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 | |
|---|---|---|---|---|---|---|---|---|
|
2026
Q1 | – | Sell |
-29,800
| Closed | -$862K | – | 8324 |
|
|
2025
Q4 | $862K | Buy |
29,800
+22,000
| +282% | +$418K | ﹤0.01% | 3026 |
|
|
2025
Q3 | $60.5K | Buy |
7,800
+7,408
| +1,890% | +$55.6K | ﹤0.01% | 5789 |
|
|
2025
Q2 | $2.9K | Sell |
392
-160
| -29% | -$1.41K | ﹤0.01% | 7291 |
|
|
2025
Q1 | $4.75K | Sell |
552
-2,388
| -81% | -$36.8K | ﹤0.01% | 6669 |
|
|
2024
Q4 | $105K | Buy |
2,940
+36
| +1% | +$1.86K | ﹤0.01% | 4479 |
|
|
2024
Q3 | $137K | Sell |
2,904
-9,372
| -76% | -$414K | ﹤0.01% | 3931 |
|
|
2024
Q2 | $617K | Buy |
12,276
+12,020
| +4,695% | +$869K | ﹤0.01% | 2371 |
|
|
2024
Q1 | $28.7K | Sell |
256
-508
| -66% | -$50.5K | ﹤0.01% | 5155 |
|
|
2023
Q4 | $44.3K | Sell |
764
-3,292
| -81% | -$132K | ﹤0.01% | 5164 |
|
|
2023
Q3 | $129K | Buy |
4,056
+464
| +13% | +$22.1K | ﹤0.01% | 4214 |
|
|
2023
Q2 | $295K | Buy |
3,592
+2,752
| +328% | +$403K | ﹤0.01% | 3561 |
|
|
2023
Q1 | $86.3K | Buy |
840
+720
| +600% | +$101K | ﹤0.01% | 4426 |
|
|
2022
Q4 | $17.6K | Sell |
120
-80
| -40% | -$13.5K | ﹤0.01% | 5675 |
|
|
2022
Q3 | $34K | Buy |
200
+80
| +67% | +$13K | ﹤0.01% | 5709 |
|
|
2022
Q2 | $14K | Buy |
+120
| New | +$11.3K | ﹤0.01% | 6563 |
|
|
2022
Q1 | – | Sell |
-540
| Closed | -$84K | – | 8438 |
|
|
2021
Q4 | $84K | Buy |
540
+296
| +121% | +$57.6K | ﹤0.01% | 5883 |
|
|
2021
Q3 | $58K | Buy |
244
+208
| +578% | +$60.8K | ﹤0.01% | 6432 |
|
|
2021
Q2 | $12K | Sell |
36
-1,228
| -97% | -$465K | ﹤0.01% | 7448 |
|
|
2021
Q1 | $511K | Buy |
1,264
+1,244
| +6,220% | +$603K | ﹤0.01% | 4010 |
|
|
2020
Q4 | $13K | Sell |
20
-3,152
| -99% | -$1.75M | ﹤0.01% | 5703 |
|
|
2020
Q3 | $1.48M | Buy |
3,172
+1,924
| +154% | +$972K | ﹤0.01% | 1845 |
|
|
2020
Q2 | $730K | Buy |
+1,248
| New | +$426K | ﹤0.01% | 2324 |
|
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.