Insider · CIK 0001311569

Dere Willard H

Reports to the SEC for 7 companies · CAMBRIDGE, MA

sec.gov

Transactions

Companies

Filings

CIK

0001311569

Forms 4 and 5

Insider transactions

50 trades

Date	Company	Role	Code	Shares	Price	Value	Shares after
2026-07-08	MCRBSeres Therapeutics, Inc. · Stock Option (right to buy)A Award	Director	AAward	+6,500 sh	—	—	6,500
2026-06-09	MGXMetagenomi Therapeutics, Inc. · Stock Option (Right to Buy)A Award	Director	AAward	+21K sh	—	—	21,000
2026-06-02	BMRNBIOMARIN PHARMACEUTICAL INCA Award	Director	AAward	+7,490 sh	—	—	46,440
2026-01-06	MRSNMersana Therapeutics, Inc. · Stock Option (right to buy)D Disposition to Issuer	Director	DDisposition to Issuer	−2,460 sh	—	—	0
2026-01-06	MRSNMersana Therapeutics, Inc. · Stock Option (right to buy)D Disposition to Issuer	Director	DDisposition to Issuer	−800 sh	—	—	0
2026-01-06	MRSNMersana Therapeutics, Inc. · Stock Option (right to buy)D Disposition to Issuer	Director	DDisposition to Issuer	−544 sh	—	—	0
2026-01-06	MRSNMersana Therapeutics, Inc. · Stock Option (right to buy)D Disposition to Issuer	Director	DDisposition to Issuer	−1,000 sh	—	—	0
2026-01-06	MRSNMersana Therapeutics, Inc. · Stock Option (right to buy)D Disposition to Issuer	Director	DDisposition to Issuer	−450 sh	—	—	0
2026-01-06	MRSNMersana Therapeutics, Inc. · Stock Option (right to buy)D Disposition to Issuer	Director	DDisposition to Issuer	−368 sh	—	—	0
2026-01-06	MRSNMersana Therapeutics, Inc. · Stock Option (right to buy)D Disposition to Issuer	Director	DDisposition to Issuer	−125 sh	—	—	0
2026-01-06	MRSNMersana Therapeutics, Inc. · Stock Option (right to buy)D Disposition to Issuer	Director	DDisposition to Issuer	−1,002 sh	—	—	0
2026-01-06	MRSNMersana Therapeutics, Inc. · Stock Option (right to buy)D Disposition to Issuer	Director	DDisposition to Issuer	−513 sh	—	—	0
2026-01-06	MRSNMersana Therapeutics, Inc. · Stock Option (right to buy)D Disposition to Issuer	Director	DDisposition to Issuer	−1,800 sh	—	—	0
2026-01-06	MRSNMersana Therapeutics, Inc. · Stock Option (right to buy)D Disposition to Issuer	Director	DDisposition to Issuer	−734 sh	—	—	0
2026-01-06	MRSNMersana Therapeutics, Inc. · Stock Option (right to buy)D Disposition to Issuer	Director	DDisposition to Issuer	−2,200 sh	—	—	0
2026-01-06	MRSNMersana Therapeutics, Inc.U Disposition from Tender	Director	UDisposition from Tender	−1,567 sh	—	—	0
2025-06-12	MRSNMersana Therapeutics, Inc. · Stock Option (right to buy)A Award	Director	AAward	+61.5K sh	—	—	61,500
2025-06-10	MGXMetagenomi Therapeutics, Inc. · Stock Option (Right to Buy)A Award	Director	AAward	+21K sh	—	—	21,000
2025-05-20	BMRNBIOMARIN PHARMACEUTICAL INCA Award	Director	AAward	+6,650 sh	—	—	38,950
2025-04-10	MCRBSeres Therapeutics, Inc. · Stock Option (right to buy)A Award	Director	AAward	+100K sh	—	—	100,000
2024-06-11	MRSNMersana Therapeutics, Inc. · Stock Option (right to buy)A Award	Director	AAward	+55K sh	—	—	55,000
2024-05-21	BMRNBIOMARIN PHARMACEUTICAL INCA Award	Director	AAward	+4,720 sh	—	—	32,300
2024-04-04	MCRBSeres Therapeutics, Inc. · Stock Option (right to buy)A Award	Director	AAward	+60K sh	—	—	60,000
2024-04-01	MGXMetagenomi Therapeutics, Inc. · Stock Option (Right to Buy)A Award	Director	AAward	+78.6K sh	—	—	78,636
