Caribou Biosciences, Inc. (CRBU) Insider Ownership

Historic Ownership Trends

Data spanning the past 90 days through December 12, 2025 reveals that Caribou Biosciences's three principal insider shareholders consist of Other Llc Fmr (1.46Mn shares), Chief Legal Officer Barbara G Mcclung (443.50K shares), Chief Scientific Officer Steven Kanner (431.56K shares).

Top Direct Holders

Insider ownership data is derived from the last 60 months of Form 4 SEC filings.
Holder Position Shares Report Date
Llc Fmr 1,464,775 29 Jul, 2021
Barbara G Mcclung Chief Legal Officer 443,502 21 Feb, 2025
Steven Kanner Chief Scientific Officer 431,556 21 Feb, 2025
Rachel E. Haurwitz President And CEO 295,450 17 Mar, 2025
Ryan Fischesser VP Of Finance And Controller 118,854 22 Nov, 2024
Ruhi Ahmad Khan Chief Business Officer 66,936 21 Feb, 2025
Syed Ali-Aamir Rizvi Chief Medical Officer 59,373 20 Jan, 2023
Jason O'Byrne Chief Financial Officer 59,224 22 Feb, 2024
Timothy P Kelly Chief Technology Officer 37,500 21 Feb, 2025
Sriram Ryali Chief Financial Officer 17,360 30 Jan, 2025
Tina M. Albertson Chief Medical Officer 14,589 21 Feb, 2025

* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.

Recent Insider Transactions

Detailed insider trading activity based on Form 4 SEC filings.
Download Data
Transaction Date Insider Name Security Class Transaction Type Shares Traded Price Shares Remaining Ownership Code
14 Mar, 2025 Rachel E. Haurwitz Common Stock A 20,000 $1.02 295,450 D P
20 Feb, 2025 Barbara G Mcclung Common Stock A 37,500 $0.00 447,066 D A
20 Feb, 2025 Timothy P Kelly Common Stock A 37,500 $0.00 37,500 D A
20 Feb, 2025 Steven Kanner Common Stock A 37,500 $0.00 435,120 D A
20 Feb, 2025 Ruhi Ahmad Khan Common Stock A 37,500 $0.00 70,500 D A
20 Feb, 2025 Tina M. Albertson Common Stock A 14,589 $0.00 14,589 D A
20 Feb, 2025 Rachel E. Haurwitz Common Stock A 136,750 $0.00 295,450 D A
21 Feb, 2025 Steven Kanner Common Stock D 3,564 $1.35 431,556 D S
21 Feb, 2025 Ruhi Ahmad Khan Common Stock D 3,564 $1.35 66,936 D S
21 Feb, 2025 Barbara G Mcclung Common Stock D 3,564 $1.35 443,502 D S
29 Jan, 2025 Sriram Ryali Common Stock A 17,360 $1.42 17,360 D P
20 Nov, 2024 Ryan Fischesser - - 118,854 D
20 Nov, 2024 Ryan Fischesser Common Stock A 25,000 $0.00 118,854 D A
20 Feb, 2024 Ruhi Ahmad Khan Common Stock A 33,000 $0.00 33,000 D A
20 Feb, 2024 Steven Kanner Common Stock A 33,000 $0.00 387,037 D A
20 Feb, 2024 Ruhi Ahmad Khan - - 33,000 D
20 Feb, 2024 Jason O'Byrne Common Stock A 33,000 $0.00 59,224 D A
20 Feb, 2024 Barbara G Mcclung Common Stock A 33,000 $0.00 409,566 D A
20 Feb, 2024 Rachel E. Haurwitz Common Stock A 118,700 $0.00 158,700 D A
06 Feb, 2024 Steven Kanner - - 354,037 D