Exhibit 4.2



ZQ|CERT#|COY|CLS|RGSTRY|ACCT#|TRANSTYPE|RUN#|TRANS#   . COMMON STOCK PAR VALUE $0.01 COMMON STOCK THIS CERTIFICATE IS TRANSFERABLE   IN CANTON, MA, JERSEY CITY, NJ AND COLLEGE STATION, TX Certificate Number   ZQ00000000 Shares * * 000000 * * * * * * * * * * * * * * * * * * * * * 000000   * * * * * * * * * * * * * * * * * * * * * 000000 * * * * * * * * * * * * * *   * * * * * * * 000000 * * * * * * * * * * * * * * * * * * * * * 000000 * * * *   * * * * * * * * * * CF INDUSTRIES HOLDINGS, INC. INCORPORATED UNDER THE LAWS   OF THE STATE OF DELAWARE ** Mr. Alexander David Sample **** Mr. Alexander   David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample   **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr.   Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander   David Sample **** Mr. Alexander David THIS CERTIFIES THAT Sample **** Mr.   Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander   David Sample **** Mr. Alexander David Sample **** Mr. Alexander Alexander   David SamMple ***R* Mr. A.lexaSnderADavidMSampPle ***L* MrE. Alexan&der   DavMid SamRple **S** Mr.. AleSxandeAr DaMvid SamPple *L*** MEr.   Alex&ander David Sample **** David Sample **** Mr. Alexander David Sample   **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr.   Alexander David Sample **** Mr. Mr. Alexander David Sample **** Mr. Alexander   David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample   **** Mr. Alexander David Sample Sample **** Mr. AlexandeMr DaviRd Sam.ple   S**** MAr. AleMxandePr DavLid SEample *&*** Mr. AMlexanRder DaSvid   S.ampSle ***A* Mr.MAlexanPder DLavidESample **** Mr. Alexander **** Mr.   Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander   David Sample **** Mr. Alexander David Sample **** Mr. Alexander David SEE   REVERSE FOR CERTAIN DEFINITIONS David Sample **** Mr. Alexander David Sample   **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr.   Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander   David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample   **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr.   Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander   David Sample **** Mr. Sample **** Mr. Sample is the owner of   **000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares***   *000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****   000000**Shar*es****0*000Z00**SEhareRs****00O0000** ShHares**U**0000N00**SDhares*R***000E000**DShares**T**000H000**SOhares*U***000S000**AShareNs****00D0000**Shares****0   00000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****00   0000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000   000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****0000   00**Shares****0Z0000E0**ShRares***O*000000*H*ShareUs****0N00000D**SharRes****0E0000D0**ShareAs****0N00000D**SharesZ****00E0000R**SharOes****0*000*00**Shares****00000   0**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000   **Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000*   *Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**   Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**S   FULLY-PAID AND NON-ASSESSABLE SHARES OF COMMON STOCK, $0.01 PAR VALUE, OF CF   INDUSTRIES HOLDINGS, INC. transferable on the books of the Corporation by the   said holder, in person or by Attorney, upon surrender of this Certificate   properly endorsed. This Certificate is not valid unless countersigned by the   Transfer Agent and registered by the Registrar. Witness the facsimile seal of   the Corporation and the facsimile signatures of its duly authorized officers.   DATED DD-MMM-YYYY COUNTERSIGNED AND REGISTERED: COMPUTERSHARE TRUST COMPANY,   N.A. TRANSFER AGENT AND REGISTRAR, President and Chief Executive Officer 2005   DELAWARE Senior Vice President, General Counsel, and Secretary By AUTHORIZED SIGNATURE   CUSIP Holder ID Insurance Value Number of Shares DTC Certificate Numbers   1234567890/1234567890 1234567890/1234567890 1234567890/1234567890   1234567890/1234567890 1234567890/1234567890 1234567890/1234567890 Total   Transaction XXXXXX XX X XXXXXXXXXX 1,000,000.00 123456 12345678   123456789012345 PO BOX 43004, Providence, RI 02940-3004 Num/No. Denom. Total   1 2 3 4 5 6 7 1 2 3 4 5 6 1 2 3 4 5 6 MR A SAMPLE DESIGNATION (IF ANY) ADD 1   ADD 2 ADD 3 ADD 4 F CUSIP 125269 10 0 


