Dere Willard H

CIK 00013115697 companiesCAMBRIDGE, MA

SEC Profile

Transactions

Companies

Filings

CIK

0001311569

Recent Transactions

50 trades

Disposition to Issuer
Mersana Therapeutics, Inc.$MRSN
Stock Option (right to buy)
2026-01-06−1,000→ 0 total
Disposition to Issuer
Mersana Therapeutics, Inc.$MRSN
Stock Option (right to buy)
2026-01-06−2,200→ 0 total
Disposition to Issuer
Mersana Therapeutics, Inc.$MRSN
Stock Option (right to buy)
2026-01-06−544→ 0 total
Disposition to Issuer
Mersana Therapeutics, Inc.$MRSN
Stock Option (right to buy)
2026-01-06−734→ 0 total
Disposition from Tender
Mersana Therapeutics, Inc.$MRSN
Common Stock
2026-01-06−1,567→ 0 total
Disposition to Issuer
Mersana Therapeutics, Inc.$MRSN
Stock Option (right to buy)
2026-01-06−2,460→ 0 total
Disposition to Issuer
Mersana Therapeutics, Inc.$MRSN
Stock Option (right to buy)
2026-01-06−1,800→ 0 total
Disposition to Issuer
Mersana Therapeutics, Inc.$MRSN
Stock Option (right to buy)
2026-01-06−513→ 0 total
Disposition to Issuer
Mersana Therapeutics, Inc.$MRSN
Stock Option (right to buy)
2026-01-06−1,002→ 0 total
Disposition to Issuer
Mersana Therapeutics, Inc.$MRSN
Stock Option (right to buy)
2026-01-06−125→ 0 total
Disposition to Issuer
Mersana Therapeutics, Inc.$MRSN
Stock Option (right to buy)
2026-01-06−800→ 0 total
Disposition to Issuer
Mersana Therapeutics, Inc.$MRSN
Stock Option (right to buy)
2026-01-06−368→ 0 total
Disposition to Issuer
Mersana Therapeutics, Inc.$MRSN
Stock Option (right to buy)
2026-01-06−450→ 0 total
Award
Mersana Therapeutics, Inc.$MRSN
Stock Option (right to buy)
2025-06-12+61,500→ 61,500 total
Award
Metagenomi, Inc.$MGX
Stock Option (Right to Buy)
2025-06-10+21,000→ 21,000 total
Award
BIOMARIN PHARMACEUTICAL INC$BMRN
Common Stock
2025-05-20+6,650→ 38,950 total
Award
Seres Therapeutics, Inc.$MCRB
Stock Option (right to buy)
2025-04-10+100,000→ 100,000 total
Award
Mersana Therapeutics, Inc.$MRSN
Stock Option (right to buy)
2024-06-11+55,000→ 55,000 total
Award
BIOMARIN PHARMACEUTICAL INC$BMRN
Common Stock
2024-05-21+4,720→ 32,300 total
Award
Seres Therapeutics, Inc.$MCRB
Stock Option (right to buy)
2024-04-04+60,000→ 60,000 total
Award
Metagenomi, Inc.$MGX
Stock Option (Right to Buy)
2024-04-01+78,636→ 78,636 total
Award
Mersana Therapeutics, Inc.$MRSN
Common Stock
2024-01-02+6,112→ 39,182 total
Award
Mersana Therapeutics, Inc.$MRSN
Common Stock
2023-10-02+11,011→ 33,070 total
Award
Mersana Therapeutics, Inc.$MRSN
Common Stock
2023-07-03+4,217→ 22,059 total
Award
Seres Therapeutics, Inc.$MCRB
Stock Option (right to buy)
2023-06-22+35,000→ 35,000 total
Award
Mersana Therapeutics, Inc.$MRSN
Stock Option (right to buy)
2023-06-08+18,355→ 18,355 total
Award
Mersana Therapeutics, Inc.$MRSN
Common Stock
2023-06-08+14,467→ 17,842 total
Award
BIOMARIN PHARMACEUTICAL INC$BMRN
Common Stock
2023-05-23+4,190→ 27,580 total
Award
Mersana Therapeutics, Inc.$MRSN
Common Stock
2023-04-03+3,375→ 3,375 total
Disposition to Issuer
Radius Health, Inc.
Stock Option (Right to Buy)
2022-08-15$3.60/sh−10,000→ 0 total
Disposition from Tender
Radius Health, Inc.
Common Stock
2022-08-15$10.00/sh−21,300→ 1,895 total
Disposition to Issuer
Radius Health, Inc.
Common Stock
2022-08-15$10.00/sh−1,895→ 0 total
Award
Seres Therapeutics, Inc.$MCRB
COMMON STOCK
2022-07-05$3.15/sh+31,746→ 31,746 total
Award
Seres Therapeutics, Inc.$MCRB
Stock Option (right to buy)
2022-06-22+35,000→ 35,000 total
Award
Mersana Therapeutics, Inc.$MRSN
Stock Option (right to buy)
2022-06-09+45,000→ 45,000 total
Award
BIOMARIN PHARMACEUTICAL INC$BMRN
Common Stock
2022-05-24+4,980→ 23,390 total
Award
Radius Health, Inc.
Common Stock
2022-01-14+5,500→ 23,195 total
Award
Radius Health, Inc.
Stock Option (Right to Buy)
2022-01-14+10,000→ 10,000 total
Award
Mersana Therapeutics, Inc.$MRSN
Stock Option (right to buy)
2022-01-03+12,847→ 12,847 total
Award
Seres Therapeutics, Inc.$MCRB
Stock Option (right to buy)
2021-06-16+23,000→ 23,000 total
Award
Mersana Therapeutics, Inc.$MRSN
Stock Option (right to buy)
2021-06-11+25,050→ 25,050 total
Award
BIOMARIN PHARMACEUTICAL INC$BMRN
Common Stock
2021-05-25+5,120→ 18,410 total
Award
Radius Health, Inc.
Common Stock
2021-02-22+5,500→ 17,695 total
Award
Radius Health, Inc.
Stock Option (Right to Buy)
2021-02-22+10,000→ 10,000 total
Award
Radius Health, Inc.
Stock Option (Right to Buy)
2021-01-21+20,000→ 20,000 total
Award
Mersana Therapeutics, Inc.$MRSN
Stock Option (right to buy)
2021-01-15+3,141→ 3,141 total
Sale
BIOMARIN PHARMACEUTICAL INC$BMRN
Common Stock
2020-06-26$123.61/sh−4,430→ 13,290 total
Award
Mersana Therapeutics, Inc.$MRSN
Stock Option (right to buy)
2020-06-25+9,200→ 9,200 total
Award
Seres Therapeutics, Inc.$MCRB
Stock Option (right to buy)
2020-06-18+30,000→ 30,000 total
Award
BIOMARIN PHARMACEUTICAL INC$BMRN
Common Stock
2020-05-27+4,300→ 17,720 total

Companies

Recent Filings

Address

C/O MERSANA THERAPEUTICS, INC. 840 MEMORIAL DRIVE

CAMBRIDGE, MA, 02139

View on SEC.gov