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

FORM 13F COVER PAGE
OMB APPROVAL
OMB Number:3235-0006
Expires:July 31, 2015
Estimated average burden
hours per response:23.8
Report for the Calendar Year or Quarter Ended:
03-31-2023
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:
DUDLEY & SHANLEY, INC.
Address:
205 WORTH AVENUE
#311
PALM BEACH, FL 33480
Form 13F File Number:
028-03037

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:
Frank E. Shanley
Title:
President
Phone:
561-855-4742


Signature, Place, and Date of Signing:

Frank E. Shanley
                         [Signature]
Palm Beach, FLORIDA
                 [City, State]
04-13-2023
                           [Date]
                          

Report Type (Check only one.):

☒ 13F HOLDINGS REPORT. (Check here if all holdings of this reporting manager are reported in this report.) 

☐ 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).)


Form 13F Summary Page

Report Summary:

Number of Other Included Managers:
0
Form 13F Information table Entry Total:
37
Form 13F Information table Value Total:
521356312
          (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.]

  
NONE


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

FORM 13F INFORMATION TABLE
OMB APPROVAL
OMB Number:3235-0006
Expires:July 31, 2015
Estimated average burden
hours per response:23.8
COLUMN 1COLUMN 2COLUMN 3COLUMN 4COLUMN 5COLUMN 6COLUMN 7COLUMN 8
VALUESHRS ORSH/PUT/INVESTMENTOTHERVOTING AUTHORITY
NAME OF ISSUERTITLE OF CLASSCUSIP(x$1000)PRN AMTPRNCALLDISCRETIONMANAGERSOLESHAREDNONE
ABM IndustriesCOM00095710017,379,601386,729SHSOLE386,729 0 0
ALPS Cln Energy ETFCOM00162Q4602,419,80452,050SHSOLE52,050 0 0
Allison TransmissionCOM01973R10119,107,793422,365SHSOLE422,365 0 0
Amdocs Ltd.COMG0260210318,171,757189,230SHSOLE189,230 0 0
Amer. Water WorksCOM03042010318,766,101128,105SHSOLE128,105 0 0
Ametek Inc.COM03110010018,758,324129,074SHSOLE129,074 0 0
Amphenol Corp.COM03209510118,215,388222,900SHSOLE222,900 0 0
Analog DevicesCOM0326541056,992,43535,455SHSOLE35,455 0 0
Aon plcCOMg0403h10834,886,208110,648SHSOLE110,648 0 0
Avantor Inc.COM05352A10022,374,8931,058,415SHSOLE1,058,415 0 0
Clear Secure Inc.COM18467V109308,80611,800SHSOLE11,800 0 0
Danaher Corp.COM23585110222,721,40690,150SHSOLE90,150 0 0
Ecolab Inc.COM27886510017,591,204106,272SHSOLE106,272 0 0
Fiserv Inc.COM33773810828,043,873248,110SHSOLE248,110 0 0
Franklin Elec. Co., Inc.COM35351410212,582,111133,710SHSOLE133,710 0 0
Freeport-McMoRanCOM35671D857357,9628,750SHSOLE8,750 0 0
Generac HoldingsCOM3687361042,127,79719,700SHSOLE19,700 0 0
HEICO Corp.COM4228061091,340,9547,840SHSOLE7,840 0 0
Invesco Water ETFCOM46137V1421,748,81332,780SHSOLE32,780 0 0
Iridium Comm.COM46269C10230,009,110484,565SHSOLE484,565 0 0
Kadant Inc.COM48282T1041,394,9996,690SHSOLE6,690 0 0
Kornit DigitalCOMM6372Q1131,049,69954,220SHSOLE54,220 0 0
Microsoft Corp.COM5949181043,757,70213,034SHSOLE13,034 0 0
NexGen Energy Ltd.COM65340P1064,738,5771,235,500SHSOLE1,235,500 0 0
Ormat TechnologiesCOM6866881021,763,21620,800SHSOLE20,800 0 0
Peabody Energy Corp.COM704551100312,32012,200SHSOLE12,200 0 0
Progressive Corp.COM74331510331,486,075220,090SHSOLE220,090 0 0
Roper TechnologiesCOM7766961061,123,7592,550SHSOLE2,550 0 0
Ryan Specialty HldngsCOM78351F10718,793,287467,030SHSOLE467,030 0 0
Service Corp. Int'lCOM81756510427,177,936395,143SHSOLE395,143 0 0
The TJX CompaniesCOM87254010918,217,290232,482SHSOLE232,482 0 0
Visa Inc.COM92826C83922,848,116101,340SHSOLE101,340 0 0
Wabtec Corp.COM9297401088,034,27079,500SHSOLE79,500 0 0
Watsco, Inc.COM9426222008,109,89825,490SHSOLE25,490 0 0
West Pharm Svcs IncCOM95530610510,200,07729,440SHSOLE29,440 0 0
Wheaton Precious MtlsCOM96287910217,137,736355,850SHSOLE355,850 0 0
Wheaton Precious MtlsCOM96287910251,307,0151,065,345SHSOLE1,065,345 0 0