recent Transactions
| Date | Ticker | Company | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-06-01 | AXON | AXON ENTERPRISE, INC. | A - Grant or award | 47 | $0.00 | |
| 2026-06-01 | AXON | AXON ENTERPRISE, INC. | A - Grant or award | 611 | $0.00 | |
| 2026-05-13 | KNX | Knight-Swift Transportation Holdings Inc. | A - Grant or award | 2.8K | $59.90 | $170K |
| 2026-03-06 | ASYS | AMTECH SYSTEMS INC | M - Option exercise | 8.1K | $0.00 | |
| 2025-06-03 | AXON | AXON ENTERPRISE, INC. | S - Open-market sale | 5.9K | $760.00 | $4.49M |
| 2025-06-03 | AXON | AXON ENTERPRISE, INC. | G - Bona-fide gift | 1.0K | $0.00 | |
| 2025-06-03 | AXON | AXON ENTERPRISE, INC. | S - Open-market sale | 87 | $760.00 | $66K |
| 2025-05-29 | AXON | AXON ENTERPRISE, INC. | A - Grant or award | 35 | $0.00 | |
| 2025-05-29 | AXON | AXON ENTERPRISE, INC. | A - Grant or award | 446 | $0.00 | |
| 2025-05-13 | KNX | Knight-Swift Transportation Holdings Inc. | A - Grant or award | 3.3K | $46.05 | $150K |
| 2024-12-16 | AXON | AXON ENTERPRISE, INC. | S - Open-market sale [10b5-1] | 50 | $652.05 | $33K |
| 2024-12-16 | AXON | AXON ENTERPRISE, INC. | S - Open-market sale [10b5-1] | 90 | $649.34 | $58K |
| 2024-12-16 | AXON | AXON ENTERPRISE, INC. | S - Open-market sale [10b5-1] | 350 | $646.98 | $226K |
| 2024-12-16 | AXON | AXON ENTERPRISE, INC. | S - Open-market sale [10b5-1] | 100 | $643.79 | $64K |
| 2024-12-16 | AXON | AXON ENTERPRISE, INC. | S - Open-market sale [10b5-1] | 50 | $642.49 | $32K |
| 2024-12-16 | AXON | AXON ENTERPRISE, INC. | S - Open-market sale [10b5-1] | 50 | $638.01 | $32K |
| 2024-12-16 | AXON | AXON ENTERPRISE, INC. | S - Open-market sale [10b5-1] | 60 | $633.80 | $38K |
| 2024-12-16 | AXON | AXON ENTERPRISE, INC. | S - Open-market sale [10b5-1] | 50 | $630.96 | $32K |
| 2024-12-16 | AXON | AXON ENTERPRISE, INC. | S - Open-market sale [10b5-1] | 50 | $626.02 | $31K |
| 2024-12-16 | AXON | AXON ENTERPRISE, INC. | S - Open-market sale [10b5-1] | 50 | $622.46 | $31K |
Companies - Last 90 Days
- AXON ENTERPRISE, INC. (AXON) - 1 filing, last 2026-06-01
- Knight-Swift Transportation Holdings Inc. (KNX) - 1 filing, last 2026-05-13
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades at the companies Michael Garnreiter 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.
- Patrick W. Smith - $60.84M of AXON open-market activity in the last 12 months
- Joshua Isner - $39.98M of AXON open-market activity in the last 12 months
- Brittany Bagley - $11.02M of AXON open-market activity in the last 12 months
- Jeffrey C. Kunins - $6.89M of AXON open-market activity in the last 12 months
- Kevin P. Knight - $6.03M of KNX open-market activity in the last 12 months
- Reid Dove - $3.51M of KNX open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
- Andrew J. Mills
- Charles N. Mills
- Kevin J. Mills
- Mink Brook Asset Management LLC
- Shankh Mitra
- MITSUI SUMITOMO INSURANCE CO LTD
- Arturo R. Moreno
- Matthew T. Moroun
Frequently Asked Questions
Who is Michael Garnreiter?
Michael Garnreiter holds the role of Director at AXON ENTERPRISE, INC. (AXON). Garnreiter's filing history also covers Knight-Swift Transportation Holdings Inc. (KNX) and AMTECH SYSTEMS INC (ASYS). Garnreiter has reported 9 insider filings with the SEC since 2024. The most recent filing was in June 2026.…
How many SEC Form 4 filings has Michael Garnreiter submitted recently?
2 primary Form 4 filings in the last 90 days, covering 2 companies.
Has Michael Garnreiter been buying or selling stock?
Recorded transactions: 0 open-market purchases and 16 open-market sales ($6.24M) across all tracked filings.
Where can I see all of Michael Garnreiter'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
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