ATOS
ATOSSA THERPTCS (ATOS)
NASDAQ
$2.75+$0.02 (+0.92%)
Price as of Oct 22, 2026 7:36 PM EDT
  • $25.2M
    Market Cap
  • -81.67%
    1-Year Change
  • Biotechnology
    Industry

Top Holders

Institutional
Mutual Funds
Holder
Ownership %
Shares Held
Change (Shares, %)
Report Date
BLACKROCK FUNDING, INC. /DE
97.80%
9.8M
+91,934 (+0.94%)
Dec 31, 2024
BLACKROCK INC.
92.16%
9.2M
+6.4M (+70.09%)
Jun 30, 2024
VANGUARD GROUP INC
61.61%
6.1M
+68,994 (+1.12%)
Dec 31, 2025
TWO SIGMA INVESTMENTS LLC
23.76%
2.4M
+2.3M (+96.18%)
Dec 31, 2021
TWO SIGMA ADVISERS, LLC
16.01%
1.6M
+1.5M (+94.49%)
Dec 31, 2021
VANGUARD CAPITAL MANAGEMENT LLC
3.62%
361,747
+12,651 (+3.50%)
Jun 30, 2026
AMERIPRISE FINANCIAL INC
2.59%
258,234
+3,100 (+1.20%)
Jun 30, 2026

Current Ownership Distribution

  • Institutions405.8M (72.95%)
  • Mutual Funds148.3M (26.66%)
  • Insiders2.2M (0.39%)
  • Other0 (0.00%)

Insider Transactions

  • 0.39% (2.2M)
    Current InsiderOwnership (%, shares)
  • 0
    Number of InsiderBuying (last 12 months)
  • $0.00
    Amount of InsiderBuying (last 12 months)
  • 0
    Number of InsiderSelling (last 12 months)
  • $0.00
    Amount of InsiderSelling (last 12 months)
Insider Name & Title
Type
Date
Transaction Value
Shares
Share Price
Shares After Transactions
QUAY STEVEN C
President & CEO
Award
Mar 27, 2026
$0.00
65,000
$0.00
88,038
Daniel Mark James
Chief Financial Officer
Award
Mar 26, 2026
$0.00
63,000
$0.00
63,000
QUAY STEVEN C
President & CEO
Award
Jan 20, 2026
$572,850.00
950,000
$0.60
950,000
QUAY STEVEN C
President & CEO
Award
Jan 20, 2026
$0.00
325,203
$0.00
339,101
Daniel Mark James
Chief Financial Officer
Award
Oct 14, 2025
$0.00
578,000
$0.00
578,000
QUAY STEVEN C
President & CEO
Buy
May 21, 2025
$9,886.95
11,239
$0.88
13,898
Remmel H. Lawrence
Buy
Mar 26, 2025
$7,000.00
10,000
$0.70
10,257