In the news:

Lindsay Wise @lindsaywise
Mark Bobak’s place in Greitens’ world sparks ethics questions about a private attorney, presumably paid out of the gov’s own pocket, being involved in public policies w/o being subject to transparency or conflict-of-interest laws that apply to government officials or lobbyists.
[….]
7:26 AM – 6 May 2018

In the past, via the Missouri Ethics Commission:

C000213 MISSOURIANS FOR GIBBONS OCTOBER – COMMITTEE QUARTERLY REPORT Mark Bobak 15 Cricklewood Place Saint Louis, MO 63131 self – attorney N/A 09/22/2008 $500.00 Monetary No

C051183 FRIENDS OF PETER KINDER OCTOBER – COMMITTEE QUARTERLY REPORT Mark Bobak 15 Cricklewood Pl Saint Louis, MO 63131-3311 self N/A 09/19/2008 $500.00 Monetary No

In 2010:

C010201 SLAY FOR MAYOR OCTOBER – COMMITTEE QUARTERLY REPORT Mark T. Bobak 15 Cricklewood Place Saint Louis, MO Williams Venker & Sanders/Of Counsel N/A 09/30/2010 $2,000.00 Monetary No

C091123 CORRIGAN FOR COUNTY EXECUTIVE APRIL – COMMITTEE QUARTERLY REPORT Mark Bobak 15 Cricklewood Frontenac, MO 63131 Williams, Venker and Sanders N/A 03/25/2010 $500.00 Monetary No

C101300 CITIZENS FOR RICH MAGEE JULY – COMMITTEE QUARTERLY REPORT Mark Bobak 15 Cricklewood Place Saint Louis, MO 63131 Attorney Williams Venker N/A 06/05/2010 $500.00 Monetary No

In 2012:

C010201 SLAY FOR MAYOR October Quarterly Report Mark T. Bobak 15 Cricklewood Place Saint Louis MO 63131 Williams Venker & Sanders/Of Counsel 09/30/2012 $1,500.00 Monetary No

In 2014:

C001147 MCCULLOCH FOR PROSECUTOR COMMITTEE July Quarterly Report Mark T Bobak 15 Cricklewood Place St Louis MO 63131 Attorney 06/14/2014 $500.00 Monetary No

C001147 MCCULLOCH FOR PROSECUTOR COMMITTEE July Quarterly Report Paula M Bobak 15 Cricklewood Place St Louis MO 63131 Unknown 06/14/2014 $1,000.00 Monetary No

And then, in 2015:

C071320 SCHMITT FOR MISSOURI January Quarterly Report Mark T Bobak 15 Cricklewood Place St Louis MO 63131 Williams, Venker & Sanders/Attorney 12/01/2015 $1,000.00 Monetary No

C151053 GREITENS FOR MISSOURI April Quarterly Report Mark & Paula Bobak 15 Cricklewood Place St. Louis MO 63131 Williams Venker & Sanders/Attorney 02/25/2015 $25,000.00 Monetary No

C151053 GREITENS FOR MISSOURI July Quarterly Report Ruthellyn Bobak 910 Ridge Road Apt 408 Munster IN 46321 N/A/Homemaker 04/30/2015 $5,001.00 Monetary No

C151053 GREITENS FOR MISSOURI January Quarterly Report Paula Bobak 15 Cricklewood Place Frontenac MO 63131 Homemaker 12/30/2015 $100.00 Monetary No

C151053 GREITENS FOR MISSOURI October Quarterly Report Mark and Paula Bobak 15 Cricklewood Place St. Louis MO 63131 Williams Venker & Sanders/Attorney 09/29/2015 $1,997.71 In-Kind No

There appears to have been a contribution spike in 2015.

In 2016:

C151053 GREITENS FOR MISSOURI April Quarterly Report Chris Bobak 541 Rosedale Saint Louis MO 63112 Greitens for Missouri 03/30/2016 $5.00 Monetary No

Okay [pdf]:

In 2017:

C171131 Luetkemeyer For Senate October Quarterly Report Mark Bobak 15 Cricklewood Place St. Louis MO 63131 Williams Venker and Sanders/Attorney 09/27/2017 $1,000.00 Monetary No

Nothing yet in 2018.