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Caribou Biosciences, Inc.

CRBU Net buying
CIK 0001619856 #4029 in the set updated 17 Sep 2026
Bought (120 mo)
$344.39K
out of their own pocket, the only kind of buying there is
Sold (120 mo)
$690.59K
$2.09K on a plan · $593.18K straight out of an exercise
Sold at will
$95.33K
8 of 11 sales
Net
−$346.20K
+$249.07K against sales at will

By person

11 insiders · 41 transactions
Insider
Role
Bought
Sold
Net
Holding
Of company
Worth
Change
Kanner Steven
Chief Scientific Officer
$220.76K (3)
$490.03K (2) scheduled
−$269.28K
431,556
0.4025%
$832.90K
+283.1%
Fischesser Ryan
VP of Finance and Controller
$37.31K (4)
$107.96K (1) scheduled
−$70.65K
118,854
0.1109%
$229.39K
+51.4%
Rizvi Syed Ali-aamir
Chief Medical Officer
—
$35.51K (1)
−$35.51K
59,373
0.0554%
$114.59K
+1,087%
Ryali Sriram
Chief Financial Officer
$24.65K (1)
—
+$24.65K
72,360
0.0675%
$139.65K
—
MCCLUNG BARBARA G
Chief Legal Officer
$41.28K (4)
$18.41K (2)
+$22.87K
481,564
0.4492%
$929.42K
+44.3%
Haurwitz Rachel E.
President and CEO
$20.40K (1)
—
+$20.40K
3,816,545
3.56%
$7.37M
+13.9%
Khan Ruhi Ahmad
Chief Business Officer
—
$18.41K (2)
−$18.41K
104,998
0.0979%
$202.65K
—
Kelly Timothy P
Chief Technology Officer
—
$18.19K (2)
−$18.19K
73,125
0.0682%
$141.13K
—
Albertson Tina M.
Chief Medical Officer
—
$2.09K (1) scheduled
−$2.09K
68,523
0.0639%
$132.25K
—
FMR LLC entity
See Remark 1
—
—
—
3,323,284
3.10%
$6.41M
—
O'Byrne Jason
Chief Financial Officer
—
—
—
59,224
0.0552%
$114.30K
+3,037%

