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| CALCULATION OF REGISTRATION FEE                                                                   |
| Title of Each Class of Securities Offered                                                         | Maximum Aggregate Offering Price (1) | Amount of Registration Fee(2) |
| MEDIUM-TERM NOTES, SERIES G, 3.75% NOTES DUE 2023                                                 | $250,000,000 | $32,200 |
| (1) Excludes accrued interest, if any.                                                            |   |   |
| (2) The filing fee is calculated in accordance with Rule 457(r) under the Securities Act of 1933. |

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| PRICING SUPPLEMENT NO. 40                                     |   | Filed Pursuant to Rule 424(b)(3) |
| Dated February 26, 2014 to                                    |   | Registration No. 333-173364 |
| PROSPECTUS SUPPLEMENT                                         |   |   |
| Dated April 7, 2011 and                                       |   |   |
| PROSPECTUS                                                    |   |   |
| Dated April 7, 2011                                           |   |   |
| CATERPILLAR FINANCIAL SERVICES CORPORATION                    |
| MEDIUM-TERM NOTES, SERIES G, 3.75% NOTES DUE 2023 (REOPENING) |

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|----------------------------------------|
|                                        |  |  |
| SUBJECT                                |   | FINAL PRICING DETAILS |
|                                   |   |   |
| Issuer:                                |   | Caterpillar Financial Services Corporation |
| Title of Securities:                   |   | Medium-Term Notes, Series G, 3.75% Notes Due 2023 |
| Format:                                |   | SEC Registered-Registration Statement Number 333-173364 |
| Trade Date/Pricing Effective Time:     |   | February 26, 2014 |
| Settlement Date (Original Issue Date): |   | March 3, 2014 |
| Maturity Date:                         |   | November 24, 2023 |
| Principal Amount:                      |   | $250,000,000.  The notes offered hereby constitute a further issuance of, and will be consolidated with, the $250,000,000 aggregate principal amount of Medium-Term Notes, Series G, 3.75% Notes Due 2023 issued by us on November 26, 2013. The notes offered hereby will have the same CUSIP number as the previously issued Medium-Term Notes, Series G, 3.75% Notes Due 2023 and will trade interchangeably with the previously issued Medium-Term Notes, Series G, 3.75% Notes Due 2023 immediately upon settlement. Upon completion of this offering, the aggregate principal amount outstanding of Medium-Term Notes, Series G, 3.75% Notes Due 2023 will be $500,000,000. |
| Price to Public (Issue Price):         |   | 101.653%, plus accrued interest |
| Dealers' Commission:                   |   | 0.45% (45 basis points) of the principal amount |
| Accrued Interest:                      |   | $2,526,041.67 |
| All-in-price:                          |   | 101.203%, plus accrued interest |
| Net Proceeds to Issuer:                |   | $253,007,500, plus accrued interest |

