a_incomesecuritiestrust.htm

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

FORM N-Q

QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED
MANAGEMENT INVESTMENT COMPANIES

Investment Company Act file number 811- 4186

John Hancock Income Securities Trust
(Exact name of registrant as specified in charter)

601 Congress Street, Boston, Massachusetts 02210
(Address of principal executive offices) (Zip code)

Alfred P. Ouellette, Senior Attorney and Assistant Secretary

601 Congress Street

Boston, Massachusetts 02210

(Name and address of agent for service)

Registrant's telephone number, including area code: 617-663-4324

Date of fiscal year end:  December 31 
 
Date of reporting period:  September 30, 2006 


ITEM 1. SCHEDULE OF INVESTMENTS


John Hancock
Income Securities Trust
Securities owned by the Fund on
September 30, 2006 (unaudited)

  Interest  Maturity  Credit  Par value   
Issuer, description  rate (%)  date  rating (A)  ($000)  Value 
Bonds 58.22%          $149,408,215 
(Cost $149,943,181)           
 
Advertising 0.18%          456,250 
R.H. Donnelley Corp.,           
Sr Disc Note Ser A-1  6.875  01-15-13  B  200  182,500 
Sr Disc Note Ser A-2  6.875  01-15-13  B  300  273,750 
 
Airlines 0.38%          968,704 
Continental Airlines, Inc.,           
Pass Thru Ctf Ser 1999-1Class A  6.545  02-02-19  A-  372  378,303 
Pass Thru Ctf Ser 2000-2           
Class B (L)  8.307  10-02-19  BB-  411  399,047 
Pass Thru Ctf Ser 2001-1 Class C  7.033  06-15-11  B+  196  191,354 
 
Auto Parts & Equipment 0.08%          194,000 
Avis Budget Car Rental LLC,           
Sr Note (S)  7.625  05-15-14  BB-  200  194,000 
 
Broadcasting & Cable TV 0.58%          1,490,380 
Clear Channel Communications, Inc.,           
Note  5.500  09-15-14  BBB-  460  427,381 
Comcast Corp.,           
Gtd Note  5.900  03-15-16  BBB+  450  450,207 
Cox Communications, Inc.,           
Note  7.125  10-01-12  BBB-  575  612,792 
 
Casinos & Gaming 1.79%          4,586,901 
Chukchansi Economic Development Auth,           
Sr Note (S)  8.000  11-15-13  BB-  460  472,075 
Jacobs Entertainment, Inc.,           
Sr Note (S)  9.750  06-15-14  B-  310  306,900 
Little Traverse Bay Bands of Odawa Indians,           
Sr Note (S)  10.250  02-15-14  B  405  403,987 
Majestic Star Casino LLC/Majestic Star Casino           
Capital II LLC,           
Sr Note  9.750  01-15-11  CCC+  750  730,312 
Mashantucket West Pequot,           
Bond (S)  5.912  09-01-21  BBB-  285  274,093 
MTR Gaming Group, Inc.,           
Sr Sub Note (S)  9.000  06-01-12  B-  105  105,525 
Pokagon Gaming Auth,           
Sr Note (S)  10.375  06-15-14  B  175  186,594 
Turning Stone Casino Resort Enterprise,           
Sr Note (S)  9.125  09-15-14  B+  1,540  1,555,400 

Page 1

John Hancock
Income Securities Trust
Securities owned by the Fund on
September 30, 2006 (unaudited)

Waterford Gaming LLC,             
Sr Note (S)    8.625  09-15-12  BB-  522  552,015 
 
Commodity Chemicals 0.20%            511,250 
Lyondell Chemical Co.,             
Gtd Sr Sub Note    10.875  05-01-09  B  500  511,250 
 
Construction & Farm Machinery & Heavy Trucks 0.19%          492,500 
Manitowoc Co., Inc. (The),             
Gtd Sr Note    7.125  11-01-13  BB-  500  492,500 
 
