CRBU
CARIBOU BIO (CRBU)
NASDAQ
$2.04-$0.28 (-12.28%)
Price as of Jun 03, 2026 7:58 PM EDT
  • $234.1M
    Market Cap
  • 120.95%
    1-Year Change
  • Biotechnology
    Industry

Top Holders

Institutional
Mutual Funds
Holder
Ownership %
Shares Held
Change (Shares, %)
Report Date
BLACKROCK INC.
7.01%
6.9M
-57,242 (-0.82%)
Jun 30, 2024
BLACKROCK FUNDING, INC. /DE
6.62%
6.6M
-669,183 (-10.19%)
Dec 31, 2024
PFIZER INC
4.73%
4.7M
0 (0.00%)
Mar 31, 2026
VANGUARD GROUP INC
4.34%
4.3M
+77,272 (+1.80%)
Dec 31, 2025
N/A
3.80%
3.8M
+3.8M (+100.00%)
Mar 31, 2026
RENAISSANCE TECHNOLOGIES LLC
2.61%
2.6M
+950,640 (+36.70%)
Mar 31, 2026
KYNAM CAPITAL MANAGEMENT, LP
2.52%
2.5M
0 (0.00%)
Mar 31, 2026

Current Ownership Distribution

  • Institutions868.0M (80.92%)
  • Mutual Funds200.1M (18.65%)
  • Insiders4.6M (0.43%)
  • Other0 (0.00%)

Insider Transactions

  • 0.43% (4.6M)
    Current InsiderOwnership (%, shares)
  • 0
    Number of InsiderBuying (last 12 months)
  • $0.00
    Amount of InsiderBuying (last 12 months)
  • 3
    Number of InsiderSelling (last 12 months)
  • $1.3M
    Amount of InsiderSelling (last 12 months)
Insider Name & Title
Type
Date
Transaction Value
Shares
Share Price
Shares After Transactions
MCCLUNG BARBARA G
Chief Legal Officer
Sell
Feb 24, 2026
$13,598.48
6,938
$1.96
481,564
Khan Ruhi Ahmad
Chief Business Officer
Sell
Feb 24, 2026
$13,598.48
6,938
$1.96
104,998
Albertson Tina M.
Chief Medical Officer
Sell
Feb 24, 2026
$2,089.36
1,066
$1.96
68,523
JOHNSON DAVID LEE
Award
Feb 20, 2026
$0.00
45,000
$0.00
45,000
Braunstein Scott
Award
Feb 20, 2026
$0.00
45,000
$0.00
45,000
Haurwitz Rachel E.
President and CEO
Award
Feb 20, 2026
$0.00
682,500
$0.00
682,500
Whiting Nancy
Award
Feb 20, 2026
$0.00
45,000
$0.00
45,000
Zheng Ran
Award
Feb 20, 2026
$0.00
45,000
$0.00
45,000
GUGGENHIME ANDREW
Award
Feb 20, 2026
$0.00
45,000
$0.00
45,000
Haurwitz Rachel E.
President and CEO
Award
Feb 20, 2026
$0.00
151,700
$0.00
447,150
Albertson Tina M.
Chief Medical Officer
Award
Feb 20, 2026
$0.00
247,500
$0.00
247,500
Ryali Sriram
Chief Financial Officer
Award
Feb 20, 2026
$0.00
247,500
$0.00
247,500
Khan Ruhi Ahmad
Chief Business Officer
Award
Feb 20, 2026
$0.00
202,500
$0.00
202,500
MCCLUNG BARBARA G
Chief Legal Officer
Award
Feb 20, 2026
$0.00
202,500
$0.00
202,500
Albertson Tina M.
Chief Medical Officer
Award
Feb 20, 2026
$0.00
55,000
$0.00
69,589
Ryali Sriram
Chief Financial Officer
Award
Feb 20, 2026
$0.00
55,000
$0.00
72,360
Khan Ruhi Ahmad
Chief Business Officer
Award
Feb 20, 2026
$0.00
45,000
$0.00
111,936
Richardson-Heron Dara
Award
Feb 20, 2026
$0.00
45,000
$0.00
45,000
Sacks Natalie
Award
Feb 20, 2026
$0.00
45,000
$0.00
45,000
MCCLUNG BARBARA G
Chief Legal Officer
Award
Feb 20, 2026
$0.00
45,000
$0.00
488,502
Haurwitz Rachel E.
President and CEO
Buy
Mar 14, 2025
$20,400.00
20,000
$1.02
3.4M
Ryali Sriram
Chief Financial Officer
Buy
Jan 29, 2025
$24,651.20
17,360
$1.42
17,360
Ryali Sriram
Chief Financial Officer
Award
Jan 10, 2025
$0.00
300,000
$0.00
300,000
Fischesser Ryan
VP of Finance and Controller
Award
Nov 20, 2024
$0.00
25,000
$0.00
118,854