Renaissance Technologies (RenTech)'s INSP Position Overview
Renaissance Technologies (RenTech) (via Renaissance Technologies LLC (Rentech)) currently holds 410,768 shares of Inspire Medical Systems, Inc. (INSP) worth $37.89 M, representing 0.06% of the portfolio. First purchased in 2019-Q2, this long-term strategic position has been held for 27 quarters.
Based on 13F filings, Renaissance Technologies (RenTech) has maintained a strategic position in INSP, demonstrating sustained confidence in this investment. Largest addition occurred in Q4 2025, adding 255,768 shares. Largest reduction occurred in Q4 2023, reducing 201,800 shares.
Analysis based on 13F filings available since 2013 Q2
Renaissance Technologies (RenTech)'s Inspire Medical Systems (INSP) Holding Value Over Time
Track share changes against reported price movement
Quarterly Inspire Medical Systems (INSP) Trades by Renaissance Technologies (RenTech)
| Report Date | Bought/Sold (Sh.) | % Change | Qtr. End Shares | Reported Price |
|---|---|---|---|---|
| Q4 2025 | +255,768 | Add 165.01% | 410,768 | $92.23 |
| Q3 2025 | +28,200 | Add 22.24% | 155,000 | $74.20 |
| Q2 2025 | -63,900 | Reduce 33.51% | 126,800 | $129.77 |
| Q1 2025 | +54,000 | Add 39.50% | 190,700 | $159.28 |
| Q4 2024 | +36,200 | Add 36.02% | 136,700 | $185.38 |
| Q3 2024 | +26,900 | Add 36.55% | 100,500 | $211.05 |
| Q2 2024 | -36,000 | Reduce 32.85% | 73,600 | $133.83 |
| Q1 2024 | -4,000 | Reduce 3.52% | 109,600 | $214.79 |
| Q4 2023 | -201,800 | Reduce 63.98% | 113,600 | $203.43 |
| Q3 2023 | +58,300 | Add 22.68% | 315,400 | $198.44 |
| Q2 2023 | +46,100 | Add 21.85% | 257,100 | $0.32 |
| Q1 2023 | +170,200 | Add 417.16% | 211,000 | $0.23 |
| Q4 2022 | +24,300 | Add 147.27% | 40,800 | $0.25 |
| Q3 2022 | +16,500 | New Buy | 16,500 | $177.39 |
| Q2 2022 | -37,700 | Sold Out | 0 | $0.00 |
| Q1 2022 | +6,600 | Add 21.22% | 37,700 | $256.68 |
| Q4 2021 | +31,100 | New Buy | 31,100 | $230.06 |
| Q3 2021 | -43,439 | Sold Out | 0 | $0.00 |
| Q2 2021 | +43,439 | New Buy | 43,439 | $193.26 |
| Q1 2021 | -109,700 | Sold Out | 0 | $0.00 |
| Q4 2020 | +23,600 | Add 27.41% | 109,700 | $188.09 |
| Q3 2020 | -77,500 | Reduce 47.37% | 86,100 | $129.05 |
| Q2 2020 | -113,700 | Reduce 41.00% | 163,600 | $87.02 |
| Q1 2020 | +201,000 | Add 263.43% | 277,300 | $60.28 |
| Q4 2019 | -4,100 | Reduce 5.10% | 76,300 | $74.21 |
| Q3 2019 | -400 | Reduce 0.50% | 80,400 | $61.02 |
| Q2 2019 | +80,800 | New Buy | 80,800 | $60.66 |
Renaissance Technologies (RenTech)'s Inspire Medical Systems Investment FAQs
Renaissance Technologies (RenTech) first purchased Inspire Medical Systems, Inc. (INSP) in Q2 2019, acquiring 80,800 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 Inspire Medical Systems, Inc. (INSP) for 27 quarters since Q2 2019.
Renaissance Technologies (RenTech)'s largest addition to Inspire Medical Systems, Inc. (INSP) was in Q4 2025, adding 410,768 shares worth $37.89 M.
According to the latest 13F filing for Q4 2025, Renaissance Technologies (RenTech)'s firm, Renaissance Technologies LLC (Rentech), owns 410,768 shares of Inspire Medical Systems, Inc. (INSP), valued at approximately $37.89 M.
As of the Q4 2025 filing, Inspire Medical Systems, Inc. (INSP) represents approximately 0.06% of Renaissance Technologies (RenTech)'s publicly disclosed stock portfolio, making it one of their key holdings.
Renaissance Technologies (RenTech)'s peak holding in Inspire Medical Systems, Inc. (INSP) was 410,768 shares, as reported at the end of Q4 2025.