Insidervault
LIVE FROM THE DATABASETRANSACTIONS 362,114COMPANIES 5,761LATEST TRADE Oct 16UPDATED Oct 16, 09:12 PM
Reporting ownerCIK 0001311569

Willard H. Dere

16 transactions in 4 companies, from January 6, 2026 to July 8, 2026.

Transactions
164 companies
Bought · P
$0open market
Sold · S
$0open market
Net
+$0net buying

By company

Where this insider traded.

CompanyTickerTradesBoughtSold
Mersana Therapeutics, Inc.MRSN13——
BIOMARIN PHARMACEUTICAL INCBMRN1——
Seres Therapeutics, Inc.MCRB1——
Metagenomi Therapeutics, Inc.MGX1——

All transactions

16 in total, newest filings first.

CompanyTickerInsiderDateCodeSharesPriceValue
Seres Therapeutics, Inc.MCRBWillard H. DereDirDERIVJul 8A6,500$0.00—?
Metagenomi Therapeutics, Inc.MGXWillard H. DereDirDERIVJun 9A21,000$0.00—?
BIOMARIN PHARMACEUTICAL INCBMRNWillard H. DereDirJun 2A7,490$0.00—
Mersana Therapeutics, Inc.MRSNWillard H. DereDirDERIVJan 6D2,200——
Mersana Therapeutics, Inc.MRSNWillard H. DereDirDERIVJan 6D734——
Mersana Therapeutics, Inc.MRSNWillard H. DereDirDERIVJan 6D1,800——
Mersana Therapeutics, Inc.MRSNWillard H. DereDirDERIVJan 6D513——
Mersana Therapeutics, Inc.MRSNWillard H. DereDirDERIVJan 6D1,002——
Mersana Therapeutics, Inc.MRSNWillard H. DereDirDERIVJan 6D125——
Mersana Therapeutics, Inc.MRSNWillard H. DereDirDERIVJan 6D368——
Mersana Therapeutics, Inc.MRSNWillard H. DereDirDERIVJan 6D450——
Mersana Therapeutics, Inc.MRSNWillard H. DereDirDERIVJan 6D1,000——
Mersana Therapeutics, Inc.MRSNWillard H. DereDirDERIVJan 6D544——
Mersana Therapeutics, Inc.MRSNWillard H. DereDirDERIVJan 6D800——
Mersana Therapeutics, Inc.MRSNWillard H. DereDirDERIVJan 6D2,460——
Mersana Therapeutics, Inc.MRSNWillard H. DereDirJan 6U1,567——