@Todd Dexheimer and @Antoine Martel - accurate and useful information with no sales pitch.
2. The Multifamily Executive conference, which is held every fall in Las Vegas. I have gone to this one every year for the last 5 or 6 years. It is largely what it sounds like - a collection of generally higher level people from brokerages, management companies, apartment developers, vendors, etc. Great speakers, good market intel, and decent networking. An industry event with zero sales pitch or gurus. Not as many small to medium owners/investors though:
http://www.cvent.com/events/2017-multifamily-execu...
3. National Multifamily Housing Council (NMHC) annual meeting. This is the granddaddy of them all when it comes to networking with brokers and other medium to large owners. Another one I attend almost every year. It's like speed dating for investors and brokers. Most people - myself included - hop from one broker meeting to the next. In one day I can get face to face with 12 brokers from across the entire area I invest, and have bought off market deals shown to me at this conference. Downside: membership in NMHC is $5k/year, and that's before you pay for the conference. However, you might be able to get someone to sponsor you for a networking only pass which is usually only $400 and is all you really want anyways. Also, a fair number of people just show up, network, and don't attend any of the official stuff that membership is required for...but you didn't hear that from me ;-)
https://www.nmhc.org/Meetings/2018-NMHC-Annual-Mee...
4. Middle-Market Multifamily Forum. I have not personally attended this but have heard other investors speak well of it. Based on the name, it sounds like it has potential as well:
https://www.imn.org/real-estate/conference/Middle-...
5. Dave Lindahl's Apartment Riches Bootcamp. Ok, yes this is a guru's course, and there will be some upselling. However, a couple of years ago he did it here in LA, so I went out of sheer curiosity since it was in my backyard. I had already bought 1,200 units at that point, so I wasn't expecting to have any major breakthroughs. I will say that 90% of the time was spent delivering actual content, and the information presented, in my opinion, was accurate. It is also a great place to network with like minded people and find potential investors, partners, sponsors, etc. I will say I have not heard good things about the coaching program though,so proabablt best to stay away from that:
https://www.reiclub.com/products/475
6. Finally, the two @Jeff Greenberg mentioned I have heard good things about as well, and I listen to those guy's podcasts. I have not personally been to the conferences.
There are others, but this is a start. I hope this helps!
Andrew