Consumer Finance 2.11%            5,424,270 
American Express Co.,             
Sub Deb    6.800  09-01-66  A  545  575,382 
Capital One Capital III,             
Gtd Jr Sub Note    7.686  08-15-36  BB+  855  910,996 
Ford Motor Credit Co.,             
Note    7.375  10-28-09  BBB-  1,625  1,579,181 
Sr Note    9.875  08-10-11  B  295  305,270 
General Motors Acceptance Corp.,             
Note    6.750  12-01-14  BB  550  536,940 
HSBC Finance Capital Trust IX,             
Note (5.911% to 11-30-15 then             
variable)    5.911  11-30-35  BBB+  800  799,814 
Nelnet, Inc.,             
Note    7.400  09-29-36  BBB-  715  716,687 
 
Department Stores 0.28%            721,855 
Penney, J.C. Co., Inc.,             
Deb    8.125  04-01-27  BB+  215  222,128 
Deb    7.650  08-15-16  BBB-  445  499,727 
 
Diversified Banks 1.60%            4,107,406 
Bank of New York,             
Cap Security (S)    7.780  12-01-26  A-  650  677,148 
Barclays Bank Plc,             
Perpetual Bond (6.86% to 06-15-32             
then variable) (United             
Kingdom) (S)    6.860  09-29-49  A+  1,655  1,770,928 
Chuo Mitsui Trust & Banking Co., Ltd.,             
Perpetual Sub Note (5.506% to             
04-15-15 then variable)             
(Japan) (S)    5.506  12-01-49  Baa1  940  901,261 
Royal Bank of Scotland Group Plc,             
Perpetual Bond (7.648% to             
09-30-31 then variable) (United             
Kingdom)    7.648  08-29-49  A  650  758,069 
 
Diversified Chemicals 0.81%            2,085,900 
NOVA Chemicals Corp.,             
Med Term Note (Canada)    7.400  04-01-09  BB+  2,045  2,085,900 

Page 2

John Hancock

Income Securities Trust

Securities owned by the Fund on September 30, 2006 (unaudited)

Diversified Commercial & Professional Services  0.31%          783,875 
Hutchison Whampoa International Ltd.,             
Gtd Sr Note (Cayman Islands) (S)    6.500  02-13-13  A-  750  783,875 
 
Diversified Financial Services 0.36%            917,600 
St. George Funding Co.,             
Perpetual Bond (8.485% to             
06-30-17 then variable)             
(Australia) (S)    8.485  12-31-49  Baa1  870  917,600 
 
Diversified Metals & Mining 0.19%            496,612 
Vedanta Resources Plc,             
Sr Note (United Kingdom) (S)    6.625  02-22-10  BB+  510  496,612 
 
Electric Utilities 4.70%            12,054,180 
AES Eastern Energy LP,             
Pass Thru Ctf Ser 1999-A    9.000  01-02-17  BB+  1,049  1,153,821 
Beaver Valley Funding Corp.,             
Sec Lease Obligation Bond    9.000  06-01-17  BBB-  513  579,916 
BVPS II Funding Corp.,             
Collateralized Lease Bond    8.890  06-01-17  BB+  700  805,735 
Empresa Electrica Guacolda SA,             
Sr Sec Note (S)    8.625  04-30-13  BBB-  790  864,762 
FPL Energy National Wind,             
Sr Sec Note (S)    5.608  03-10-24  BBB-  370  362,462 
FPL Group Capital, Inc.,             
Jr Sec Sub Note    6.350  10-01-66  BBB+  535  541,582 
HQI Transelect Chile SA,             
Sr Note (Chile)    7.875  04-15-11  A-  1,230  1,307,823 
Indiantown Cogeneration LP,             
1st Mtg Note Ser A-9    9.260  12-15-10  BB+  414  430,881 
IPALCO Enterprises, Inc.,             
Sr Sec Note    8.625  11-14-11  BB-  325  348,562 
Monterrey Power SA de CV,             
Sr Sec Bond (Mexico) (S)    9.625  11-15-09  BBB  514  565,754 
Nevada Power Co.,             
Mtg Backed Note (S)    6.500  05-15-18  BB  365  379,365 
Pepco Holdings, Inc.,             
Note    6.450  08-15-12  BBB  565  584,713 
PNPP II Funding Corp.,             
Deb    9.120  05-30-16  BB+  488  559,038 
System Energy Resources, Inc.,             
Sec Bond (S)    5.129  01-15-14  BBB  810  792,237 
TransAlta Corp.,             
Note (Canada)    5.750  12-15-13  BBB-  1,000  997,981 
TXU Corp.             
Sec Bond    7.460  01-01-15  BBB  593  612,258 
Waterford 3 Funding Corp.,             
Sec Lease Obligation Bond    8.090  01-02-17  BBB-  1,132  1,167,290 

