RTW INVESTMENTS, LP: NATERA (NTRA): Quarterly 13F Position History
As of Q1 2026, RTW INVESTMENTS, LP reported 1,250,000 shares of NATERA (NTRA), worth $250.0M and representing 2.5% of its 13F equity book. Quarter-over-quarter share count change: 250,000 (-16.7%) . The position first appeared in Q1 2016 and has been disclosed across 41 13F-HR filings in Pactolio's tracked window.
- 1,250,000Shares Held (Latest Filing)
- $250.0MReported Market Value (Latest Filing)
- 2.5%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 | 2.5% | $200.0 |
| Q4 2025 | 1,500,000 | 500,000 | -25.0% | $343.6M | 3.4% | $229.1 |
| Q3 2025 | 2,000,000 | 593,645 | -22.9% | $321.9M | 4.0% | $161.0 |
| Q2 2025 | 2,593,645 | +99 | +0.0% | $438.2M | 6.2% | $168.9 |
| Q1 2025 | 2,593,546 | +223 | +0.0% | $366.8M | 5.6% | $141.4 |
| Q4 2024 | 2,593,323 | 0 | — | $410.5M | 6.2% | $158.3 |
| Q3 2024 | 2,593,323 | 0 | — | $329.2M | 4.8% | $127.0 |
| Q2 2024 | 2,593,323 | 0 | — | $280.8M | 4.3% | $108.3 |
| Q1 2024 | 2,593,323 | 0 | — | $237.2M | 3.5% | $91.5 |
| Q4 2023 | 2,593,323 | 58,460 | -2.2% | $162.4M | 2.5% | $62.6 |
| Q3 2023 | 2,651,783 | +40,000 | +1.5% | $117.3M | 2.5% | $44.3 |
| Q2 2023 | 2,611,783 | 0 | — | $127.1M | 2.4% | $48.7 |
| Q1 2023 | 2,611,783 | +2,500 | +0.1% | $145.0M | 3.0% | $55.5 |
| Q4 2022 | 2,609,283 | +400,000 | +18.1% | $104.8M | 2.1% | $40.2 |
| Q3 2022 | 2,209,283 | +87,000 | +4.1% | $96.8M | 2.2% | $43.8 |
| Q2 2022 | 2,122,283 | +205,000 | +10.7% | $75.2M | 1.9% | $35.4 |
| Q1 2022 | 1,917,283 | +55,049 | +3.0% | $78.0M | 1.6% | $40.7 |
| Q4 2021 | 1,862,234 | 0 | — | $173.9M | 2.5% | $93.4 |
| Q3 2021 | 1,862,234 | +150,000 | +8.8% | $207.5M | 3.1% | $111.4 |
| Q2 2021 | 1,712,234 | 0 | — | $194.4M | 2.9% | $113.5 |
| Q1 2021 | 1,712,234 | 0 | — | $173.9M | 2.7% | $101.5 |
| Q4 2020 | 1,712,234 | +1,465 | +0.1% | $170.4M | 2.9% | $99.5 |
| Q3 2020 | 1,710,769 | +181,641 | +11.9% | $123.6M | 3.0% | $72.2 |
| Q2 2020 | 1,529,128 | +263,003 | +20.8% | $76.2M | 2.1% | $49.9 |
| Q1 2020 | 1,266,125 | +863,172 | +214.2% | $37.8M | 1.6% | $29.9 |
| Q4 2019 | 402,953 | +115,483 | +40.2% | $13.6M | 0.5% | $33.7 |
| Q3 2019 | 287,470 | +287,470 | — | $9.4M | 0.6% | $32.8 |
| Q2 2019 | 0 | 0 | — | $0 | 0.0% | — |
| Q1 2019 | 0 | 0 | — | $0 | 0.0% | — |
| Q4 2018 | 0 | 0 | — | $0 | 0.0% | — |
| Q3 2018 | 0 | 0 | — | $0 | 0.0% | — |
| Q2 2018 | 0 | 0 | — | $0 | 0.0% | — |
| Q1 2018 | 0 | 0 | — | $0 | 0.0% | — |
| Q4 2017 | 0 | 0 | — | $0 | 0.0% | — |
| Q3 2017 | 0 | 0 | — | $0 | 0.0% | — |
| Q2 2017 | 0 | 31,693 | -100.0% | $0 | 0.0% | — |
| Q1 2017 | 31,693 | 0 | — | $281.0K | 0.1% | $8.9 |
| Q4 2016 | 31,693 | 0 | — | $371.0K | 0.1% | $11.7 |
| Q3 2016 | 31,693 | 0 | — | $352.0K | 0.1% | $11.1 |
| Q2 2016 | 31,693 | 0 | — | $382.0K | 0.1% | $12.1 |
| Q1 2016 | 31,693 | — | — | $302.0K | 0.1% | $9.5 |
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.