I'm listening to the streaming edition of the WLS feed, and the ads are different. I know this b/c I contacted The Scottish Plumber about their ad on Monday, but they had asked to have it pulled from the air on the previous Thursday. They contacted the station and have corrected the problem.
That said, this isn't a complete list, but I did try to listen when I wasn't busy. There were a lot of PSAs and promos for other shows.
TL:DR, the "brand" advertisers (instead of direct-response hucksters)
Service Masters 800-954-9444
Rogers Memorial Hospital 800-767-4411
11:47 Gingrich SuperPAC (didn't bother taking down info, we're not getting rid of THEM).
11:48 Lear Capital 800-957-4653
11:48 PSA ARHQ.gov
---- in the "news" segment, companies here don't think of their ads being "on Limbaugh" but it's pretty much a smoke screen.
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11:56 Service Master 800-954-9444 (also a banner ad on the WLS home page)
11:57 Olivet Nazerine University 877-654-3839
11:58 WLSAM "app" to "Stay in touch with Rush." For a Cumulus station, they sure have a hard-on for Rush.
12:00 PSA
12:01 PSA
12:04 Trend Capital Mgrs 800-452-3031
12:05 Olivet Nazerine University 877-654-3839
12:06 Rogers Memorial Hospital rogershospital.com 800-767-4411
12:24 Rogers again
12:25 Promo for Rush
12;48 station Promo
12:50 PSA
13:26 Service Master 800-954-9444
13:27 Trend Capital Mgrs 800-452-3031
13:27 PSA
13:28 WLSAM promo
Rush leads back in with INXS music.
Unintentional funny: I'm tempted to give Rogers a pass, since they lead their ad in as a "Mental Health Awareness Minute" -- something that is DESPERATELY needed among Rush's audience.