    




 









 



. CF Industries   Holdings, Inc. (the “Corporation”) will furnish without charge to each   stockholder who so requests, a copy of the powers, designations, preferences   and relative, participating, optional, or other special rights of each class   of stock or series thereof and the qualifications, limitations or   restrictions of such preferences and/or rights. This certificate also   evidences and entitles the holder hereof to certain Rights as set forth in   the Tax Benefits Preservation Plan between the Corporation and the Rights   Agent (including any successor Rights Agent) thereunder, as originally   executed and as it may be amended or restated from time to time, the “Tax   Benefits Preservation Plan”), the terms of which are hereby incorporated   herein by reference and a copy of which is on file at the principal offices   of the Corporation. Under certain circumstances, as set forth in the Tax   Benefits Preservation Plan, Rights will be evidenced by separate certificates   and will no longer be evidenced by this certificate. The Corporation will   mail to the holder of this certificate a copy of the Tax Benefits   Preservation Plan, as in effect on the date of mailing, without charge,   promptly after receipt of a written request therefor. Under certain   circumstances set forth in the Tax Benefits Preservation Plan, Rights issued   to, or held by, any Person that is, was or becomes an Acquiring Person or any   Affiliate or Associate thereof (as such terms are defined in the Tax Benefits   Preservation Plan), whether currently held by or on behalf of such Person or   by any subsequent holder, may become null and void. (Cust) (Minor) (State)   (Cust) and not as tenants in common (Minor) (State) PLEASE INSERT SOCIAL   SECURITY OR OTHER IDENTIFYING NUMBER OF ASSIGNEE For value received, hereby   sell, assign and transfer unto (PLEASE PRINT OR TYPEWRITE NAME AND ADDRESS,   INCLUDING POSTAL ZIP CODE, OF ASSIGNEE) Shares of the common stock   represented by the within Certificate, and do hereby irrevocably constitute   and appoint Attorney to transfer the said stock on the books of the within   named Corporation with full power of substitution in the premises. Dated: 20   Signature: Signature: Notice: The signature to this assignment must   correspond with the name as written upon the face of the certificate, in   every particular, without alteration or enlargement, or any change whatever.   KEEP THIS STOCK CERTIFICATE IN A SAFE PLACE. IF IT IS LOST, STOLEN, OR   DESTROYED, THE CORPORATION WILL REQUIRE A BOND OF INDEMNITY AS A CONDITION TO   THE ISSUANCE OF A REPLACEMENT CERTIFICATE. The IRS requires that we report   the cost basis of certain shares acquired after January 1, 2011. If your   shares were covered by the legislation and you have sold or transferred the   shares and requested a specific cost basis calculation method, we have   processed as requested. If you did not specify a cost basis calculation   method, we have defaulted to the first in, first out (FIFO) method. Please   visit our website or consult your tax advisor if you need additional   information about cost basis. If you do not keep in contact with us or do not   have any activity in your account for the time periods specified by state   law, your property could become subject to state unclaimed property laws and   transferred to the appropriate state. Signature(s) Guaranteed: Medallion   Guarantee Stamp THE SIGNATURE(S) SHOULD BE GUARANTEED BY AN ELIGIBLE   GUARANTOR INSTITUTION (Banks, Stockbrokers, Savings and Loan Associations and   Credit Unions) WITH MEMBERSHIP IN AN APPROVED SIGNATURE GUARANTEE MEDALLION   PROGRAM, PURSUANT TO S.E.C. RULE 17Ad-15. The following abbreviations, when   used in the inscription on the face of this certificate, shall be construed   as though they were written out in full according to applicable laws or   regulations: TEN COM - as tenants in common UNIF GIFT MIN ACT -   ............................................Custodian   ................................................ TEN ENT - as tenants by the   entireties under Uniform Gifts to Minors   Act......................................................... JT TEN - as joint   tenants with right of survivorship UNIF TRF MIN ACT -   ............................................Custodian (until age   ................................) .............................under Uniform   Transfers to Minors Act ................... Additional abbreviations may also   be used though not in the above list.