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 44 46,000 PRN   SOLE 0 46,000 0 0
LAYNE CHRISTENSEN 4.25 CONVERT DUE 11/15/2018 Convertible Bonds 521050AB0 10,732 11,043,000 PRN   SOLE 0 11,043,000 0 0
APPLE INC. Common Stocks 037833100 23,751 154,104 SH   SOLE 0 154,104 0 0
ABB LIMITED Common Stocks 000375204 9,869 398,755 SH   SOLE 0 398,755 0 0
ACCENTURE PLC Common Stocks G1151C101 6,637 49,138 SH   SOLE 0 49,138 0 0
AMGEN INC Common Stocks 031162100 280 1,500 SH   SOLE 0 1,500 0 0
BRISTOL-MYERS SQUIBB CO Common Stocks 110122108 8,662 135,899 SH   SOLE 0 135,899 0 0
CELGENE CORPORATION Common Stocks 151020104 9,892 67,840 SH   SOLE 0 67,840 0 0
CHECK POINT SOFTWARE TECH Common Stocks M22465104 12,403 108,777 SH   SOLE 0 108,777 0 0
DISH NETWORK CORP Common Stocks 25470M109 601 11,075 SH   SOLE 0 11,075 0 0
DORCHESTER MINERALS LP Common Stocks 25820R105 920 61,130 SH   SOLE 0 61,130 0 0
DELL TECHNOLOGIES CLASS V Common Stocks 24703L103 15,292 198,061 SH   SOLE 0 198,061 0 0
ENTERPRISE PRODUCTS PRTNS Common Stocks 293792107 27,548 1,056,712 SH   SOLE 0 1,056,712 0 0
TWENTY-FIRST CENTURY FOX, INC Common Stocks 90130A101 8,319 315,359 SH   SOLE 0 315,359 0 0
GILEAD SCIENCES, INC Common Stocks 375558103 13,851 170,954 SH   SOLE 0 170,954 0 0
ALPHABET INC CL C (GOOGLE C) Common Stocks 02079K107 27,663 28,842 SH   SOLE 0 28,842 0 0
ALPHABET INC CL A (GOOGLE A) Common Stocks 02079K305 17,141 17,604 SH   SOLE 0 17,604 0 0
HONEYWELL INTL INC Common Stocks 438516106 2,030 14,321 SH   SOLE 0 14,321 0 0
INOVALON HOLDINGS INC. (Class A) Common Stocks 45781D101 13,741 805,912 SH   SOLE 0 805,912 0 0
KINDER MORGAN, INC. Common Stocks 49456B101 18,927 986,795 SH   SOLE 0 986,795 0 0
LAS VEGAS SANDS Common Stocks 517834107 11,420 178,000 SH   SOLE 0 178,000 0 0
MONSANTO COMPANY Common Stocks 61166W101 21,592 180,204 SH   SOLE 0 180,204 0 0
THE MOSAIC COMPANY Common Stocks 61945C103 4,304 199,374 SH   SOLE 0 199,374 0 0
MATADOR RESOURCES CO. Common Stocks 576485205 1,222 45,000 SH   SOLE 0 45,000 0 0
NOBLE ENERGY INC Common Stocks 655044105 8,698 306,717 SH   SOLE 0 306,717 0 0
QUALCOMM INC Common Stocks 747525103 24,746 477,358 SH   SOLE 0 477,358 0 0
SCHLUMBERGER LTD Common Stocks 806857108 11,975 171,666 SH   SOLE 0 171,666 0 0
EXXON MOBIL CORP Common Stocks 30231G102 340 4,151 SH   SOLE 0 4,151 0 0
XYLEM INC. Common Stocks 98419M100 10,426 166,476 SH   SOLE 0 166,476 0 0