Today, from the Missouri Secretary of State site:

UNOFFICIAL Candidate Filing List
2018 Primary Election

U.S. Representative – District 4

Republican
Name Mailing Address Random Number Date Filed
John Webb 23906 S STATE ROUTE D CLEVELAND MO 64734 906 2/27/2018 2:28 p.m.
Vicky Hartzler 30218 S PLEASANT RIDGE RD HARRISONVILLE MO 64701 3/9/2018 1:59 p.m.

Democratic
Name Mailing Address Random Number Date Filed
Renee Hoagenson 2305 MARICOPA DR COLUMBIA MO 65201 412 2/27/2018 11:51 a.m.
Hallie J Thompson 2110 LOVEJOY LN COLUMBIA MO 65202 884 2/27/2018 1:32 p.m.

Libertarian
Name Mailing Address Random Number Date Filed
Steven Koonse 210 W LENEHER AVE LEETON MO 64761 89 2/27/2018 10:59 a.m.

[emphasis added]

I wonder what this means for open public town halls in the district? Just asking.

At the Federal Election Commission:

Missouri – House District 4
Candidate – Party – Total Receipts – Total Disbursements – Cash on Hand – Source Reports

HARTZLER, VICKY REPUBLICAN PARTY $637,471.86 $438,497.70 $561,127.91 Coverage ending: 12/31/2017
HOAGENSON, SUZANNE RENEE DEMOCRATIC PARTY $100,770.26 $49,422.28 $51,347.98 Coverage ending: 12/31/2017
WEBB, JOHN REPUBLICAN PARTY $2,705.00 $137.00 $2,786.00 Coverage ending: 12/31/2017
BOURGEOIS, JENNA MARIE MS. REPUBLICAN PARTY $494.09 $143.14 $350.95 Coverage ending: 09/30/2017
THOMPSON, HALLIE JESS DEMOCRATIC PARTY $0.00 $0.00 $0.00 No processed data this period.