CRBU | CARIBOU BIO | Owners

S&P 500$7,656.98
+0.86%
2m
DOW 30$52,573.29
+0.98%
2m
NASDAQ 100$29,368.44
+0.91%
2m
Russell 2000$288.89
+0.41%
2m
Russell 1000$417.91
+0.87%
2m
S&P 400$3,714.14
+0.83%
2m
S&P 600$1,726.18
+0.55%
2m

CARIBOU BIO (CRBU)

NASDAQ

$1.29+$0.02 (+1.57%)

Price as of Sep 11, 2026 7:55 PM EDT

$136.2M
Market Cap
-29.44%
1-Year Change
Biotechnology
Industry

Top Holders

Institutional

Mutual Funds

Holder	Ownership %	Shares Held	Change (Shares, %)	Report Date
BLACKROCK, INC.	7.88%	7.8M	+5.7M (+72.58%)	Jun 30, 2026
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%)	Jun 30, 2026
VANGUARD GROUP INC	4.34%	4.3M	+77,272 (+1.80%)	Dec 31, 2025
VANGUARD CAPITAL MANAGEMENT LLC	4.24%	4.2M	+441,340 (+10.49%)	Jun 30, 2026
MACKENZIE FINANCIAL CORP	3.68%	3.7M	+2.7M (+74.18%)	Jun 30, 2026

Holder	Ownership %	Shares Held	Change (Shares, %)	Report Date
SPDR SERIES TRUST	4.71%	4.7M	0 (0.00%)	Jun 30, 2026
VANGUARD INDEX FUNDS	4.16%	4.1M	+472,688 (+11.45%)	Jun 30, 2026
iSHARES TRUST	4.14%	4.1M	+3.5M (+85.54%)	Jun 30, 2026
Ark ETF Trust	1.50%	1.5M	0 (0.00%)	Apr 30, 2026
ACAP Strategic Fund	1.36%	1.3M	0 (0.00%)	Jun 30, 2026
TEKLA LIFE SCIENCES INVESTORS	1.22%	1.2M	0 (0.00%)	Jun 30, 2026
FIDELITY CONCORD STREET TRUST	0.81%	799,003	+32,448 (+4.06%)	May 31, 2026

Current Ownership Distribution

Institutions917.2M (79.46%)
Mutual Funds232.5M (20.14%)
Insiders4.6M (0.40%)
Other0 (0.00%)

Insider Transactions

0.40% (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
Albertson Tina M. Chief Medical Officer	Sell	Feb 24, 2026	$2,089.36	1,066	$1.96	68,523
Khan Ruhi Ahmad Chief Business Officer	Sell	Feb 24, 2026	$13,598.48	6,938	$1.96	104,998
JOHNSON DAVID LEE	Award	Feb 20, 2026	$0.00	45,000	$0.00	45,000
Richardson-Heron Dara	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
Ryali Sriram Chief Financial Officer	Award	Feb 20, 2026	$0.00	247,500	$0.00	247,500
Zheng Ran	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
Albertson Tina M. Chief Medical 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
Albertson Tina M. Chief Medical Officer	Award	Feb 20, 2026	$0.00	55,000	$0.00	69,589
Braunstein Scott	Award	Feb 20, 2026	$0.00	45,000	$0.00	45,000
Ryali Sriram Chief Financial Officer	Award	Feb 20, 2026	$0.00	55,000	$0.00	72,360
Whiting Nancy	Award	Feb 20, 2026	$0.00	45,000	$0.00	45,000
Khan Ruhi Ahmad Chief Business Officer	Award	Feb 20, 2026	$0.00	45,000	$0.00	111,936
Haurwitz Rachel E. President and CEO	Award	Feb 20, 2026	$0.00	151,700	$0.00	447,150
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	202,500	$0.00	202,500
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