UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 13F
FORM 13F COVER PAGE
Report for the Calendar Year or Quarter Ended: December 31, 1999
Institutional Investment Manager Filing this Report:
Name: Cohen, Klingenstein & Marks Incorporated
Address: 2112 Broadway
Suite 417
New York, NY 10023
13F File Number: 801-17119
The institutional investment manager filing this report and the
person by whom it is signed hereby represent that the person
signing the report is authorized to submit it, that all
information contained herein is true, correct and complete, and
that it is understood that all required items, statements,
schedules, lists, and tables, are considered integral parts of
this form.
Person Signing this Report on Behalf of Reporting Manager:
Name: George M. Cohen
Title: Princial
Phone: 212-799-4880
Signature, Place, and Date of Signing:
George M. Cohen New York, New York January 31, 2000
Report Type (Check only one.):
[ X] 13F Holdings Report
[ ] 13F Notice
[ ] 13F Combination Report
List of Other Managers Reporting for this Manager:
None
I AM SIGNING THIS REPORT AS REQUIRED BY THE SECURITIES EXCHANGE
ACT OF 1934.
<PAGE>
FORM 13F SUMMARY PAGE
Report Summary:
Number of Other Included Managers: 0
Form 13F Information Table Entry Total: 83190
Form 13F Information Table Value Total: $3,629,890
<PAGE>
<TABLE>
<C> <C> <C> <C> <C> <C> <C>
Form 13F Information Table
Value Shares/ Investment Voting
Name of Issuer Title of Cusip (x$1000) Discretion Authority
Abbott Labs com 00282410 82,138,112 2,261,979 sole sole
Abgenix com 00339B10 458,450 3,460 sole sole
Adaptec Inc. com 00651F10 463,838 9,300 sole sole
ADC Telecomm. com 00088610 375,148 5,170 sole sole
Adobe Systems Inc com 00724F10 430,400 6,400 sole sole
Advanced Micro De com 00790310 232,223 8,025 sole sole
Affymetrix Inc. com 00826T10 1,230,234 7,250 sole sole
Alkermes com 01642T10 343,875 7,000 sole sole
Allstate Corp. com 02000210 762,781 31,700 sole sole
Amerada Hess Corp com 02355110 292,717 5,158 sole sole
America Online com 02364J10 511,398 6,740 sole sole
American Express com 02581610 4,249,350 25,560 sole sole
American Home Pro com 02660910 74,221,318 1,890,989 sole sole
American Int'l Gr com 02687410 15,729,430 145,475 sole sole
Americredit Corp. com 03060R10 214,600 11,600 sole sole
Amgen Inc. com 03116210 173,892,470 2,895,192 sole sole
AT&T Corp. com 00195710 1,378,543 27,130 sole sole
AT&T Lbty Media A com 00195720 1,458,718 25,676 sole sole
Automatic Data com 05301510 282,844 5,250 sole sole
Autonation Inc. com 05329W10 231,250 25,000 sole sole
Avon Products Inc com 05430310 83,078,919 2,517,543 sole sole
Bank of Amer. Cor com 06050510 2,877,249 57,330 sole sole
Banta Corp. com 06682110 304,594 13,500 sole sole
Bea Systems com 07332510 798,686 11,420 sole sole
Becton, Dickinson com 07588710 86,989,026 3,229,291 sole sole
Bed, Bath & Beyon com 07589610 107,873,973 3,104,287 sole sole
Berkshire Hathawa com 08467020 1,257,210 687 sole sole
Biogen Inc. com 09059710 283,920 3,360 sole sole
Biovail Corp. Int com 09067K10 450,000 4,800 sole sole
