- Corporate Officers - H
- Heiden William K
Insider Trading History of Heiden William K
The following table details the insider trading activities
(stock purchases, stock sales, and stock option exercises) of Heiden William K since 2015.
This trader's CIK number is 1214939.
At the time of last reporting, Heiden William K was the Director of Macrogenics Inc. (stock ticker symbol MGNX).
Also see all insider trading activities at Macrogenics Inc.
Note that in the past
HEIDEN WILLIAM K also reported insider trading activities as an insider of the following companies:
Yearly summary of insider trading at Amag Pharmaceuticals, Inc. (AMAG) by Heiden William K
| | Insider Buying | Insider Sales | Option Exercises |
|---|
| Year | Symbol | Shares | Value | Shares | Value | Shares | Value |
|---|
| 2019 | AMAG | 10,000 | $107,000 | 0 | $0 | 0 | $0 |
| 2018 | AMAG | 0 | $0 | 25,000 | $625,000 | 0 | $0 |
| 2015 | AMAG | 0 | $0 | 94,875 | $6,637,782 | 80,000 | $1,039,200 |
Yearly summary of insider trading at Macrogenics Inc (MGNX) by Heiden William K
| | Insider Buying | Insider Sales | Option Exercises |
|---|
| Year | Symbol | Shares | Value | Shares | Value | Shares | Value |
|---|
| 2025 | MGNX | 100,000 | $150,515 | 0 | $0 | 6,500 | $0 |
| 2024 | MGNX | 0 | $0 | 0 | $0 | 4,500 | $0 |
Yearly summary of insider trading at Atara Biotherapeutics, Inc. (ATRA) by Heiden William K
| | Insider Buying | Insider Sales | Option Exercises |
|---|
| Year | Symbol | Shares | Value | Shares | Value | Shares | Value |
|---|
| 2023 | ATRA | 100,000 | $25,300 | 0 | $0 | 0 | $0 |
Insider trading activities at 3 companies by Heiden William K:
1. Amag Pharmaceuticals, Inc. (AMAG)
2. Macrogenics Inc (MGNX)
3. Atara Biotherapeutics, Inc. (ATRA)
Table 1. Insider trading of Amag Pharmaceuticals, Inc. (AMAG) by Heiden William K
| Trade Date | Symbol | Trade Type | Shares | Price ($) | Value ($) |
|---|
| 2019-05-09 | AMAG | Buy | 10,000 | 10.70 | 107,000 |
| 2018-08-07 | AMAG | Sale | 5,000 | 25.00 | 125,000 |
| 2018-06-04 | AMAG | Sale | 20,000 | 25.00 | 500,000 |
| 2015-10-01 | AMAG | Sale | 2,000 | 39.69 | 79,380 |
| 2015-09-01 | AMAG | Sale | 2,000 | 61.19 | 122,380 |
| 2015-08-03 | AMAG | Sale | 2,000 | 64.53 | 129,060 |
| 2015-07-15 | AMAG | Option Ex | 20,000 | 12.99 | 259,800 |
| 2015-07-15 | AMAG | Sale | 20,000 | 75.00 | 1,500,000 |
| 2015-07-01 | AMAG | Sale | 2,000 | 69.41 | 138,820 |
| 2015-06-05 | AMAG | Option Ex | 60,000 | 12.99 | 779,400 |
| 2015-06-05 | AMAG | Sale | 66,875 | 69.80 | 4,668,142 |
Table 2. Insider trading of Macrogenics Inc (MGNX) by Heiden William K
| Trade Date | Symbol | Trade Type | Shares | Price ($) | Value ($) |
|---|
| 2025-08-19 | MGNX | Buy | 50,500 | 1.52 | 76,760 |
| 2025-08-20 | MGNX | Buy | 49,500 | 1.49 | 73,755 |
| 2025-05-20 | MGNX | Option Ex | 6,500 | .00 | 0 |
| 2024-05-20 | MGNX | Option Ex | 4,500 | .00 | 0 |
Table 3. Insider trading of Atara Biotherapeutics, Inc. (ATRA) by Heiden William K
| Trade Date | Symbol | Trade Type | Shares | Price ($) | Value ($) |
|---|
| 2023-11-10 | ATRA | Buy | 100,000 | .25 | 25,300 |
Insider trading activities including stock purchases, stock sales, and option exercises
listed in the above table cannot be completely guaranteed as to their accuracy.
For more information regarding the trades made by Heiden William K
(Director of Macrogenics Inc at the time of this reporting) see
the Securities and Exchange Commission (SEC) website.