X0306 4 2018-09-21 0 0001273813 ASSURED GUARANTY LTD AGO 0001724439 Chow Ling 30 WOODBOURNE AVENUE HAMILTON D0 HM08 BERMUDA 0 1 0 0 General Counsel and Secretary Common Shares 2018-09-21 4 M 0 4000 7.44 A 75737 D Common Shares 2018-09-21 4 F 0 2459 42.28 D 73278 D Common Shares 2018-09-21 4 M 0 2241 17.44 A 75519 D Common Shares 2018-09-21 4 F 0 1626 42.28 D 73893 D Options to Acquire Common Shares 7.44 2018-09-21 4 M 0 4000 0.00 D 2019-02-05 Common Shares 4000 0 D Options to Acquire Common Shares 17.44 2018-09-21 4 M 0 2241 0.00 D 2015-02-09 2019-02-09 Common Shares 2241 0 D Represents the payment of the exercise price and withholding taxes of an employee stock option through the attestation of previously owned shares. Options vested as follows: 1/3 on 02/05/2010, 1/3 on 02/05/2011 and 1/3 on 02/05/2012. All options of this tranche have been exercised. The total number of options from other tranches with different exercise prices, vesting terms and expiration dates is 12,598 (after taking into account the options exercised as reported on this Form 4). The total number of performance share units from tranches with different performance measures, performance periods and vesting dates is 9,296. /s/ Ling Chow 2018-09-24