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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

2
Insider
Date
Role
Action
Shares
Price
Amount
Fischesser Ryan
6 Oct 2022
VP of Finance and Controller
Sold after exercise
10,000
$10.80
$107.96K
Kanner Steven
25 Aug 2022
Chief Scientific Officer
Sold after exercise
43,248
$11.22
$485.22K
Show all 41 transactions →

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