Insider Screener
Real-time Form 4 Filtering Engine
| Filing Date | Trade Date | Ticker | Company Name | Reporting Person | Relationship | Industry (by SEC) | Type | Price | Qty | Total, $ | Owned After | Change, % |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026-03-04 02:21 | 2026-03-02 | IRTC | iRhythm Holdings, Inc. | Blackford Quentin S. | Director, Officer; President and CEO | Surgical & Medical Instruments & Apparatus | SALE | $128.44 | 13,813 | $1,774,173 | 204,155 | -6.3% |
| 2026-02-27 01:14 | 2026-02-25 | IRTC | iRhythm Holdings, Inc. | Blackford Quentin S. | Director, Officer; President and CEO | Surgical & Medical Instruments & Apparatus | SALE | $135.42 | 25,540 | $3,458,599 | 186,126 | -12.1% |
| 2025-11-05 01:04 | 2025-11-03 | IRTC | iRhythm Holdings, Inc. | Blackford Quentin S. | Director, Officer; President and CEO | Surgical & Medical Instruments & Apparatus | SALE | $182.94 | 14,059 | $2,571,907 | 164,979 | -7.9% |
| 2025-08-07 00:10 | 2025-08-05 | IRTC | iRhythm Holdings, Inc. | Blackford Quentin S. | Director, Officer; President and CEO | Surgical & Medical Instruments & Apparatus | SALE | $160.54 | 30,000 | $4,816,191 | 179,038 | -14.4% |
| 2025-03-05 00:05 | 2025-03-03 | IRTC | iRhythm Holdings, Inc. | Blackford Quentin S. | Director, Officer; President and CEO | Surgical & Medical Instruments & Apparatus | SALE | $108.77 | 8,145 | $885,932 | 208,741 | -3.8% |
| 2025-02-28 00:03 | 2025-02-26 | IRTC | iRhythm Holdings, Inc. | Blackford Quentin S. | Director, Officer; President and CEO | Surgical & Medical Instruments & Apparatus | SALE | $112.13 | 22,252 | $2,495,117 | 216,886 | -9.3% |
| 2024-11-05 19:59 | 2024-11-04 | IRTC | iRhythm Holdings, Inc. | Blackford Quentin S. | Director, Officer; President and CEO | Surgical & Medical Instruments & Apparatus | SALE | $77.41 | 16,145 | $1,249,784 | 159,929 | -9.2% |
| 2024-03-09 04:55 | 2024-03-07 | ATEC | Alphatec Holdings, Inc. | Blackford Quentin S. | Director | Surgical & Medical Instruments & Apparatus | BUY | $12.83 | 20,000 | $256,600 | 572,605 | +3.6% |
| 2024-03-06 00:52 | 2024-03-04 | IRTC | iRhythm Holdings, Inc. | Blackford Quentin S. | Director, Officer; President and CEO | Surgical & Medical Instruments & Apparatus | SALE | $111.14 | 4,221 | $469,122 | 175,794 | -2.3% |
| 2024-03-02 03:19 | 2024-02-29 | IRTC | iRhythm Holdings, Inc. | Blackford Quentin S. | Director, Officer; President and CEO | Surgical & Medical Instruments & Apparatus | SALE | $121.96 | 24,701 | $3,012,534 | 180,015 | -12.1% |
| 2023-12-07 03:08 | 2023-06-06 | IRTC | iRhythm Holdings, Inc. | Blackford Quentin S. | Director, Officer; President and CEO | Surgical & Medical Instruments & Apparatus | BUY | $102.27 | 9,755 | $997,644 | 128,510 | +8.2% |
| 2022-11-04 21:20 | 2022-11-02 | IRTC | iRhythm Holdings, Inc. | Blackford Quentin S. | Director, Officer; President and CEO | Surgical & Medical Instruments & Apparatus | SALE | $122.40 | 12,699 | $1,554,398 | 89,280 | -12.5% |
| 2021-09-10 23:15 | 2021-09-08 | DXCM | DEXCOM INC | Blackford Quentin S. | Officer; Chief Operating Officer | Surgical & Medical Instruments & Apparatus | SALE | $547.62 | 18,662 | $10,219,647 | 19,280 | -49.2% |
| 2021-06-02 04:14 | 2021-05-28 | DXCM | DEXCOM INC | Blackford Quentin S. | Officer; Chief Operating Officer | Surgical & Medical Instruments & Apparatus | SALE | $375.00 | 7,223 | $2,708,625 | 37,942 | -16.0% |
| 2021-03-13 01:38 | 2021-03-10 | DXCM | DEXCOM INC | Blackford Quentin S. | Officer; Chief Operating Officer & CFO | Surgical & Medical Instruments & Apparatus | SALE | $362.22 | 6,509 | $2,357,688 | 45,165 | -12.6% |
| 2020-09-12 01:57 | 2020-09-09 | DXCM | DEXCOM INC | Blackford Quentin S. | Officer; Chief Operating Officer & CFO | Surgical & Medical Instruments & Apparatus | SALE | $399.41 | 25,079 | $10,016,864 | 44,124 | -36.2% |
| 2020-06-05 23:48 | 2019-08-09 | AXGN | Axogen, Inc. | Blackford Quentin S. | Director | Electromedical & Electrotherapeutic Apparatus | BUY | $14.01 | 15,535 | $217,672 | 15,535 | +100.0% |