Page 3

John Hancock
Income Securities Trust
Securities owned by the Fund on
September 30, 2006 (unaudited)

Electronic Equipment Manufacturers 0.32%          812,715 
Thomas & Betts Corp.,             
Sr Note    7.250  06-01-13  BBB-  775  812,715 
 
Food Distributors 0.22%          571,458 
Tyson Foods, Inc.,             
Sr Note (P)    6.600  04-01-16  BBB  555  571,458 
 
Gas Utilities 0.56%            1,448,530 
Energy Transfer Partners,           
Gtd Sr Note (G)(L)    5.950  02-01-15  BBB-  1,210  1,207,526 
KN Capital Trust I,             
Gtd Cap Security Ser B  8.560  04-15-27  BB+  240  241,004 
 
Health Care Equipment 0.27%          690,813 
Boston Scientific Corp.,             
Sr Note    6.400  06-15-16  BBB+  685  690,813 
 
Health Care Facilities 0.34%          883,495 
Manor Care, Inc.,             
Gtd Note    6.250  05-01-13  BBB  875  883,495 
 
Health Care Services 0.72%          1,841,672 
Alliance Imaging, Inc.,             
Sr Sub Note    7.250  12-15-12  B-  440  411,400 
Health Management Plc,           
Sr Sub Note    6.125  04-15-16  BBB+  860  832,595 
WellPoint, Inc.,             
Bond    5.250  01-15-16  BBB+  610  597,677 
 
Hotels, Resorts & Cruise Lines 0.60%          1,530,214 
Hyatt Equities LLC,             
Note (S)    6.875  06-15-07  BBB  1,060  1,067,014 
Travelport, Inc.             
Sr Note (S)    9.875  09-01-14  B-  480  463,200 
 
Industrial Machinery 0.86%          2,215,662 
Kennametal, Inc.,             
Sr Note    7.200  06-15-12  BBB  1,405  1,489,632 
Trinity Industries, Inc.,             
Pass Thru Ctf (S)    7.755  02-15-09  Ba1  719  726,030 
 
Integrated Oil & Gas 0.77%          1,982,046 
Pemex Project Funding Master Trust,           
Gtd Note    9.125  10-13-10  BBB  615  688,492 
Petro-Canada,             
Deb (Canada)    9.250  10-15-21  BBB  1,000  1,293,554 

Page 4

John Hancock
Income Securities Trust
Securities owned by the Fund on
September 30, 2006 (unaudited)

Integrated Telecommunication Services 1.99%          5,097,798 
AT&T Corp.,           
Gtd Sr Note  8.000  11-15-31  A  510  623,350 
BellSouth Corp.,           
Deb  6.300  12-15-15  A  1,040  1,055,329 
Embarq Corp.,           
Sr Note  7.082  06-01-16  BBB-  620  632,461 
Qwest Capital Funding, Inc.,           
Gtd Note  7.000  08-03-09  B  1,000  1,005,000 
Sprint Capital Corp.,           
Gtd Sr Note  6.900  05-01-19  BBB+  1,000  1,040,658 
Telefonos de Mexico SA de CV,           
Note (Mexico)  5.500  01-27-15  BBB  765  741,000 
 
