All Pioneer Companies

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Horace M. Alexander Company (1847)

1847 July 24 – October 16 | Participants: 6

Levi Allred Company (1851)

1851 January 1 – December 31 | Participants: 9

Isaac Allred Company (1855)

1855 July 28 – November 2 | Participants: 63

Fred C. Anderson Company (1868)

1868 October 1 – 24 | Participants: 65

Milo Andrus Company (1850)

1850 June 3 – August 30 | Participants: 161

Milo Andrus Company (1855)

1855 August 4 – October 24 | Participants: 454

Milo Andrus Company (1861)

1861 July 7 – September 12 | Participants: 136

Elias Asper Freight Train (1861)

1861 June 19 – September 12 | Participants: 24

Atchison/Pilling Company (1853)

1853 July 1 – September 13 | Participants: 13

William Atkinson Company (1853)

1853 May 18 – September 10 | Participants: 84

Miner G. Atwood Company (1865)

1865 July 31 – November 8 | Participants: 267

Almon W. Babbitt Company (1849)

1849 May 24 – December 31 | Participants: 1

Almon W. Babbitt Company (1851)

1851 May 15 – July 17 | Participants: 21

Richard Ballantyne Company (1855)

1855 July 1 – September 25 | Participants: 427

John Banks Company (1856)

1856 July 9 – September 22 | Participants: 239

Augustus S. Beckwith Company (1859)

1859 May 1 – August 1 | Participants: 22

Ezra T. Benson Company (1849)

1849 July 15 – October 29 | Participants: 205

John W. Berry Company (1858)

1858 May 10 – June 21 | Participants: 111

Betz Company (1852)

1852 January 1 – December 31 | Participants: 18

William Morley Black Company (1852)

1852 April 1 – October 2 | Participants: 5

Seth M. Blair/Edward Stevenson Company (1855)

1855 June 14 – September 10 | Participants: 133

Henry G. Boyle Company (1848)

1848 March 21 – June 5 | Participants: 7

James Brown Company (1847)

1847 September 1 – November 16 | Participants: 6

Ebenezer Brown Company (1848)

1848 August 12 – October 10 | Participants: 61

John Brown Company (1851)

1851 July 7 – September 29 | Participants: 232