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Mersana Therapeutics, Inc.

MRSNDelisted Jan 6, 2026
Industry
Pharmaceutical Preparations
SEC CIK
0001442836

Mersana Therapeutics, Inc. was delisted on Jan 6, 2026; its insiders filed their last Form 4 on Jan 6, 2026; 51 institutions reported holding it in 13F filings for Q4 2025, worth $64.8M in total; no superinvestor held it.

Open-market trades, last 90 days

Open-market purchases (P) and sales (S) by Mersana Therapeutics, Inc. insiders, counted by Form 4 filing. Trades with a flagged price and duplicate filings are left out.

Open-market buys
0 filings
Open-market sells
0 filings
Insiders trading
0
Net value
$0
Purchases minus sales

Insider roster

Directors, officers and 10% owners who have filed a Form 4 for Mersana Therapeutics, Inc., current and former, most recent filer first. Last reported holding is the position after the last non-derivative trade in their latest filing.

Insider roster for Mersana Therapeutics, Inc.
NameTitleLast reported holdingLast filingFilings, past year
Mott David MDirector0IndirectJan 6, 20261
Hege KristenDirector0Jan 6, 20261
Dere Willard HDirector0Jan 6, 20261
Protopapas AnnaDirector0IndirectJan 6, 20261
Alleva Lawrence MDirector0IndirectJan 6, 20261
Carvajal AlejandraSVP, Chief Legal Officer0Jan 6, 20261
Huber Martin H. Jr.President, CEO0Jan 6, 20261
Hack Andrew A. F.Director0IndirectJan 6, 20261
Lowinger Timothy BSVP, Chief Sci.&Tech. Officer0Jan 6, 20261
Diaz Allene M.Director0Jan 6, 20261
DeSchuytner BrianSVP, COO & CFO0Jan 6, 20261
Mandelia AshishVP, Chief Accounting Officer0Jan 6, 20261
Bala MohanSVP, Chief Development0Jan 6, 20262
EcoR1 Capital, LLC10% Owner11,328,000IndirectDec 23, 20240
Misra TusharSVP, Chief Manuf. Officer17,966Jan 17, 20240
Yang ArvinSVP, Chief Medical Officer30,821Jan 18, 20230
Kaufman Michael J.Chief Manufacturing Officer32,622Jul 19, 20210

Insider trades

Each row adds up one type of transaction in one Form 4 filing. Only open-market purchases (P) and sales (S) are shown by default; use the filters to see grants, option exercises and other codes.