Investment Banking & Brokerage 0.31%          794,550 
Mizuho Financial Group Cayman Ltd.,           
Gtd Sub Bond (Cayman Islands)  8.375  12-29-49  A2  750  794,550 
 
IT Consulting & Other Services 0.16%          402,370 
NCR Corp.,           
Note  7.125  06-15-09  BBB-  390  402,370 
 
Leisure Facilities 0.15%          389,513 
AMC Entertainment, Inc.,           
Sr Sub Note (L)  9.500  02-01-11  CCC+  390  389,513 
 
Life & Health Insurance 0.57%          1,452,976 
AmerUs Group Co.,           
Sr Note  6.583  05-16-11  Baa3  460  478,138 
Phoenix Cos., Inc. (The),           
Bond  6.675  02-16-08  BBB  510  513,086 
Provident Financing Trust I,           
Gtd Cap Security (L)  7.405  03-15-38  B+  485  461,752 
 
Managed Health Care 0.20%          510,000 
HealthSouth Corp.,           
Sr Note (P)(S)  11.418  06-15-14  CCC+  500  510,000 
 
Marine 0.27%          682,500 
CMA CGM SA,           
Sr Note (France) (S)  7.250  02-01-13  BB+  700  682,500 
 
Metal & Glass Containers 0.20%          512,500 
Owens-Brockway Glass Container, Inc.,           
Gtd Sr Note  8.250  05-15-13  B  500  512,500 
 
Multi-Line Insurance 0.51%          1,321,864 
Assurant, Inc.,           
Sr Note  6.750  02-15-34  BBB+  510  538,324 

Page 5

John Hancock
Income Securities Trust
Securities owned by the Fund on
September 30, 2006 (unaudited)

Horace Mann Educators Corp.,           
Sr Note  6.850  04-15-16  BBB  395  408,095 
Liberty Mutual Group,           
Bond (S)  7.500  08-15-36  BBB  350  375,445 
 
Multi-Media 0.44%          1,128,049 
News America Holdings,           
Gtd Sr Deb  7.750  01-20-24  BBB  1,020  1,128,049 
 
Multi-Utilities 0.91%          2,345,849 
CalEnergy Co., Inc.,           
Sr Bond  8.480  09-15-28  BBB+  550  699,581 
Salton Sea Funding Corp.,           
Sec Note Ser C  7.840  05-30-10  BB+  1,606  1,646,268 
 
Office Services & Supplies 0.22%          568,400 
Xerox Corp.,           
Sr Note  6.750  02-01-17  BB+  560  568,400 
 
Oil & Gas Drilling 0.13%          333,384 
Delek & Avner-Yam Tethys Ltd.,           
Sr Sec Note (Israel) (S)  5.326  08-01-13  BBB-  341  333,384 
 
Oil & Gas Exploration & Production 0.11%          296,214 
Anadarko Petroleum Corp.,           
Sr Note  6.450  09-15-36  BBB-  290  296,214 
 
Oil & Gas Refining & Marketing 0.50%          1,289,062 
Enterprise Products Operations LP,           
Gtd Sr Note Ser B  5.600  10-15-14  BB+  1,000  978,509 
Premcor Refining Group, Inc.,           
Sr Note  9.500  02-01-13  BBB-  285  310,553 
 
Oil & Gas Storage & Transportation 0.18%          463,450 
MarkWest Energy Partners LP/MarkWest Energy           
Finance Corp.,           
Sr Note (S)  8.500  07-15-16  B  460  463,450 
 
