Insider · CIK 0001655962

York Charles N II

Reports to the SEC for 2 companies · BRISBANE, CA

sec.gov

Transactions

Companies

Filings

CIK

0001655962

Forms 4 and 5

Insider transactions

50 trades

Date	Company	Role	Code	Shares	Price	Value	Shares after
2026-04-23	DAWNDay One Biopharmaceuticals, Inc.D Disposition to Issuer	COO and CFO	DDisposition to Issuer	−312K sh	—	—	0
2026-04-23	DAWNDay One Biopharmaceuticals, Inc. · Stock Option (right to buy Common Stock)D Disposition to Issuer	COO and CFO	DDisposition to Issuer	−498K sh	—	—	0
2026-04-23	DAWNDay One Biopharmaceuticals, Inc. · Stock Option (right to buy Common Stock)D Disposition to Issuer	COO and CFO	DDisposition to Issuer	−151K sh	—	—	0
2026-04-23	DAWNDay One Biopharmaceuticals, Inc. · Stock Option (right to buy Common Stock)D Disposition to Issuer	COO and CFO	DDisposition to Issuer	−116K sh	—	—	0
2026-04-23	DAWNDay One Biopharmaceuticals, Inc. · Stock Option (right to buy Common Stock)D Disposition to Issuer	COO and CFO	DDisposition to Issuer	−162K sh	—	—	0
2026-04-23	DAWNDay One Biopharmaceuticals, Inc. · Stock Option (right to buy Common Stock)D Disposition to Issuer	COO and CFO	DDisposition to Issuer	−162K sh	—	—	0
2026-04-23	DAWNDay One Biopharmaceuticals, Inc. · Stock Option (right to buy Common Stock)D Disposition to Issuer	COO and CFO	DDisposition to Issuer	−188K sh	—	—	0
2026-04-23	DAWNDay One Biopharmaceuticals, Inc. · Restricted Stock Unit (RSU)D Disposition to Issuer	COO and CFO	DDisposition to Issuer	−6,750 sh	—	—	0
2026-04-23	DAWNDay One Biopharmaceuticals, Inc. · Restricted Stock Unit (RSU)D Disposition to Issuer	COO and CFO	DDisposition to Issuer	−46.4K sh	—	—	0
2026-04-23	DAWNDay One Biopharmaceuticals, Inc. · Restricted Stock Unit (RSU)D Disposition to Issuer	COO and CFO	DDisposition to Issuer	−72.9K sh	—	—	0
2026-04-23	DAWNDay One Biopharmaceuticals, Inc. · Restricted Stock Unit (RSU)D Disposition to Issuer	COO and CFO	DDisposition to Issuer	−118K sh	—	—	0
2026-02-17	DAWNDay One Biopharmaceuticals, Inc.S Sale	COO and CFO	SSale	−6,065 sh	$11.60	−$70.4K	312,025
2026-02-15	DAWNDay One Biopharmaceuticals, Inc.M Exercise/Conversion	COO and CFO	MExercise/Conversion	+2,250 sh	—	—	296,965
2026-02-15	DAWNDay One Biopharmaceuticals, Inc.M Exercise/Conversion	COO and CFO	MExercise/Conversion	+6,625 sh	—	—	303,590
2026-02-15	DAWNDay One Biopharmaceuticals, Inc.M Exercise/Conversion	COO and CFO	MExercise/Conversion	+6,625 sh	—	—	310,215
2026-02-15	DAWNDay One Biopharmaceuticals, Inc.M Exercise/Conversion	COO and CFO	MExercise/Conversion	+7,875 sh	—	—	318,090
2026-02-15	DAWNDay One Biopharmaceuticals, Inc. · Restricted Stock Unit (RSU)M Exercise/Conversion	COO and CFO	MExercise/Conversion	−2,250 sh	—	—	6,750
2026-02-15	DAWNDay One Biopharmaceuticals, Inc. · Restricted Stock Unit (RSU)M Exercise/Conversion	COO and CFO	MExercise/Conversion	−6,625 sh	—	—	46,375
2026-02-15	DAWNDay One Biopharmaceuticals, Inc. · Restricted Stock Unit (RSU)M Exercise/Conversion	COO and CFO	MExercise/Conversion	−6,625 sh	—	—	72,875
2026-02-15	DAWNDay One Biopharmaceuticals, Inc. · Restricted Stock Unit (RSU)M Exercise/Conversion	COO and CFO	MExercise/Conversion	−7,875 sh	—	—	118,125
2026-01-30	DAWNDay One Biopharmaceuticals, Inc. · Stock Option (right to buy Common Stock)A Award	COO and CFO	AAward	+188K sh	—	—	188,000
2026-01-30	DAWNDay One Biopharmaceuticals, Inc. · Restricted Stock UnitsA Award	COO and CFO	AAward	+126K sh	—	—	126,000
2025-11-17	DAWNDay One Biopharmaceuticals, Inc.S Sale	COO and CFO	SSale	−4,062 sh	$8.91	−$36.2K	294,715
2025-11-15	DAWNDay One Biopharmaceuticals, Inc.M Exercise/Conversion	COO and CFO	MExercise/Conversion	+1,375 sh	—	—	283,277
2025-11-15	DAWNDay One Biopharmaceuticals, Inc.M Exercise/Conversion	COO and CFO	MExercise/Conversion	+2,250 sh	—	—	285,527