Individual transactions

41
Insider
Date
Role
Action
Shares
Price
Amount
Kelly Timothy P
25 Feb 2026
Chief Technology Officer
Sell
6,228
$1.93
$12.02K
Albertson Tina M.
24 Feb 2026
Chief Medical Officer
Sold on a plan
1,066
$1.96
$2.09K
Khan Ruhi Ahmad
24 Feb 2026
Chief Business Officer
Sell
6,938
$1.96
$13.60K
MCCLUNG BARBARA G
24 Feb 2026
Chief Legal Officer
Sell
6,938
$1.96
$13.60K
Kelly Timothy P
24 Feb 2026
Chief Technology Officer
Sell
3,147
$1.96
$6.17K
Haurwitz Rachel E.
14 Mar 2025
President and CEO
Buy indirect
20,000
$1.02
$20.40K
Kanner Steven
21 Feb 2025
Chief Scientific Officer
Sell
3,564
$1.35
$4.81K
Khan Ruhi Ahmad
21 Feb 2025
Chief Business Officer
Sell
3,564
$1.35
$4.81K
MCCLUNG BARBARA G
21 Feb 2025
Chief Legal Officer
Sell
3,564
$1.35
$4.81K
Ryali Sriram
29 Jan 2025
Chief Financial Officer
Buy
17,360
$1.42
$24.65K
Kanner Steven
6 Feb 2024
Chief Scientific Officer
Exercised, kept
30,577
$2.69
$82.25K
Haurwitz Rachel E.
8 Jun 2023
President and CEO
Exercised, kept
10,000
$2.96
$29.60K
Haurwitz Rachel E.
20 Mar 2023
President and CEO
Exercised, kept
10,000
$2.96
$29.60K
Rizvi Syed Ali-aamir
19 Jan 2023
Chief Medical Officer
Sell
5,627
$6.31
$35.51K
Kanner Steven
2 Dec 2022
Chief Scientific Officer
Exercised, kept
21,401
$2.69
$57.57K
Fischesser Ryan
6 Oct 2022
VP of Finance and Controller
Sold after exercise
10,000
$10.80
$107.96K
MCCLUNG BARBARA G
15 Sep 2022
Chief Legal Officer
Exercised, kept
27,518
$2.69
$74.02K
MCCLUNG BARBARA G
15 Sep 2022
Chief Legal Officer
Exercised, kept
77
$2.69
$207.13
Kanner Steven
25 Aug 2022
Chief Scientific Officer
Sold after exercise
43,248
$11.22
$485.22K
Kanner Steven
13 May 2022
Chief Scientific Officer
Exercised, kept
6,114
$2.69
$16.45K
Kanner Steven
13 May 2022
Chief Scientific Officer
Exercised, kept
68,306
$1.81
$123.63K
Haurwitz Rachel E.
9 May 2022
President and CEO
Exercised, kept
10,000
$2.96
$29.60K
Fischesser Ryan
5 May 2022
VP of Finance and Controller
Exercised, kept
1,138
$4.11
$4.68K
Fischesser Ryan
5 May 2022
VP of Finance and Controller
Exercised, kept
1,136
$2.69
$3.06K
Fischesser Ryan
15 Mar 2022
VP of Finance and Controller
Exercised, kept
1,138
$4.11
$4.68K
Fischesser Ryan
15 Mar 2022
VP of Finance and Controller
Exercised, kept
1,136
$2.69
$3.06K
Kanner Steven
4 Mar 2022
Chief Scientific Officer
Exercised, kept
1,549
$4.11
$6.37K
Kanner Steven
4 Mar 2022
Chief Scientific Officer
Exercised, kept
9,171
$2.69
$24.67K
O'Byrne Jason
8 Feb 2022
Chief Financial Officer
Exercised, kept
24,336
$4.11
$100.02K
Haurwitz Rachel E.
26 Jan 2022
President and CEO
Exercised, kept
10,000
$2.96
$29.60K
Fischesser Ryan
11 Jan 2022
VP of Finance and Controller
Buy
6,818
$4.11
$28.02K
Fischesser Ryan
11 Jan 2022
VP of Finance and Controller
Buy
569
$2.69
$1.53K
Fischesser Ryan
20 Dec 2021
VP of Finance and Controller
Buy
1,136
$2.69
$3.06K
MCCLUNG BARBARA G
7 Dec 2021
Chief Legal Officer
Buy
6,115
$2.69
$16.45K
MCCLUNG BARBARA G
7 Dec 2021
Chief Legal Officer
Buy
12
$2.69
$32.28
MCCLUNG BARBARA G
20 Oct 2021
Chief Legal Officer
Buy
43
$2.69
$115.67
MCCLUNG BARBARA G
20 Oct 2021
Chief Legal Officer
Buy
9,176
$2.69
$24.68K
Kanner Steven
12 Oct 2021
Chief Scientific Officer
Buy
14,614
$2.69
$39.31K
Kanner Steven
12 Oct 2021
Chief Scientific Officer
Buy
698
$1.81
$1.26K
Kanner Steven
12 Oct 2021
Chief Scientific Officer
Buy
99,548
$1.81
$180.18K
Fischesser Ryan
11 Oct 2021
VP of Finance and Controller
Buy
1,746
$2.69
$4.70K

What was left out

Form 4 filings counted 97
Amendments (4/A) skipped 2
Filings about a different issuer 2
Unreadable filings 0
Joint filings 0
Sales on a Rule 10b5-1 plan 1
Sales straight out of an exercise 2
Sales at will 8
Transactions with no price 0
Shares from compensation/vesting 4,644,394
Sales filed before the plan box existed 1
History held since 13 Sep 2017