The Securities and Exchange Commission has not necessarily reviewed the information in this filing and has not determined if it is accurate and complete.
The reader should not assume that the information is accurate and complete.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 13F

FORM 13F INFORMATION TABLE
OMB APPROVAL
OMB Number: 3235-0006
Estimated average burden
hours per response: 23.8
COLUMN 1 COLUMN 2 COLUMN 3 COLUMN 4 COLUMN 5 COLUMN 6 COLUMN 7 COLUMN 8
VALUE SHRS OR SH/ PUT/ INVESTMENT OTHER VOTING AUTHORITY
NAME OF ISSUER TITLE OF CLASS CUSIP (x$1000) PRN AMT PRN CALL DISCRETION MANAGER SOLE SHARED NONE
BARCLAYS BK PLC CONV ZERO CPN Convertible Bonds 06741JV89 49 46,000 PRN   SOLE 0 46,000 0 0
GOLDMAN SACHS 0.0 CONV FOR AAPL Convertible Bonds 38141GMG6 47 31,000 PRN   SOLE 0 31,000 0 0
GOLDMAN SACHS GROUP INC 0.0 CONV FOR GOOG Convertible Bonds 38147QLX2 42 37,000 PRN   SOLE 0 37,000 0 0
GOLDMAN SACHS GROUP INC 0.0 CONV TO KSU Convertible Bonds 38147QMF0 25 27,000 PRN   SOLE 0 27,000 0 0
LAYNE CHRISTENSEN 4.25 CONVERT DUE 11/15/2018 Convertible Bonds 521050AB0 11,233 12,747,000 PRN   SOLE 0 12,747,000 0 0
SOCIETE GENERALE S.A. MTN CONV B/E Convertible Bonds 83368WXV8 29 29,000 PRN   SOLE 0 29,000 0 0
WELLS FARGO & CO. 0.0 CONV FOR INTC Convertible Bonds 94986RQF1 38 30,000 PRN   SOLE 0 30,000 0 0
WELLS FARGO & CO 0.0 CONV FOR IP Convertible Bonds 94986RQH7 29 30,000 PRN   SOLE 0 30,000 0 0
APPLE INC. Common Stocks 037833100 29,439 204,918 SH   SOLE 0 204,918 0 0
ABB LIMITED Common Stocks 000375204 10,094 431,375 SH   SOLE 0 431,375 0 0
ACCENTURE PLC Common Stocks G1151C101 6,366 53,103 SH   SOLE 0 53,103 0 0
AMGEN INC Common Stocks 031162100 246 1,500 SH   SOLE 0 1,500 0 0
AMAZON COM INC Common Stocks 023135106 275 310 SH   SOLE 0 310 0 0
APACHE CORP Common Stocks 037411105 975 18,968 SH   SOLE 0 18,968 0 0
BRISTOL-MYERS SQUIBB CO Common Stocks 110122108 7,589 139,558 SH   SOLE 0 139,558 0 0
CELGENE CORPORATION Common Stocks 151020104 8,675 69,716 SH   SOLE 0 69,716 0 0
CHECK POINT SOFTWARE TECH Common Stocks M22465104 12,140 118,250 SH   SOLE 0 118,250 0 0
DISH NETWORK CORP Common Stocks 25470M109 757 11,925 SH   SOLE 0 11,925 0 0
DORCHESTER MINERALS LP Common Stocks 25820R105 1,356 78,830 SH   SOLE 0 78,830 0 0
DELL TECHNOLOGIES CLASS V Common Stocks 24703L103 13,286 207,339 SH   SOLE 0 207,339 0 0
ENTERPRISE PRODUCTS PRTNS Common Stocks 293792107 30,695 1,111,741 SH   SOLE 0 1,111,741 0 0
TWENTY-FIRST CENTURY FOX, INC Common Stocks 90130A101 10,724 331,103 SH   SOLE 0 331,103 0 0
GILEAD SCIENCES, INC Common Stocks 375558103 13,300 195,819 SH   SOLE 0 195,819 0 0
ALPHABET INC CL C (GOOGLE C) Common Stocks 02079K107 24,961 30,089 SH   SOLE 0 30,089 0 0
ALPHABET INC CL A (GOOGLE A) Common Stocks 02079K305 15,839 18,683 SH   SOLE 0 18,683 0 0
HONEYWELL INTL INC Common Stocks 438516106 1,688 13,521 SH   SOLE 0 13,521 0 0
INOVALON HOLDINGS INC. (Class A) Common Stocks 45781D101 10,867 862,462 SH   SOLE 0 862,462 0 0
KINDER MORGAN, INC. Common Stocks 49456B101 22,137 1,018,250 SH   SOLE 0 1,018,250 0 0
LAS VEGAS SANDS Common Stocks 517834107 10,830 189,761 SH   SOLE 0 189,761 0 0
MATTEL, INC. Common Stocks 577081102 11,461 447,521 SH   SOLE 0 447,521 0 0
MONSANTO COMPANY Common Stocks 61166W101 16,866 148,991 SH   SOLE 0 148,991 0 0
THE MOSAIC COMPANY Common Stocks 61945C103 5,873 201,284 SH   SOLE 0 201,284 0 0
MATADOR RESOURCES CO. Common Stocks 576485205 1,071 45,000 SH   SOLE 0 45,000 0 0
NOBLE ENERGY INC Common Stocks 655044105 10,812 314,846 SH   SOLE 0 314,846 0 0
QUALCOMM INC Common Stocks 747525103 28,949 504,857 SH   SOLE 0 504,857 0 0
SCHLUMBERGER LTD Common Stocks 806857108 13,850 177,331 SH   SOLE 0 177,331 0 0
SYNGENTA AG ADR Common Stocks 87160A100 1,328 15,000 SH   SOLE 0 15,000 0 0
EXXON MOBIL CORP Common Stocks 30231G102 344 4,196 SH   SOLE 0 4,196 0 0
XYLEM INC. Common Stocks 98419M100 8,818 175,583 SH   SOLE 0 175,583 0 0
SINTANA ENERGY INC. NEW Common Stocks 82938H107 2 52,895 SH   SOLE 0 52,895 0 0