York Charles N II

USNatural personCFO

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Insider

York Charles N II

USNatural personCFO

Transactions

164

Issuers

Buys / Sells

6/32

Last tx

23 Apr 2026

Current positions

Holdings derived from the most recent reported transactions. Not adjusted for stock splits or share-class conversions.

Issuer	Shares	Source	Last tx	Detail
Spyre Therapeutics, Inc.	126,000	reported	14 Feb 2020	tx 17+548,043−12,884
Day One Biopharmaceuticals, Inc.	0	reported	23 Apr 2026	tx 147+2,415,542−3,258,135

Recent transactions

Date	Type	Issuer	Qty	Price	Signals
23 Apr 2026	OTHER	Day One Biopharmaceuticals, Inc.	312,025	—
23 Apr 2026	OTHER	Day One Biopharmaceuticals, Inc.	497,667	—	deriv
23 Apr 2026	OTHER	Day One Biopharmaceuticals, Inc.	151,000	—	deriv
23 Apr 2026	OTHER	Day One Biopharmaceuticals, Inc.	116,000	—	deriv
23 Apr 2026	OTHER	Day One Biopharmaceuticals, Inc.	162,000	—	deriv
23 Apr 2026	OTHER	Day One Biopharmaceuticals, Inc.	162,000	—	deriv
23 Apr 2026	OTHER	Day One Biopharmaceuticals, Inc.	188,000	—	deriv
23 Apr 2026	OTHER	Day One Biopharmaceuticals, Inc.	6,750	—	deriv
23 Apr 2026	OTHER	Day One Biopharmaceuticals, Inc.	46,375	—	deriv
23 Apr 2026	OTHER	Day One Biopharmaceuticals, Inc.	72,875	—	deriv
23 Apr 2026	OTHER	Day One Biopharmaceuticals, Inc.	118,125	—	deriv
17 Feb 2026	SALE	Day One Biopharmaceuticals, Inc.	6,065	11.60 USD
15 Feb 2026	EXERCISE	Day One Biopharmaceuticals, Inc.	2,250	—
15 Feb 2026	EXERCISE	Day One Biopharmaceuticals, Inc.	6,625	—
15 Feb 2026	EXERCISE	Day One Biopharmaceuticals, Inc.	6,625	—
15 Feb 2026	EXERCISE	Day One Biopharmaceuticals, Inc.	7,875	—
15 Feb 2026	EXERCISE	Day One Biopharmaceuticals, Inc.	6,625	0.00 USD	deriv
15 Feb 2026	EXERCISE	Day One Biopharmaceuticals, Inc.	7,875	0.00 USD	deriv
15 Feb 2026	EXERCISE	Day One Biopharmaceuticals, Inc.	2,250	0.00 USD	deriv
15 Feb 2026	EXERCISE	Day One Biopharmaceuticals, Inc.	6,625	0.00 USD	deriv
30 Jan 2026	GRANT_AWARD	Day One Biopharmaceuticals, Inc.	188,000	0.00 USD	deriv
30 Jan 2026	GRANT_AWARD	Day One Biopharmaceuticals, Inc.	126,000	0.00 USD	deriv
15 Nov 2025	EXERCISE	Day One Biopharmaceuticals, Inc.	1,375	—
15 Nov 2025	EXERCISE	Day One Biopharmaceuticals, Inc.	6,625	—
15 Nov 2025	EXERCISE	Day One Biopharmaceuticals, Inc.	2,250	—

Current positions

Holdings derived from the most recent reported transactions. Not adjusted for stock splits or share-class conversions.

Issuer	Shares	Source	Last tx	Detail
Spyre Therapeutics, Inc.	126,000	reported	14 Feb 2020	tx 17+548,043−12,884
Day One Biopharmaceuticals, Inc.	0	reported	23 Apr 2026	tx 147+2,415,542−3,258,135

Recent transactions

Date	Type	Issuer	Qty	Price	Signals
23 Apr 2026	OTHER	Day One Biopharmaceuticals, Inc.	312,025	—
23 Apr 2026	OTHER	Day One Biopharmaceuticals, Inc.	497,667	—	deriv
23 Apr 2026	OTHER	Day One Biopharmaceuticals, Inc.	151,000	—	deriv
23 Apr 2026	OTHER	Day One Biopharmaceuticals, Inc.	116,000	—	deriv
23 Apr 2026	OTHER	Day One Biopharmaceuticals, Inc.	162,000	—	deriv
23 Apr 2026	OTHER	Day One Biopharmaceuticals, Inc.	162,000	—	deriv
23 Apr 2026	OTHER	Day One Biopharmaceuticals, Inc.	188,000	—	deriv
23 Apr 2026	OTHER	Day One Biopharmaceuticals, Inc.	6,750	—	deriv
23 Apr 2026	OTHER	Day One Biopharmaceuticals, Inc.	46,375	—	deriv
23 Apr 2026	OTHER	Day One Biopharmaceuticals, Inc.	72,875	—	deriv
23 Apr 2026	OTHER	Day One Biopharmaceuticals, Inc.	118,125	—	deriv
17 Feb 2026	SALE	Day One Biopharmaceuticals, Inc.	6,065	11.60 USD
15 Feb 2026	EXERCISE	Day One Biopharmaceuticals, Inc.	2,250	—
15 Feb 2026	EXERCISE	Day One Biopharmaceuticals, Inc.	6,625	—
15 Feb 2026	EXERCISE	Day One Biopharmaceuticals, Inc.	6,625	—
15 Feb 2026	EXERCISE	Day One Biopharmaceuticals, Inc.	7,875	—
15 Feb 2026	EXERCISE	Day One Biopharmaceuticals, Inc.	6,625	0.00 USD	deriv
15 Feb 2026	EXERCISE	Day One Biopharmaceuticals, Inc.	7,875	0.00 USD	deriv
15 Feb 2026	EXERCISE	Day One Biopharmaceuticals, Inc.	2,250	0.00 USD	deriv
15 Feb 2026	EXERCISE	Day One Biopharmaceuticals, Inc.	6,625	0.00 USD	deriv
30 Jan 2026	GRANT_AWARD	Day One Biopharmaceuticals, Inc.	188,000	0.00 USD	deriv
30 Jan 2026	GRANT_AWARD	Day One Biopharmaceuticals, Inc.	126,000	0.00 USD	deriv
15 Nov 2025	EXERCISE	Day One Biopharmaceuticals, Inc.	1,375	—
15 Nov 2025	EXERCISE	Day One Biopharmaceuticals, Inc.	6,625	—
15 Nov 2025	EXERCISE	Day One Biopharmaceuticals, Inc.	2,250	—