Answer

To search for an individual company:

Capital IQ

1. In the search bar, search for a company by name or symbol, e.g., Apple or AAPL
2. In the left-hand panel, navigate to News, Events, & Filings -> Transcripts

Nexis Uni

1. Go to Advanced Search, enter company name(s) in the Search box,  e.g., Apple or AAPL
2. In the Source box, enter Fair Disclosure Wire and click search,  the FD Wire coverage began April 2001

LSEG Workspace (formerly Refinitiv Workspace)

1. In the search bar, search for a company by name or symbol, e.g., Apple or AAPL
2. Go to Event tab -> Corporate Events
3. In the Advance Events Search landing page, in the left-hand panel
   1. within the dropdown menu of Event Type -> Earnings & Corporate -> Earnings Calls/Presentations, check Earnings Conference Call
   2. within the dropdown menu of Content Type, check Transcripts
4. Apply other criteria as you need and then search

To search across multiple companies:

Capital IQ

1. Go to Research tab, navigate to Transcripts section
2. Apply your search criteria in the fields of Search Criteria, Time Frame and Keyword

LSEG Workspace (formerly Refinitiv Workspace)

1. Go to Advance Events Search app by typing ADVEV. 
2. In the Advance Events Search landing page, in the left-hand panel, 
   1. within the dropdown menu of Event Type -> Earnings & Corporate -> Earnings Calls/Presentations, check Earnings Conference Call
   2. within the dropdown menu of Content Type, check Transcripts
3. Apply other criteria as you need and then search

To bulk download transcripts

WRDS

1. Go to All Data -> Compustat - Capital IQ -> Capital IQ, select Transcripts
2. Use the web query for bulk downloading transcripts. How to Search: Ways to Use WRDS