Renaissance Technologies (RenTech)'s ANNX Position Overview
Renaissance Technologies (RenTech) (via Renaissance Technologies LLC) currently holds 544,300 shares of Annexon, Inc. (ANNX) worth $3.02 M, representing 0.00% of the portfolio. First purchased in 2021-Q4, this medium-term investment has been held for 18 quarters.
Based on 13F filings, Renaissance Technologies (RenTech) has maintained a strategic position in ANNX, demonstrating sustained confidence in this investment. Largest addition occurred in Q1 2025, adding 668,737 shares. Largest reduction occurred in Q2 2025, reducing 384,537 shares.
Analysis based on 13F filings available since 2013 Q2
Renaissance Technologies (RenTech)'s Annexon (ANNX) Holding Value Over Time
Track share changes against reported price movement
Quarterly Annexon (ANNX) Trades by Renaissance Technologies (RenTech)
| Report Date | Bought/Sold (Sh.) | % Change | Qtr. End Shares | Reported Price |
|---|---|---|---|---|
| Q1 2026 | -258,300 | Reduce 32.18% | 544,300 | $5.54 |
| Q4 2025 | +49,021 | Add 6.51% | 802,600 | $5.02 |
| Q3 2025 | -24,321 | Reduce 3.13% | 753,579 | $3.05 |
| Q2 2025 | -384,537 | Reduce 33.08% | 777,900 | $2.40 |
| Q1 2025 | +668,737 | Add 135.45% | 1.16 M | $1.93 |
| Q4 2024 | +92,300 | Add 22.99% | 493,700 | $5.13 |
| Q3 2024 | -182,800 | Reduce 31.29% | 401,400 | $5.92 |
| Q2 2024 | -87,000 | Reduce 12.96% | 584,200 | $4.90 |
| Q1 2024 | +187,000 | Add 38.62% | 671,200 | $7.17 |
| Q4 2023 | -77,110 | Reduce 13.74% | 484,200 | $4.54 |
| Q3 2023 | +139,110 | Add 32.95% | 561,310 | $2.36 |
| Q2 2023 | +65,100 | Add 18.23% | 422,200 | $0.00 |
| Q1 2023 | +47,000 | Add 15.16% | 357,100 | $0.00 |
| Q4 2022 | -20,100 | Reduce 6.09% | 310,100 | $0.01 |
| Q3 2022 | -29,700 | Reduce 8.25% | 330,200 | $6.18 |
| Q2 2022 | -236,629 | Reduce 39.67% | 359,900 | $3.77 |
| Q1 2022 | +495,629 | Add 491.21% | 596,529 | $2.73 |
| Q4 2021 | +100,900 | New Buy | 100,900 | $11.49 |
Renaissance Technologies (RenTech)'s Annexon Investment FAQs
Renaissance Technologies (RenTech) first purchased Annexon, Inc. (ANNX) in Q4 2021, acquiring 100,900 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 Annexon, Inc. (ANNX) for 18 quarters since Q4 2021.
Renaissance Technologies (RenTech)'s largest addition to Annexon, Inc. (ANNX) was in Q1 2025, adding 1,162,437 shares worth $2.24 M.
According to the latest 13F filing for Q1 2026, Renaissance Technologies (RenTech)'s firm, Renaissance Technologies LLC, owns 544,300 shares of Annexon, Inc. (ANNX), valued at approximately $3.02 M.
As of the Q1 2026 filing, Annexon, Inc. (ANNX) 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 Annexon, Inc. (ANNX) was 1,162,437 shares, as reported at the end of Q1 2025.