Halozyme Therapeutics, Inc. (HALO) has 20 known insider and institutional holders on record. The largest holder is KIRK RANDAL J with 2,219,466 shares. Other notable holders include LaBarre Michael J. and MATSUI CONNIE.
Over the last 12 months, insiders have made 37 transactions in HALO stock — 11 buys (valued at $2.07M) and 5 sells (valued at $1.9M). Insider buying has outpaced selling during this period, which may signal confidence in the company's prospects.
HALO Insider Ownership
Top Holder
KIRK RANDAL J
2,219,466 shares
Buys (12 mo)
11
$2.07M value
Sells (12 mo)
5
$1.9M value
12-Month Transaction Activity
Top Insider Holders
| # |
Name |
Role |
Shares Owned |
Last Filed |
Relative Size |
| 1 |
Kirk Randal J |
10 Percent Owner |
2,219,466 |
2018-08-28 |
|
| 2 |
Labarre Michael J. |
SVP, Chief Technical Officer |
185,453 |
2025-02-27 |
|
| 3 |
Matsui Connie |
Director |
183,035 |
2024-12-03 |
|
| 4 |
Kelley Kenneth J |
Director |
179,833 |
2021-04-14 |
|
| 5 |
Torley Helen |
President and CEO |
131,923 |
2026-04-02 |
|
| 6 |
Armour Alison A. |
SVP, Research & Development |
65,920 |
2019-06-04 |
|
| 7 |
Gergen Mark J |
SVP, Chief Operating Officer |
45,568 |
2017-02-24 |
|
| 8 |
Countouriotis Athena |
SVP and Chief Medical Officer |
45,568 |
2017-02-24 |
|
| 9 |
Chondros Dimitrios |
SVP, Chief Medical Officer |
38,584 |
2019-08-05 |
|
| 10 |
Daly James M |
Director |
30,503 |
2023-08-15 |
|
| 11 |
Leonhardt Harry J |
SVP, Gc |
22,784 |
2019-02-22 |
|
| 12 |
Snyder Mark Howard |
SVP, Chief Legal Officer |
15,995 |
2026-02-24 |
|
| 13 |
Labrosse Nicole |
SVP, Chief Financial Officer |
15,995 |
2026-02-24 |
|
| 14 |
Caudill Cortney |
SVP, Chief Operating Officer |
14,366 |
2026-03-10 |
|
| 15 |
Sun Elaine D |
SVP, Chief Financial Officer |
14,018 |
2021-04-01 |
|
| 16 |
Hickey Benjamin |
SVP, Chief Commerical Officer |
13,226 |
2019-10-01 |
|
| 17 |
Stelzer Laurie |
SVP, Chief Financial Officer |
11,392 |
2020-02-24 |
|
| 18 |
Bizzari Jean-pierre |
Director |
11,371 |
2023-05-09 |
|
| 19 |
Ramsay David A |
Interim CFO |
10,000 |
2026-04-02 |
|
| 20 |
Matsuda Masaru |
SVP, General Counsel |
6,883 |
2021-09-07 |
|
Recent Transactions (last 12 months)
| Date |
Name |
Role |
Type |
Shares |
Price |
Value |
| 2026-04-02 |
Torley Helen |
President and CEO |
Option Exercise (Sell) |
20,000 |
$12.07 |
$241.4K |
| 2026-04-01 |
Torley Helen |
President and CEO |
Option Exercise (Sell) |
20,000 |
$12.07 |
$241.4K |
| 2026-04-01 |
Ramsay David A |
Interim CFO |
RSU Award |
10,000 |
- |
- |
| 2026-03-23 |
Ramsay David A |
Officer |
Unknown |
- |
- |
- |
| 2026-03-10 |
Caudill Cortney |
SVP, Chief Operating Officer |
Informative Sell |
8,857 |
$67.64 |
$599.09K |
| 2026-03-09 |
Caudill Cortney |
SVP, Chief Operating Officer |
Informative Sell |
2,100 |
$68.25 |
$143.33K |
| 2026-03-04 |
Torley Helen |
President and CEO |
Option Exercise (Sell) |
10,000 |
$12.07 |
$120.7K |
| 2026-03-03 |
Torley Helen |
President and CEO |
Option Exercise (Sell) |
20,000 |
$12.07 |
$241.4K |
| 2026-03-02 |
Torley Helen |
President and CEO |
Option Exercise (Sell) |
20,000 |
$12.07 |
$241.4K |
| 2026-02-20 |
Caudill Cortney |
SVP, Chief Operating Officer |
Option Exercise (Sell) |
2,666 |
- |
- |
| 2026-02-23 |
Labrosse Nicole |
SVP, Chief Financial Officer |
Option Exercise (Sell) |
6,688 |
- |
- |
| 2026-02-20 |
Labrosse Nicole |
SVP, Chief Financial Officer |
Option Exercise (Sell) |
5,332 |
- |
- |
| 2026-02-23 |
Snyder Mark Howard |
SVP, Chief Legal Officer |
Option Exercise (Sell) |
7,011 |
- |
- |
| 2026-02-20 |
Snyder Mark Howard |
SVP, Chief Legal Officer |
Option Exercise (Sell) |
5,332 |
- |
- |
| 2026-02-23 |
Torley Helen |
President and CEO |
Option Exercise (Sell) |
22,436 |
- |
- |
| 2026-02-20 |
Torley Helen |
President and CEO |
Option Exercise (Sell) |
16,757 |
- |
- |
| 2026-02-16 |
Labrosse Nicole |
SVP, Chief Financial Officer |
Option Exercise (Sell) |
5,093 |
- |
- |
| 2026-02-16 |
Snyder Mark Howard |
SVP, Chief Legal Officer |
Option Exercise (Sell) |
12,016 |
- |
- |
| 2026-02-16 |
Torley Helen |
President and CEO |
Option Exercise (Sell) |
21,009 |
- |
- |
| 2026-02-09 |
Caudill Cortney |
SVP, Chief Operating Officer |
RSU Award |
13,047 |
- |
- |
| 2026-02-09 |
Labrosse Nicole |
SVP, Chief Financial Officer |
RSU Award |
5,167 |
- |
- |
| 2026-02-09 |
Snyder Mark Howard |
SVP, Chief Legal Officer |
RSU Award |
4,651 |
- |
- |
| 2026-02-09 |
Torley Helen |
President and CEO |
RSU Award |
50,013 |
- |
- |
| 2026-02-05 |
Torley Helen |
President and CEO |
Informative Sell |
4,624 |
$78.94 |
$365K |
| 2026-02-04 |
Torley Helen |
President and CEO |
Informative Sell |
10,100 |
$77.54 |
$783.15K |
