X0306 4 2019-08-14 0000823094 SOTHEBYS BID 0001114673 WEIBLING DENNIS M 1334 YORK AVENUE NEW YORK NY 10021 1 Common Stock 2019-08-14 5 G 0 E 36000 0 D 25000 D Common Stock 2019-08-15 4 S 0 6000 58.2365 D 2600 I By Eagle Wings LLC Common Stock 2019-08-16 4 S 0 2600 58.0621 D 0 I By Eagle Wings LLC Common Stock 2019-08-19 4 S 0 9000 58.7011 D 16000 D The price reported is a weighted average price. The shares were sold in multiple transactions at prices ranging from $58.15 to $58.36, inclusive. The Reporting Person undertakes to provide to Sotheby's, any security holder of Sotheby's, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote. The Reporting Person, his wife and children all own outstanding interests of this limited liability company. The price reported is a weighted average price. The shares were sold in multiple transactions at prices ranging from $58.01 to $58.119, inclusive. The Reporting Person undertakes to provide to Sotheby's, any security holder of Sotheby's, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote. The price reported is a weighted average price. The shares were sold in multiple transactions at prices ranging from $58.60 to $58.75, inclusive. The Reporting Person undertakes to provide to Sotheby's, any security holder of Sotheby's, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote. /s/ David G. Schwartz as Attorney-In-Fact 2019-08-19