Group One Trading’s Mersana Therapeutics MRSN Stock Holding History
Bought
Maintained
Sold
| Quarter | Market Value | Status | Shares |
Change in Stake | Trade Value | Portfolio Weight | Portfolio Position | |
|---|---|---|---|---|---|---|---|---|
|
2025
Q3 | – | Sell |
-20
| Closed | -$148 | – | 8858 |
|
|
2025
Q2 | $148 | Hold |
20
| – | – | ﹤0.01% | 7764 |
|
|
2025
Q1 | $172 | Sell |
20
-2,556
| -99% | -$39.4K | ﹤0.01% | 7383 |
|
|
2024
Q4 | $92.1K | Sell |
2,576
-48
| -2% | -$2.48K | ﹤0.01% | 4594 |
|
|
2024
Q3 | $124K | Sell |
2,624
-36
| -1% | -$1.59K | ﹤0.01% | 4003 |
|
|
2024
Q2 | $134K | Buy |
2,660
+2,628
| +8,213% | +$190K | ﹤0.01% | 3722 |
|
|
2024
Q1 | $3.58K | Sell |
32
-48
| -60% | -$4.77K | ﹤0.01% | 6316 |
|
|
2023
Q4 | $4.64K | Sell |
80
-380
| -83% | -$15.3K | ﹤0.01% | 6542 |
|
|
2023
Q3 | $14.6K | Sell |
460
-3,648
| -89% | -$173K | ﹤0.01% | 6116 |
|
|
2023
Q2 | $338K | Buy |
4,108
+3,228
| +367% | +$472K | ﹤0.01% | 3416 |
|
|
2023
Q1 | $90.4K | Buy |
+880
| New | +$124K | ﹤0.01% | 4385 |
|
|
2022
Q4 | – | Sell |
-36
| Closed | -$6K | – | 7788 |
|
|
2022
Q3 | $6K | Sell |
36
-52
| -59% | -$8.45K | ﹤0.01% | 6755 |
|
|
2022
Q2 | $10K | Sell |
88
-644
| -88% | -$60.6K | ﹤0.01% | 6759 |
|
|
2022
Q1 | $73K | Buy |
732
+88
| +14% | +$10.3K | ﹤0.01% | 5795 |
|
|
2021
Q4 | $100K | Buy |
+644
| New | +$125K | ﹤0.01% | 5726 |
|
|
2021
Q3 | – | Sell |
-88
| Closed | -$30K | – | 8547 |
|
|
2021
Q2 | $30K | Sell |
88
-400
| -82% | -$151K | ﹤0.01% | 6956 |
|
|
2021
Q1 | $197K | Buy |
488
+88
| +22% | +$42.7K | ﹤0.01% | 5045 |
|
|
2020
Q4 | $266K | Buy |
400
+360
| +900% | +$200K | ﹤0.01% | 3844 |
|
|
2020
Q3 | $19K | Sell |
40
-488
| -92% | -$247K | ﹤0.01% | 5155 |
|
|
2020
Q2 | $309K | Buy |
+528
| New | +$180K | ﹤0.01% | 3016 |
|
Other funds holding MRSN
Group One Trading's MRSN Position: Q1 2026 in Review
Group One Trading sold out of Mersana Therapeutics (MRSN) in Q1 2026, closing a stake of 1,073 shares — an estimated $31K sold.
Group One Trading first reported a position in MRSN in Q4 2020 and held it in 18 quarters. The position peaked at $527K in Q2 2023. 1 fund tracked by Wall St. Rank holds MRSN as of Q1 2026.
- Group One Trading reported no remaining Mersana Therapeutics position as of Q1 2026 after selling out during the quarter.
- Group One Trading sold 1,073 Mersana Therapeutics shares in Q1 2026, an estimated $31K.
- Group One Trading first reported a position in Mersana Therapeutics in Q4 2020 and held it in 18 quarters.
- Group One Trading's Mersana Therapeutics position peaked at $527K in Q2 2023.
- 1 fund tracked by Wall St. Rank held Mersana Therapeutics as of Q1 2026.
Based on Group One Trading's 13F filing for Q1 2026, filed 13 May 2026.