X0306 4 2017-05-08 0 0001374128 ENTELLUS MEDICAL INC ENTL 0001571208 WHITE ROBERT S. 3600 HOLLY LANE NORTH, SUITE 40 PLYMOUTH MN 55447 1 1 0 0 President and CEO Common Stock, $0.001 par value 2017-05-08 4 P 0 10000 12.24 A 55353 D The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $11.70 to $12.25, inclusive. The reporting person undertakes to provide to Entellus Medical, Inc., any security holder of Entellus Medical, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in this footnote (1) to this Form 4. Includes 38,000 shares that will be issued over time upon vesting pursuant to a restricted stock unit granted under the Entellus Medical, Inc. 2015 Incentive Award Plan. Includes 1,471 shares acquired under the Entellus Medical, Inc. 2015 Employee Stock Purchase Plan on June 30, 2016. /s/ Brent Moen, attorney-in-fact 2017-05-08