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Earnings per share | 3 Months Ended
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Mar. 31, 2026
Earnings Per Share [Abstract] |
Earnings per share | Earnings per share Basic earnings per share is computed by dividing net income or loss over the weighted average number of shares of Class A non-voting common stock ("Class A Stock") and Class B voting common stock ("Class B Stock") outstanding. Diluted earnings per share includes the weighted average number of shares of Class A Stock and Class B Stock outstanding and unvested restricted stock awards of Class A Stock using the treasury stock method. Earnings per share have been calculated as follows:
(Expressed in thousands, except number of shares and per share amounts) |  |
| For the Three Months Ended March 31,
| 2026 |  | 2025
Basic weighted average number of shares outstanding | 10,642,909 |  |  | 10,465,771 |
Net dilutive effect of share-based awards, treasury stock method (1) | — |  |  | 812,168 |
Diluted weighted average number of shares outstanding | 10,642,909 |  |  | 11,277,939 |
Net (loss) income attributable to Oppenheimer Holdings Inc. | $ | (20,578) |  |  | $ | 30,655 |
(Loss) Earnings per share attributable to Oppenheimer Holdings Inc. |  |
Basic | $ | (1.93) |  |  | $ | 2.93 |
Diluted | $ | (1.93) |  |  | $ | 2.72 |
(1) For the three months ended March 31, 2026, the diluted net loss per share computation did not include the anti-dilutive effect of 983,778 shares of Class A Stock granted under share-based compensation arrangements but not yet issued or vested. For the three months ended March 31, 2025, the diluted net income per share computation did not include the anti-dilutive effect of 211,250 shares of Class A Stock granted under share-based compensation arrangements but not yet issued or vested.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 260 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/260/tableOfContent Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-2 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-3 + Details
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