Early history The station first signed on the air on August 1, 2009, prior to signing on KRBK, Koplar Communications served as the founding owner of
KPLR-TV in
St. Louis—which it sold to
ACME Communications in 1997 (it is now a sister station to KRBK)—and formerly owned
KMAX-TV in
Sacramento—which once bore the KRBK-TV call letters and which Koplar sold to
Pappas Telecasting in 1994 (it is now owned by
CBS News and Stations). It immediately became the MyNetworkTV affiliate for the Ozarks. At the time KRBK signed on, MyNetworkTV programming had not been available in the
market for several months, after
Harrison, Arkansas–based
KWBM (channel 31) switched to
Daystar upon being sold to the network as part of
Equity Media Holdings's auction of its television stations. The station originally branded as "KRBK-HD". KRBK's transmitter was originally plotted to be located halfway between Springfield and
Jefferson City in northern
Laclede County, giving it
rimshot (Grade B) signals within Springfield and Jefferson City. This is possible because Osage Beach spills into both
Camden and
Miller counties, and is thus split between the two markets. Most of the city is in Camden County, part of the Springfield market. However, a small sliver in the north is in Miller County, part of the
Columbia–Jefferson City market. The transmitter was later moved to
Eldridge, in northeastern Laclede County, firmly in the Springfield market.
As a Fox affiliate Fox announced on June 20, 2011, that it would end its affiliation with KSFX-TV. That station's owner,
Nexstar Broadcasting Group, had earlier lost the Fox affiliation for a station in Indiana following a dispute with the network over
retransmission consent fees that had led contract renewal talks to drag on for more than a year. KRBK was announced as the replacement affiliate. and began broadcasting Fox programming on September 1. In spite of becoming a Fox affiliate, KRBK's signal did not serve the entire market. Station management claimed that 82% of viewers could immediately watch KRBK through cable or satellite. At the time, KRBK was in the midst of installing a five-transmitter
single frequency network to broadcast its signal throughout the market. On September 8, 2014, MyNetworkTV programming moved from KRBK to KOZL. On that same date, KRBK rebranded as "Fox 5", in reference to its primary channel position in the market on
Mediacom's Springfield-area system and on other local
cable and satellite providers within the Springfield market; the rollout of the branding also included a logo based on that of the Fox owned-and-operated stations as well as the network's
San Diego affiliate
KSWB-TV (which also brands as "Fox 5", but uses its former UHF analog allocation of channel 69 as its virtual channel).
Sale to Nexstar Media Group On August 2, 2018, Nexstar announced its intent to acquire KRBK from Koplar Communications for $16.45 million; the move marked Koplar's second retirement from television station ownership. Nexstar concurrently assumed the station's operations through a
time brokerage agreement that took effect the day prior. The transaction resulted in the formation of a virtual
triopoly with Nexstar-owned KOZL-TV—putting KRBK under common ownership with the station from which it assumed the Fox affiliation seven years earlier—and
CBS affiliate
KOLR (channel 10), which Nexstar manages through a local marketing agreement with
Mission Broadcasting. Subsequently, on October 22, KRBK's operations were integrated into KOZL/KOLR's studio facilities on East Division Street (near the Webster Park/Shady Dell subdivision); the station also changed its branding to "Ozarks Fox", utilizing a logo similar in resemblance to that used since 2012 by Nexstar-operated/Mission-owned Fox affiliate
KJTL in
Wichita Falls, Texas. The sale was finalized on November 1. The arrangement—including the preceding time brokerage agreement—placed KRBK in the unusual position of being the senior partner as a Fox-affiliated station in a virtual triopoly involving a CBS affiliate (in most virtual or legal operational arrangements involving a Fox affiliate and a Big Three-affiliated station, the Fox station normally serves as the junior partner). ==News operation==