2024-01-02	MRSNMersana Therapeutics, Inc.A Award	Director	AAward	+6,112 sh	—	—	39,182
2023-10-02	MRSNMersana Therapeutics, Inc.A Award	Director	AAward	+11K sh	—	—	33,070
2023-07-03	MRSNMersana Therapeutics, Inc.A Award	Director	AAward	+4,217 sh	—	—	22,059
2023-06-22	MCRBSeres Therapeutics, Inc. · Stock Option (right to buy)A Award	Director	AAward	+35K sh	—	—	35,000
2023-06-08	MRSNMersana Therapeutics, Inc.A Award	Director	AAward	+14.5K sh	—	—	17,842
2023-06-08	MRSNMersana Therapeutics, Inc. · Stock Option (right to buy)A Award	Director	AAward	+18.4K sh	—	—	18,355
2023-05-23	BMRNBIOMARIN PHARMACEUTICAL INCA Award	Director	AAward	+4,190 sh	—	—	27,580
2023-04-03	MRSNMersana Therapeutics, Inc.A Award	Director	AAward	+3,375 sh	—	—	3,375
2022-08-15	Radius Health, Inc.D Disposition to Issuer	Director	DDisposition to Issuer	−1,895 sh	$10.00	−$19K	0
2022-08-15	Radius Health, Inc.Stock Option (Right to Buy)D Disposition to Issuer	Director	DDisposition to Issuer	−10K sh	$3.60	−$36K	0
2022-08-15	Radius Health, Inc.U Disposition from Tender	Director	UDisposition from Tender	−21.3K sh	$10.00	−$213K	1,895
2022-07-05	MCRBSeres Therapeutics, Inc.A Award	Director	AAward	+31.7K sh	$3.15	+$100K	31,746
2022-06-22	MCRBSeres Therapeutics, Inc. · Stock Option (right to buy)A Award	Director	AAward	+35K sh	—	—	35,000
2022-06-09	MRSNMersana Therapeutics, Inc. · Stock Option (right to buy)A Award	Director	AAward	+45K sh	—	—	45,000
2022-05-24	BMRNBIOMARIN PHARMACEUTICAL INCA Award	Director	AAward	+4,980 sh	—	—	23,390
2022-01-14	Radius Health, Inc.A Award	Director	AAward	+5,500 sh	—	—	23,195
2022-01-14	Radius Health, Inc.Stock Option (Right to Buy)A Award	Director	AAward	+10K sh	—	—	10,000
2022-01-03	MRSNMersana Therapeutics, Inc. · Stock Option (right to buy)A Award	Director	AAward	+12.8K sh	—	—	12,847
2021-06-16	MCRBSeres Therapeutics, Inc. · Stock Option (right to buy)A Award	Director	AAward	+23K sh	—	—	23,000
2021-06-11	MRSNMersana Therapeutics, Inc. · Stock Option (right to buy)A Award	Director	AAward	+25.1K sh	—	—	25,050
2021-05-25	BMRNBIOMARIN PHARMACEUTICAL INCA Award	Director	AAward	+5,120 sh	—	—	18,410
2021-02-22	Radius Health, Inc.A Award	Director	AAward	+5,500 sh	—	—	17,695
2021-02-22	Radius Health, Inc.Stock Option (Right to Buy)A Award	Director	AAward	+10K sh	—	—	10,000
2021-01-21	Radius Health, Inc.Stock Option (Right to Buy)A Award	Director	AAward	+20K sh	—	—	20,000
2021-01-15	MRSNMersana Therapeutics, Inc. · Stock Option (right to buy)A Award	Director	AAward	+3,141 sh	—	—	3,141
2020-06-26	BMRNBIOMARIN PHARMACEUTICAL INCS Sale	Director	SSale	−4,430 sh	$123.61	−$548K	13,290

Recent filings

Accepted (ET)
Jul 104
Dere Willard H0001193125-26-300920
SEC(opens sec.gov)
Jun 114
Dere Willard H0001193125-26-267255
SEC(opens sec.gov)
Jun 44
Dere Willard H0001628280-26-040911
SEC(opens sec.gov)
Jan 64
Dere Willard H0001104659-26-001382
SEC(opens sec.gov)
Jun 134
Dere Willard H0001104659-25-059443
SEC(opens sec.gov)
Jun 124
Dere Willard H0000950170-25-085488
SEC(opens sec.gov)
May 224
Dere Willard H0001048477-25-000068
SEC(opens sec.gov)
Apr 114
Dere Willard H0000950170-25-053243
SEC(opens sec.gov)

Companies

Address

C/O SERES THERAPEUTICS, INC. 101 CAMBRIDGE PARK DRIVE

CAMBRIDGE, MA, 02140