Keson-Brookes Maiken

Chief Legal Officer at Mural Oncology plc · on record since Dec 18, 2023
General Counsel at uniQure N.V. · on record since Jan 31, 2017
CLO & Corp. Secretary at Rubius Therapeutics, Inc. · on record since Nov 20, 2019

Insider trading activity of Keson-Brookes Maiken

Transactions on record: 29; since Feb 21, 2017

Open-market buys: 0

Open-market sells: 8; $560.7K

Companies traded: 3; last filing Dec 5, 2025

Figures computed from official regulatory filings — .

Companies where Keson-Brookes Maiken has traded

Mural Oncology plc16 tx · $36.7K · Dec 5, 2025
Rubius Therapeutics, Inc.11 tx · $716.4K · Feb 1, 2022
uniQure N.V.2 tx · Feb 21, 2017

Track record of Keson-Brookes Maiken

Insufficient history for a statistical track record (fewer than 5 open-market buys).

Transaction history of Keson-Brookes Maiken

Co-insiders of Keson-Brookes Maiken

Cuss Francis MMural Oncology plc +1
Abi-Saab WaliduniQure N.V.
AFEYAN NOUBARRubius Therapeutics, Inc.
ALTSCHULLER SusanMural Oncology plc
Appelhans DannielleRubius Therapeutics, Inc.
Astley-Sparke PhilipuniQure N.V.
Balachandran MadhavanuniQure N.V.
BRADLEY MURRAY D JRRubius Therapeutics, Inc.
Cafico Trust Co LtdMural Oncology plc
CAGNONI PABLO JRubius Therapeutics, Inc.
CALOZ PIERREuniQure N.V.
Cantor Maria EuniQure N.V.
Carmona JoseRubius Therapeutics, Inc.
CARPENTER CHRISTOPHER L.Rubius Therapeutics, Inc.
Coughlin Christina M.Rubius Therapeutics, Inc.
Cutler Adam D.Mural Oncology plc
Dolmetsch RicardouniQure N.V.

This page republishes public regulatory disclosures.

Company	Filed	Type	Qty	Price	Value · USD	Src
Mural Oncology plcListing unverified	Dec 5, 2025	Other	-68,834	—	n/a (No price was disclosed in the filing)	SEC
Mural Oncology plcListing unverified	Dec 5, 2025	OtherD (derivative)	-31,200	—	n/a (No price was disclosed in the filing)	SEC
Mural Oncology plcListing unverified	Dec 5, 2025	OtherD (derivative)	-65,000	—	n/a (No price was disclosed in the filing)	SEC
Mural Oncology plcListing unverified	Dec 5, 2025	OtherD (derivative)	-54,242	—	n/a (No price was disclosed in the filing)	SEC
Mural Oncology plcListing unverified	Jul 23, 2025	Sell	-2,572	2.48 USD	$6.4K	SEC
Mural Oncology plcListing unverified	Jul 22, 2025	Sell	-2,158	2.48 USD	$5.4K	SEC
Mural Oncology plcListing unverified	Mar 5, 2025	AwardD (derivative)	65,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
Mural Oncology plcListing unverified	Mar 5, 2025	Award	35,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
Mural Oncology plcListing unverified	Mar 5, 2025	Sell	-1,469	3.45 USD	$5.1K	SEC
Mural Oncology plcListing unverified	Mar 5, 2025	Sell	-1,262	3.36 USD	$4.2K	SEC
Mural Oncology plcListing unverified	Dec 26, 2024	Sell	-2,555	3.27 USD	$8.4K	SEC
Mural Oncology plcListing unverified	Jul 18, 2024	Sell	-2,157	3.41 USD	$7.4K	SEC
Mural Oncology plcListing unverified	Mar 4, 2024	AwardD (derivative)	31,200	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
Mural Oncology plcListing unverified	Mar 4, 2024	Award	16,800	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
Mural Oncology plcListing unverified	Dec 18, 2023	Award	29,207	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
Mural Oncology plcListing unverified	Dec 18, 2023	AwardD (derivative)	54,242	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
Rubius Therapeutics, Inc.Listing unverified	Feb 1, 2022	AwardD (derivative)	34,500	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
Rubius Therapeutics, Inc.Listing unverified	Feb 1, 2022	AwardD (derivative)	143,750	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
Rubius Therapeutics, Inc.Listing unverified	Feb 1, 2022	Exercise	8,075	—	n/a (No price was disclosed in the filing)	SEC
Rubius Therapeutics, Inc.Listing unverified	Feb 1, 2022	ExerciseD (derivative)	-8,075	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
Rubius Therapeutics, Inc.Listing unverified	Feb 1, 2022	Sell	-2,732	6.57 USD	$17.9K	SEC
Rubius Therapeutics, Inc.Listing unverified	Mar 15, 2021	Sell	-25,000	20.24 USD	$506K	SEC
Rubius Therapeutics, Inc.Listing unverified	Mar 15, 2021	Exercise	25,000	7.70 USD	$192.5K	SEC
Rubius Therapeutics, Inc.Listing unverified	Mar 15, 2021	ExerciseD (derivative)	-25,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
Rubius Therapeutics, Inc.Listing unverified	Feb 2, 2021	AwardD (derivative)	142,500	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC

