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EX-31.2 - EXHIBIT 31.2 CERTIFICATION BY CFO PURSUANT TO RULE 13A-14(A) OR 15D-14(A) - Knight-Swift Transportation Holdings Inc.knx-ex31212312020.htm
EX-32.2 - EXHIBIT 32.2 CERTIFICATION BY CFO PURSUANT TO 18 U.S.C. SECTION 1350 - Knight-Swift Transportation Holdings Inc.knx-ex32212312020.htm
EX-32.1 - EXHIBIT 32.1 CERTIFICATION BY CEO PURSUANT TO 18 USC SECTION 1350 - Knight-Swift Transportation Holdings Inc.knx-ex32112312020.htm
EX-31.1 - EXHIBIT 31.1 CERTIFICATION BY CEO PURSUANT TO RULE 13A-14(A) OR 15D-14(A) - Knight-Swift Transportation Holdings Inc.knx-ex31112312020.htm
EX-23.1 - EXHIBIT 23.1 CONSENT OF GRANT THORNTON LLP - Knight-Swift Transportation Holdings Inc.knx-ex23112312020.htm
EX-10.46 - FORM OF TARGET PU AWARD NOTICE (SHARE SETTLED) - Knight-Swift Transportation Holdings Inc.knx-ex104612312020.htm
EX-10.45 - FIRST AMENDMENT TO CREDIT FACILITY, DATED OCTOBER 2, 2020 - Knight-Swift Transportation Holdings Inc.knx-ex104512312020.htm
EX-4.1 - EXHIBIT 4.1 DESCRIPTION OF REGISTRANT'S SERVICES - Knight-Swift Transportation Holdings Inc.knx-ex4112312020.htm
10-K - 10-K - Knight-Swift Transportation Holdings Inc.knx-20201231.htm

Exhibit 21.1
SUBSIDIARIES OF KNIGHT-SWIFT TRANSPORTATION HOLDINGS INC.
1.Swift Transportation Co., LLC, a Delaware limited liability company
2.Swift Transportation Co. of Arizona, LLC, a Delaware limited liability company
3.Swift Leasing Co., LLC, a Delaware limited liability company
4.Sparks Finance, LLC, a Delaware limited liability company
5.Interstate Equipment Leasing, LLC, a Delaware limited liability company
6.Common Market Equipment, LLC, a Delaware limited liability company
7.Swift Transportation Co. of Virginia, LLC, a Delaware limited liability company
8.Swift Transportation Services, LLC, a Delaware limited liability company
9.M.S. Carriers, LLC, a Delaware limited liability company
10.Swift Logistics, S.A. de C.V., a Mexican corporation
11.Trans-Mex, Inc., S.A. de C.V., a Mexican corporation
12.Mohave Transportation Insurance Co., Inc., an Arizona corporation
13.Swift Intermodal, LLC, a Delaware limited liability company
14.Swift International S.A. de C.V. Inc., a Mexican corporation
15.TMX Administración, S.A. de C.V. Inc., a Mexican corporation
16.Swift Receivables Company II, LLC, a Delaware limited liability company
17.Red Rock Risk Retention Group, Inc., an Arizona corporation
18.Swift Academy LLC, a Delaware limited liability company
19.Swift Services Holdings, Inc., a Delaware corporation
20.Swift Logistics, LLC, a Delaware limited liability company
21.Central Refrigerated Transportation, LLC, a Delaware limited liability company
22.Swift Refrigerated Service, LLC, a Delaware limited liability company
23.Central Leasing, LLC, a Delaware limited liability company
24.Swift Warehousing, LLC, a Delaware limited liability company
25.Swift Freight Forwarding, LLC, a Delaware limited liability company
26.National Tractor Trailer School, Inc., a New York corporation
27.CDL Career Financing, LLC, a Delaware limited liability company
27.Knight Refrigerated, LLC, an Arizona limited liability company
28.Knight Logistics LLC, an Arizona limited liability company
29.Knight Transportation Services, Inc., an Arizona corporation
30.Knight Truck & Trailer Sales, LLC, an Arizona limited liability company
31.Quad K, LLC, an Arizona limited liability company
32.Iron Maintenance LLC, an Arizona limited liability company
33.Squire Transportation, LLC, an Arizona limited liability company
34.Knight Capital Growth, LLC, an Arizona limited liability company
35.Knight Port Services, LLC, an Arizona limited liability company
36.Kold Trans LLC, an Arizona limited liability company
37.Barr-Nunn Transportation LLC., an Iowa limited liability company
38.Barr-Nunn Logistics, Inc., an Iowa corporation
39.Sturgeon Equipment, Inc., an Iowa corporation
40.Knight Transportation, Inc., an Arizona corporation (Knight’s former parent)
41.Knight Air LLC, an Arizona limited liability company
42.Knight 101 LLC, an Arizona limited liability company
43.Strehl, LLC, an Arizona limited liability company
44.Abilene Motor Express, LLC., a Virginia limited liability company
45.AMX Leasing & Logistics, LLC, a Virginia limited liability company
46.AT Services, LLC, a Virginia limited liability company
Pursuant to Item 601(b)(21)(ii) of Regulation S-K, the names of other subsidiaries of Knight-Swift Transportation Holdings Inc. are omitted because, considered in the aggregate, they would not constitute a significant subsidiary as of the end of the year covered by this report.