Ownership history in RENAISSANCE TECHNOLOGIES LLC · 23 quarters on record
This page tracks every 13F SEC filing in which RENAISSANCE TECHNOLOGIES LLC reported a position in MERSANA THERAPEUTICS INC (MRSN). Data includes quarterly share count, position size as % of portfolio, estimated market value, and end-of-quarter stock price — sourced directly from SEC EDGAR 13F filings.
| Quarter | Action | Shares | Change | Chg % | % of Fund | Mkt Value | Price (EOQ) |
|---|---|---|---|---|---|---|---|
| 2025 Q3 | REDUCED | 88,465 | -2,761,729 | -96.9% | 0.00% | $686K | — |
| 2025 Q2 | ADDED | 2,850,194 | +2,010,275 | +239.3% | 0.00% | $844K | — |
| 2025 Q1 | ADDED | 839,919 | +233,634 | +38.5% | 0.00% | $289K | — |
| 2024 Q4 | ADDED | 606,285 | +113,566 | +23.0% | 0.00% | $867K | — |
| 2024 Q3 | REDUCED | 492,719 | -955,500 | -66.0% | 0.00% | $931K | — |
| 2024 Q2 | ADDED | 1,448,219 | +20,400 | +1.4% | 0.00% | $2.9M | — |
| 2024 Q1 | ADDED | 1,427,819 | +562,088 | +64.9% | 0.01% | $6.4M | — |
| 2023 Q4 | REDUCED | 865,731 | -60,188 | -6.5% | 0.00% | $2.0M | — |
| 2023 Q3 | REDUCED | 925,919 | -122,000 | -11.6% | 0.00% | $1.2M | — |
| 2023 Q2 | REDUCED | 1,047,919 | -202,600 | -16.2% | 0.00% | $3.4M | — |
As of 2025 Q4 — sorted by position size