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GenMark Diagnostics, Inc. Insider Trading Activity
Every SEC Form 4 insider transaction reported for GenMark Diagnostics, Inc. (GNMK), sourced directly from SEC EDGAR and updated as new filings are accepted.
By Trabud · Insider-trading data from SEC EDGAR
Latest filing:
Compiled automatically from SEC EDGAR Form 4 filings and refreshed daily. Figures count purchases (code P) and sales (code S) only — not grants, option exercises, or gifts. How this page is built. Not investment advice.
Quick Answer
Are GNMK insiders buying or selling?
GenMark Diagnostics, Inc. insiders reported no open-market purchases or sales in the last 12 months. Since January 2018, Trabud has recorded 343 Form 4 filings for GNMK: 4 buys ($186.7K) and 339 sells ($18.4M).
Source: SEC EDGAR Form 4
Key Statistics (January 2018 – Mar 22, 2021)
Total Form 4 filings
343
SEC EDGAR
Insider filers
18
Insider buys (4)
$186.7K
Insider sells (339)
$18.4M
Insider sentiment
Net sellingNet insider flow of $18.2M in net selling since January 2018.
Recent GNMK insider transactions
| Date | Insider | Role | Type | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| Mar 22, 2021 | Tyler Jensen | SVP, Engineering and Tech Dev | Sale | 500 | $23.88 | $11.9K | SEC ↗ |
| Mar 8, 2021 | Tyler Jensen | SVP, Engineering and Tech Dev | Sale | 500 | $18.86 | $9.4K | SEC ↗ |
| Mar 8, 2021 | Christine Shaw | VP, Assay Development | Sale | 274 | $18.56 | $5.1K | SEC ↗ |
| Mar 1, 2021 | Alan Baer Maderazo | VP, Qual, Reg, & Clin Affairs | Sale | 2.1K | $19.19 | $40.8K | SEC ↗ |
| Mar 1, 2021 | Michael Gleeson | SVP, Corp. Accounts | Sale | 17.8K | $17.01 | $301.9K | SEC ↗ |
| Mar 1, 2021 | Michael John Harkins | SVP, Sales | Sale | 12.4K | $17.03 | $210.8K | SEC ↗ |
| Mar 1, 2021 | Sarah Hollis Winkler | VP, Human Resources | Sale | 11.2K | $17.01 | $190.2K | SEC ↗ |
| Mar 1, 2021 | Christine Shaw | VP, Assay Development | Sale | 3.2K | $17.03 | $53.7K | SEC ↗ |
| Feb 25, 2021 | Alan Baer Maderazo | VP, Qual, Reg, & Clin Affairs | Sale | 266 | $19.16 | $5.1K | SEC ↗ |
| Feb 25, 2021 | Michael Gleeson | SVP, Corp. Accounts | Sale | 3.9K | $19.20 | $74.8K | SEC ↗ |
| Feb 25, 2021 | Christine Shaw | VP, Assay Development | Sale | 425 | $19.21 | $8.2K | SEC ↗ |
| Feb 24, 2021 | Alan Baer Maderazo | VP, Qual, Reg, & Clin Affairs | Sale | 163 | $19.12 | $3.1K | SEC ↗ |
| Feb 23, 2021 | Sarah Hollis Winkler | VP, Human Resources | Sale | 654 | $21.80 | $14.3K | SEC ↗ |
| Feb 23, 2021 | Michael Gleeson | SVP, Corp. Accounts | Sale | 2.3K | $21.80 | $51.0K | SEC ↗ |
| Feb 23, 2021 | Alan Baer Maderazo | VP, Qual, Reg, & Clin Affairs | Sale | 290 | $20.36 | $5.9K | SEC ↗ |
| Feb 22, 2021 | Tyler Jensen | SVP, Engineering and Tech Dev | Sale | 500 | $21.68 | $10.8K | SEC ↗ |
| Feb 16, 2021 | Tyler Jensen | SVP, Engineering and Tech Dev | Sale | 10.0K | $22.00 | $220.0K | SEC ↗ |
| Feb 8, 2021 | Tyler Jensen | SVP, Engineering and Tech Dev | Sale | 500 | $14.69 | $7.3K | SEC ↗ |
| Jan 29, 2021 | Alan Baer Maderazo | VP, Qual, Reg, & Clin Affairs | Sale | 6.2K | $15.19 | $94.4K | SEC ↗ |
| Jan 29, 2021 | Tyler Jensen | SVP, Engineering and Tech Dev | Sale | 322 | $14.06 | $4.5K | SEC ↗ |
| Jan 29, 2021 | Scott Alexander O'Brien | SVP, Global Mktg & Int'l Sales | Sale | 180 | $14.06 | $2.5K | SEC ↗ |
| Jan 29, 2021 | Christine Shaw | VP, Assay Development | Sale | 81 | $14.06 | $1.1K | SEC ↗ |
| Jan 29, 2021 | Michael John Harkins | SVP, Sales | Sale | 1.1K | $14.06 | $15.7K | SEC ↗ |
| Jan 29, 2021 | Sarah Hollis Winkler | VP, Human Resources | Sale | 783 | $14.06 | $11.0K | SEC ↗ |
| Jan 26, 2021 | Michael Gleeson | SVP, Corp. Accounts | Sale | 33.0K | $14.22 | $469.6K | SEC ↗ |
Showing the 25 most recent of 343 Form 4 filings for GenMark Diagnostics, Inc..
Most active GNMK insiders
- Brian Andrew Mitchell46 filings
- Michael Gleeson41 filings
- Eric Stier38 filings
- Scott Mendel38 filings
- Tyler Jensen36 filings
Ask anything about GNMK insider activity
Use Trabud's AI agent to query GenMark Diagnostics, Inc.'s Form 4 history in plain English — "Show me GNMK CEO purchases this year" or compare it against any other ticker.
Open the AI agentGNMK insider trading FAQ
Are GenMark Diagnostics, Inc. insiders buying or selling?
GenMark Diagnostics, Inc. insiders reported no open-market purchases or sales in the last 12 months. Since January 2018, Trabud has recorded 343 Form 4 filings for GNMK: 4 buys ($186.7K) and 339 sells ($18.4M). Over the full record that is net selling of $18.2M.
How many insiders trade GNMK stock?
18 distinct insider filers — officers, directors, 10%+ owners, and investment groups filing jointly — have reported Form 4 transactions for GenMark Diagnostics, Inc.. The most recent filing was accepted on Mar 22, 2021.
Where does Trabud get GNMK insider trading data?
All GNMK insider trading data comes directly from official SEC EDGAR Form 4 filings, which corporate insiders must submit within two business days of a transaction under Section 16(a) of the Securities Exchange Act of 1934.