Protopapas Anna

CIK 00013475826 companiesCAMBRIDGE, MA

SEC Profile

Transactions

Companies

Filings

CIK

0001347582

Recent Transactions

50 trades

Disposition to Issuer
Mersana Therapeutics, Inc.$MRSN
Stock Option (right to buy)
2026-01-06−5,227→ 0 total
Disposition from Tender
Mersana Therapeutics, Inc.$MRSN
Common Stock
2026-01-06−9,609→ 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)
2026-01-06−542→ 0 total
Disposition to Issuer
Mersana Therapeutics, Inc.$MRSN
Stock Option (right to buy)
2026-01-06−1→ 0 total
Disposition from Tender
Mersana Therapeutics, Inc.$MRSN
Common Stock
2026-01-06−2,890→ 0 total
Disposition to Issuer
Mersana Therapeutics, Inc.$MRSN
Stock Option (right to buy)
2026-01-06−11,250→ 0 total
Disposition from Tender
Mersana Therapeutics, Inc.$MRSN
Common Stock
2026-01-06−6,721→ 0 total
Disposition to Issuer
Mersana Therapeutics, Inc.$MRSN
Stock Option (right to buy)
2026-01-06−2,500→ 0 total
Disposition to Issuer
Mersana Therapeutics, Inc.$MRSN
Stock Option (right to buy)
2026-01-06−480→ 0 total
Disposition to Issuer
Mersana Therapeutics, Inc.$MRSN
Stock Option (right to buy)
2026-01-06−1,131→ 0 total
Disposition to Issuer
Mersana Therapeutics, Inc.$MRSN
Stock Option (right to buy)
2026-01-06−166→ 0 total
Disposition to Issuer
Mersana Therapeutics, Inc.$MRSN
Stock Option (right to buy)
2026-01-06−18→ 0 total
Disposition to Issuer
Mersana Therapeutics, Inc.$MRSN
Stock Option (right to buy)
2026-01-06−11,761→ 0 total
Disposition to Issuer
Mersana Therapeutics, Inc.$MRSN
Stock Option (right to buy)
2026-01-06−7,519→ 0 total
Disposition to Issuer
Mersana Therapeutics, Inc.$MRSN
Stock Option (right to buy)
2026-01-06−9,043→ 0 total
Disposition to Issuer
Mersana Therapeutics, Inc.$MRSN
Stock Option (right to buy)
2026-01-06−665→ 0 total
Disposition to Issuer
Mersana Therapeutics, Inc.$MRSN
Stock Option (right to buy)
2026-01-06−988→ 0 total
Disposition to Issuer
Mersana Therapeutics, Inc.$MRSN
Stock Option (right to buy)
2026-01-06−8,137→ 0 total
Disposition to Issuer
Mersana Therapeutics, Inc.$MRSN
Stock Option (right to buy)
2026-01-06−2,460→ 0 total
Award
Nuvalent, Inc.$NUVL
Stock Option (Right to Buy)
2025-06-18+4,147→ 4,147 total
Award
Nuvalent, Inc.$NUVL
Class A Common Stock
2025-06-18+2,647→ 5,146 total
Award
Mersana Therapeutics, Inc.$MRSN
Stock Option (right to buy)
2025-06-12+61,500→ 61,500 total
Sale
Mersana Therapeutics, Inc.$MRSN
Common Stock
2025-01-16$0.58/sh−8,637→ 168,041 total
Sale
Mersana Therapeutics, Inc.$MRSN
Common Stock
2025-01-15$0.63/sh−6,191→ 155,428 total
Exercise/Conversion
Mersana Therapeutics, Inc.$MRSN
Common Stock
2025-01-15+21,250→ 176,678 total
Exercise/Conversion
Mersana Therapeutics, Inc.$MRSN
Restricted Stock Unit
2025-01-15−21,250→ 0 total
Sale
Mersana Therapeutics, Inc.$MRSN
Common Stock
2025-01-14$0.66/sh−11,534→ 144,869 total
Exercise/Conversion
Mersana Therapeutics, Inc.$MRSN
Common Stock
2025-01-14+16,750→ 161,619 total
Exercise/Conversion
Mersana Therapeutics, Inc.$MRSN
Restricted Stock Unit
2025-01-14−16,750→ 16,750 total
Exercise/Conversion
Mersana Therapeutics, Inc.$MRSN
Common Stock
2025-01-13+31,250→ 156,403 total
Exercise/Conversion
Mersana Therapeutics, Inc.$MRSN
Restricted Stock Unit
2025-01-13−31,250→ 62,500 total
Award
Nuvalent, Inc.$NUVL
Class A Common Stock
2024-06-12+2,499→ 2,499 total
Award
Nuvalent, Inc.$NUVL
Stock Option (Right to Buy)
2024-06-12+3,789→ 3,789 total
Award
Mersana Therapeutics, Inc.$MRSN
Stock Option (right to buy)
2024-06-11+55,000→ 55,000 total
Sale
Mersana Therapeutics, Inc.$MRSN
Common Stock
2024-01-16$2.71/sh−29,399→ 125,153 total
Exercise/Conversion
Mersana Therapeutics, Inc.$MRSN
Restricted Stock Unit
2024-01-15−17,708→ 0 total
Exercise/Conversion
Mersana Therapeutics, Inc.$MRSN
Restricted Stock Unit
2024-01-15−21,250→ 21,250 total
Exercise/Conversion
Mersana Therapeutics, Inc.$MRSN
Common Stock
2024-01-15+21,250→ 136,844 total
Exercise/Conversion
Mersana Therapeutics, Inc.$MRSN
Common Stock
2024-01-15+17,708→ 154,552 total
Exercise/Conversion
Mersana Therapeutics, Inc.$MRSN
Restricted Stock Unit
2024-01-14−16,750→ 33,500 total
Exercise/Conversion
Mersana Therapeutics, Inc.$MRSN
Common Stock
2024-01-14+16,750→ 115,594 total
Exercise/Conversion
Mersana Therapeutics, Inc.$MRSN
Restricted Stock Unit
2024-01-13−31,250→ 93,750 total
Exercise/Conversion
Mersana Therapeutics, Inc.$MRSN
Common Stock
2024-01-13+31,250→ 98,844 total
Exercise/Conversion
Nuvalent, Inc.$NUVL
Class A Common Stock
2023-12-18$9.36/sh+5,000→ 5,000 total
Exercise/Conversion
Nuvalent, Inc.$NUVL
Stock Option (Right to Buy)
2023-12-18−5,000→ 15,000 total
Sale
Nuvalent, Inc.$NUVL
Class A Common Stock
2023-12-18$75.67/sh−5,000→ 0 total
Award
Mersana Therapeutics, Inc.$MRSN
Stock Option (right to buy)
2023-09-11+16,643→ 16,643 total
Award
Mersana Therapeutics, Inc.$MRSN
Common Stock
2023-09-11+16,643→ 67,594 total
Award
Nuvalent, Inc.$NUVL
Stock Option (Right to Buy)
2023-06-15+15,000→ 15,000 total

Companies

Recent Filings

4
Protopapas Anna
Jan 6, 2026

Address

C/O MERSANA THERAPEUTICS, INC. 840 MEMORIAL DRIVE

CAMBRIDGE, MA, 02139

View on SEC.gov