Company	Filed	Type	Qty	Price	Value · USD	Src
Mural Oncology plcListing unverified	Dec 5, 2025	Other	-68,834	—	n/a (No price was disclosed in the filing)	SEC
Mural Oncology plcListing unverified	Dec 5, 2025	OtherD (derivative)	-31,200	—	n/a (No price was disclosed in the filing)	SEC
Mural Oncology plcListing unverified	Dec 5, 2025	OtherD (derivative)	-65,000	—	n/a (No price was disclosed in the filing)	SEC
Mural Oncology plcListing unverified	Dec 5, 2025	OtherD (derivative)	-54,242	—	n/a (No price was disclosed in the filing)	SEC
Mural Oncology plcListing unverified	Jul 23, 2025	Sell	-2,572	2.48 USD	$6.4K	SEC
Mural Oncology plcListing unverified	Jul 22, 2025	Sell	-2,158	2.48 USD	$5.4K	SEC
Mural Oncology plcListing unverified	Mar 5, 2025	AwardD (derivative)	65,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
Mural Oncology plcListing unverified	Mar 5, 2025	Award	35,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
Mural Oncology plcListing unverified	Mar 5, 2025	Sell	-1,469	3.45 USD	$5.1K	SEC
Mural Oncology plcListing unverified	Mar 5, 2025	Sell	-1,262	3.36 USD	$4.2K	SEC
Mural Oncology plcListing unverified	Dec 26, 2024	Sell	-2,555	3.27 USD	$8.4K	SEC
Mural Oncology plcListing unverified	Jul 18, 2024	Sell	-2,157	3.41 USD	$7.4K	SEC
Mural Oncology plcListing unverified	Mar 4, 2024	AwardD (derivative)	31,200	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
Mural Oncology plcListing unverified	Mar 4, 2024	Award	16,800	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
Mural Oncology plcListing unverified	Dec 18, 2023	Award	29,207	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
Mural Oncology plcListing unverified	Dec 18, 2023	AwardD (derivative)	54,242	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
Rubius Therapeutics, Inc.Listing unverified	Feb 1, 2022	AwardD (derivative)	34,500	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
Rubius Therapeutics, Inc.Listing unverified	Feb 1, 2022	AwardD (derivative)	143,750	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
Rubius Therapeutics, Inc.Listing unverified	Feb 1, 2022	Exercise	8,075	—	n/a (No price was disclosed in the filing)	SEC
Rubius Therapeutics, Inc.Listing unverified	Feb 1, 2022	ExerciseD (derivative)	-8,075	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
Rubius Therapeutics, Inc.Listing unverified	Feb 1, 2022	Sell	-2,732	6.57 USD	$17.9K	SEC
Rubius Therapeutics, Inc.Listing unverified	Mar 15, 2021	Sell	-25,000	20.24 USD	$506K	SEC
Rubius Therapeutics, Inc.Listing unverified	Mar 15, 2021	Exercise	25,000	7.70 USD	$192.5K	SEC
Rubius Therapeutics, Inc.Listing unverified	Mar 15, 2021	ExerciseD (derivative)	-25,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
Rubius Therapeutics, Inc.Listing unverified	Feb 2, 2021	AwardD (derivative)	142,500	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC