| In millions, except per share items | Jun-30-23 | Mar-31-23 | Sep-30-22 | Jun-30-22 | Mar-31-22 | Dec-31-21 | Sep-30-21 | Jun-30-21 |
| | 10-Q | 10-Q | 10-Q | 10-Q | 10-Q | 10-K | 10-Q | 10-Q |
| Revenues: |
| Northwest Natural Gas Company | 220.5 | 458.9 | 110.4 | 196.3 | 343.2 | 317.1 | 89.3 | 144.6 |
| Parent Company | 237.9 | 462.4 | 116.8 | 195.0 | 350.3 | 294.1 | 101.4 | 148.9 |
| Natural Gas Distribution | 223.7 | 447.8 | 103.3 | 184.6 | 341.4 | 284.9 | 91.0 | 139.6 |
| Other Northwest Natural | 4.6 | 6.7 | 7.1 | 5.6 | 5.2 | 5.2 | 5.0 | 5.0 |
| Total revenues | 230.0 | 466.8 | 110.0 | 201.0 | 346.8 | 288.9 | 94.8 | 133.4 |
| Revenue growth [+] | 14.4% | 34.6% | 16.0% | 50.6% | 11.5% | 15.5% | 7.3% | 6.8% |
| Northwest Natural Gas Company | 12.3% | 33.7% | 23.6% | 35.8% | 11.6% | 15.0% | 7.2% | 10.2% |
| Parent Company | 22.0% | 32.0% | 15.2% | 30.9% | 10.9% | 13.0% | 8.8% | 10.3% |
| Natural Gas Distribution | 21.2% | 31.2% | 13.5% | 32.2% | 13.3% | 13.1% | 8.7% | 9.9% |
| Other Northwest Natural | -17.5% | 29.0% | 42.8% | 13.1% | -52.5% | 6.9% | 8.4% | 19.2% |
| Cost of goods sold [+] | 169.3 | 277.6 | 86.9 | 132.9 | 203.1 | 168.3 | 72.6 | 91.2 |
| Maintenance and operations costs | 66.8 | 71.8 | 50.7 | 53.2 | 57.5 | 54.7 | 47.3 | 50.0 |
| Oil & gas costs | 102.4 | 205.7 | 36.1 | 79.7 | 145.6 | 113.6 | 25.3 | 41.2 |
| Gross profit | 60.7 | 189.2 | 23.1 | 68.1 | 143.8 | 120.5 | 22.2 | 42.2 |
| Gross margin | 26.4% | 40.5% | 21.0% | 33.9% | 41.4% | 41.7% | 23.4% | 31.6% |
| Selling, general and administrative [+] | 10.9 | 14.2 | 9.6 | 9.0 | 12.1 | 9.3 | 9.1 | 8.9 |
| General and administrative | 10.9 | 14.2 | 9.6 | 9.0 | 12.1 | 9.3 | 9.1 | 8.9 |
| Other selling, general and administrative | | | | | | | | |
| Other operating expenses | 4.7 | 30.0 | -0.6 | 17.5 | 15.6 | 12.2 | -0.9 | -7.5 |
| EBITDA [+] | 45.1 | 145.0 | 14.1 | 41.6 | 116.1 | 99.0 | 14.0 | 40.8 |
| EBITDA growth | 8.4% | 24.9% | 0.4% | 2.2% | -5.5% | -2.7% | -2.1% | 17.2% |
| EBITDA margin | 19.6% | 31.1% | 12.8% | 20.7% | 33.5% | 34.3% | 14.8% | 30.6% |
| Depreciation and amortization | 31.3 | 31.5 | 29.0 | 28.1 | 28.4 | 28.9 | 28.4 | 28.1 |
| EBIT [+] | 13.8 | 113.5 | -14.9 | 13.5 | 87.6 | 70.2 | -14.4 | 12.6 |
| EBIT growth | 2.2% | 29.5% | 3.7% | 7.2% | -7.5% | -5.9% | 24.2% | 41.2% |
| EBIT margin | 6.0% | 24.3% | -13.6% | 6.7% | 25.3% | 24.3% | -15.2% | 9.5% |
| Interest expense | 19.0 | 18.3 | 13.1 | 11.6 | 11.5 | 11.2 | 11.2 | 11.0 |
| Interest expense | 19.0 | 18.3 | 13.1 | 11.6 | 11.5 | 11.2 | 11.2 | 11.0 |
| Other income (expense), net [+] | 6.9 | 26.8 | -5.1 | 0.7 | 18.0 | -4.2 | -9.3 | -2.9 |
| Environmental remediation expense | 2.1 | 5.4 | 1.0 | 2.3 | 4.7 | 3.8 | 0.8 | 1.5 |
| Other | 6.6 | 7.0 | 1.6 | 2.5 | 3.7 | -4.2 | -2.2 | -2.6 |
| Pre-tax income | 1.7 | 122.0 | -33.1 | 2.7 | 94.1 | 54.8 | -34.9 | -1.3 |
| Income taxes | 0.2 | 25.1 | -6.8 | 0.5 | 18.9 | 14.3 | -7.1 | -0.3 |
| Tax rate | 14.0% | 20.6% | 20.4% | 17.7% | 20.1% | 26.1% | 20.4% | 21.7% |
| Net income | 1.5 | 96.8 | -26.3 | 2.2 | 75.2 | 40.5 | -27.8 | -1.0 |
| Net margin | 0.6% | 20.7% | -24.0% | 1.1% | 21.7% | 14.0% | -29.3% | -0.8% |
| |
| Basic EPS [+] | $0.04 | $2.72 | ($0.75) | $0.06 | $2.41 | $1.32 | ($0.91) | ($0.03) |
| Growth | -35.2% | 12.8% | -16.7% | -295.1% | 24.0% | -12.0% | 48.1% | -80.6% |
| Diluted EPS [+] | $0.04 | $2.71 | ($0.75) | $0.06 | $2.41 | $1.32 | ($0.91) | ($0.03) |
| Growth | -35.2% | 12.6% | -16.7% | -294.8% | 23.9% | -12.0% | 48.1% | -80.6% |
| |
| Dividends per share [+] | $0.49 | $0.49 | $0.48 | $0.48 | $0.48 | $0.48 | $0.48 | $0.48 |
| Growth | 0.5% | 0.5% | 0.5% | 0.5% | 0.5% | 0.5% | 0.5% | 0.5% |
| |
| Shares outstanding (basic) [+] | 36.0 | 35.6 | 34.9 | 34.3 | 31.2 | 30.7 | 30.7 | 30.7 |
| Growth | 5.0% | 14.2% | 13.8% | 11.9% | 1.9% | 0.5% | 0.5% | 0.4% |
| Shares outstanding (diluted) [+] | 36.1 | 35.7 | 34.9 | 34.4 | 31.2 | 30.8 | 30.7 | 30.7 |
| Growth | 5.0% | 14.4% | 13.8% | 12.0% | 1.9% | 0.5% | 0.5% | 0.4% |
| |
| EBIT is a non-GAAP figure that excludes all non-recurring expenses: restructuring costs, asset impairments, IPR&D writeoffs, and other unusual charges. |