<PAGE>
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
Form 13F
Form 13F COVER PAGE
Report for the Calendar Year or Quarter Ended: 9/30/99
-----------------------
Check Here if Amendment / /; Amendment Number:
---------
This Amendment (Check only one.): / / is a restatement.
/ / adds new holdings entries.
Institutional Investment Manager Filing this Report:
Name: Mairs and Power, Inc.
-------------------------------
Address: 332 Minnesota St. # W-1420
-------------------------------
St. Paul, MN 55101
-------------------------------
-------------------------------
Form 13F File Number: 28-
---------------------
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: William B. Frels
-------------------------------
Title: Compliance Officer
-------------------------------
Phone: 651-222-8478
-------------------------------
Signature, Place, and Date of Signing:
St. Paul, MN 5/13/99
- ------------------------------- ----------------- -------------
[Signature] [City, State] [Date]
Report Type (Check only one.):
/X/ 13F HOLDINGS REPORT. (Check here if all holdings of this reporting
manager are reported in this report.)
<PAGE>
/ / 13F NOTICE. (Check here if no holdings reported are in this report,
and all holdings are reported by other reporting manager(s).)
/ / 13F COMBINATION REPORT. (Check here if a portion of the holdings for
this reporting manager are reported in this report and a portion are
reported by other reporting manager(s).)
<PAGE>
Form 13F SUMMARY PAGE
Report Summary:
Number of Other Included Managers: 0
--------------------
Form 13F Information Table Entry Total: 108
--------------------
Form 13F Information Table Value Total: $ 820,328
--------------------
(thousands)
List of Other Included Managers:
Provide a numbered list of the name(s) and Form 13F file number(s) of all
institutional investment managers with respect to which this report is filed,
other than the manager filing this report.
[If there are no entries in this list, state "NONE" and omit the column headings
and list entries.]
No. Form 13F File Number Name
28-
------ ----------------- ---------------------------------
[Repeat as necessary.]
<PAGE>
FORM 13F
Mairs and Power, Inc.
Discretionary Clients' Holdings as of 09-30-99
<TABLE>
<CAPTION>
Item 1 Item 2 Item 3 Item 4 Item 5 Item 6 Item 7 Item 8
Title of Market
Name of Issuer Class CUSIP Value Shares SH/PRN Invstmt Managers Voting
Discr Authority
COMMON STOCK SOLE
<S> <C> <C> <C> <C> <C> <C> <C> <C>
Abbott Laboratories COM 002824100 1,113,466 30,350 SHR SOLE 30,350
ADC Telecom COM 000886101 32,765,769 781,300 SHR SOLE 781,300
Aegon NV COM 007924103 400,495 4,630 SHR SOLE 4,630
Allstate Corp COM 020002101 363,489 14,576 SHR SOLE 14,576
Am Home Products COM 026609107 1,079,000 26,000 SHR SOLE 26,000
American Express COM 025816109 1,410,615 10,449 SHR SOLE 10,449
American Greetings COM 026375105 1,785,762 69,350 SHR SOLE 69,350
Amgen COM 031162100 440,100 5,400 SHR SOLE 5,400
Archer-Daniels COM 039483102 243,730 20,101 SHR SOLE 20,101
AT & T COM 001957109 855,640 19,670 SHR SOLE 19,670
Automatic Data Proc COM 053015103 358,339 8,030 SHR SOLE 8,030
Bank of America Corp COM 060505104 445,500 8,000 SHR SOLE 8,000
Bankamerica Corp COM 066050105 1,622,841 29,142 SHR SOLE 29,142
Baxter International COM 071813109 20,824,207 345,630 SHR SOLE 345,630
Bemis COM 081437105 16,895,156 498,750 SHR SOLE 498,750
Bestfoods COM 08658U101 203,574 4,192 SHR SOLE 4,192
BMC Industries COM 055607105 14,034,711 1,139,875 SHR SOLE 1,139,875
BP Amoco PLC ADR COM 055622104 4,412,494 39,819 SHR SOLE 39,819
Briggs & Stratton COM 109043109 350,250 6,000 SHR SOLE 6,000
Bristol-Myers Squibb COM 110122108 5,412,150 80,180 SHR SOLE 80,180
Burlington Northern COM 12189T104 13,474,725 489,990 SHR SOLE 489,990
Burlington Resources COM 122014103 1,795,862 48,867 SHR SOLE 48,867
Capital Title Group Inc COM 140919101 700,000 320,000 SHR SOLE 320,000
Cardinal Health COM 14149Y108 484,777 8,895 SHR SOLE 8,895
Ceridian COM 15677T106 12,820,575 515,400 SHR SOLE 515,400
Chevron COM 166751107 893,979 10,073 SHR SOLE 10,073
Cisco COM 17275R102 517,647 7,550 SHR SOLE 7,550
<PAGE>
<CAPTION>
FORM 13F
Mairs and Power, Inc.
