Pennant Investors, LP: ANTERO RESOURCES CORP (AR): Quarterly 13F Position History
As of Q1 2026, Pennant Investors, LP reported 480,000 shares of ANTERO RESOURCES CORP (AR), worth $20.4M and representing 5.6% of its 13F equity book. Quarter-over-quarter share count change: 50,000 (-9.4%) . The position first appeared in Q3 2018 and has been disclosed across 31 13F-HR filings in Pactolio's tracked window.
- 480,000Shares Held (Latest Filing)
- $20.4MReported Market Value (Latest Filing)
- 5.6%Portfolio Weight (% of 13F Equity Book)
- 50,000Quarter-over-Quarter Share Change
- +$2.1MQuarter-over-Quarter Value Change
- 3,250,000Peak Reported Shares (Historical)
Quarterly 13F-HR Disclosure History Source: SEC 13F-HR filings, 31 quarter s
| Quarter | Shares | QoQ Share Change | Share Change (%) | Market Value | Weight | Implied Price |
|---|---|---|---|---|---|---|
| Q1 2026 | 480,000 | 50,000 | -9.4% | $20.4M | 5.6% | $42.4 |
| Q4 2025 | 530,000 | 131,230 | -19.8% | $18.3M | 4.4% | $34.5 |
| Q3 2025 | 661,230 | 48,000 | -6.8% | $22.2M | 6.0% | $33.6 |
| Q2 2025 | 709,230 | 65,500 | -8.5% | $28.6M | 8.5% | $40.3 |
| Q1 2025 | 774,730 | 320,575 | -29.3% | $31.3M | 9.4% | $40.4 |
| Q4 2024 | 1,095,305 | 30,695 | -2.7% | $38.4M | 11.4% | $35.0 |
| Q3 2024 | 1,126,000 | +290,000 | +34.7% | $32.3M | 9.6% | $28.6 |
| Q2 2024 | 836,000 | 297,000 | -26.2% | $27.3M | 7.4% | $32.6 |
| Q1 2024 | 1,133,000 | +220,000 | +24.1% | $32.9M | 9.1% | $29.0 |
| Q4 2023 | 913,000 | 0 | — | $20.7M | 6.4% | $22.7 |
| Q3 2023 | 913,000 | 137,000 | -13.0% | $23.2M | 8.8% | $25.4 |
| Q2 2023 | 1,050,000 | +50,000 | +5.0% | $24.2M | 8.6% | $23.0 |
| Q1 2023 | 1,000,000 | +320,000 | +47.1% | $23.1M | 9.6% | $23.1 |
| Q4 2022 | 680,000 | 0 | — | $21.1M | 10.6% | $31.0 |
| Q3 2022 | 680,000 | +30,000 | +4.6% | $20.8M | 11.9% | $30.5 |
| Q2 2022 | 650,000 | 350,000 | -35.0% | $19.9M | 8.6% | $30.7 |
| Q1 2022 | 1,000,000 | +100,000 | +11.1% | $30.5M | 12.2% | $30.5 |
| Q4 2021 | 900,000 | 0 | — | $15.8M | 5.5% | $17.5 |
| Q3 2021 | 900,000 | 0 | — | $16.9M | 5.2% | $18.8 |
| Q2 2021 | 900,000 | 210,000 | -18.9% | $13.5M | 3.4% | $15.0 |
| Q1 2021 | 1,110,000 | 1,040,000 | -48.4% | $11.3M | 3.5% | $10.2 |
| Q4 2020 | 2,150,000 | 799,000 | -27.1% | $11.7M | 3.8% | $5.5 |
| Q3 2020 | 2,949,000 | 265,000 | -8.2% | $8.1M | 2.9% | $2.8 |
| Q2 2020 | 3,214,000 | 36,000 | -1.1% | $8.2M | 3.5% | $2.5 |
| Q1 2020 | 3,250,000 | +280,000 | +9.4% | $2.3M | 1.0% | $0.7 |
| Q4 2019 | 2,970,000 | +770,000 | +35.0% | $8.5M | 3.3% | $2.9 |
| Q3 2019 | 2,200,000 | +900,000 | +69.2% | $6.6M | 2.4% | $3.0 |
| Q2 2019 | 1,300,000 | 250,000 | -16.1% | $7.2M | 3.3% | $5.5 |
| Q1 2019 | 1,550,000 | 1,130,000 | -42.2% | $13.7M | 5.7% | $8.8 |
| Q4 2018 | 2,680,000 | +1,680,000 | +168.0% | $25.2M | 10.5% | $9.4 |
| Q3 2018 | 1,000,000 | — | — | $17.7M | 6.6% | $17.7 |
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 Pennant Investors, LP first disclose a AR position in 13F-HR filings?
Pennant Investors, LP first reported ANTERO RESOURCES CORP (AR) on its 13F-HR filing for the period ending 2018-09-30 (Q3 2018). The position has appeared on 31 reported quarters within Pactolio's tracked window.
What was Pennant Investors, LP's most recent quarter-over-quarter share-count change in AR?
Between Q4 2025 and Q1 2026, Pennant Investors, LP reduced its AR position by 50,000 shares (-9.4%), leaving 480,000 shares at a market value of $20.4M.
Does the implied price-per-share represent Pennant Investors, LP's cost basis in AR?
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.