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|                                                                                                                        |  |  |
| Coupon                                                                                                                 |   | 3.75% |
| Yield to Maturity:                                                                                                     |   | 3.547% |
| Spread Multiplier:                                                                                                     |   | N/A |
| Spread/Spread Multiplier Reset Option:                                                                                 |   | N/A |
| Optional Reset Dates (only applicable if option to reset spread or spread multiplier):                                 | N/A |
| Basis for Interest Rate Reset (only applicable if option to reset spread or spread multiplier):                        | N/A |
| Specified Currency:                                                                                                    |   | U.S. Dollars |
| Option to Elect Payment in U.S. Dollars  (only applicable if Specified Currency is other than U.S. Dollars): | N/A |
| Authorized Denominations (only applicable if Specified Currency is other than U.S. Dollars):                           | N/A |
| Historical Exchange Rate (only applicable if Specified Currency is other than U.S. Dollars):                           | N/A |
| Maximum Interest Rate:                                                                                                 |   | N/A |
| Minimum Interest Rate:                                                                                                 |   | N/A |
| Interest Payment Dates:                                                                                                |   | Interest will be paid semi-annually on the 24th of May and November of each year, commencing May 24, 2014 and ending on the Maturity Date |
| Stated Maturity Extension Option:                                                                                      |   | N/A |
| Extension Period(s) and Final Maturity Date (only applicable if option to extend stated maturity):                     | N/A |
| Basis for Interest Rate During Extension Period (only applicable if option to extend stated maturity):                 | N/A |
| Original Issue Discount Note:                                                                                          |   | N/A |
| Total Amount of OID:                                                                                                   |   | N/A |
| Terms of Amortizing Notes:                                                                                             |   | N/A |
| Redemption Date(s):                                                                                                    |   | N/A |
| Redemption Price:                                                                                                      |   | N/A |
| Repayment Date(s):                                                                                                     |   | N/A |
| Repayment Price(s):                                                                                                    |   | N/A |
| Day Count Convention:                                                                                                  |   | 30/360 |
| Denominations:                                                                                                         |   | Minimum denominations of $1,000 with increments of $1,000 thereafter |
| Joint Lead Managers & Bookrunners:                                                                                 |   | Barclays Capital Inc. (22.34%) |
|                                                                                                                   |   | Citigroup Global Markets Inc.  (22.33%) |
|                                                                                                                   |   | J.P. Morgan Securities LLC (22.33%) |
| Co-Managers:                                                                                                           |   | BBVA Securities Inc. (3.00%) |
|                                                                                                                   |   | BNP Paribas Securities Corp. (3.00%) |
|                                                                                                                   |   | BNY Mellon Capital Markets, LLC (3.00%) |
|                                                                                                                   |   | Commerz Markets LLC (3.00%) |
|                                                                                                                   |   | Deutsche Bank Securities Inc. (3.00%) |
|                                                                                                                   |   | HSBC Securities (USA) Inc. (3.00%) |
|                                                                                                                   |   | ING Financial Markets LLC (3.00%) |
|                                                                                                                   |   | Lloyds Securities Inc. (3.00%) |
|                                                                                                                   |   | Mitsubishi UFJ Securities (USA), Inc. (3.00%) |
|                                                                                                                   |   | The Williams Capital Group, L.P. (3.00%) |

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|                                                                                                                                                                                                                                                                                                                                                                                           |  |  |
|                                                                                                                                                                                                                                                                                                                                                                                      |   | U.S. Bancorp Investments, Inc. (3.00%) |
| Billing and Delivery Agent:                                                                                                                                                                                                                                                                                                                                                               |   | Barclays Capital Inc. |
| Exchange Rate Agent:                                                                                                                                                                                                                                                                                                                                                                      |   | U.S. Bank Trust National Association |
| Calculation Agent:                                                                                                                                                                                                                                                                                                                                                                        |   | U.S. Bank Trust National Association |
| CUSIP:                                                                                                                                                                                                                                                                                                                                                                                    |   | 14912L5X5 |
| Other Terms:                                                                                                                                                                                                                                                                                                                                                                              |   | N/A |
| Supplemental United States Federal Income Tax Considerations                                                                                                                                                                                                                                                                                                                              |   | Pursuant to final Treasury regulations and an Internal Revenue Service notice, Foreign Account Tax Compliance Act (FATCA) withholding (as described in “Certain United States Federal Income Tax Consequences—Non-United States Holders—Foreign Account Tax Compliance” in the prospectus supplement) will generally not apply to debt obligations that are issued prior to July 1, 2014; therefore, the Notes will not be subject to FATCA withholding. |
| CAPITALIZED TERMS USED HEREIN WHICH ARE DEFINED IN THE PROSPECTUS SUPPLEMENT SHALL HAVE THE MEANINGS ASCRIBED THERETO IN THE PROSPECTUS SUPPLEMENT. THE INTEREST RATES ON THE NOTES MAY BE CHANGED BY CATERPILLAR FINANCIAL SERVICES CORPORATION FROM TIME TO TIME, BUT ANY SUCH CHANGE WILL NOT AFFECT THE INTEREST RATE ON ANY NOTES OFFERED PRIOR TO THE EFFECTIVE DATE OF THE CHANGE. |