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| 1.     | I      have reviewed this quarterly report on Form 10-Q of The Jones Financial      Companies, L.L.L.P.                                                                                                                                                                                                                                                          |
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| 2.     | Based      on my knowledge, this quarterly report does not contain any untrue      statement of a material fact or omit to state a material fact necessary to      make the statements made, in light of the circumstances under which such      statements were made, not misleading with respect to the period covered by      this quarterly report.          |
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| 3.     | Based      on my knowledge, the financial statements, and other financial information      included in this quarterly report, fairly present in all material respects      the financial condition, results of operations and cash flows of the      Partnership as of, and for, the periods presented in this quarterly      report.                            |
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| 4.     | The      Partnership's other certifying officer and I are responsible for      establishing and maintaining disclosure controls and procedures (as      defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal      control over financial reporting (as defined in Exchange Act Rules      13a-15(f) and 15d-15(f)) for the Partnership and  have: |

|   | a) | Designed      such disclosure controls and procedures, or caused such disclosure      controls and procedures to be designed under our supervision, to ensure      that material information relating to the Partnership, including its      consolidated subsidiaries, is made known to us by others within those      entities, particularly during the period in which this quarterly report is      being prepared; |
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|   | b) | Designed      such internal control over financial reporting, or caused such internal      control over financial reporting to be designed under our supervision, to      provide reasonable assurance regarding the reliability of financial      reporting and the preparation of financial statements for external      purposes in accordance with generally accepted accounting principles;                        |
|   | c) | Evaluated      the effectiveness of the Partnership’s disclosure controls and procedures      and quarterly presented in this quarterly report our conclusions about the      effectiveness of the disclosure controls and procedures, as of the end of      the period covered by this report based on such evaluation;      and                                                                                 |
|   | d) | Disclosed      in this report any change in the Partnership's internal control over      financial reporting that occurred during the Partnership's most recent      fiscal quarter that has materially affected, or is reasonably likely to      materially affect, the Partnership's internal control over financial      reporting; and                                                                              |

| 5. | The      Partnership's other certifying officer and I have disclosed, based on our      most recent evaluation of internal control over financial reporting, to      the Partnership's auditors and the Executive  Committee: |
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|   | a) | All      significant deficiencies and material weaknesses in the design or      operation of internal controls over financial reporting which are      reasonably likely to adversely affect the Partnership's ability to record,      process, summarize, and report financial information;  and |
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|   | b) | Any      fraud, whether or not material, that involves management or other      associates who have a significant role in the Partnership's internal      control over financial reporting.                                                                                                       |

|   | /s/ James D.      Weddle                                            |
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|   | Chief      Executive Officer                                                                                                                                                                                                                                                               |
|   | The      Jones Financial Companies, L.L.L.P.                                                                                                                                                                                                                                               |
|   | August      8, 2008                                                                                                                                                                                                                                                                        |