| Sep 30, 2016 | Sep 30, 2017 | Sep 30, 2018 | Sep 30, 2019 | Sep 30, 2020 | Sep 30, 2021 | Sep 30, 2022 | Sep 30, 2023 | Sep 30, 2024 |
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| Cash and cash equivalents | 66 | 109 | 257 | 358 | 370 | 160 | 189 | 268 | 142 |
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| Due from related parties | - | - | - | - | - | - | - | 111 | 134 |
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| Prepaid and other current assets | 5 | 7 | 10 | 13 | 4 | 6 | 5 | 7 | 10 |
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| Assets held for sale | - | - | - | - | - | - | - | - | 9 |
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| Total current assets | 95 | 141 | 296 | 465 | 456 | 255 | 303 | 386 | 294 |
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| Financing Receivable, after Allowance for Credit Loss, Noncurrent | - | - | - | - | - | - | - | - | 56 |
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| Property and equipment, net of accumulated depreciation of $3,447 and $3,212, respectively | 4 | 3 | 3 | 2 | 2 | 2 | 2 | 5 | 76 |
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| Due from related parties, net of current portion | - | - | - | - | - | - | - | 7 | 9 |
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| Equity method investments | - | 12 | 7 | 7 | 7 | 39 | - | - | 24 |
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| Goodwill | 2 | 2 | 2 | 2 | 2 | - | - | - | 72 |
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| Finite-Lived Intangible Assets, Net | - | 0 | 0 | 0 | 0 | - | - | - | 20 |
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| Operating lease right of use assets | - | - | - | - | 35 | 32 | 29 | 29 | 27 |
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| Deferred tax asset | - | - | - | 26 | 24 | 19 | 17 | 18 | 15 |
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| Other Assets, Noncurrent | 181 | 172 | 163 | 153 | 144 | 134 | 125 | 115 | 106 |
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| Total assets | 338 | 384 | 504 | 668 | 690 | 498 | 542 | 582 | 700 |
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| Other Liabilities, Current | - | - | - | - | 56 | 55 | 80 | 78 | 90 |
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| Accounts payable and accrued expenses | 21 | 26 | 28 | 98 | 17 | 15 | 17 | 19 | 32 |
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| Current portion of Earnout liability | - | - | - | - | - | - | - | - | 1 |
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| Operating lease liabilities | - | - | - | - | 4 | 5 | 5 | 5 | 6 |
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| Liabilities held for sale | - | - | - | - | - | - | - | - | 5 |
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| Total current liabilities | 21 | 26 | 28 | 98 | 82 | 81 | 109 | 106 | 133 |
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| Operating Lease, Liability, Noncurrent | - | - | - | - | 32 | 29 | 26 | 25 | 22 |
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| Tax Receivable Agreement Obligations, Noncurrent | 62 | 59 | 32 | 30 | 28 | 26 | 23 | 21 | 18 |
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| Employer compensation liability, net of current portion | 8 | 8 | 8 | 9 | 8 | 14 | 15 | 7 | 9 |
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| Earnout liability, net of current portion | - | - | - | - | - | - | - | - | 11 |
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| Secured Debt | - | - | - | - | - | - | - | - | 41 |
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| Notes Payable | - | - | - | - | - | - | - | - | 45 |
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| Total liabilities | 91 | 94 | 70 | 139 | 149 | 150 | 173 | 159 | 281 |
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| Additional paid in capital | 94 | 96 | 99 | 103 | 107 | 110 | 113 | 116 | 119 |
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| Retained earnings | 45 | 87 | 183 | 257 | 286 | 322 | 356 | 413 | 436 |
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| Cumulative common distributions | 17 | 33 | 49 | 72 | 97 | 237 | 262 | 289 | 317 |
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| Total shareholders’ equity | 246 | 290 | 435 | 529 | 541 | 348 | 370 | 424 | 419 |
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| Noncontrolling interest in The RMR Group LLC | - | - | - | - | - | - | - | - | 181 |
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| Noncontrolling interest in consolidated entity | - | - | - | - | - | - | - | - | 0 |
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| Total noncontrolling interests | 125 | 140 | 202 | 240 | 245 | 153 | 163 | 184 | 182 |
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| Total equity | 246 | 290 | 435 | 529 | 541 | 348 | 370 | 424 | 419 |
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| Total liabilities and equity | 338 | 384 | 504 | 668 | 690 | 498 | 542 | 582 | 700 |
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