ASMB
ASSEMBLY BIO (ASMB)
NASDAQ
$22.38+$1.02 (+4.80%)
Price as of Nov 11, 2026 7:30 PM EST
  • $434.7M
    Market Cap
  • -35.56%
    1-Year Change
  • Biotechnology
    Industry

Top Holders

Institutional
Mutual Funds
Holder
Ownership %
Shares Held
Change (Shares, %)
Report Date
GILEAD SCIENCES, INC.
24.44%
5.0M
0 (0.00%)
Sep 30, 2026
SATTER MANAGEMENT CO., L.P.
10.94%
2.2M
0 (0.00%)
Jun 30, 2022
CANDRIAM LUXEMBOURG S.C.A.
9.03%
1.8M
+369,375 (+20.09%)
Dec 31, 2021
FARALLON CAPITAL MANAGEMENT LLC
7.88%
1.6M
+377,000 (+23.50%)
Jun 30, 2026
FARALLON CAPITAL MANAGEMENT, L.L.C.
7.88%
1.6M
+377,000 (+23.50%)
Jun 30, 2026
PARADIGM BIOCAPITAL ADVISORS LP
7.63%
1.6M
+888,497 (+57.18%)
Jun 30, 2026
COMMODORE CAPITAL LP
6.95%
1.4M
+415,000 (+29.33%)
Jun 30, 2026

Current Ownership Distribution

  • Institutions211.7M (63.35%)
  • Mutual Funds114.0M (34.12%)
  • Insiders8.4M (2.53%)
  • Other0 (0.00%)

Insider Transactions

  • 2.53% (8.4M)
    Current InsiderOwnership (%, shares)
  • 0
    Number of InsiderBuying (last 12 months)
  • $0.00
    Amount of InsiderBuying (last 12 months)
  • 4
    Number of InsiderSelling (last 12 months)
  • $13.4M
    Amount of InsiderSelling (last 12 months)
Insider Name & Title
Type
Date
Transaction Value
Shares
Share Price
Shares After Transactions
Gaggar Anuj
Chief Medical Officer
Sell
Nov 02, 2026
$50,274.14
2,564
$19.61
53,829
Okazaki Jason A
CEO and President
Sell
Nov 02, 2026
$120,254.02
6,133
$19.61
195,601
Bjorkquist Jeanette M
PFO and PAO
Sell
Nov 02, 2026
$14,078.33
718
$19.61
17,682
White Nicole S
Chief Manufacturing Officer
Sell
Nov 02, 2026
$50,274.14
2,564
$19.61
59,286
Gaggar Anuj
Chief Medical Officer
Sell
Nov 02, 2026
$590.09
29
$20.35
53,800
Okazaki Jason A
CEO and President
Sell
Nov 02, 2026
$1,404.01
69
$20.35
195,532
Bjorkquist Jeanette M
PFO and PAO
Sell
Nov 02, 2026
$183.13
9
$20.35
17,673
White Nicole S
Chief Manufacturing Officer
Sell
Nov 02, 2026
$590.09
29
$20.35
59,257
Gaggar Anuj
Chief Medical Officer
Award
Oct 30, 2026
$0.00
13,705
$0.00
56,393
Okazaki Jason A
CEO and President
Award
Oct 30, 2026
$0.00
38,380
$0.00
201,734
Delaney William E IV
Chief Scientific Officer
Award
Oct 30, 2026
$0.00
13,705
$0.00
74,035
White Nicole S
Chief Manufacturing Officer
Award
Oct 30, 2026
$0.00
13,705
$0.00
61,850
Bjorkquist Jeanette M
PFO and PAO
Award
Oct 30, 2026
$0.00
3,840
$0.00
18,400
Bjorkquist Jeanette M
PFO and PAO
Sell
Mar 30, 2026
$8,314.86
312
$26.65
11,105
Bjorkquist Jeanette M
PFO and PAO
Sell
Mar 30, 2026
$439.84
16
$27.49
11,089
Okazaki Jason A
CEO and President
Award
Mar 29, 2026
$0.00
94,250
$0.00
111,916
Delaney William E IV
Chief Scientific Officer
Award
Mar 29, 2026
$0.00
26,000
$0.00
45,642
Gaggar Anuj
Chief Medical Officer
Award
Mar 29, 2026
$0.00
26,000
$0.00
28,000
Bjorkquist Jeanette M
PFO and PAO
Award
Mar 29, 2026
$0.00
6,500
$0.00
11,417
GILEAD SCIENCES INC
Buy
Aug 08, 2025
$0.00
1.1M
$0.00
1.1M
GILEAD SCIENCES INC
Buy
Aug 08, 2025
$0.00
1.1M
$0.00
1.1M
GILEAD SCIENCES INC
Buy
Aug 08, 2025
$0.00
2.3M
$0.00
4.5M
Bjorkquist Jeanette M
PFO and PAO
Award
Jun 16, 2025
$0.00
600
$0.00
600
Bjorkquist Jeanette M
PFO and PAO
Award
Jun 16, 2025
$0.00
300
$0.00
5,097
ALTIG ANTHONY E
Award
Jun 05, 2025
$0.00
3,500
$0.00
3,500
Houghton Michael
Award
Jun 05, 2025
$0.00
3,500
$0.00
3,500
Johnson-Pratt Lisa
Award
Jun 05, 2025
$0.00
3,500
$0.00
3,500
Consylman Gina
Award
Jun 05, 2025
$0.00
3,500
$0.00
3,500
Mahony Susan
Award
Jun 05, 2025
$0.00
3,500
$0.00
3,500
RINGO WILLIAM R
Award
Jun 05, 2025
$0.00
3,500
$0.00
3,500