Paper Packaging 0.78%          2,003,600 
MDP Acquisitions Plc,           
Sr Note (Ireland)  9.625  10-01-12  B-  750  791,250 
Stone Container Corp.,           
Sr Note  9.750  02-01-11  CCC+  245  252,350 
Sr Note  8.375  07-01-12  CCC+  1,000  960,000 
 
Paper Products 0.82%          2,105,874 
Abitibi Consolidated, Inc.,           
Gtd Sr Note (Canada)  6.000  06-20-13  B+  349  283,563 
Graphic Packaging International Corp.,           
Sr Note (L)  8.500  08-15-11  B-  445  455,012 

Page 6

John Hancock
Income Securities Trust
Securities owned by the Fund on
September 30, 2006 (unaudited)

Plum Creek Timber Co., Inc.,             
Gtd Note    5.875  11-15-15  BBB-  365  361,049 
Verso Paper Holdings LLC,             
Sr Sec Note (S)    9.125  08-01-14  B+  1,000  1,006,250 
 
Pharmaceuticals 0.66%            1,682,342 
Medco Health Solutions, Inc.,             
Sr Note    7.250  08-15-13  BBB  1,550  1,682,342 
 
Property & Casualty Insurance 0.53%            1,349,906 
Markel Corp.,             
Sr Note    7.350  08-15-34  BBB-  535  553,330 
Ohio Casualty Corp.,             
Note    7.300  06-15-14  BB  750  796,576 
 
Real Estate Management & Development 0.94%          2,425,528 
Healthcare Realty Trust, Inc.,             
Sr Note    8.125  05-01-11  BBB-  175  190,283 
Health Care REIT, Inc.,             
Sr Note    6.200  06-01-16  BBB-  360  362,467 
HRPT Properties Trust,             
Sr Note    5.750  11-01-15  BBB  780  774,630 
Post Apartment Homes,             
Sr Note    5.125  10-12-11  BBB  870  847,523 
Ventas Realty LP/Capital Corp.,             
Sr Note    6.625  10-15-14  BB  250  250,625 
 
Regional Banks 1.50%            3,839,375 
Colonial Capital II,             
Gtd Cap Sec Ser A    8.920  01-15-27  BB  1,085  1,140,979 
Crestar Capital Trust I,             
Gtd Cap Security    8.160  12-15-26  A-  910  950,437 
First Chicago NDB Institutional Capital,             
Gtd Cap Bond Ser A (S)    7.950  12-01-26  A1  500  520,501 
NB Capital Trust IV,             
Gtd Cap Security    8.250  04-15-27  A  1,170  1,227,458 
 
Soft Drinks 0.40%            1,035,000 
Panamerican Beverages, Inc.,             
Sr Note (Panama)    7.250  07-01-09  BBB  1,000  1,035,000 
 
Specialized Finance 1.60%            4,097,063 
Astoria Depositor Corp.,             
Pass Thru Ctf Ser B (G)(S)    8.144  05-01-21  BB  750  822,855 
Bosphorous Financial Services,             
Sec Floating Rate Note (P)(S)    7.205  02-15-12  Baa3  500  496,416 
Drummond Co., Inc.,             
Sr Note (L)(S)    7.375  02-15-16  BB-  500  470,000 
ESI Tractebel Acquistion Corp.,             
Gtd Sec Bond Ser B    7.990  12-30-11  BB  956  986,046 

Page 7

John Hancock
Income Securities Trust
Securities owned by the Fund on
September 30, 2006 (unaudited)

Graftech Finance, Inc.,           
Gtd Sr Note  10.250  02-15-12  B-  500  525,000 
JP Morgan Chase Capital,           
Jr Sub Note Ser T  6.550  09-29-36  A-  790  796,746 
 
Steel 0.24%          608,850 
Metallurg Holdings, Inc.,           
Sr Sec Note (G)(S)  10.500  10-01-10  B-  615  608,850 
 