Discretionary Clients' Holdings as of 09-30-99
Item 1 Item 2 Item 3 Item 4 Item 5 Item 6 Item 7 Item 8
Title of Market
Name of Issuer Class CUSIP Value Shares SH/PRN Invstmt Managers Voting
<S> <C> <C> <C> <C> <C> <C> <C> <C>
Community First Bankshares COM 203902101 421,875 25,000 SHR SOLE 25,000
Corning COM 219350105 6,591,462 96,138 SHR SOLE 96,138
Covance Inc. COM 222816100 730,680 75,425 SHR SOLE 75,425
Dayton Hudson COM 239753106 29,185,570 485,920 SHR SOLE 485,920
Delta Air Lines COM 247361108 1,062,926 21,916 SHR SOLE 21,916
Deluxe Corp COM 248019101 18,775,582 552,223 SHR SOLE 552,223
Donaldson COM 257651109 17,097,164 737,344 SHR SOLE 737,344
Dupont COM 263534109 347,512 5,744 SHR SOLE 5,744
Eastman Kodak COM 277461109 311,046 4,113 SHR SOLE 4,113
Ecolab Inc COM 278865100 19,932,003 584,088 SHR SOLE 584,088
Emerson Electric COM 291011104 28,589,311 452,452 SHR SOLE 452,452
Enron Corp COM 293561106 806,467 19,640 SHR SOLE 19,640
Exxon Corp COM 302290101 1,985,424 26,124 SHR SOLE 26,124
Firstar COM 33761C103 2,268,325 88,520 SHR SOLE 88,520
Firstar Corporation COM 33763V109 584,250 22,800 SHR SOLE 22,800
G & K Services Cl A COM 361268105 2,191,050 54,100 SHR SOLE 54,100
General Binding COM 369154109 202,500 10,000 SHR SOLE 10,000
General Electric COM 369604103 1,502,898 12,676 SHR SOLE 12,676
General Mills COM 370334104 22,990,243 283,393 SHR SOLE 283,393
Genuine Parts COM 372460105 371,875 14,000 SHR SOLE 14,000
Gillette Company COM 375766102 291,862 8,600 SHR SOLE 8,600
Graco Inc COM 384109104 28,132,387 857,368 SHR SOLE 857,368
GTE Corp COM 362320103 3,228,416 41,996 SHR SOLE 41,996
HB Fuller COM 359694106 19,171,364 314,930 SHR SOLE 314,930
Hershey COM 427866108 620,279 12,740 SHR SOLE 12,740
Hewlett-Packard COM 428236103 417,450 4,600 SHR SOLE 4,600
Home Depot COM 437076102 322,537 4,700 SHR SOLE 4,700
Honeywell Inc COM 438506107 28,050,750 252,000 SHR SOLE 252,000
Hormel COM 440452100 26,045,466 630,450 SHR SOLE 630,450
IBM COM 459200101 3,960,814 32,734 SHR SOLE 32,734
<PAGE>
<CAPTION>
FORM 13F
Mairs and Power, Inc.
Discretionary Clients' Holdings as of 09-30-99
Item 1 Item 2 Item 3 Item 4 Item 5 Item 6 Item 7 Item 8
Title of Market
Name of Issuer Class CUSIP Value Shares SH/PRN Invstmt Managers Voting
<S> <C> <C> <C> <C> <C> <C> <C> <C>
Imation COM 45245A107 289,819 9,349 SHR SOLE 9,349
Ingersoll Rand COM 456866102 553,495 10,075 SHR SOLE 10,075
Intel COM 458140100 3,498,038 47,072 SHR SOLE 47,072
Intl Flavors/Fragr COM 459506101 241,500 7,000 SHR SOLE 7,000
J.P. Morgan COM 616880100 1,045,387 9,150 SHR SOLE 9,150
Jefferson-Pilot COM 475070108 319,855 5,062 SHR SOLE 5,062
Johnson & Johnson COM 478160104 27,388,948 298,111 SHR SOLE 298,111
Jostens Inc COM 481088102 6,420,741 335,725 SHR SOLE 335,725
Kimberly-Clark COM 494368103 3,122,800 59,200 SHR SOLE 59,200
Lucent Tech COM 549463107 323,077 4,980 SHR SOLE 4,980
Medtronic Inc COM 585055106 32,625,749 917,420 SHR SOLE 917,420
Merck & Co COM 589331107 2,029,409 31,312 SHR SOLE 31,312
Merrill Corp COM 590175105 25,537,944 1,280,900 SHR SOLE 1,280,900
