Renaissance Technologies's IRTC Position Overview
Renaissance Technologies (via Renaissance Technologies LLC) currently holds 103,900 shares of iRhythm Holdings, Inc. (IRTC) worth $18.44 M, representing 0.03% of the portfolio. First purchased in 2017-Q1, this long-term strategic position has been held for 28 quarters.
Based on 13F filings, Renaissance Technologies has maintained a strategic position in IRTC, demonstrating sustained confidence in this investment. Largest addition occurred in Q2 2021, adding 193,100 shares. Largest reduction occurred in Q4 2021, reducing 242,100 shares.
Analysis based on 13F filings available since 2013 Q2
Renaissance Technologies's iRhythm Holdings (IRTC) Holding Value Over Time
Track share changes against reported price movement
Quarterly iRhythm Holdings (IRTC) Trades by Renaissance Technologies
| Report Date | Bought/Sold (Sh.) | % Change | Qtr. End Shares | Reported Price |
|---|---|---|---|---|
| Q4 2025 | -17,500 | Reduce 14.42% | 103,900 | $177.44 |
| Q3 2025 | -19,800 | Reduce 14.02% | 121,400 | $171.99 |
| Q2 2025 | +119,100 | Add 538.91% | 141,200 | $153.96 |
| Q1 2025 | +22,100 | New Buy | 22,100 | $104.68 |
| Q4 2023 | -72,800 | Sold Out | 0 | $0.00 |
| Q3 2023 | -10,700 | Reduce 12.81% | 72,800 | $94.26 |
| Q2 2023 | +73,900 | Add 769.79% | 83,500 | $0.10 |
| Q1 2023 | -92,200 | Reduce 90.57% | 9,600 | $0.12 |
| Q4 2022 | +101,800 | New Buy | 101,800 | $0.09 |
| Q3 2022 | -16,400 | Sold Out | 0 | $0.00 |
| Q2 2022 | -2,300 | Reduce 12.30% | 16,400 | $108.05 |
| Q1 2022 | +18,700 | New Buy | 18,700 | $157.49 |
| Q4 2021 | -242,100 | Sold Out | 0 | $0.00 |
| Q3 2021 | -93,500 | Reduce 27.86% | 242,100 | $58.56 |
| Q2 2021 | +193,100 | Add 135.51% | 335,600 | $66.35 |
| Q1 2021 | +142,500 | New Buy | 142,500 | $138.86 |
| Q1 2020 | -177,500 | Sold Out | 0 | $0.00 |
| Q4 2019 | +177,500 | New Buy | 177,500 | $68.09 |
| Q2 2019 | -87,400 | Sold Out | 0 | $0.00 |
| Q1 2019 | -110,200 | Reduce 55.77% | 87,400 | $74.97 |
| Q4 2018 | +17,500 | Add 9.72% | 197,600 | $69.48 |
| Q3 2018 | -45,200 | Reduce 20.06% | 180,100 | $94.66 |
| Q2 2018 | -180,000 | Reduce 44.41% | 225,300 | $81.13 |
| Q1 2018 | +161,000 | Add 65.90% | 405,300 | $62.95 |
| Q4 2017 | +41,800 | Add 20.64% | 244,300 | $56.05 |
| Q3 2017 | -72,300 | Reduce 26.31% | 202,500 | $51.88 |
| Q2 2017 | +187,600 | Add 215.14% | 274,800 | $42.49 |
| Q1 2017 | +87,200 | New Buy | 87,200 | $37.60 |
Renaissance Technologies's iRhythm Holdings Investment FAQs
Renaissance Technologies first purchased iRhythm Holdings, Inc. (IRTC) in Q1 2017, acquiring 87,200 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 has held iRhythm Holdings, Inc. (IRTC) for 28 quarters since Q1 2017.
Renaissance Technologies's largest addition to iRhythm Holdings, Inc. (IRTC) was in Q2 2021, adding 335,600 shares worth $22.27 M.
According to the latest 13F filing for Q4 2025, Renaissance Technologies's firm, Renaissance Technologies LLC, owns 103,900 shares of iRhythm Holdings, Inc. (IRTC), valued at approximately $18.44 M.
As of the Q4 2025 filing, iRhythm Holdings, Inc. (IRTC) represents approximately 0.03% of Renaissance Technologies's publicly disclosed stock portfolio, making it one of their key holdings.
Renaissance Technologies's peak holding in iRhythm Holdings, Inc. (IRTC) was 405,300 shares, as reported at the end of Q1 2018.