RTW INVESTMENTS, LP — NATERA NTRA: Quarterly 13F Position History
RTW INVESTMENTS, LP has reported NATERA (NTRA) on 41 13F-HR filings in Pactolio's tracked window, first appearing in Q1 2016. As of Q1 2026, the position is sized at 1,250,000 shares ($250.0M market value, 2.49% of the equity book). Quarter-over-quarter share count change: 250,000 (-16.7%) .
- 1,250,000Shares Held (Latest Filing)
- $250.0MReported Market Value (Latest Filing)
- 2.49%Portfolio Weight (% of 13F Equity Book)
- 250,000Quarter-over-Quarter Share Change
- -$93.6MQuarter-over-Quarter Value Change
- 2,651,783Peak Reported Shares (Historical)
Quarterly 13F-HR Disclosure History Source: SEC 13F-HR filings, 41 quarter s
| Quarter | Shares | QoQ Share Change | Share Change (%) | Market Value | Weight | Implied Price |
|---|---|---|---|---|---|---|
| Q1 2026 | 1,250,000 | 250,000 | -16.7% | $250.0M | 2.49% | $199.99 |
| Q4 2025 | 1,500,000 | 500,000 | -25.0% | $343.6M | 3.44% | $229.09 |
| Q3 2025 | 2,000,000 | 593,645 | -22.9% | $321.9M | 3.97% | $160.97 |
| Q2 2025 | 2,593,645 | +99 | +0.0% | $438.2M | 6.24% | $168.94 |
| Q1 2025 | 2,593,546 | +223 | +0.0% | $366.8M | 5.61% | $141.41 |
| Q4 2024 | 2,593,323 | 0 | — | $410.5M | 6.21% | $158.30 |
| Q3 2024 | 2,593,323 | 0 | — | $329.2M | 4.76% | $126.95 |
| Q2 2024 | 2,593,323 | 0 | — | $280.8M | 4.35% | $108.29 |
| Q1 2024 | 2,593,323 | 0 | — | $237.2M | 3.50% | $91.46 |
| Q4 2023 | 2,593,323 | 58,460 | -2.2% | $162.4M | 2.54% | $62.64 |
| Q3 2023 | 2,651,783 | +40,000 | +1.5% | $117.3M | 2.48% | $44.25 |
| Q2 2023 | 2,611,783 | 0 | — | $127.1M | 2.42% | $48.66 |
| Q1 2023 | 2,611,783 | +2,500 | +0.1% | $145.0M | 3.02% | $55.52 |
| Q4 2022 | 2,609,283 | +400,000 | +18.1% | $104.8M | 2.14% | $40.17 |
| Q3 2022 | 2,209,283 | +87,000 | +4.1% | $96.8M | 2.23% | $43.82 |
| Q2 2022 | 2,122,283 | +205,000 | +10.7% | $75.2M | 1.94% | $35.44 |
| Q1 2022 | 1,917,283 | +55,049 | +3.0% | $78.0M | 1.61% | $40.68 |
| Q4 2021 | 1,862,234 | 0 | — | $173.9M | 2.54% | $93.39 |
| Q3 2021 | 1,862,234 | +150,000 | +8.8% | $207.5M | 3.13% | $111.44 |
| Q2 2021 | 1,712,234 | 0 | — | $194.4M | 2.93% | $113.53 |
| Q1 2021 | 1,712,234 | 0 | — | $173.9M | 2.71% | $101.54 |
| Q4 2020 | 1,712,234 | +1,465 | +0.1% | $170.4M | 2.86% | $99.52 |
| Q3 2020 | 1,710,769 | +181,641 | +11.9% | $123.6M | 2.98% | $72.24 |
| Q2 2020 | 1,529,128 | +263,003 | +20.8% | $76.2M | 2.14% | $49.86 |
| Q1 2020 | 1,266,125 | +863,172 | +214.2% | $37.8M | 1.63% | $29.86 |
| Q4 2019 | 402,953 | +115,483 | +40.2% | $13.6M | 0.52% | $33.69 |
| Q3 2019 | 287,470 | +287,470 | — | $9.4M | 0.56% | $32.80 |
| Q2 2019 | 0 | 0 | — | $0 | 0.00% | — |
| Q1 2019 | 0 | 0 | — | $0 | 0.00% | — |
| Q4 2018 | 0 | 0 | — | $0 | 0.00% | — |
| Q3 2018 | 0 | 0 | — | $0 | 0.00% | — |
| Q2 2018 | 0 | 0 | — | $0 | 0.00% | — |
| Q1 2018 | 0 | 0 | — | $0 | 0.00% | — |
| Q4 2017 | 0 | 0 | — | $0 | 0.00% | — |
| Q3 2017 | 0 | 0 | — | $0 | 0.00% | — |
| Q2 2017 | 0 | 31,693 | -100.0% | $0 | 0.00% | — |
| Q1 2017 | 31,693 | 0 | — | $281.0K | 0.07% | $8.87 |
| Q4 2016 | 31,693 | 0 | — | $371.0K | 0.14% | $11.71 |
| Q3 2016 | 31,693 | 0 | — | $352.0K | 0.11% | $11.11 |
| Q2 2016 | 31,693 | 0 | — | $382.0K | 0.13% | $12.05 |
| Q1 2016 | 31,693 | — | — | $302.0K | 0.11% | $9.53 |
Methodology & FAQ
How This Position History Is Sourced
Each row is one SEC Form 13F-HR filing disclosing this position. Share count, market value, and reported quarter are taken verbatim from the filing; portfolio weight is recomputed against the same filing's total reported equity book. Implied price-per-share is market value divided by shares — a quarter-end mark, not the manager's cost basis. See the full methodology document for the normalization rules.
When did RTW INVESTMENTS, LP first disclose a NTRA position in 13F-HR filings?
RTW INVESTMENTS, LP first reported NATERA (NTRA) on its 13F-HR filing for the period ending 2016-03-31 (Q1 2016). The position has appeared on 41 reported quarters within Pactolio's tracked window.
What was RTW INVESTMENTS, LP's most recent quarter-over-quarter share-count change in NTRA?
Between Q4 2025 and Q1 2026, RTW INVESTMENTS, LP reduced its NTRA position by 250,000 shares (-16.7%), leaving 1,250,000 shares at a market value of $250.0M.
Does the implied price-per-share represent RTW INVESTMENTS, LP's cost basis in NTRA?
No. The implied price-per-share column is the 13F-HR reported market value divided by reported share count on the filing date (end of quarter). It is a quarter-end mark, not a cost basis or transaction price. Use it as a sanity check on the value column, not as an indicator of the manager's entry or exit price.