Insider · CIK 0001782163

DeSchuytner Brian

Reports to the SEC for 1 company · CAMBRIDGE, MA

sec.gov

Transactions

Companies

Filings

CIK

0001782163

Forms 4 and 5

Insider transactions

50 trades

Date	Company	Role	Code	Shares	Price	Value	Shares after
2026-01-06	MRSNMersana Therapeutics, Inc. · Stock Option (right to buy)D Disposition to Issuer	SVP, COO & CFO	DDisposition to Issuer	−3,515 sh	—	—	0
2026-01-06	MRSNMersana Therapeutics, Inc.U Disposition from Tender	SVP, COO & CFO	UDisposition from Tender	−5,015 sh	—	—	0
2026-01-06	MRSNMersana Therapeutics, Inc. · Restricted Stock UnitsD Disposition to Issuer	SVP, COO & CFO	DDisposition to Issuer	−2,500 sh	—	—	0
2026-01-06	MRSNMersana Therapeutics, Inc. · Restricted Stock UnitsD Disposition to Issuer	SVP, COO & CFO	DDisposition to Issuer	−1,750 sh	—	—	0
2026-01-06	MRSNMersana Therapeutics, Inc. · Restricted Stock UnitsD Disposition to Issuer	SVP, COO & CFO	DDisposition to Issuer	−800 sh	—	—	0
2026-01-06	MRSNMersana Therapeutics, Inc. · Restricted Stock UnitsD Disposition to Issuer	SVP, COO & CFO	DDisposition to Issuer	−250 sh	—	—	0
2026-01-06	MRSNMersana Therapeutics, Inc. · Stock Option (right to buy)D Disposition to Issuer	SVP, COO & CFO	DDisposition to Issuer	−9,422 sh	—	—	0
2026-01-06	MRSNMersana Therapeutics, Inc. · Stock Option (right to buy)D Disposition to Issuer	SVP, COO & CFO	DDisposition to Issuer	−1,077 sh	—	—	0
2026-01-06	MRSNMersana Therapeutics, Inc. · Stock Option (right to buy)D Disposition to Issuer	SVP, COO & CFO	DDisposition to Issuer	−6,381 sh	—	—	0
2026-01-06	MRSNMersana Therapeutics, Inc. · Stock Option (right to buy)D Disposition to Issuer	SVP, COO & CFO	DDisposition to Issuer	−818 sh	—	—	0
2026-01-06	MRSNMersana Therapeutics, Inc. · Stock Option (right to buy)D Disposition to Issuer	SVP, COO & CFO	DDisposition to Issuer	−4,218 sh	—	—	0
2026-01-06	MRSNMersana Therapeutics, Inc. · Stock Option (right to buy)D Disposition to Issuer	SVP, COO & CFO	DDisposition to Issuer	−281 sh	—	—	0
2026-01-06	MRSNMersana Therapeutics, Inc. · Stock Option (right to buy)D Disposition to Issuer	SVP, COO & CFO	DDisposition to Issuer	−4,172 sh	—	—	0
2026-01-06	MRSNMersana Therapeutics, Inc. · Stock Option (right to buy)D Disposition to Issuer	SVP, COO & CFO	DDisposition to Issuer	−327 sh	—	—	0
2026-01-06	MRSNMersana Therapeutics, Inc. · Stock Option (right to buy)D Disposition to Issuer	SVP, COO & CFO	DDisposition to Issuer	−2,671 sh	—	—	0
2026-01-06	MRSNMersana Therapeutics, Inc. · Stock Option (right to buy)D Disposition to Issuer	SVP, COO & CFO	DDisposition to Issuer	−178 sh	—	—	0
2026-01-06	MRSNMersana Therapeutics, Inc. · Stock Option (right to buy)D Disposition to Issuer	SVP, COO & CFO	DDisposition to Issuer	−5,590 sh	—	—	0
2026-01-06	MRSNMersana Therapeutics, Inc. · Stock Option (right to buy)D Disposition to Issuer	SVP, COO & CFO	DDisposition to Issuer	−4,009 sh	—	—	0
2026-01-06	MRSNMersana Therapeutics, Inc. · Stock Option (right to buy)D Disposition to Issuer	SVP, COO & CFO	DDisposition to Issuer	−7,734 sh	—	—	0
2025-01-16	MRSNMersana Therapeutics, Inc.S Sale	SVP, COO & CFO	SSale	−8,470 sh	$0.58	−$4,912.6	121,393
2025-01-15	MRSNMersana Therapeutics, Inc.M Exercise/Conversion	SVP, COO & CFO	MExercise/Conversion	+6,250 sh	—	—	115,280
2025-01-15	MRSNMersana Therapeutics, Inc. · Restricted Stock UnitA Award	SVP, COO & CFO	AAward	+62.5K sh	—	—	62,500
2025-01-15	MRSNMersana Therapeutics, Inc. · Stock Option (Right to Buy)A Award	SVP, COO & CFO	AAward	+281K sh	—	—	281,250
