From the Missouri Secretary of State:

UNOFFICIAL Candidate Filing List
2020 Primary Election
[….]
Ballot Placement: First day filers (2/25/2020) selected a number by random drawing to determine their placement on the primary ballot. After the first day, all candidates are placed on the ballot in order of their filing.
All Candidates and parties are listed in ballot order.
(Name, Mailing Address and Date/Time Filed as of 2/26/2020 6:03:03 a.m.)

A sampling:

Governor

Republican
Name Mailing Address Random Number Date Filed
Raleigh Ritter 4476 FIVE MILE RD SENECA MO 64865 185 2/25/2020 12:09 p.m.
Mike Parson 1458 E 464 RD BOLIVAR MO 65613 348 2/25/2020 10:44 a.m.
James W. (Jim) Neely PO BOX 343 CAMERON MO 64429 477 2/25/2020 1:09 p.m.

Democratic
Name Mailing Address Random Number Date Filed
Nicole Galloway 505 W STEWART RD COLUMBIA MO 65203 646 2/25/2020 11:14 a.m.
Jimmie Matthews 5935 LILLIAN AVE ST LOUIS MO 63136 861 2/25/2020 9:49 a.m.
Antoin Johnson 12200 BARCELONA AVE ST LOUIS MO 63138 989 2/25/2020 9:09 a.m.

Uh, where’s Eric Greitens (r)?

Attorney General

Republican
Name Mailing Address Random Number Date Filed
Eric Schmitt POST BOX 220722 KIRKWOOD MO 63122 502 2/25/2020 10:58 a.m.

Democratic
Name Mailing Address Random Number Date Filed
Rich Finneran PO BOX 592 ST LOUIS MO 63188 200 2/25/2020 12:29 p.m.
Elad Gross 5653 SOUTHWEST AVE ST LOUIS MO 63139 220 2/25/2020 8:32 a.m.

U.S. Representative – District 2

Republican
Name Mailing Address Random Number Date Filed
Ann Wagner 313 ST ANDREWS CT BALLWIN MO 63011 677 2/25/2020 8:11 a.m.

Democratic
Name Mailing Address Random Number Date Filed
Jill Schupp 418 N MOSLEY RD ST LOUIS MO 63141 553 2/25/2020 8:21 a.m.

Libertarian
Name Mailing Address Random Number Date Filed
Martin Schulte 15579 CLAYTON RD BALLWIN MO 63011 414 2/25/2020 1:10 p.m.

U.S. Representative – District 4

Republican
Name Mailing Address Random Number Date Filed
Neal Gist PO BOX 1130 LAURIE MO 65038 857 2/25/2020 9:25 a.m.

Democratic
Name Mailing Address Random Number Date Filed
Lindsey Simmons PO BOX 413 HALLSVILLE MO 65255 840 2/25/2020 9:39 a.m.

Libertarian
Name Mailing Address Random Number Date Filed
Robert E Smith 818 N MAIN ST NEVADA MO 64772 250 2/25/2020 3:43 p.m.

Where’s Vicky (r)?

U.S. Representative – District 5

Republican
Name Mailing Address Random Number Date Filed
Clay Chastain 421 LEE ST. BEDFORD VA 24523 43 2/25/2020 10:51 a.m.

Democratic
Name Mailing Address Random Number Date Filed
Emanuel Cleaver II 8217 E GREGORY BLVD KANSAS CITY MO 64133 518 2/25/2020 8:23 a.m.
Maite Salazar 4228 MONTGALL AVE KANSAS CITY MO 64130 785 2/25/2020 1:42 p.m.

U.S. Representative – District 8

Republican
Name Mailing Address Random Number Date Filed
Jason Smith PO BOX 1324 CAPE GIRARDEAU MO 63702 427 2/25/2020 8:18 a.m.

Democratic
Name Mailing Address Random Number Date Filed
Kathy Ellis 208 BARRINGTON PL FESTUS MO 63028 73 2/25/2020 10:02 a.m.

The last day for candidate filing is March 31, 2020.