Boston Scientific com 10113710 84,481,622 3,862,017 sole sole
BP Amoco PLC com 05562210 313,882 5,292 sole sole
Bristol-Myers Squ com 11012210 95,020,479 1,480,358 sole sole
Burlington N Sant com 12189T10 611,100 25,200 sole sole
Capital One Finan com 14040H10 303,581 6,300 sole sole
Cisco Systems Inc com 17275R10 176,408,228 1,646,751 sole sole
Clear Channel Com com 18450210 321,300 3,600 sole sole
CMG Investments com 12575010 553,750 2,000 sole sole
CNET Inc. com 12594510 634,465 11,180 sole sole
Coca-Cola Co. com 19121610 89,658,924 1,539,209 sole sole
Cognex Corp. com 19242210 291,720 7,480 sole sole
Colgate-Palmolive com 19416210 215,410 3,314 sole sole
Comair Holdings I com 19978910 239,828 10,260 sole sole
Comcast Cl A SPL com 20030020 885,349 17,510 sole sole
Comcast Corp. Cl com 20030010 340,391 7,110 sole sole
Computer Assoc. I com 20491210 142,146,671 2,032,481 sole sole
Computer Sciences com 20536310 289,553 3,060 sole sole
Compuware Corp com 20563810 126,944,648 3,407,910 sole sole
Conseco, Inc. com 20846410 72,060,968 4,045,528 sole sole
Corn Products Int com 21902310 284,925 8,700 sole sole
Delta and Pine La com 24735710 617,716 35,552 sole sole
Dollar General com 25666910 86,017,721 3,780,999 sole sole
Donnelley (R.R.) com 25786710 794,000 32,000 sole sole
Eclipsys Corp. com 27885610 281,875 11,000 sole sole
Electronic Arts com 28551210 421,680 5,020 sole sole
Electronic Data S com 28566110 325,316 4,860 sole sole
Eli Lilly com 53245710 4,442,200 66,800 sole sole
EMC Corp. com 26864810 172,988,635 1,583,420 sole sole
Expeditors Int'l com 30213010 350,500 8,000 sole sole
Extended Stay Ame com 30224P10 242,000 32,000 sole sole
Federated Dept. S com 31410H10 303,375 6,000 sole sole
Fox Entertainment com 35138T10 274,313 11,000 sole sole
Franklin Resource com 35461310 88,824,828 2,770,365 sole sole
Fritz Cos Inc. com 35884610 225,750 21,500 sole sole
Gannett Co. Inc. com 36473010 3,074,906 37,700 sole sole
Gap Inc. com 36476010 115,922,576 2,520,056 sole sole
Gateway Inc. com 36783310 677,388 9,400 sole sole
General Electric com 36960410 10,129,316 65,456 sole sole
Gilat Satellite com 2369464 308,750 2,600 sole sole
Gilead Sciences I com 37555810 202,969 3,750 sole sole
Glaxo Wellcome AD com 37733W10 3,972,713 71,100 sole sole
Globalstar Teleco com 2373700 343,200 7,800 sole sole
Guidant Corp com 40169810 244,400 5,200 sole sole
Healthsouth com 42192410 295,625 55,000 sole sole
Hewlett Packard com 42823610 440,213 3,870 sole sole
HNC Software Inc. com 40425P10 523,463 4,950 sole sole
Home Depot com 43707610 265,031 3,855 sole sole
Immunex Corp. com 45252810 678,900 6,200 sole sole
Incyte Pharm. com 45337c10 516,000 8,600 sole sole
Intel Corp. com 45814010 125,902,484 1,529,567 sole sole
Intermedia Comm. com 45880110 276,345 7,120 sole sole
Jabil Circuit Inc com 46631310 397,120 5,440 sole sole
JDS Uniphase Corp com 46612j10 1,277,595 7,920 sole sole
JLK Direct Dist. com 46621C10 108,281 10,500 sole sole
Johnson & Johnson com 47816010 1,915,355 20,540 sole sole
Kansas City So. I com 48517010 2,865,600 38,400 sole sole
