我，， (S) 名称：日期 标题： 报告发行人名称： 上一财政年度结束日期： 报告发行人类型： 最高交易市场： (参考OSC规则13-502费用中对“最高交易市场”的定义) 上市或报价证券市值： (以加元为单位-参考OSC规则13-502费用第7.1节) 股票代码 第一个指定交易 指定交易期(dd/mm/yy) (参见OSC 规则13-502Fees)该类别或系列证券在指定交易期的最后一个交易日的收盘价(dd/mm/yy) 在该证券在最高交易市场上市或报价的最后一个交易日的1/1/2023年1/1/2023年至3/31/2023年收盘价$1.470(I) 该类别或系列证券中未偿还的证券数量在 的最后一个交易日结束时 指定交易期835,381,534(Ii) 该类别或系列证券的市值(I)x(Ii)=$1,228,010,854.98(A) 第二个 指定交易期(dd/mm/yy) (参阅OSC 规则13-502费用中“指定交易期”的定义)2023年4月1日至2023年6月30日该类别或系列证券上市或报价的最后一个交易日的收盘价 最高交易市场$1.660(Iii) 在指定交易期的最后一个交易日结束时未偿还的此类证券类别或系列中的证券数量 指定交易期835,787,520(Iv) 类别或系列的市值(Iii)x(Iv)=$1,387,407,283.20(B) 第三 指定交易期(dd/mm/yy) (参阅OSC 规则13-502费用)7/1/2023年至9/30/2023年在指定交易期的最后 证券在最高交易市场上市或报价的 证券类别或系列证券的收市价$2.230(V) 在指定交易期851,532,538(Vi) 类别或系列证券的最后一个交易日结束时未偿还的证券类别或系列的证券数量(V)x(Vi)=$1,898,917,559.74(C) Denison Mines Corp.}DML 安大略省证券委员会 表格13-502F1 1级和3B级报告发行人-参与费 阿曼达·威利特 “阿曼达·威利特” 以下所述报告发行人的一名官员已审查了提交给安大略省证券委员会的本表格13-502F1(表格)，并证明据我所知，经尽合理努力，表中提供的信息完整、准确。 管理层认证 总裁副法律和公司秘书 阿曼达·威利特 2024年2月29日多伦多证券交易所 1类报告发行人3B类报告发行人

4th Specified Trading Period (dd/mm/yy) (refer to the definition of “specified trading period” under OSC Rule 13-502 Fees ) 10/1/2023 to 12/31/2023 Closing price of the security in the class or series on the last trading day of the specified trading period in which such security was listed or quoted on the highest trading marketplace $2.320 (vii) 0.7 Number of securities in the class or series of such security outstanding at the end of the last trading day of the specified trading period 890,970,371 (viii) Market value of class or series (vii) x (viii) = $2,067,051,260.72 (D) 5th Specified Trading Period (dd/mm/yy) (refer to the definition of “specified trading period” under OSC Rule 13-502 Fees ) n/a to Closing price of the security in the class or series on the last trading day of the specified trading period in which such security was listed or quoted on the highest trading marketplace (ix) Number of securities in the class or series of such security outstanding at the end of the last trading day of the specified trading period (x) Market value of class or series (ix) x (x) = $0.00 (E) Average Market Value of Class or Series (Calculate the simple average of the market value of the class or (series of security for each applicable specified trading period (i.e. A through E above)) $1,645,346,739.66 (1) Fair value of outstanding debt securities: (See paragraph 2.8(1)(b), and if applicable, paragraph 2.8(1)(c) (of OSC Rule 13-502 Fees) $0.00 (2) (Provide details of how value was determined) Capitalization for the previous financial year (1) + (2) $1,645,346,739.66 Participation Fee (For Class 1 reporting issuers, from Appendix A of OSC $59,350 Rule 13-502 Fees, select the participation fee) (For Class 3B reporting issuers, from Appendix A.1 of $0 OSC Rule 13-502 Fees, select the participation fee) Late Fee, if applicable $0.00 (As determined under section 2.7 of OSC Rule 13-502 Fees ) Total Fee Payable $59,350.00 (Participation Fee plus Late Fee) April 16, 2015 - Rule 13-502 Fees (Form 13-502F1) (Repeat the above calculation for each other class or series of equity securities of the reporting issuer (and a subsidiary pursuant to paragraph 2.8(1)(c) of OSC Rule 13-502 Fees, if applicable) that was listed or quoted on a marketplace at the end of the previous financial year)