GeneDx Holdings Corp. (WGS) has 20 known insider and institutional holders on record. The largest holder is MOUNT SINAI HEALTH SYSTEM, INC. with 94,605,473 shares. Other notable holders include Corvex Management LP and Casdin Capital, LLC.
Over the last 12 months, insiders have made 45 transactions in WGS stock — 14 buys (valued at $13.53M) and 16 sells (valued at $3.33M). Insider selling has exceeded buying during this period.
WGS Insider Ownership
Top Holder
MOUNT SINAI HEALTH SYSTEM, INC.
94,605,473 shares
Buys (12 mo)
14
$13.53M value
Sells (12 mo)
16
$3.33M value
12-Month Transaction Activity
Top Insider Holders
| # |
Name |
Role |
Shares Owned |
Last Filed |
Relative Size |
| 1 |
Mount Sinai Health System, Inc. |
Director |
94,605,473 |
2022-05-05 |
|
| 2 |
Corvex Management Lp |
10 Percent Owner |
86,811,516 |
2023-02-09 |
|
| 3 |
Casdin Capital, Llc |
10 Percent Owner |
3,507,164 |
2024-08-05 |
|
| 4 |
Meister Keith A. |
10 Percent Owner |
3,078,315 |
2026-03-05 |
|
| 5 |
Icahn School Of Medicine At Mount Sinai |
10 Percent Owner |
2,846,474 |
2024-11-19 |
|
| 6 |
Opko Health, Inc. |
10 Percent Owner |
2,746,972 |
2024-08-19 |
|
| 7 |
Blackstone Tactical Opportunities Fund - Fd L.p. |
Director |
555,497 |
2022-05-03 |
|
| 8 |
Schadt Eric |
President & Chief R&d Officer |
243,380 |
2022-05-24 |
|
| 9 |
Schwarzman Stephen A |
Director |
162,309 |
2022-05-03 |
|
| 10 |
Ro Isaac |
Former CFO |
110,954 |
2023-05-31 |
|
| 11 |
Stueland Katherine |
Chief Executive Officer |
91,514 |
2026-03-30 |
|
| 12 |
Sherman Rachel E. |
Director |
78,914 |
2022-05-06 |
|
| 13 |
Clark Daniel Emmett |
Officer |
60,087 |
2023-05-04 |
|
| 14 |
Assad Shawn |
Officer |
37,246 |
2023-05-31 |
|
| 15 |
Feeley Kevin |
Chief Financial Officer |
32,500 |
2026-03-30 |
|
| 16 |
Saad Kareem |
Chief Transformation Officer |
31,525 |
2024-03-19 |
|
| 17 |
Coffin James |
President and COO |
29,021 |
2021-12-13 |
|
| 18 |
Miao Richard |
Officer |
25,482 |
2023-04-28 |
|
| 19 |
Ryan Jason |
Director |
15,490 |
2024-11-21 |
|
| 20 |
Prentice Anthony |
Officer |
14,436 |
2023-05-22 |
|
Recent Transactions (last 12 months)
| Date |
Name |
Role |
Type |
Shares |
Price |
Value |
| 2026-03-26 |
Feeley Kevin |
Chief Financial Officer |
Option Exercise (Sell) |
16,250 |
- |
- |
| 2026-03-26 |
Stueland Katherine |
Chief Executive Officer |
Informative Sell |
9,883 |
$65.21 |
$644.51K |
| 2026-03-16 |
Feeley Kevin |
Chief Financial Officer |
Informative Sell |
257 |
$77.94 |
$20.03K |
| 2026-03-15 |
Feeley Kevin |
Chief Financial Officer |
Option Exercise (Sell) |
3,815 |
- |
- |
| 2026-03-16 |
Stueland Katherine |
Chief Executive Officer |
Informative Sell |
772 |
$77.94 |
$60.17K |
| 2026-03-15 |
Stueland Katherine |
Chief Executive Officer |
Option Exercise (Sell) |
11,921 |
- |
- |
| 2026-03-09 |
Feeley Kevin |
Chief Financial Officer |
Option Exercise (Sell) |
2,462 |
- |
- |
| 2026-03-06 |
Feeley Kevin |
Chief Financial Officer |
RSU Award |
1,986 |
$88.11 |
$174.99K |
| 2026-03-06 |
Stueland Katherine |
Chief Executive Officer |
RSU Award |
3,404 |
$88.11 |
$299.93K |
| 2026-03-03 |
Dechairo Bryan |
Chief Operating Officer |
RSU Award |
10,430 |
- |
- |
| 2026-03-04 |
Feeley Kevin |
Chief Financial Officer |
Informative Sell |
2,220 |
$79.25 |
$175.93K |
| 2026-03-03 |
Feeley Kevin |
Chief Financial Officer |
RSU Award |
10,865 |
- |
- |
| 2026-03-04 |
Stueland Katherine |
Chief Executive Officer |
Informative Sell |
9,133 |
$79.25 |
$723.78K |
| 2026-03-03 |
Stueland Katherine |
Chief Executive Officer |
RSU Award |
40,418 |
- |
- |
| 2026-03-05 |
Meister Keith A. |
10 Percent Owner |
Informative Buy |
304 |
$77.96 |
$23.7K |
| 2026-03-03 |
Meister Keith A. |
10 Percent Owner |
Informative Buy |
19,686 |
$70.34 |
$1.38M |
| 2026-02-04 |
Dechairo Bryan |
Chief Operating Officer |
Informative Sell |
100 |
$91.92 |
$9.19K |
| 2026-02-02 |
Dechairo Bryan |
Chief Operating Officer |
Informative Sell |
1,166 |
$100.32 |
$116.97K |
| 2026-02-01 |
Dechairo Bryan |
Chief Operating Officer |
Option Exercise |
9,374 |
- |
- |
| 2026-01-29 |
Feeley Kevin |
Chief Financial Officer |
Option Exercise (Sell) |
754 |
- |
- |
| 2026-01-29 |
Stueland Katherine |
Chief Executive Officer |
Option Exercise (Sell) |
3,874 |
- |
- |
| 2025-12-16 |
Feeley Kevin |
Chief Financial Officer |
Informative Sell |
127 |
$140.45 |
$17.84K |
| 2025-12-16 |
Stueland Katherine |
Chief Executive Officer |
Informative Sell |
74 |
$150.75 |
$11.16K |
| 2025-06-18 |
Leproust Emily M. |
Director |
Option Exercise (Sell) |
12,924 |
- |
- |
| 2025-06-18 |
Ryan Jason |
Director |
Option Exercise (Sell) |
12,924 |
- |
- |