Kohls Corp. com 50025510 200,320 2,775 sole sole
LAM Research Corp com 51280710 602,438 5,400 sole sole
Legato Systems In com 52465110 602,798 8,760 sole sole
Lucent com 54946310 201,600 2,688 sole sole
MBNA Corp. com 55262L10 103,627,240 3,802,835 sole sole
McDonald's Corp. com 58013510 96,517,034 2,394,221 sole sole
MCI Worldcom Inc. com 55268B10 101,801,136 1,918,514 sole sole
McKessonHBOC com 58155Q10 79,915,028 3,551,779 sole sole
Merck & Co. com 58933110 95,535,989 1,421,931 sole sole
Mercury Interacti com 58940510 361,591 3,350 sole sole
Microsoft Corp. com 59491810 503,076 4,309 sole sole
Mid Atlantic Medi com 59523C10 147,963 17,800 sole sole
Nat'l Semiconduct com 63764010 401,367 9,375 sole sole
Network Appliance com 64120L10 963,525 11,600 sole sole
Neurocrine Biosc. com 64125C10 438,075 17,700 sole sole
Nextlink Comm. com 65333h70 548,213 6,600 sole sole
Nordstrom Inc. com 65566410 968,247 36,798 sole sole
Oracle Corp. com 68389X10 230,421,372 2,056,186 sole sole
Parametric Tech. com 69917310 146,646,140 5,418,795 sole sole
PepsiCo Inc. com 71344810 3,916,275 111,100 sole sole
Philip Morris com 71815410 600,300 26,100 sole sole
Pogo Producing com 73044810 824,841 40,483 sole sole
Primedia Inc. com 74157k10 247,500 15,000 sole sole
Providian Financi com 74406A10 100,866,949 1,107,667 sole sole
Psinet Inc. com 74437C10 605,150 9,800 sole sole
QRS Corp. com 74726x10 504,000 4,800 sole sole
QuadraMed Corp. com 74730W10 348,750 40,000 sole sole
Qualcomm Inc. com 74752510 2,169,860 12,320 sole sole
Rational Software com 75409P20 353,700 7,200 sole sole
Safeguard Scienti com 78644910 1,137,088 6,976 sole sole
SBC Communication com 78387G10 372,596 7,643 sole sole
Scientific-Atlant com 80865510 290,550 5,200 sole sole
Seagate Technolog com 81180410 147,534,213 3,168,520 sole sole
Sealed Air Corp. com 81211K10 1,885,975 36,400 sole sole
Solectron Corp. com 83418210 534,603 5,620 sole sole
Sprint PCS Grp. com 85206150 175,214,781 1,709,413 sole sole
Storage Technolog com 86211120 248,906 13,500 sole sole
Stryker Corp. com 86366710 431,675 6,200 sole sole
Sun Microsystems com 86681010 658,219 8,500 sole sole
Sunrise Assist. L com 86768K10 328,625 23,900 sole sole
Tandy Corp. com 87538210 103,522,718 2,104,655 sole sole
Telefonos Mexico com 87940378 551,250 4,900 sole sole
Telephone & Data com 87943310 630,000 5,000 sole sole
Tellabs Inc. com 87966410 311,309 4,850 sole sole
Time Warner Inc. com 88731510 2,834,650 39,200 sole sole
Tricon Global Res com 89595310 483,199 12,510 sole sole
U.S. Bancorp com 90297310 75,614,474 3,175,411 sole sole
Univisions Comm. com 91490610 586,556 5,740 sole sole
Vertex Pharma. com 92532F10 234,500 6,700 sole sole
Vitesse Semicon. com 92849710 440,475 8,400 sole sole
Walt Disney Co. com 25468710 7,579,143 259,116 sole sole
Washington Post ' com 93964010 2,751,581 4,950 sole sole
Waters Corp. com 94184810 356,160 6,720 sole sole
Western Digital com 95810210 50,250 12,000 sole sole
Xerox Corp. com 98412110 72,787,331 3,208,257 sole sole
Xilinx Inc. com 98391910 412,856 9,080 sole sole
</TABLE>
