Every year the IATSE Local 13 Retirement Plan & Trust is required to file a form called a 5500 to the Department of Labor.
To find those forms, open the following site in a new window:
Skip the top right search box and instead scroll down to where you will see Plan Name.
Enter I.A.T.S.E. Local 13 Retirement Plan & Trust for the Plan Name.
Then scroll further down and choose the Search button found at the bottom of the page.
(Note there are two ways to search buttons on this page, and only the second one works for this type of search.)