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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 H, 1.350% NOTES DUE 2019                                                | $600,000,000 | $60,420 |
| (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. 20                                                                                              |   | Filed Pursuant to Rule 424(b)(3) |
| Dated May 13, 2016 to                                                                                                  |   | Registration No. 333-195039 |
| PROSPECTUS SUPPLEMENT                                                                                                  |   |   |
| Dated April 4, 2014 and                                                                                                |   |   |
| PROSPECTUS                                                                                                             |   |   |
| Dated April 4, 2014                                                                                                    |   |   |
| CATERPILLAR FINANCIAL SERVICES CORPORATION                                                                             |
| MEDIUM-TERM NOTES, SERIES H, 1.350% NOTES DUE 2019                                                                     |
|                                                                                                                   |
| SUBJECT                                                                                                                |   | FINAL PRICING DETAILS |
|                                                                                                                   |   |   |
| Issuer:                                                                                                                |   | Caterpillar Financial Services Corporation |
| Title of Securities:                                                                                                   |   | Medium-Term Notes, Series H, 1.350% Notes Due 2019 |
| Format:                                                                                                                |   | SEC Registered-Registration Statement Number 333-195039 |
| Trade Date/Pricing Effective Time:                                                                                     |   | May 13, 2016 |
| Settlement Date (Original Issue Date):                                                                                 |   | May 18, 2016 |
| Maturity Date:                                                                                                         |   | May 18, 2019 |
| Principal Amount:                                                                                                      |   | $600,000,000 |
| Price to Public (Issue Price):                                                                                         |   | 99.944% |
| Dealers' Commission:                                                                                                   |   | 0.250% (25.0 basis points) |
| All-in-price:                                                                                                          |   | 99.694% |
| Net Proceeds to Issuer:                                                                                                |   | $598,164,000 |
| Coupon:                                                                                                                |   | 1.350% |
| Yield to Maturity:                                                                                                     |   | 1.369% |
| 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 |

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| 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 18th of May and November of each year, commencing November 18, 2016 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:                                                                                            |   | The notes may be redeemed at the option of Caterpillar Financial Services Corporation prior to the stated maturity date.  See “Other Provisions—Optional Redemption” below. |
| 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. (23.34%) |
|                                                                                                   |   | J.P. Morgan Securities LLC (23.33%) |
|                                                                                                   |   | Mitsubishi UFJ Securities (USA), Inc. (23.33%) |
| Co-Managers:                                                                                           |   | BNY Mellon Capital Markets, LLC (3.00%) |
|                                                                                                   |   | Commerz Markets LLC (3.00%) |
|                                                                                                   |   | Deutsche Bank Securities Inc. (3.00%) |
|                                                                                                   |   | HSBC Securities (USA) Inc. (3.00%) |
|                                                                                                   |   | Itau BBA USA Securities, Inc. (3.00%) |
|                                                                                                   |   | KBC Securities USA, Inc. (3.00%) |
|                                                                                                   |   | Loop Capital Markets LLC (3.00%) |
|                                                                                                   |   | Mizuho Securities USA Inc. (3.00%) |
|                                                                                                   |   | Standard Chartered Bank (3.00%) |
|                                                                                                   |   | Wells Fargo Securities, LLC (3.00%) |
|                                                                                                   |   | Standard Chartered Bank will not effect any offers or sales of any notes in the United States unless it is through one or more U.S. registered broker-dealers as permitted by the regulations of FINRA. |
| Billing and Delivery Agent:                                                                            |   | J.P. Morgan Securities LLC |
| CUSIP:                                                                                                 |   | 14912L6R7 |

