Ownership history in CSS LLC/IL · 9 quarters on record
This page tracks every 13F SEC filing in which CSS LLC/IL reported a position in ALNYLAM PHARMACEUTICALS INC (ALNY). 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 | ADDED | 2,010 | +1,610 | +402.5% | 0.04% | $917K | $456.00 |
| 2025 Q3 | REDUCED | 400 | -7,100 | -94.7% | 0.01% | $182K | $456.00 |
| 2024 Q3 | ADDED | 7,500 | +7,000 | +1400.0% | 0.09% | $2.1M | $275.03 |
| 2024 Q2 | REDUCED | 500 | -200 | -28.6% | 0.01% | $122K | $243.00 |
As of 2025 Q4 — sorted by position size