Commitments and Contingencies

Leases

Under the office lease agreement, as amended (the “Office Lease”), with John Hancock Life Insurance Company (U.S.A.) (the “Landlord”) we lease approximately 219,000 square feet of space in the buildings at 6340 Sequence Drive, 6310 Sequence Drive and 6290 Sequence Drive. The amended Office Lease term extends through March 2022 and we have an option to renew the lease upon the expiration of the initial term for two additional five-year terms by giving notice to the Landlord prior to the end of the initial term of the lease and any extension period, if applicable. Provided we are not in default under the Office Lease and the Office Lease is still in effect, we generally have the right to terminate the lease starting at the 55^th month of the Office Lease. We have received $3.6 million of tenant improvement allowance associated with the Office Lease, which is recorded as a deferred rent obligation and amortized over the term of the lease and reflected as a reduction to rent expense. Leasehold improvements associated with the tenant improvement allowance are included in Property and equipment, net in our consolidated balance sheets. On February 1, 2016, we entered into a Sublease (the “Sublease”) with Entropic Communications, LLC with respect to the building at 6350 Sequence Drive in San Diego, California (the “6350 Building”). Under the Sublease, we have leased approximately 132,600 square feet of space in the 6350 Building. The Sublease term extends through January 2022.

On April 28, 2016, we entered into a certain Industrial Net Lease (the “Mesa Lease”) with PRA/LB, L.L.C. with respect to facilities in the building at 232 South Dobson Road in Mesa, Arizona (the “Mesa Building"). Under the Mesa Lease, we have leased approximately 148,797 square feet of space in the Mesa Building, of which approximately 78,000 square feet was available to us on May 1, 2016 and the remaining portion of the Mesa Building became available to us in January 2018. The term of the Mesa Lease extends through March 2028 with four options to extend the Mesa Lease term, each for five-year periods. The Mesa Lease arrangement involves the construction of our new manufacturing facility where we are involved in the design and construction of the leased space, including non-standard tenant improvements paid for by us. This arrangement is referred to as a build-to suit lease and for accounting purposes, we were considered the owner of the construction project during the construction period. During the second quarter of 2016, we capitalized the fair value of the Mesa Building of $6.0 million within “Property and Equipment, net,” and recorded a corresponding financing lease obligation liability of $6.0 million within “Other Liabilities” in the Consolidated Balance Sheet. We have concluded that the Mesa Lease does not qualify for “sale-leaseback” treatment due to prohibited continuing involvement, accordingly the Mesa Lease will be treated as a financing arrangement.

We have also entered into other operating lease agreements, primarily for office and warehouse space, that expire at various times through July 2026. These facility leases have annual rental increases ranging from approximately 2.5% to 4%. The difference between the straight-line expense over the term of the lease and actual amounts paid are recorded as deferred rent.

Rental obligations, excluding real estate taxes, operating costs, and tenant improvement allowances, under all lease agreements as of September 30, 2018 were as follows (in millions):



Fiscal Year Ending
Remainder of 2018	$	2.6
2019	13.8
2020	14.7
2021	15.1
2022	4.2
Thereafter	9.4
Total	$	59.8

Total rent expense for the three and nine months ended September 30, 2018 was $2.9 million and $8.6 million, compared to $2.7 million and $8.3 million for the same periods in 2017.

Litigation

On March 28, 2016, AgaMatrix, Inc. filed a patent infringement lawsuit against us in the United States District Court for the District of Oregon, asserting that certain of our products infringe certain patents held by AgaMatrix. On June 6, 2016, AgaMatrix filed a First Amended Complaint asserting the same three patents. On February 24, 2017, the Court granted AgaMatrix’s motion to substitute WaveForm Technologies, Inc. (“WaveForm”) as the new plaintiff following AgaMatrix’s transfer of the three patents to its newly formed entity. On August 25, 2016, we filed petitions for inter partes review with the Patent Trial and Appeal Board (“PTAB”) of the U.S. Patent and Trademark Office seeking a determination that two of the three asserted patents are invalid under U.S. patent law and those petitions were granted on March 6, 2017. On March 8, 2017, we filed a petition for inter partes review with the PTAB seeking a determination that the third of the three asserted patents is invalid under U.S. patent law. This petition was granted on September 15, 2017. Based on the PTAB’s orders granting these petitions, most activity in the patent infringement lawsuit against us in the District of Oregon has been stayed until the inter partes review by the PTAB is completed. The PTAB issued a Final Written Decision for each of the first two patents on February 28, 2018, where the PTAB found the majority of asserted claims from the first patent unpatentable and the remaining claims under review not unpatentable. The PTAB found all claims under review from the second patent not unpatentable. We believe the PTAB erred in finding any claims of the first two patents not unpatentable, and appealed the PTAB’s decision to the United States Court of Appeals for the Federal Circuit (“Federal Circuit”) on March 30, 2018. The PTAB issued a Final Written Decision for the third patent on September 12, 2018, where the PTAB found all claims of the third patent asserted against Dexcom in the District of Oregon litigation unpatentable. It is our position that Waveform’s assertions of infringement have no merit.

DexCom has also filed several lawsuits against AgaMatrix. DexCom filed a patent infringement lawsuit against Agamatrix in the United States District Court for the Central District of California (“C.D. Cal.”), which is currently on appeal to the Federal Circuit based on a Final Judgment of non-infringement entered by the C.D. Cal. judge on February 23, 2018. On September 15, 2017, DexCom filed a patent infringement lawsuit against AgaMatrix in the United States District Court for the District of Delaware, asserting certain single-point blood glucose monitoring products of AgaMatrix infringe two patents held by DexCom. In addition, on September 18, 2017, Dexcom filed a Complaint against AgaMatrix in the International Trade Commission (“ITC”) requesting the ITC institute an investigation and issue an order excluding certain products of AgaMatrix from importation into or sale in the United States based on AgaMatrix’s infringement of the same two patents asserted in the Delaware litigation. On September 14, 2018, AgaMatrix filed two petitions for inter partes review for each of the same two patents Dexcom asserted in the District of Delaware and the ITC.

On January 19, 2018, Arbmetrics, LLC filed a patent infringement lawsuit against us in the United States Southern District of California. On April 4, 2018, Arbmetrics filed a First Amended Complaint asserting the same patent. It is our position that Arbmetric’s assertions of infringement have no merit.

Neither the outcome of these lawsuits nor the amount and range of potential fees associated with the lawsuits can be assessed at this time. As of September 30, 2018, no amounts have been accrued in respect of these suits.

We are subject to various claims, complaints and legal actions that arise from time to time in the normal course of business, including commercial insurance, product liability and employment related matters. In addition from time to time, we may bring claims or initiate lawsuits against various third parties with respect to matters arising out of the ordinary course of our business, including commercial and employment related matters. We are subject to various claims, complaints and legal actions that arise from time to time in the normal course of business, including commercial insurance, product liability and employment related matters. In addition from time to time, we may bring claims or initiate lawsuits against various third parties with respect to matters arising out of the ordinary course of our business, including commercial and employment related matters. We do not expect that the resolution of these matters would, or will, have a material adverse effect or material impact on our consolidated financial position.

Purchase Commitments

We are party to various purchase arrangements related to our manufacturing and development activities including materials used in our CGM systems. As of September 30, 2018, we had purchase commitments with vendors totaling $126.0 million due within one year. There are no material purchase commitments due beyond one year.