NOTE 13. EARNINGS PER SHARE The following table sets forth the computation of basic and diluted earnings per common share Year ended December 31, 2021 2020 2019 (common shares in thousands) (umerator (et income (loss) available (attributable) to RenaissanceRe common shareholders $ (73,421) $ 731,482 $ 712,042 Amount allocated to participating common shareholders (1) (727) (8,968) (8,545) (et income (loss) allocated to RenaissanceRe common shareholders $ (74,148) $ 722,514 $ 703,497 Denominator Denominator for basic income (loss) per RenaissanceRe common share - weighted average common shares 47,171 47,103 43,119 Per common share equivalents of non-vested shares S 75 56 Denominator for diluted income (loss) per RenaissanceRe common share - adjusted weighted average common shares and assumed conversions 47,171 47,178 43,175 (et income (loss) available (attributable) to RenaissanceRe common shareholders per common share R basic $ (1.57) $ 15.34 $ 16.32 (et income (loss) available (attributable) to RenaissanceRe common shareholders per common share R diluted $ (1.57) $ 15.31 $ 16.29 (1) Represents earnings and dividends attributable to holders of unvested shares issued pursuant to the Companys stock compensation plans. NOTE 14. RELATED PARTY TRANSACTIONS AND MAJOR CUSTOMERS Tower Hill The Company has entered into reinsurance and other arrangements with certain subsidiaries and affiliates of Tower "ill and has also entered into reinsurance arrangements with respect to business produced by the Tower "ill Companies. During 2021, the Company recorded $69.8 million ( 2020 - $55.5 million, 2019 - $39.8 million) of gross premiums written assumed from the Tower "ill Companies and its subsidiaries and affiliates. Gross premiums earned totaled $63.0 million ( 2020 - $51.4 million, 2019 - $40.7 million) and expenses incurred were $11.3 million ( 2020 - $7.9 million, 2019 - $6.1 million) for 2021. The Company had a net related outstanding receivable balance of $21.7 million as of December 31, 2021 ( 2020 - receivable of $18.3 million). During 2021, the Company assumed net claims and claim expenses of $28.5 million (2020 - assumed net claims and claim expenses of $13.2 million, 2019 - assumed net claims and claim expenses of $37.7 million) and, as of December 31, 2021, had a net reserve for claims and claim expenses of $68.0 million (2020 - $69.5 million). In addition, the Company received distributions of $15.0 million from the Tower "ill Companies during 2021 (2020 - $9.5 million, 2019 - $13.4 million). Top Layer Re During 2021, the Company received distributions from Top Layer Re of $9.3 million (2020 - $18.0 million, 2019 - $20.0 million), and recorded a management fee of $2.5 million ( 2020 - $2.4 million, 2019 - $2.3 million). The management fee reimburses the Company for services it provides to Top Layer Re. Broker Concentration During 2021, the Company received 78.0% of its gross premiums written (2020 - 79.6%, 2019 - 79.6%) from three brokers. Subsidiaries and affiliates of Aon plc, Marsh  McLennan Companies, Inc. and Arthur $. Gallagher accounted for 35.8%, 30.0% and 12.2%, respectively, of gross premiums written in 2021. F-69