SEC FORM 13F-HR

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 COVER PAGE
OMB APPROVAL
OMB Number: 3235-0006
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hours per response: 23.8
Report for the Calendar Year or Quarter Ended: 03-31-2015
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: DAVIDSON D A & CO
Address: 8 THIRD ST NORTH
GREAT FALLS, MT  59401
Form 13F File Number: 028-07602
CRD Number (if applicable):
SEC File Number (if applicable):

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: Joely Meighan
Title: SVP, Director of Managed Assets
Phone: 206-289-4075
Signature, Place, and Date of Signing:
Joely Meighan Seattle,  WA 04-24-2015
[Signature] [City, State] [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).)
X 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).)
List of Other Managers Reporting for this Manager:
[If there are no entries in this list, omit this section.]
Name Form 13F File No. CRD No. (if applicable) SEC File No. (if applicable) CIK
Alta Capital Management 028-05119      
Ashfield Capital Partners LLC        
Aston Asset Management        
Atalanta Sosnoff Management        
C.S. McKee        
Confluence Inv Management LLC        
Contravisory        
D. A. Davidson & Co.        
Davidson Investment Advisors 028-10301      
Davis Investment Advisors        
Eagle Asset Management 028-01666      
Efficient Market Advisors        
Elessar Investment Management, LLC        
Estabrook Capital Management 028-01283      
F-Squared AlphaSector        
Granite Investment Partners        
Hahn        
Harding Loevner        
Hays Advisory 028-10649      
John Hancock Asset Management 028-03955      
Kelly Capital Management        
Legg Mason        
Lesa Sroufe & Co.        
Marshfield Associates Inc        
McDonnell Investment Mgmt        
Miller, Tabak & Co. LLC        
Nuveen        
Oak Ridge Investments 028-06668      
Ocean Park        
Pacific Income Advisors        
Parametric Portfolio Associates        
Placemark        
RNC Genter Capital Management 028-00970      
Reinhart Partners, Inc.        
Riverbridge Partners, LLC        
SFE Investment Counsel        
SIGMA        
Sage Advisory Services, Ltd. Co.        
SeaCap Investment Advisors        
Sovereign        
Sterling Capital        
Thornburg Investment Management 028-06605      
Todd Investment Advisors        
Uniplan Real Estate Advisors        
Victory Capital Management        
Wedgewood Partners, Inc.        
Form 13F Summary Page
Report Summary:
Number of Other Included Managers: 46
Form 13F Information Table Entry Total: 4,453
Form 13F Information Table Value Total: 3,046,591,000
(round to nearest dollar)
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. Name Form 13F File No. CRD No. (if applicable) SEC File No. (if applicable) CIK
1 Alta Capital Management 028-05119      
2 Ashfield Capital Partners LLC        
3 Aston Asset Management        
4 Atalanta Sosnoff Management        
5 C.S. McKee        
6 Confluence Inv Management LLC        
7 Contravisory        
8 D. A. Davidson & Co.        
9 Davidson Investment Advisors 028-10301      
10 Davis Investment Advisors        
11 Eagle Asset Management 028-01666      
12 Efficient Market Advisors        
13 Elessar Investment Management, LLC        
14 Estabrook Capital Management 028-01283      
15 F-Squared AlphaSector        
16 Granite Investment Partners        
17 Hahn        
18 Harding Loevner        
19 Hays Advisory 028-10649      
20 John Hancock Asset Management 028-03955      
21 Kelly Capital Management        
22 Legg Mason        
23 Lesa Sroufe & Co.        
24 Marshfield Associates Inc        
25 McDonnell Investment Mgmt        
26 Miller, Tabak & Co. LLC        
27 Nuveen        
28 Oak Ridge Investments 028-06668      
29 Ocean Park        
30 Pacific Income Advisors        
31 Parametric Portfolio Associates        
32 Placemark        
33 RNC Genter Capital Management 028-00970      
34 Reinhart Partners, Inc.        
35 Riverbridge Partners, LLC        
36 SFE Investment Counsel        
37 SIGMA        
38 Sage Advisory Services, Ltd. Co.        
39 SeaCap Investment Advisors        
40 Sovereign        
41 Sterling Capital        
42 Thornburg Investment Management 028-06605      
43 Todd Investment Advisors        
44 Uniplan Real Estate Advisors        
45 Victory Capital Management        
46 Wedgewood Partners, Inc.