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| Other Terms: |  Optional RedemptionThe notes may be redeemed in whole at any time or in part from time to time, at our option, at a redemption price equal to the greater of:•    100% of the principal amount of the notes to be redeemed; or •    the sum of the present values of the remaining scheduled payments of principal and interest on the notes to be redeemed, discounted to the date of redemption on a semi-annual basis (assuming a 360-day year consisting of twelve 30-day months) at the applicable Treasury Rate, plus 10.0 basis points,in each case, plus accrued and unpaid interest on the principal amount being redeemed to the redemption date.“Business Day” means any calendar day that is not a Saturday, Sunday or legal holiday in New York, New York and on which commercial banks are open for business in New York, New York.“Comparable Treasury Issue” means the United States Treasury security selected by the Independent Investment Banker as having a maturity comparable to the remaining term (“Remaining Life”) of the notes to be redeemed that would be utilized, at the time of selection and in accordance with customary financial practice, in pricing new issues of corporate debt securities of comparable maturity to the Remaining Life of such notes.“Comparable Treasury Price” means (1) the average of five Reference Treasury Dealer Quotations for such redemption date, after excluding the highest and lowest Reference Treasury Dealer Quotations, or (2) if, after seeking at least five Reference Treasury Dealer Quotations and excluding the highest and lowest Reference Treasury Dealer Quotations, the Independent Investment Banker obtains fewer than five such Reference Dealer Quotations, the average of all such quotations.“Independent Investment Banker” means any of Barclays Capital Inc., J.P. Morgan Securities LLC or a Primary Treasury Dealer appointed by Mitsubishi UFJ Securities (USA), Inc. and any of their respective successors, as appointed by us, or, if any of the foregoing is unwilling or unable to select the Comparable Treasury Issue, a nationally recognized investment banking institution which is a Primary Treasury Dealer appointed by us.“Reference Treasury Dealer” means (1) any of Barclays Capital Inc., J.P. Morgan Securities LLC or a Primary Treasury Dealer appointed by Mitsubishi UFJ Securities (USA), Inc. and any of their respective successors, as appointed by us, provided, however, that if any of the foregoing shall cease to be a primary U.S. government securities dealer (a “Primary Treasury Dealer”), we will substitute for such dealer another Primary Treasury Dealer, and (2) any other nationally recognized Primary Treasury Dealer selected by the Independent Investment Banker and acceptable to us.“Reference Treasury Dealer Quotations” means, with respect to each Reference Treasury Dealer and any redemption date, the average, as determined by the Independent Investment Banker, of the bid and asked prices for the Comparable Treasury Issue (expressed in each case as a percentage of its principal amount) quoted in writing to the Independent Investment Banker at 5:00 p.m., New York, New York time, on the third Business Day preceding such redemption date.“Treasury Rate” means, with respect to any redemption date, (1) the yield, under the heading which represents the average for the immediately preceding week, appearing in the most recently published statistical release designated “H.15(519)” or any successor publication which is published weekly by the Board of Governors of the Federal Reserve System and which establishes yields on actively traded United States Treasury securities adjusted to constant maturity under the caption “Treasury Constant Maturities,” for the maturity corresponding to the Comparable Treasury Issue (or, if no maturity is within three months before or after the Remaining Life, yields for the two published maturities most closely corresponding to the Comparable Treasury Issue will be determined and the Treasury Rate will be interpolated or extrapolated from such yields on a straight line basis, rounding to the nearest month), or (2) if such release (or any successor release) is not published during the week preceding the calculation date or does not contain such yields, the rate per annum equal to the semi-annual equivalent yield-to-maturity of the Comparable Treasury Issue, calculated using a price for the Comparable Treasury Issue (expressed as a percentage of its principal amount) equal to the Comparable Treasury Price of such redemption date. The Treasury Rate will be calculated on the third Business Day preceding the redemption date.Holders of the notes to be redeemed will receive notice thereof by first-class mail at least 30 and not more than 60 days before the date fixed for redemption. If fewer than all of the notes of a series are to be redeemed, the trustee will select the particular notes of such series or portions thereof for redemption from the outstanding notes of such series not previously called, pro rata or by lot, or in such other manner as we shall direct.Supplemental United States Federal Income Tax ConsiderationsPursuant to Treasury regulations and other published guidance, Foreign Account Tax Compliance Act (FATCA) withholding (as described in the prospectus supplement under the caption entitled “Certain United States Federal Income Tax Consequences—Non-United States Holders—Foreign Account Tax Compliance”) currently applies to interest payments made on the notes and is expected to apply to payments of gross proceeds from the sale or other disposition of the notes after December 31, 2018.Notice to Prospective Investors in Canada The notes may be sold only to purchasers in Canada purchasing, or deemed to be purchasing, as principal that are accredited investors, as defined in National Instrument 45-106 Prospectus Exemptions or subsection 73.3(1) of the Securities Act (Ontario), and are permitted clients, as defined in National Instrument 31-103 Registration Requirements, Exemptions and Ongoing Registrant Obligations. Any resale of the notes must be made in accordance with an exemption from, or in a transaction not subject to, the prospectus requirements of applicable securities laws.Securities legislation in certain provinces or territories of Canada may provide a purchaser with remedies for rescission or damages if this pricing supplement, the accompanying prospectus supplement and the accompanying prospectus (including any amendment thereto) contain a misrepresentation, provided that the remedies for rescission or damages are exercised by the purchaser within the time limit prescribed by the securities legislation of the purchaser’s province or territory. The purchaser should refer to any applicable provisions of the securities legislation of the purchaser’s province or territory for particulars of these rights or consult with a legal advisor.Pursuant to section 3A.3 of National Instrument 33-105 Underwriting Conflicts (NI 33-105), the underwriters are not required to comply with the disclosure requirements of NI 33-105 regarding conflicts of interest in connection with this offering. |

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| 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. |