Insider trades
Filed (ET)Trade dateFiling delayInsiderTransactionSharesAvg priceValueHolding changeFlags
Oct 28, 2025 (view filing)Oct 271 dayBala MohanSVP, Chief Development OfficerSSale−77$9.90−$762.3−2.6%2.92K after10b5-1
Sep 15, 2025 (view filing)Sep 123 daysHuber Martin H. Jr.President, CEOSSale−2.01K$7.31−$14.7K−17.4%9.57K after10b5-1
Jan 17, 2025 (view filing)Jan 161 dayMandelia AshishVP, Chief Accounting OfficerSSale−3.55K$0.58−$2.06K−5.8%57.5K after10b5-1
Jan 17, 2025 (view filing)Jan 161 dayProtopapas AnnaDirectorSSale−8.64K$0.58−$5.01K−4.9%168.0K after10b5-1
Jan 17, 2025 (view filing)Jan 161 dayLowinger Timothy BSVP, Chief Sci.&Tech. OfficerSSale−8.05K$0.58−$4.67K−3.0%257.7K after10b5-1
Jan 17, 2025 (view filing)Jan 161 dayHuber Martin H. Jr.President, CEOSSale−4.51K$0.58−$2.62K−3.5%122.9K after10b5-1
Jan 17, 2025 (view filing)Jan 161 dayDeSchuytner BrianSVP, COO & CFOSSale−8.47K$0.58−$4.91K−6.5%121.4K after10b5-1
Jan 17, 2025 (view filing)Jan 161 dayCarvajal AlejandraSVP, Chief Legal OfficerSSale−5.10K$0.58−$2.96K−6.1%78.3K after10b5-1
Jan 17, 2025 (view filing)Jan 161 dayBala MohanSVP, Chief Development OfficerSSale−5.94K$0.58−$3.44K−7.9%68.9K after10b5-1
Jan 16, 2025 (view filing)Jan 151 dayProtopapas AnnaDirectorSSale−6.19K$0.63−$3.90K−3.8%155.4K after10b5-1
Jan 16, 2025 (view filing)Jan 151 dayMandelia AshishVP, Chief Accounting OfficerSSale−1.79K$0.63−$1.13K−3.3%52.4K after10b5-1
Jan 16, 2025 (view filing)Jan 151 dayLowinger Timothy BSVP, Chief Sci.&Tech. OfficerSSale−1.79K$0.63−$1.13K−0.7%245.9K after10b5-1
Jan 16, 2025 (view filing)Jan 151 dayDeSchuytner BrianSVP, COO & CFOSSale−2.33K$0.63−$1.47K−2.1%109.0K after10b5-1
Jan 16, 2025 (view filing)Jan 151 dayCarvajal AlejandraSVP, Chief Legal OfficerSSale−952$0.63−$599.76−1.3%70.9K after10b5-1
Jan 15, 2025 (view filing)Jan 141 dayProtopapas AnnaDirectorSSale−11.5K$0.66−$7.61K−7.4%144.9K after10b5-1
Jan 15, 2025 (view filing)Jan 141 dayMandelia AshishVP, Chief Accounting OfficerSSale−1.01K$0.66−$664.62−2.0%49.4K after10b5-1
Jan 15, 2025 (view filing)Jan 141 dayLowinger Timothy BSVP, Chief Sci.&Tech. OfficerSSale−3.48K$0.66−$2.30K−1.4%242.9K after10b5-1
Jan 15, 2025 (view filing)Jan 141 dayDeSchuytner BrianSVP, COO & CFOSSale−3.71K$0.66−$2.45K−3.4%105.1K after10b5-1
Jan 15, 2025 (view filing)Jan 141 dayCarvajal AlejandraSVP, Chief Legal OfficerSSale−3.33K$0.66−$2.20K−4.6%69.3K after10b5-1
Jan 15, 2025 (view filing)Jan 141 dayBala MohanSVP, Chief Development OfficerSSale−3.25K$0.66−$2.15K−5.1%60.2K after10b5-1
Oct 29, 2024 (view filing)Oct 281 dayBala MohanSVP, Chief Development OfficerSSale−1.88K$1.90−$3.58K−3.3%54.7K after10b5-1
Oct 7, 2024 (view filing)Oct 2-35 daysLateDeSchuytner BrianSVP, COO & CFOSSale−13.7K$1.98−$27.2K−12.6%94.8K after2 lots10b5-1
Oct 7, 2024 (view filing)Oct 2-35 daysLateCarvajal AlejandraSVP, Chief Legal OfficerSSale−13.7K$1.98−$27.2K−17.7%63.7K after2 lots10b5-1
Oct 7, 2024 (view filing)Oct 2-35 daysLateBala MohanSVP, Chief Development OfficerSSale−13.7K$1.98−$27.2K−21.4%50.4K after2 lots10b5-1
