Exhibit 99.1
July 11, 2019
| Nova Scotia Securities Commission | Securities Commission of Newfoundland and Labrador |
| Alberta Securities Commission | Saskatchewan Financial and Consumer Affairs Authority |
| Manitoba Securities Commission | New Brunswick Financial and Consumer Services Commission |
| Ontario Securities Commission | British Columbia Securities Commission |
| Superintendent of Securities, Prince Edward Island | Autorité des marchés financiers |
RE: Hydrogenics Corporation
Pursuant to a request from the above-mentioned reporting issuer, we wish to advise you of the following information in connection with its Special Meeting of Shareholders:
| Date of meeting: | August 29, 2019 |
| Record date for notice: | July 15, 2019 |
| Record date for voting: | July 15, 2019 |
| Beneficial ownership determination date: | July 15, 2019 |
| Securities entitled to notice: | Common |
| Securities entitled to vote: | Common |
| Issuer mailing directly to non-objecting beneficial owners: | No |
| Issuer will pay for objecting beneficial owner material distribution: | Yes |
| Issuer using notice-and-access for registered investors: | No |
| Issuer using notice-and-access for non-registered investors: | No |
| Notice-and-access stratification criteria: | No |
Sincerely,
Larry Calixtro
Associate Manager, Trust Central Services