Thrifts & Mortgage Finance 23.13%          59,360,917 
Banc of America Commercial Mortgage, Inc.,           
Mtg Pass Thru Ctf Ser 2005-6           
Class A4 (P)  5.354  09-10-47  AAA  940  934,270 
Mtg Pass Thru Ctf Ser 2006-4           
Class A3A  5.600  07-10-46  AAA  1,250  1,270,264 
Banc of America Funding Corp.,           
Mtg Pass Thru Ctf Ser 2006-B           
Class 6A1 (P)  5.888  03-20-36  AAA  1,125  1,131,966 
Mtg Pass Thru Ctf Ser 2006-D           
Class 6B2 (P)  5.978  05-20-36  AA  1,829  1,824,968 
Bear Stearns Adjustable Rate Mortgage Trust,           
Mtg Pass Thru Ctf Ser 2005-1           
Class B2 (P)  4.883  03-25-35  AA+  853  836,825 
Bear Stearns Alt-A Trust,           
Mtg Pass Thru Ctf Ser 2005-3           
Class B2 (P)  5.332  04-25-35  AA+  598  592,299 
Mtg Pass Thru Ctf Ser 2006-1           
Class 23A1 (P)  5.640  02-25-36  AAA  1,053  1,053,253 
Mtg Pass Thru Ctf Ser 2006-4           
Class 3B1  6.342  07-25-36  AA  2,529  2,574,772 
Bear Stearns Commercial Mortgage Securities,           
Inc.,           
Mtg Pass Thru Ctf Ser 2005-T20           
Class A4A (P)  5.303  10-12-42  Aaa  455  451,559 
Chaseflex Trust,           
Mtg Pass Thru Ctf Ser 2005-2           
Class 4A1  5.000  05-25-20  AAA  1,110  1,082,822 
Citigroup Mortgage Loan Trust, Inc.,           
Mtg Pass Thru Ctf Ser 2005-10           
Class 1A5A (P)  5.887  12-25-35  AAA  957  961,486 
Mtg Pass Thru Ctf Ser 2005-5           
Class 2A3  5.000  08-25-35  AAA  670  655,092 
Citigroup/Deutsche Bank Commercial Mortgage           
Securities,           
Mtg Pass Thru Ctf Ser 2005-CD1           
Class A4 (P)  5.400  07-15-44  AAA  620  617,905 
Mtg Pass Thru Ctf Ser 2005-CD1           
Class C (P)  5.400  07-15-44  AA  295  291,865 
ContiMortgage Home Equity Loan Trust,           
Pass Thru Ctf Ser 1995-2 Class A-5  8.100  08-15-25  AAA  121  124,735 

Page 8

John Hancock
Income Securities Trust
Securities owned by the Fund on
September 30, 2006 (unaudited)

