The Securities and Exchange Commission has not necessarily reviewed the information in this filing and has not determined if it is accurate and complete. | |||||||||||||||||
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UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 13F FORM 13F INFORMATION TABLE |
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| 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 |
| 3M Company | COM | 88579y101 | 19,349 | 110,696 | SH | SOLE | 0 | 0 | 110,696 | ||
| Abbott Labs | COM | 002824100 | 1,606 | 14,668 | SH | SOLE | 0 | 0 | 14,668 | ||
| Abbvie Inc. Com | COM | 00287y109 | 1,612 | 15,045 | SH | SOLE | 0 | 0 | 15,045 | ||
| Adobe Sys Inc | COM | 00724F101 | 388 | 776 | SH | SOLE | 0 | 0 | 776 | ||
| Advanced Micro Devices | COM | 007903107 | 952 | 10,377 | SH | SOLE | 0 | 0 | 10,377 | ||
| Air Prods & Chems | COM | 009158106 | 10,556 | 38,634 | SH | SOLE | 0 | 0 | 38,634 | ||
| Alcon | COM | H01301128 | 13,510 | 204,756 | SH | SOLE | 0 | 0 | 204,756 | ||
| Alphabet Inc Cap Sk Cl A | COM | 02079k305 | 1,171 | 668 | SH | SOLE | 0 | 0 | 668 | ||
| Alphabet Inc Cap Sk Cl C | COM | 02079k107 | 208 | 119 | SH | SOLE | 0 | 0 | 119 | ||
| Amazon.Com | COM | 023135106 | 14,995 | 4,604 | SH | SOLE | 0 | 0 | 4,604 | ||
| Apple | COM | 037833100 | 46,644 | 351,526 | SH | SOLE | 0 | 0 | 351,526 | ||
| Auto Data Processing | COM | 053015103 | 32,750 | 185,871 | SH | SOLE | 0 | 0 | 185,871 | ||
| Becton Dickinson | COM | 075887109 | 18,423 | 73,628 | SH | SOLE | 0 | 0 | 73,628 | ||
| Berkshire Hathaway Cl B | COM | 084670702 | 464 | 2,002 | SH | SOLE | 0 | 0 | 2,002 | ||
| Black Stone Minerals L Com Uni | COM | 09225m101 | 1,004 | 150,357 | SH | SOLE | 0 | 0 | 150,357 | ||
| Blackrock Inc | COM | 09247x101 | 426 | 590 | SH | SOLE | 0 | 0 | 590 | ||
| Blackstone Group Inc. | COM | 09253u108 | 297 | 4,575 | SH | SOLE | 0 | 0 | 4,575 | ||
| CVS Health | COM | 126650100 | 243 | 3,562 | SH | SOLE | 0 | 0 | 3,562 | ||
| Centene Corp Del | COM | 15135B101 | 234 | 3,895 | SH | SOLE | 0 | 0 | 3,895 | ||
| Chevron Corp | COM | 166764100 | 783 | 9,273 | SH | SOLE | 0 | 0 | 9,273 | ||
| Chipotle Mexican Grill Com | COM | 169656105 | 277 | 200 | SH | SOLE | 0 | 0 | 200 | ||
| Cintas Corp Com | COM | 172908105 | 13,608 | 38,500 | SH | SOLE | 0 | 0 | 38,500 | ||
| Coca-Cola | COM | 191216100 | 21,442 | 390,983 | SH | SOLE | 0 | 0 | 390,983 | ||
| ConocoPhillips | COM | 20825C104 | 290 | 7,256 | SH | SOLE | 0 | 0 | 7,256 | ||
| Donaldson | COM | 257651109 | 27,362 | 489,649 | SH | SOLE | 0 | 0 | 489,649 | ||
