Renaissance Technologies (RenTech)'s ALEC Position Overview
Renaissance Technologies (RenTech) (via Renaissance Technologies LLC) currently holds 1.29 M shares of Alector, Inc. (ALEC) worth $2.77 M, representing 0.00% of the portfolio. First purchased in 2020-Q2, this medium-term investment has been held for 20 quarters.
Based on 13F filings, Renaissance Technologies (RenTech) has maintained a strategic position in ALEC, demonstrating sustained confidence in this investment. Largest addition occurred in Q4 2025, adding 594,500 shares. Largest reduction occurred in Q3 2025, reducing 305,700 shares.
Analysis based on 13F filings available since 2013 Q2
Renaissance Technologies (RenTech)'s Alector (ALEC) Holding Value Over Time
Track share changes against reported price movement
Quarterly Alector (ALEC) Trades by Renaissance Technologies (RenTech)
| Report Date | Bought/Sold (Sh.) | % Change | Qtr. End Shares | Reported Price |
|---|---|---|---|---|
| Q1 2026 | -255,959 | Reduce 16.58% | 1.29 M | $2.15 |
| Q4 2025 | +594,500 | Add 62.63% | 1.54 M | $1.56 |
| Q3 2025 | -305,700 | Reduce 24.36% | 949,150 | $2.96 |
| Q2 2025 | +220,995 | Add 21.38% | 1.25 M | $1.40 |
| Q1 2025 | +118,117 | Add 12.90% | 1.03 M | $1.23 |
| Q4 2024 | +353,988 | Add 63.02% | 915,738 | $1.89 |
| Q3 2024 | -93,300 | Reduce 14.24% | 561,750 | $4.66 |
| Q2 2024 | -20,433 | Reduce 3.02% | 655,050 | $4.54 |
| Q1 2024 | +103,500 | Add 18.09% | 675,483 | $6.02 |
| Q4 2023 | +69,780 | Add 13.89% | 571,983 | $7.98 |
| Q3 2023 | -184,880 | Reduce 26.91% | 502,203 | $6.48 |
| Q2 2023 | +37,122 | Add 5.71% | 687,083 | $0.01 |
| Q1 2023 | +58,149 | Add 9.83% | 649,961 | $0.01 |
| Q4 2022 | -128,771 | Reduce 17.87% | 591,812 | $0.01 |
| Q3 2022 | -246,000 | Reduce 25.45% | 720,583 | $9.46 |
| Q2 2022 | +260,803 | Add 36.95% | 966,583 | $10.16 |
| Q1 2022 | +432,300 | Add 158.07% | 705,780 | $14.25 |
| Q4 2021 | +273,480 | New Buy | 273,480 | $20.65 |
| Q3 2020 | -69,780 | Sold Out | 0 | $0.00 |
| Q2 2020 | +69,780 | New Buy | 69,780 | $24.43 |
Renaissance Technologies (RenTech)'s Alector Investment FAQs
Renaissance Technologies (RenTech) first purchased Alector, Inc. (ALEC) in Q2 2020, acquiring 69,780 shares, as reported in their 13F filing for that period. Note: Analysis reflects filings available since Q2 2013; earlier records may be incomplete.
Renaissance Technologies (RenTech) has held Alector, Inc. (ALEC) for 20 quarters since Q2 2020.
Renaissance Technologies (RenTech)'s largest addition to Alector, Inc. (ALEC) was in Q4 2025, adding 1,543,650 shares worth $2.41 M.
According to the latest 13F filing for Q1 2026, Renaissance Technologies (RenTech)'s firm, Renaissance Technologies LLC, owns 1,287,691 shares of Alector, Inc. (ALEC), valued at approximately $2.77 M.
As of the Q1 2026 filing, Alector, Inc. (ALEC) represents approximately 0.00% of Renaissance Technologies (RenTech)'s publicly disclosed stock portfolio, making it one of their key holdings.
Renaissance Technologies (RenTech)'s peak holding in Alector, Inc. (ALEC) was 1,543,650 shares, as reported at the end of Q4 2025.