Oct 7, 2024 (view filing)Oct 2-35 daysLateMandelia AshishVP, Chief Accounting OfficerSSale−8.22K$1.98−$16.3K−14.7%47.8K after2 lots10b5-1
Oct 7, 2024 (view filing)Oct 2-35 daysLateLowinger Timothy BSVP, Chief Sci.&Tech. OfficerSSale−13.7K$1.98−$27.2K−5.5%235.6K after2 lots10b5-1
Sep 13, 2024 (view filing)Sep 121 dayHuber Martin H. Jr.President, CEOSSale−50.4K$1.76−$88.7K−30.2%116.3K after10b5-1
Jan 17, 2024 (view filing)Jan 161 dayMandelia AshishVP, Chief Accounting OfficerSSale−5.03K$2.71−$13.6K−17.7%23.3K afterFrom original10b5-1
Jan 17, 2024 (view filing)Jan 161 dayProtopapas AnnaDirectorSSale−29.4K$2.71−$79.7K−19.0%125.2K after10b5-1
Jan 17, 2024 (view filing)Jan 161 dayMisra TusharSVP, Chief Manuf. OfficerSSale−3.36K$2.71−$9.10K−15.7%18.0K after10b5-1
Jan 17, 2024 (view filing)Jan 161 dayLowinger Timothy BSVP, Chief Sci.&Tech. OfficerSSale−10.4K$2.71−$28.2K−5.0%199.3K after10b5-1
Jan 17, 2024 (view filing)Jan 161 dayCarvajal AlejandraSVP, Chief Legal OfficerSSale−4.38K$2.71−$11.9K−13.8%27.4K after10b5-1
Jan 17, 2024 (view filing)Jan 161 dayDeSchuytner BrianSVP, COO & CFOSSale−9.33K$2.71−$25.3K−14.6%54.5K after10b5-1
Jan 17, 2024 (view filing)Jan 161 dayBala MohanSVP, Chief Development OfficerSSale−3.43K$2.71−$9.30K−19.6%14.1K after10b5-1
Oct 27, 2023 (view filing)Oct 261 dayBala MohanSVP, Chief Development OfficerSSale−1.91K$1.13−$2.16K−18.0%8.73K after10b5-1
Aug 18, 2023 (view filing)Aug 171 dayMisra TusharSVP, Chief Manuf. OfficerSSale−1.91K$1.18−$2.25K−14.2%11.5K after10b5-1
Apr 28, 2023 (view filing)Apr 271 dayCarvajal AlejandraSVP, Chief Legal OfficerSSale−3.94K$3.89−$15.3K−16.3%20.3K after10b5-1
Jan 18, 2023 (view filing)Jan 171 dayYang ArvinSVP, Chief Medical OfficerSSale−2.21K$5.74−$12.7K−6.7%30.8K after
Jan 18, 2023 (view filing)Jan 171 dayProtopapas AnnaPresident & CEOSSale−17.3K$5.74−$99.6K−26.3%48.7K after
Jan 18, 2023 (view filing)Jan 171 dayMandelia AshishVP, ControllerSSale−3.58K$5.74−$20.5K−20.8%13.6K after
Jan 18, 2023 (view filing)Jan 171 dayMisra TusharSVP, CMOSSale−458$5.74−$2.63K−7.2%5.93K after
Jan 18, 2023 (view filing)Jan 171 dayLowinger Timothy BSVP, Chief Sci.&Tech. Off.SSale−6.23K$5.74−$35.8K−3.3%180.4K after
Jan 18, 2023 (view filing)Jan 171 dayDeSchuytner BrianSVP, Chief Financial OfficerSSale−5.13K$5.74−$29.5K−13.5%32.8K after
Jan 18, 2023 (view filing)Jan 171 dayCarvajal AlejandraSVP, Chief Legal OfficerSSale−782$5.74−$4.49K−6.6%11.0K after
Dec 2, 2022 (view filing)Dec 11 dayYang ArvinChief Medical OfficerSSale−5.53K$6.59−$36.4K−17.6%25.9K after
Aug 18, 2022 (view filing)Aug 171 dayMisra TusharChief Manufacturing OfficerSSale−1.88K$7.10−$13.3K−30.1%4.37K after
Jun 2, 2022 (view filing)May 31-Jun 22 daysHack Andrew A. F.DirectorPPurchase+95.5K$3.27+$312.1K+1.1%8.66M after2 lots
May 26, 2022 (view filing)May 24-262 daysHack Andrew A. F.DirectorPPurchase+265.2K$3.22+$854.9K+3.2%8.57M after3 lots
May 23, 2022 (view filing)May 19-234 daysHack Andrew A. F.DirectorPPurchase+215.6K$3.47+$747.3K+2.7%8.30M after3 lots
May 18, 2022 (view filing)May 16-182 daysHack Andrew A. F.DirectorPPurchase+350.0K$3.25+$1.14M+4.5%8.09M after3 lots