X0306 4 2016-01-14 0000907562 DYAX CORP DYAX 0001134365 MIGAUSKY GEORGE V C/O DYAX CORP. 55 NETWORK DRIVE BURLINGTON MA 01803-2756 0 1 0 0 EVP & Chief Financial Officer Common Stock 2016-01-14 4 M 0 42734 2.39 A 405698 D Common Stock 2016-01-14 4 M 0 87729 3.22 A 493427 D Common Stock 2016-01-14 4 M 0 50007 3.00 A 543434 D Common Stock 2016-01-14 4 M 0 91042 1.48 A 634476 D Common Stock 2016-01-14 4 M 0 39999 2.06 A 674475 D Common Stock 2016-01-14 4 M 0 15000 10.20 A 689475 D Common Stock 2016-01-14 4 M 0 62500 15.23 A 751975 D Common Stock 15000 I By Trust Stock Option (right to buy) 2.39 2016-01-14 4 M 0 42734 0 D 2019-02-11 Common Stock 42734 0 D Stock Option (right to buy) 3.22 2016-01-14 4 M 0 87729 0 D 2020-02-10 Common Stock 87729 0 D Stock Option (right to buy) 3.00 2016-01-14 4 M 0 50007 0 D 2023-02-07 Common Stock 50007 37916 D Stock Option (right to buy) 1.48 2016-01-14 4 M 0 91042 0 D 2022-02-24 Common Stock 91042 3958 D Stock Option (right to buy) 2.06 2016-01-14 4 M 0 39999 0 D 2018-08-06 Common Stock 39999 0 D Stock Option (right to buy) 10.20 2016-01-14 4 M 0 15000 0 D 2024-02-27 Common Stock 15000 63912 D Stock Option (right to buy) 15.23 2016-01-14 4 M 0 62500 0 D 2025-02-18 Common Stock 62500 228388 D Shares are held in trusts, of which Mr. Migausky is the trustee, for the benefit of each of Mr. Migausky's children. Mr. Migausky disclaims beneficial ownership of these shares except to the extent of his pecuniary interest therein. The options became fully exercisable on February 11, 2013. The options became fully exercisable on February 10, 2014. The options become exercisable in 48 substantially equal installments at the end of each monthly anniversary of the date of grant, February 7, 2013. The options become exercisable in 48 substantially equal installments at the end of each monthly anniversary of the date of grant, February 24, 2012. The options became fully exercisable on June 20, 2014. The options become exercisable in 48 substantially equal installments at the end of each monthly anniversary of the date of grant, February 27, 2014. The options become exercisable in 48 substantially equal installments at the end of each monthly anniversary of the date of grant, February 18, 2015. /s/ Stacie S. Aarestad as attorney-in-fact 2016-01-19