| 2020-03-14 04:17 | 2020-03-11 | DXCM | DEXCOM INC | Blackford Quentin S. | Officer; Chief Operating Officer & CFO | Surgical & Medical Instruments & Apparatus | SALE | $248.98 | 12,561 | $3,127,448 | 69,203 | -15.4% |
| 2020-03-11 03:19 | 2020-03-09 | DXCM | DEXCOM INC | Blackford Quentin S. | Officer; Chief Operating Officer & CFO | Surgical & Medical Instruments & Apparatus | SALE | $261.00 | 891 | $232,551 | 81,764 | -1.1% |
| 2019-09-12 23:25 | 2019-09-10 | DXCM | DEXCOM INC | Blackford Quentin S. | Officer; EVP Chief Financial Officer | Surgical & Medical Instruments & Apparatus | SALE | $141.25 | 10,320 | $1,457,692 | 69,754 | -12.9% |
| 2019-09-12 04:36 | 2019-09-09 | DXCM | DEXCOM INC | Blackford Quentin S. | Officer; EVP Chief Financial Officer | Surgical & Medical Instruments & Apparatus | SALE | $149.86 | 11,686 | $1,751,231 | 80,074 | -12.7% |
| 2019-08-13 15:45 | 2019-08-09 | AXGN | Axogen, Inc. | Blackford Quentin S. | Director | Electromedical & Electrotherapeutic Apparatus | BUY | $14.01 | 15,535 | $217,672 | 39,468 | +64.9% |
| 2019-05-30 23:56 | 2019-05-29 | DXCM | DEXCOM INC | Blackford Quentin S. | Officer; EVP Chief Financial Officer | Surgical & Medical Instruments & Apparatus | SALE | $118.95 | 8,874 | $1,055,527 | 91,740 | -8.8% |
| 2019-03-14 02:00 | 2019-03-12 | DXCM | DEXCOM INC | Blackford Quentin S. | Officer; EVP Chief Financial Officer | Surgical & Medical Instruments & Apparatus | SALE | $142.79 | 5,358 | $765,081 | 100,614 | -5.1% |
| 2018-09-14 04:48 | 2018-09-11 | DXCM | DEXCOM INC | Blackford Quentin S. | Officer; EVP, CFO, PFO & PAO | Surgical & Medical Instruments & Apparatus | SALE | $147.04 | 8,440 | $1,241,028 | 87,131 | -8.8% |
| 2018-09-13 04:18 | 2018-09-10 | DXCM | DEXCOM INC | Blackford Quentin S. | Officer; EVP, CFO, PFO & PAO | Surgical & Medical Instruments & Apparatus | SALE | $143.76 | 7,149 | $1,027,706 | 95,571 | -7.0% |
| 2015-12-08 04:39 | 2015-12-07 | NUVA | N/A | Blackford Quentin S. | Officer; CFO and CAO | Other | SALE | $51.10 | 15,000 | $766,500 | 2,599 | -85.2% |
| 2015-04-09 00:52 | 2014-10-03 | NUVA | N/A | Blackford Quentin S. | Officer; CFO and CAO | Other | SALE | $36.30 | 5,000 | $181,513 | 12,902 | -27.9% |
| 2014-11-21 00:54 | 2014-11-19 | NUVA | N/A | Blackford Quentin S. | Officer; CFO and CAO | Other | OPT+S | $43.41 | 7,698 | $334,178 | 800 | -90.6% |
Strategic Signal Filtering
Our screener allows you to cut through the noise of routine stock grants and small trades. By focusing on high-value transactions from C-suite executives (CEO/CFO), you can identify where the "Smart Money" is being deployed with maximum conviction.
Investing Without Illusions
Insider data is not a magic wand, but it is the most honest indicator available. While insiders sell for many reasons (taxes, personal needs), they generally buy for only one: they believe the stock price is undervalued. We provide the tools to track these skin-in-the-game moves.
UNDERSTANDING THE DATA
FILING DATE: The date and time when the transaction was reported to the SEC. This is when the public first receives the information.
TRADE DATE: The actual day the insider executed the purchase or sale in the market.
INDUSTRY: The specific market sector the company operates in. Useful for identifying broader institutional capital flows across sectors.
OWNED AFTER: The total number of shares held by the insider following the transaction. This highlights the insider's remaining conviction in the company.
CHANGE %: The percentage increase or decrease of the insider's total position. Large percentage changes often carry more weight than the dollar amount alone.
TRADE TYPES DEFINITIONS
BUY: An open market purchase. Typically indicates an insider's belief that the stock is undervalued or poised for growth.
SELL: An open market sale. While often used for diversification or liquidity, large or unexpected sales can be a warning signal.
OPT+S (OPTION EXERCISE & SALE): This occurs when an insider exercises their stock options and sells them immediately. Often part of a structured compensation plan.