2025-01-15	MRSNMersana Therapeutics, Inc. · Restricted Stock UnitM Exercise/Conversion	SVP, COO & CFO	MExercise/Conversion	−14.6K sh	—	—	43,750
2025-01-15	MRSNMersana Therapeutics, Inc. · Restricted Stock UnitM Exercise/Conversion	SVP, COO & CFO	MExercise/Conversion	−6,250 sh	—	—	0
2025-01-15	MRSNMersana Therapeutics, Inc.M Exercise/Conversion	SVP, COO & CFO	MExercise/Conversion	+14.6K sh	—	—	129,863
2025-01-15	MRSNMersana Therapeutics, Inc.S Sale	SVP, COO & CFO	SSale	−2,331 sh	$0.63	−$1,468.53	109,030
2025-01-14	MRSNMersana Therapeutics, Inc.M Exercise/Conversion	SVP, COO & CFO	MExercise/Conversion	+6,250 sh	—	—	111,361
2025-01-14	MRSNMersana Therapeutics, Inc.S Sale	SVP, COO & CFO	SSale	−3,713 sh	$0.66	−$2,450.58	105,111
2025-01-14	MRSNMersana Therapeutics, Inc. · Restricted Stock UnitM Exercise/Conversion	SVP, COO & CFO	MExercise/Conversion	−6,250 sh	—	—	6,250
2025-01-13	MRSNMersana Therapeutics, Inc. · Restricted Stock UnitM Exercise/Conversion	SVP, COO & CFO	MExercise/Conversion	−10K sh	—	—	20,000
2025-01-13	MRSNMersana Therapeutics, Inc.M Exercise/Conversion	SVP, COO & CFO	MExercise/Conversion	+10K sh	—	—	108,824
2024-10-03	MRSNMersana Therapeutics, Inc.S Sale	SVP, COO & CFO	SSale	−5,598 sh	$1.96	−$11K	94,824
2024-10-02	MRSNMersana Therapeutics, Inc.S Sale	SVP, COO & CFO	SSale	−8,089 sh	$2.00	−$16.2K	100,422
2024-10-01	MRSNMersana Therapeutics, Inc.M Exercise/Conversion	SVP, COO & CFO	MExercise/Conversion	+50K sh	—	—	108,511
2024-10-01	MRSNMersana Therapeutics, Inc. · Restricted Stock UnitM Exercise/Conversion	SVP, COO & CFO	MExercise/Conversion	−50K sh	—	—	0
2024-01-16	MRSNMersana Therapeutics, Inc.S Sale	SVP, COO & CFO	SSale	−9,327 sh	$2.71	−$25.3K	54,511
2024-01-15	MRSNMersana Therapeutics, Inc.M Exercise/Conversion	SVP, COO & CFO	MExercise/Conversion	+6,250 sh	—	—	59,880
2024-01-15	MRSNMersana Therapeutics, Inc.M Exercise/Conversion	SVP, COO & CFO	MExercise/Conversion	+3,958 sh	—	—	63,838
2024-01-15	MRSNMersana Therapeutics, Inc. · Restricted Stock UnitA Award	SVP, COO & CFO	AAward	+58.3K sh	—	—	58,333
2024-01-15	MRSNMersana Therapeutics, Inc. · Restricted Stock UnitM Exercise/Conversion	SVP, COO & CFO	MExercise/Conversion	−6,250 sh	—	—	6,250
2024-01-15	MRSNMersana Therapeutics, Inc. · Restricted Stock UnitM Exercise/Conversion	SVP, COO & CFO	MExercise/Conversion	−3,958 sh	—	—	0
2024-01-15	MRSNMersana Therapeutics, Inc. · Stock Option (Right to Buy)A Award	SVP, COO & CFO	AAward	+263K sh	—	—	262,500
2024-01-14	MRSNMersana Therapeutics, Inc.M Exercise/Conversion	SVP, COO & CFO	MExercise/Conversion	+6,250 sh	—	—	55,630
2024-01-14	MRSNMersana Therapeutics, Inc. · Restricted Stock UnitM Exercise/Conversion	SVP, COO & CFO	MExercise/Conversion	−6,250 sh	—	—	12,500
2024-01-13	MRSNMersana Therapeutics, Inc.M Exercise/Conversion	SVP, COO & CFO	MExercise/Conversion	+10K sh	—	—	47,380
2024-01-13	MRSNMersana Therapeutics, Inc. · Restricted Stock UnitM Exercise/Conversion	SVP, COO & CFO	MExercise/Conversion	−10K sh	—	—	30,000
2023-09-05	MRSNMersana Therapeutics, Inc. · Restricted stock unitA Award	SVP, COO & CFO	AAward	+50K sh	—	—	50,000
2023-01-17	MRSNMersana Therapeutics, Inc.S Sale	SVP, COO & CFO	SSale	−5,131 sh	$5.74	−$29.5K	32,781
2023-01-15	MRSNMersana Therapeutics, Inc.M Exercise/Conversion	SVP, COO & CFO	MExercise/Conversion	+6,250 sh	—	—	33,954

Recent filings

Accepted (ET)
Jan 64
DeSchuytner Brian0001104659-26-001365
SEC(opens sec.gov)
Jan 174
DeSchuytner Brian0001104659-25-004592
SEC(opens sec.gov)

Companies

Mersana Therapeutics, Inc.SVP, COO & CFOMRSN

Address

C/O MERSANA THERAPEUTICS, INC. 840 MEMORIAL DRIVE

CAMBRIDGE, MA, 02139