IDEXX LABORATORIES INC /DE — Director's Dealing 2020

May 8, 2020

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: IDEXX LABORATORIES INC /DE (IDXX)
CIK: 0000874716
Period of Report: 2020-05-06

Reporting Person: SZOSTAK M ANNE (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2020-05-06	Common Stock	G	6717	—	Disposed	0	Indirect
2020-05-06	Common Stock	G	584	—	Disposed	0	Direct
2020-05-06	Common Stock	G	7301	—	Acquired	10217	Indirect
2020-05-06	Common Stock	G	10217	—	Disposed	0	Indirect
2020-05-06	Common Stock	G	10217	—	Acquired	10217	Indirect

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2020-05-06	Deferred Stock Unit	$	A	370	Acquired		Common Stock (370)	Direct
2020-05-06	Non-Qualified Stock Option (right-to-buy)	$283.59	A	1279	Acquired	2030-05-05	Common Stock (1279)	Direct

Footnotes

F1: The reporting person is the settlor of the M. Anne Szostak Trust ("Trust"), the trustee of the Trust, has power to direct the distribution of Trust assets, and has the power to revoke or amend the Trust. The reporting person has a pecuniary interest in the shares transferred to the Trust.

F2: The reporting person is the settlor and trustee of the 2020 Szostak IDEXX GRAT (the "GRAT"). The GRAT is irrevocable, and the reporting person disclaims beneficial ownership of these shares except to the extent of her pecuniary interest therein.

F3: Each deferred stock unit represents a contingent right to receive one share of IDEXX Laboratories, Inc. common stock. Deferred stock units vest in one installment on the one year anniversary of the date of grant or on the date of the 2021 annual meeting of shareholders, whichever event is earlier, and are payable as common stock one year following the Director's resignation from the Board of Directors.

F4: Grant of option to buy shares of IDEXX Laboratories, Inc. common stock that vest in one installment on the one year anniversary of the date of grant or on the date of the 2021 annual meeting of shareholders, whichever event is earlier.

F5: Not applicable.