| Dorchester Minerals LP | COM | 25820R105 | 572 | 52,423 | SH | SOLE | 0 | 0 | 52,423 | ||
| Dover | COM | 260003108 | 26,020 | 206,099 | SH | SOLE | 0 | 0 | 206,099 | ||
| Ecolab | COM | 278865100 | 33,592 | 155,258 | SH | SOLE | 0 | 0 | 155,258 | ||
| Emerson Electric | COM | 291011104 | 20,843 | 259,335 | SH | SOLE | 0 | 0 | 259,335 | ||
| Exxon Mobil Corp | COM | 30231g102 | 1,926 | 46,731 | SH | SOLE | 0 | 0 | 46,731 | ||
| Facebook Inc Cl A | COM | 30303m102 | 604 | 2,210 | SH | SOLE | 0 | 0 | 2,210 | ||
| FedEx | COM | 31428x106 | 29,151 | 112,285 | SH | SOLE | 0 | 0 | 112,285 | ||
| First Financial Bankshares | COM | 32020R109 | 265 | 7,336 | SH | SOLE | 0 | 0 | 7,336 | ||
| Home Depot Inc | COM | 437076102 | 596 | 2,243 | SH | SOLE | 0 | 0 | 2,243 | ||
| Honeywell International | COM | 438516106 | 25,491 | 119,843 | SH | SOLE | 0 | 0 | 119,843 | ||
| IShares Tr Trans Avg ETF | COM | 464287192 | 251 | 1,140 | SH | SOLE | 0 | 0 | 1,140 | ||
| Illinois Tool Works | COM | 452308109 | 35,066 | 171,995 | SH | SOLE | 0 | 0 | 171,995 | ||
| Intel | COM | 458140100 | 24,337 | 488,502 | SH | SOLE | 0 | 0 | 488,502 | ||
| International Business Machine | COM | 459200101 | 398 | 3,165 | SH | SOLE | 0 | 0 | 3,165 | ||
| Intuit | COM | 461202103 | 12,116 | 31,898 | SH | SOLE | 0 | 0 | 31,898 | ||
| Intuitive Surgical | COM | 46120E602 | 14,334 | 17,521 | SH | SOLE | 0 | 0 | 17,521 | ||
| Ishares Tr S&P Midcap 400 | COM | 464287507 | 305 | 1,326 | SH | SOLE | 0 | 0 | 1,326 | ||
| J.P. Morgan Chase & Co. | COM | 46625H100 | 612 | 4,820 | SH | SOLE | 0 | 0 | 4,820 | ||
| Johnson & Johnson | COM | 478160104 | 27,013 | 171,643 | SH | SOLE | 0 | 0 | 171,643 | ||
| Lam Research Corp. | COM | 512807108 | 963 | 2,039 | SH | SOLE | 0 | 0 | 2,039 | ||
| Lockheed Martin Corp | COM | 539830109 | 263 | 742 | SH | SOLE | 0 | 0 | 742 | ||
| Lowes Cos Inc | COM | 548661107 | 647 | 4,031 | SH | SOLE | 0 | 0 | 4,031 | ||
| Luminex Corp | COM | 55027E102 | 746 | 32,274 | SH | SOLE | 0 | 0 | 32,274 | ||
| Mastercard Inc Cl A | COM | 57636q104 | 1,500 | 4,201 | SH | SOLE | 0 | 0 | 4,201 | ||
| McCormick | COM | 579780206 | 19,484 | 203,808 | SH | SOLE | 0 | 0 | 203,808 | ||
| McDonald's Corp. | COM | 580135101 | 245 | 1,142 | SH | SOLE | 0 | 0 | 1,142 | ||
| Medtronic PLC | COM | g5960l103 | 917 | 7,830 | SH | SOLE | 0 | 0 | 7,830 | ||
| Merck & Co Inc New | COM | 58933Y105 | 385 | 4,710 | SH | SOLE | 0 | 0 | 4,710 | ||
| Microsoft | COM | 594918104 | 68,668 | 308,730 | SH | SOLE | 0 | 0 | 308,730 | ||
| Mondelez Intl Inc Cl A | COM | 609207105 | 386 | 6,610 | SH | SOLE | 0 | 0 | 6,610 | ||
| National Instr | COM | 636518102 | 19,481 | 443,347 | SH | SOLE | 0 | 0 | 443,347 | ||
