Mersana Therapeutics, Inc. - MRSN
Insiders (Form 4) · last 180 days · showing up to 200 transactions
· Form 144 is shown in the SEC filings tab
· Updating…
Visible: 0
Transaction codes:
P = Open-market purchase ·
S = Open-market sale ·
A = Grant/award ·
M = Exercise/conversion of derivative ·
G = Gift ·
F = Tax withholding ·
J = Other ·
A/D:
A = Acquired (buy/receive) ·
D = Disposed (sell/give)
| Filed | Owner | Title | Code | A/D | Shares | Price | Value | Shares after | SEC |
|---|---|---|---|---|---|---|---|---|---|
| Jan 06, 2026 | — | D | D | 2,200.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 734.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 1,800.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 439.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 1,002.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 118.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 368.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 1,000.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 400.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 2,088.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 2,460.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | U | D | 346,545.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | U | D | 578.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 2,088.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 2,200.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 257.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 380.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 146.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 734.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 138.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 1,800.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 416.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 1,002.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 101.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 368.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 450.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 1,000.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 400.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 142.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 2,460.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | U | D | 578.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 2,200.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 734.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 1,800.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 416.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 1,571.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 2,460.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | U | D | 578.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 2,200.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 734.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 1,800.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 513.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 1,002.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 125.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 368.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 450.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 1,000.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 544.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 800.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 2,460.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | U | D | 1,567.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | SVP, Chief Legal Officer | D | D | 2,166.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | SVP, Chief Legal Officer | D | D | 1,500.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | SVP, Chief Legal Officer | D | D | 717.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | SVP, Chief Legal Officer | D | D | 100.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | SVP, Chief Legal Officer | D | D | 7,921.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | SVP, Chief Legal Officer | D | D | 1,078.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | SVP, Chief Legal Officer | D | D | 4,922.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | SVP, Chief Legal Officer | D | D | 1,527.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | SVP, Chief Legal Officer | D | D | 1,800.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | SVP, Chief Legal Officer | D | D | 4,500.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | SVP, Chief Legal Officer | D | D | 6,702.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | SVP, Chief Legal Officer | D | D | 3,047.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | SVP, Chief Legal Officer | U | D | 3,131.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | SVP, Chief Development | D | D | 2,500.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | SVP, Chief Development | D | D | 1,750.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | SVP, Chief Development | D | D | 700.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | SVP, Chief Development | D | D | 9,309.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | SVP, Chief Development | D | D | 1,190.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | SVP, Chief Development | D | D | 5,246.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | SVP, Chief Development | D | D | 1,053.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | SVP, Chief Development | D | D | 2,646.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | SVP, Chief Development | D | D | 1,853.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | SVP, Chief Development | D | D | 7,734.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | SVP, Chief Development | D | D | 3,515.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | SVP, Chief Development | U | D | 2,927.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 500.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 384.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 358.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 2,200.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 159.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 310.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 561.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 215.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 734.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 181.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 1,800.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 546.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 1,002.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 133.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 368.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 450.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 1,000.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 544.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 400.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 142.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 800.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 2,460.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | U | D | 84.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | U | D | 578.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | President, CEO | D | D | 7,256.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | President, CEO | D | D | 1,328.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | President, CEO | D | D | 13,340.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | President, CEO | D | D | 7,467.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | President, CEO | D | D | 497.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | President, CEO | D | D | 364.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | President, CEO | D | D | 27,878.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | President, CEO | D | D | 12,121.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | President, CEO | D | D | 179.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | President, CEO | D | D | 734.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | President, CEO | D | D | 135.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | President, CEO | D | D | 1,800.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | President, CEO | D | D | 407.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | President, CEO | D | D | 1,002.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | President, CEO | D | D | 99.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | President, CEO | D | D | 1,923.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | President, CEO | D | D | 26,713.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | President, CEO | D | D | 5,938.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | President, CEO | U | D | 9,573.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | VP, Chief Accounting Officer | D | D | 666.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | VP, Chief Accounting Officer | D | D | 500.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | VP, Chief Accounting Officer | D | D | 212.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | VP, Chief Accounting Officer | D | D | 192.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | VP, Chief Accounting Officer | D | D | 1,842.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | VP, Chief Accounting Officer | D | D | 1,157.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | VP, Chief Accounting Officer | D | D | 1,183.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | VP, Chief Accounting Officer | D | D | 722.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | VP, Chief Accounting Officer | D | D | 788.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | VP, Chief Accounting Officer | D | D | 359.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | VP, Chief Accounting Officer | D | D | 773.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | VP, Chief Accounting Officer | D | D | 310.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | VP, Chief Accounting Officer | D | D | 44.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | VP, Chief Accounting Officer | D | D | 555.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | VP, Chief Accounting Officer | D | D | 2,870.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | VP, Chief Accounting Officer | D | D | 1,312.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | VP, Chief Accounting Officer | D | D | 1,687.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | VP, Chief Accounting Officer | U | D | 2,300.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 166.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 5,227.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 1,131.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 2,200.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 11,250.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 9,043.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 665.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 11,761.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 988.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 18.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 1.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 8,137.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 542.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 7,519.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 480.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 2,500.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 2,460.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | U | D | 9,609.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | U | D | 2,890.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | U | D | 6,721.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | SVP, Chief Sci.&Tech. Officer | D | D | 2,166.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | SVP, Chief Sci.&Tech. Officer | D | D | 1,500.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | SVP, Chief Sci.&Tech. Officer | D | D | 750.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | SVP, Chief Sci.&Tech. Officer | D | D | 192.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | SVP, Chief Sci.&Tech. Officer | D | D | 1,834.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | SVP, Chief Sci.&Tech. Officer | D | D | 7,959.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | SVP, Chief Sci.&Tech. Officer | D | D | 1,040.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | SVP, Chief Sci.&Tech. Officer | D | D | 5,891.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | SVP, Chief Sci.&Tech. Officer | D | D | 858.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | SVP, Chief Sci.&Tech. Officer | D | D | 3,234.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | SVP, Chief Sci.&Tech. Officer | D | D | 215.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | SVP, Chief Sci.&Tech. Officer | D | D | 4,974.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | SVP, Chief Sci.&Tech. Officer | D | D | 275.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | SVP, Chief Sci.&Tech. Officer | D | D | 3,090.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | SVP, Chief Sci.&Tech. Officer | D | D | 920.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | SVP, Chief Sci.&Tech. Officer | D | D | 419.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | SVP, Chief Sci.&Tech. Officer | D | D | 713.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | SVP, Chief Sci.&Tech. Officer | D | D | 1,578.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | SVP, Chief Sci.&Tech. Officer | D | D | 696.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | SVP, Chief Sci.&Tech. Officer | D | D | 6,702.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | SVP, Chief Sci.&Tech. Officer | D | D | 3,047.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | SVP, Chief Sci.&Tech. Officer | U | D | 10,466.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 2,200.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 734.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 1,800.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 740.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 1,002.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 181.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 368.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 788.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 1,000.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 1,011.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 400.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 264.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | D | D | 2,460.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | U | D | 383.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | — | U | D | 23,546.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | SVP, COO & CFO | D | D | 2,500.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | SVP, COO & CFO | D | D | 1,750.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | SVP, COO & CFO | D | D | 800.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | SVP, COO & CFO | D | D | 250.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | SVP, COO & CFO | D | D | 9,422.0 | — | — | 0.0 | View | |
| Jan 06, 2026 | SVP, COO & CFO | D | D | 1,077.0 | — | — | 0.0 | View |