2025-11-15	DAWNDay One Biopharmaceuticals, Inc.M Exercise/Conversion	COO and CFO	MExercise/Conversion	+6,625 sh	—	—	292,152
2025-11-15	DAWNDay One Biopharmaceuticals, Inc.M Exercise/Conversion	COO and CFO	MExercise/Conversion	+6,625 sh	—	—	298,777
2025-11-15	DAWNDay One Biopharmaceuticals, Inc. · Restricted Stock Unit (RSU)M Exercise/Conversion	COO and CFO	MExercise/Conversion	−1,375 sh	—	—	0
2025-11-15	DAWNDay One Biopharmaceuticals, Inc. · Restricted Stock Unit (RSU)M Exercise/Conversion	COO and CFO	MExercise/Conversion	−2,250 sh	—	—	9,000
2025-11-15	DAWNDay One Biopharmaceuticals, Inc. · Restricted Stock Unit (RSU)M Exercise/Conversion	COO and CFO	MExercise/Conversion	−6,625 sh	—	—	53,000
2025-11-15	DAWNDay One Biopharmaceuticals, Inc. · Restricted Stock Unit (RSU)M Exercise/Conversion	COO and CFO	MExercise/Conversion	−6,625 sh	—	—	79,500
2025-11-06	DAWNDay One Biopharmaceuticals, Inc. · Stock Option (right to buy Common Stock)D Disposition to Issuer	COO and CFO	DDisposition to Issuer	−498K sh	—	—	0
2025-11-06	DAWNDay One Biopharmaceuticals, Inc. · Stock Option (right to buy Common Stock)A Award	COO and CFO	AAward	+498K sh	—	—	497,667
2025-11-06	DAWNDay One Biopharmaceuticals, Inc. · Stock Option (right to buy Common Stock)D Disposition to Issuer	COO and CFO	DDisposition to Issuer	−151K sh	—	—	0
2025-11-06	DAWNDay One Biopharmaceuticals, Inc. · Stock Option (right to buy Common Stock)A Award	COO and CFO	AAward	+151K sh	—	—	151,000
2025-11-06	DAWNDay One Biopharmaceuticals, Inc. · Stock Option (right to buy Common Stock)D Disposition to Issuer	COO and CFO	DDisposition to Issuer	−116K sh	—	—	0
2025-11-06	DAWNDay One Biopharmaceuticals, Inc. · Stock Option (right to buy Common Stock)A Award	COO and CFO	AAward	+116K sh	—	—	116,000
2025-11-06	DAWNDay One Biopharmaceuticals, Inc. · Stock Option (right to buy Common Stock)D Disposition to Issuer	COO and CFO	DDisposition to Issuer	−162K sh	—	—	0
2025-11-06	DAWNDay One Biopharmaceuticals, Inc. · Stock Option (right to buy Common Stock)A Award	COO and CFO	AAward	+162K sh	—	—	162,000
2025-11-06	DAWNDay One Biopharmaceuticals, Inc. · Stock Option (right to buy Common Stock)D Disposition to Issuer	COO and CFO	DDisposition to Issuer	−162K sh	—	—	0
2025-11-06	DAWNDay One Biopharmaceuticals, Inc. · Stock Option (right to buy Common Stock)A Award	COO and CFO	AAward	+162K sh	—	—	162,000
2025-08-18	DAWNDay One Biopharmaceuticals, Inc.S Sale	COO and CFO	SSale	−4,106 sh	$6.77	−$27.8K	278,000
2025-08-15	DAWNDay One Biopharmaceuticals, Inc.M Exercise/Conversion	COO and CFO	MExercise/Conversion	+1,375 sh	—	—	266,606
2025-08-15	DAWNDay One Biopharmaceuticals, Inc.M Exercise/Conversion	COO and CFO	MExercise/Conversion	+2,250 sh	—	—	268,856
2025-08-15	DAWNDay One Biopharmaceuticals, Inc.M Exercise/Conversion	COO and CFO	MExercise/Conversion	+6,625 sh	—	—	275,481
2025-08-15	DAWNDay One Biopharmaceuticals, Inc.M Exercise/Conversion	COO and CFO	MExercise/Conversion	+6,625 sh	—	—	282,106
2025-08-15	DAWNDay One Biopharmaceuticals, Inc. · Restricted Stock Unit (RSU)M Exercise/Conversion	COO and CFO	MExercise/Conversion	−1,375 sh	—	—	1,375
2025-08-15	DAWNDay One Biopharmaceuticals, Inc. · Restricted Stock Unit (RSU)M Exercise/Conversion	COO and CFO	MExercise/Conversion	−2,250 sh	—	—	11,250
2025-08-15	DAWNDay One Biopharmaceuticals, Inc. · Restricted Stock Unit (RSU)M Exercise/Conversion	COO and CFO	MExercise/Conversion	−6,625 sh	—	—	59,625
2025-08-15	DAWNDay One Biopharmaceuticals, Inc. · Restricted Stock Unit (RSU)M Exercise/Conversion	COO and CFO	MExercise/Conversion	−6,625 sh	—	—	86,125

Recent filings

Accepted (ET)
Apr 234
York Charles N II0001655962-26-000005
SEC(opens sec.gov)
Feb 184
York Charles N II0001655962-26-000004
SEC(opens sec.gov)

Companies

Address

1800 SIERRA POINT PARKWAY, SUITE 200

BRISBANE, CA, 94005