| Netflix Inc | COM | 64110L106 | 910 | 1,682 | SH | SOLE | 0 | 0 | 1,682 | ||
| Nike Inc CL B | COM | 654106103 | 458 | 3,236 | SH | SOLE | 0 | 0 | 3,236 | ||
| Nokia | COM | 654902204 | 60 | 15,250 | SH | SOLE | 0 | 0 | 15,250 | ||
| Nordson | COM | 655663102 | 43,303 | 215,491 | SH | SOLE | 0 | 0 | 215,491 | ||
| Novartis AG | COM | 66987V109 | 18,987 | 201,069 | SH | SOLE | 0 | 0 | 201,069 | ||
| Nvidia | COM | 67066g104 | 251 | 480 | SH | SOLE | 0 | 0 | 480 | ||
| Paccar | COM | 693718108 | 20,576 | 238,478 | SH | SOLE | 0 | 0 | 238,478 | ||
| Paypal Hldgs Inc | COM | 70450Y103 | 874 | 3,730 | SH | SOLE | 0 | 0 | 3,730 | ||
| PepsiCo | COM | 713448108 | 24,074 | 162,330 | SH | SOLE | 0 | 0 | 162,330 | ||
| Phillips 66 COM | COM | 718546104 | 258 | 3,688 | SH | SOLE | 0 | 0 | 3,688 | ||
| Procter & Gamble | COM | 742718109 | 27,565 | 198,111 | SH | SOLE | 0 | 0 | 198,111 | ||
| Sabine Royalty Trust UBI | COM | 785688102 | 395 | 14,000 | SH | SOLE | 0 | 0 | 14,000 | ||
| Salesforce Com Inc | COM | 79466L302 | 282 | 1,265 | SH | SOLE | 0 | 0 | 1,265 | ||
| San Juan Basin Royalty Trust | COM | 798241105 | 1,509 | 565,191 | SH | SOLE | 0 | 0 | 565,191 | ||
| ServiceNow Inc Com | COM | 81762P102 | 315 | 572 | SH | SOLE | 0 | 0 | 572 | ||
| Shopify Inc Cl A | COM | 82509l107 | 249 | 220 | SH | SOLE | 0 | 0 | 220 | ||
| Stryker | COM | 863667101 | 11,985 | 48,911 | SH | SOLE | 0 | 0 | 48,911 | ||
| Sysco Corp | COM | 871829107 | 376 | 5,067 | SH | SOLE | 0 | 0 | 5,067 | ||
| Taiwan Semiconductor | COM | 874039100 | 31,287 | 286,929 | SH | SOLE | 0 | 0 | 286,929 | ||
| Telefonica de Espana | COM | 879382208 | 50 | 12,366 | SH | SOLE | 0 | 0 | 12,366 | ||
| United Parcel Svc Cl B | COM | 911312106 | 5,305 | 31,504 | SH | SOLE | 0 | 0 | 31,504 | ||
| UnitedHealth Group Inc | COM | 91324P102 | 713 | 2,034 | SH | SOLE | 0 | 0 | 2,034 | ||
| Vanguard FTSE Developed Market | COM | 921943858 | 280 | 5,941 | SH | SOLE | 0 | 0 | 5,941 | ||
| Vanguard Intl Eqty Idx Emr Mkt | COM | 922042858 | 221 | 4,409 | SH | SOLE | 0 | 0 | 4,409 | ||
| Vanguard World Fds Inf Tech ET | COM | 92204A702 | 681 | 1,924 | SH | SOLE | 0 | 0 | 1,924 | ||
| Visa Inc Cl A | COM | 92826c839 | 258 | 1,179 | SH | SOLE | 0 | 0 | 1,179 | ||
| Walt Disney | COM | 254687106 | 508 | 2,802 | SH | SOLE | 0 | 0 | 2,802 | ||
| Waste Management Inc Del | COM | 94106L109 | 413 | 3,500 | SH | SOLE | 0 | 0 | 3,500 | ||
| Workday Inc Cl A | COM | 98138h101 | 218 | 911 | SH | SOLE | 0 | 0 | 911 | ||
| Spdr Series Trust S&P Biotech | COM | 78464a870 | 490 | 3,482 | SH | SOLE | 0 | 0 | 3,482 | ||