Merrill Lynch COM 590188108 1,107,308 16,435 SHR SOLE 16,435
MicroEar COM 5,000 50,000 SHR SOLE 50,000
Microsoft COM 594918104 344,862 3,808 SHR SOLE 3,808
Minnesota Mining COM 604059105 31,500,335 327,915 SHR SOLE 327,915
Mobil Corp COM 607059102 1,541,475 15,300 SHR SOLE 15,300
Monsanto COM 611662107 218,407 6,120 SHR SOLE 6,120
Motorola COM 620076109 1,280,400 14,550 SHR SOLE 14,550
MTS Systems COM 553777103 17,772,375 1,713,000 SHR SOLE 1,713,000
Murphy Oil COM 626717102 335,187 6,200 SHR SOLE 6,200
Natl Computer Sys COM 635519101 28,532,351 744,120 SHR SOLE 744,120
Newell Rubbermaid COM 651192106 665,506 23,300 SHR SOLE 23,300
Nokia COM 654902204 323,550 3,600 SHR SOLE 3,600
Northern States Pwr COM 665772109 208,294 9,660 SHR SOLE 9,660
Osmonics COM 688350107 137,312 13,000 SHR SOLE 13,000
Pacific Centy Finl Corp. COM 694058108 1,124,062 55,000 SHR SOLE 55,000
Patterson Dental COM 703412106 2,022,150 40,800 SHR SOLE 40,800
Pentair Inc COM 709631105 1,540,800 38,400 SHR SOLE 38,400
<PAGE>
<CAPTION>
FORM 13F
Mairs and Power, Inc.
Discretionary Clients' Holdings as of 09-30-99
Item 1 Item 2 Item 3 Item 4 Item 5 Item 6 Item 7 Item 8
Title of Market
Name of Issuer Class CUSIP Value Shares SH/PRN Invstmt Managers Voting
<S> <C> <C> <C> <C> <C> <C> <C> <C>
Pfizer Inc COM 717081103 28,527,441 795,190 SHR SOLE 795,190
Procter & Gamble COM 742718109 834,375 8,900 SHR SOLE 8,900
Providian Financial COM 74406A102 412,250 5,206 SHR SOLE 5,206
ReliaStar COM 75952U103 16,152,850 485,800 SHR SOLE 485,800
Royal Dutch Petrol COM 780257804 1,517,906 25,700 SHR SOLE 25,700
Schlumberger Ltd COM 806857108 4,039,096 64,820 SHR SOLE 64,820
Sigma Aldrich COM 826552101 701,675 22,100 SHR SOLE 22,100
Silicon Graphics COM 827056102 803,906 73,500 SHR SOLE 73,500
St. Jude Medical COM 790849103 16,216,987 514,825 SHR SOLE 514,825
St. Paul Cos COM 792860108 17,912,565 651,366 SHR SOLE 651,366
Sturm Ruger COM 864159108 288,000 32,000 SHR SOLE 32,000
Super Valu COM 868536103 16,156,369 732,300 SHR SOLE 732,300
TCF Financial COM 872275102 21,402,624 749,326 SHR SOLE 749,326
Toro COM 891092108 16,340,649 437,208 SHR SOLE 437,208
TSI Inc COM 872876107 14,479,655 1,179,005 SHR SOLE 1,179,005
United Healthcare COM 910581107 301,862 6,200 SHR SOLE 6,200
US Bancorp COM 902973106 23,574,204 780,926 SHR SOLE 780,926
US West Inc New COM 91273H101 922,644 16,169 SHR SOLE 16,169
Valspar COM 920355104 6,135,444 187,700 SHR SOLE 187,700
Wells Fargo & Co COM 669380107 35,798,533 903,433 SHR SOLE 903,433
Weyerhaeuser COM 962166104 3,434,450 59,600 SHR SOLE 59,600
COMMON STOCK SUBTOTAL 819,903,962 24,101,791 24,101,791
PREFERRED STOCK
Barclays Pfd. E 06738C83 423,937 17,000 SHR SOLE 17,000
PREFERRED STOCK SUBTOTAL 423,937 17,000 17,000
<PAGE>
<CAPTION>
FORM 13F
Mairs and Power, Inc.
Discretionary Clients' Holdings as of 09-30-99
Item 1 Item 2 Item 3 Item 4 Item 5 Item 6 Item 7 Item 8
Title of Market
Name of Issuer Class CUSIP Value Shares SH/PRN Invstmt Managers Voting
<S> <C> <C> <C> <C> <C> <C> <C> <C>
GRAND TOTALS 820,327,899 24,118,791 24,118,791
</TABLE>