Atossa Therapeutics, Inc. (ATOS) has 18 known insider and institutional holders on record. The largest holder is Guse Kyle with 557,900 shares. Other notable holders include Rees Heather and Chen Ben R.
Over the last 12 months, insiders have made 15 transactions in ATOS stock — 14 buys (valued at $3.24M) and 0 sells (valued at RSU Award). Insider buying has outpaced selling during this period, which may signal confidence in the company's prospects.
ATOS Insider Ownership
Top Holder
Guse Kyle
557,900 shares
Buys (12 mo)
14
$3.24M value
Sells (12 mo)
0
$0.00 value
12-Month Transaction Activity
Top Insider Holders
| # |
Name |
Role |
Shares Owned |
Last Filed |
Relative Size |
| 1 |
Guse Kyle |
CFO, Gen Counsel and Secretary |
557,900 |
2023-03-06 |
|
| 2 |
Rees Heather |
Chief Financial Officer |
543,785 |
2025-05-16 |
|
| 3 |
Chen Ben R |
Sr. VP of Glob. Reg. Affairs |
300,000 |
2014-04-03 |
|
| 4 |
Youmans Scott |
Chief Operating Officer |
286,217 |
2015-09-03 |
|
| 5 |
Galli Stephen J |
Director |
125,000 |
2025-05-16 |
|
| 6 |
Chen Shu-chih |
Director |
125,000 |
2025-05-16 |
|
| 7 |
Finn Jonathan |
Director |
125,000 |
2025-05-16 |
|
| 8 |
Remmel H. Lawrence |
Director |
125,000 |
2025-05-16 |
|
| 9 |
Steinhart Richard I |
Director |
125,000 |
2025-05-16 |
|
| 10 |
Cigler Tessa |
Director |
125,000 |
2025-05-16 |
|
| 11 |
Cross Alexander D |
Director |
88,866 |
2013-06-27 |
|
| 12 |
Quay Steven C |
President & CEO |
88,038 |
2026-03-31 |
|
| 13 |
Daniel Mark James |
Chief Financial Officer |
63,000 |
2026-03-30 |
|
| 14 |
Sawyer John E |
See Remarks |
59,265 |
2015-03-18 |
|
| 15 |
Destro Christopher S. |
SVP, Sales and Marketing |
54,625 |
2015-03-18 |
|
| 16 |
Carbonaro Peter J. |
Sr. Vice President, Operations |
45,000 |
2014-05-08 |
|
| 17 |
Barnhart John |
Director |
44,882 |
2013-05-09 |
|
| 18 |
Weaver Gregory L |
Former EVP, CFO, & Director |
55 |
2023-11-17 |
|
Recent Transactions (last 12 months)
| Date |
Name |
Role |
Type |
Shares |
Price |
Value |
| 2026-03-27 |
Quay Steven C |
President & CEO |
RSU Award |
65,000 |
- |
- |
| 2026-03-26 |
Daniel Mark James |
Chief Financial Officer |
RSU Award |
63,000 |
- |
- |
| 2026-01-20 |
Quay Steven C |
President & CEO |
RSU Award |
331,674 |
- |
- |
| 2026-01-20 |
Quay Steven C |
President & CEO |
RSU Award |
325,203 |
- |
- |
| 2025-10-14 |
Daniel Mark James |
Chief Financial Officer |
RSU Award |
578,000 |
$1.03 |
$595.34K |
| 2025-10-14 |
Daniel Mark James |
Officer |
Unknown |
- |
- |
- |
| 2025-05-21 |
Quay Steven C |
President & CEO |
Informative Buy |
11,239 |
$0.88 |
$9.89K |
| 2025-05-15 |
Cigler Tessa |
Director |
RSU Award |
125,000 |
$0.99 |
$123.75K |
| 2025-05-15 |
Rees Heather |
Chief Financial Officer |
RSU Award |
543,785 |
$0.99 |
$538.35K |
| 2025-05-15 |
Finn Jonathan |
Director |
RSU Award |
125,000 |
$0.99 |
$123.75K |
| 2025-05-15 |
Chen Shu-chih |
Director |
RSU Award |
125,000 |
$0.99 |
$123.75K |
| 2025-05-15 |
Galli Stephen J |
Director |
RSU Award |
125,000 |
$0.99 |
$123.75K |
| 2025-05-15 |
Remmel H. Lawrence |
Director |
RSU Award |
125,000 |
$0.99 |
$123.75K |
| 2025-05-15 |
Steinhart Richard I |
Director |
RSU Award |
125,000 |
$0.99 |
$123.75K |
| 2025-05-15 |
Quay Steven C |
President & CEO |
RSU Award |
1,366,062 |
$0.99 |
$1.35M |
