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| 1. | I have      reviewed this report on Form 10-Q of The Jones Financial Companies,      L.L.L.P. (the "Partnership"). |
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| 2. | Based on my      knowledge, this 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      report; |
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| 3. | Based on my      knowledge, the financial statements, and other financial information      included in this 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      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: |
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| 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 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; |
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| c)   | Evaluated the      effectiveness of the Partnership’s disclosure controls and procedures and      presented in this 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 |
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| 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 |
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| 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 Executive  Committee: |
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|   | a) | All      significant deficiencies and material weaknesses in the design or      operation of internal control 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. |
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