Countrywide Alternative Loan Trust,           
Mtg Pass Thru Ctf Ser 2004-24CB           
Class 1A1  6.000  11-25-34  AAA  769  767,021 
Mtg Pass Thru Ctf Ser 2005-6           
Class 2A1  5.500  04-25-35  Aaa  634  615,730 
Mtg Pass Thru Ctf Ser 2005-J1           
Class 3A1  6.500  08-25-32  AAA  488  492,959 
Mtg Pass Thru Ctf Ser 2006-11CB           
Class 3A1  6.500  05-25-36  Aaa  4,428  4,472,012 
Countrywide Home Loans Servicing LP,           
Mtg Pass Thru Ctf Ser 2005-21           
Class A1  5.500  10-25-35  Aaa  4,140  4,090,706 
DB Master Finance LLC,           
Mtg Pass Thru Ser 2006-1 Class M1           
(S)  8.285  06-20-31  BB  340  347,443 
First Horizon Alternative Mortgage Securities,           
Mtg Pass Thru Ctf Ser 2004-AA5           
Class B1 (P)  5.233  12-25-34  AA  497  491,823 
Mtg Pass Thru Ctf Ser 2006-AA2           
Class B1 (G)(P)  6.237  05-25-36  AA  1,550  1,570,157 
Global Signal Trust,           
Sub Bond Ser 2004-2A Class D (S)  5.093  12-15-14  Baa2  495  490,426 
Sub Bond Ser 2006-1 Class E (S)  6.495  02-15-36  Baa3  460  459,377 
GMAC Commercial Mortgage Securities, Inc.,           
Mtg Pass Thru Ctf Ser 2002-C1           
Class A1  5.785  11-15-39  AAA  1,667  1,684,311 
Greenwich Capital Commercial Funding Corp.,           
Mtg Pass Thru Ctf Ser 2005-GG5           
Class A2  5.117  04-10-37  AAA  1,260  1,257,891 
GSR Mortgage Loan Trust,           
Mtg Pass Thru Ctf Ser 2004-9           
Class B1 (G)(P)  4.575  08-25-34  AA  1,234  1,213,143 
Mtg Pass Thru Ctf Ser 2006-4F           
Class 6A1  6.500  05-25-36  AAA  4,757  4,826,220 
Indymac Index Mortgage Loan Trust,           
Mtg Pass Thru Ctf Ser 2004-AR13           
Class B1  5.296  01-25-35  AA  483  480,487 
Mtg Pass Thru Ctf Ser 2005-AR5           
Class B1 (P)  5.394  05-25-35  AA  523  516,619 
Mtg Pass Thru Ctf Ser 2006-AR19           
Class 1B1 (P)  6.452  08-25-36  AA  454  463,322 
JP Morgan Alternative Loan Trust,           
Mtg Pass Thru Ctf Ser 2005-S1           
Class 1A4  6.000  12-25-35  AAA  4,655  4,660,842 
JP Morgan Chase Commercial Mortgage Security           
Corp.,           
Mtg Pass Thru Ctf Ser 2005-LDP4           
Class B  5.129  10-15-42  Aa2  2,035  1,989,937 
JP Morgan Mortgage Trust,           
Mtg Pass Thru Ctf Ser 2005-S3           
Class 2A2  5.500  01-25-21  AAA  1,056  1,048,309 

Page 9

John Hancock
Income Securities Trust
Securities owned by the Fund on
September 30, 2006 (unaudited)

Merrill Lynch Mortgage Trust,           
Mtg Pass Thru Ctf Ser 2005-CKI1           
Class A6 (P)  5.417  11-12-37  AAA  855  852,750 
Morgan Stanley Capital I,           
Mtg Pass Thru Ctf Ser 2005-HQ7           
Class A4 (P)  5.375  11-14-42  AAA  840  835,859 
Mtg Pass Thru Ctf Ser 2005-IQ10           
Class A4A  5.230  09-15-42  AAA  1,225  1,214,064 
Nomura Asset Acceptance Corp.,           
Mtg Pass Thru Ctf Ser 2006-AF1           
Class CB1  6.540  06-25-36  AA  1,001  1,026,571 
Provident Funding Mortgage Loan Trust,           
Mtg Pass Thru Ctf Ser 2005-1           
Class B1 (P)  4.362  05-25-35  AA  421  408,551 
Residential Accredit Loans, Inc.,           
Mtg Pass Thru Ctf Ser 2005-QA12           
Class NB5 (P)  5.992  12-25-35  AAA  4,127  4,187,481 
SBA CMBS Trust,           
Sub Bond Ser 2005-1A Class C (S)  5.731  11-15-35  A2  200  201,411 
Sub Bond Ser 2005-1A Class D (S)  6.219  11-15-35  Baa2  225  227,966 
Sub Bond Ser 2005-1A Class E (S)  6.706  11-15-35  Baa3  200  204,425 
Sovereign Capital Trust I,           
Gtd Cap Security  9.000  04-01-27  BB  1,000  1,047,844 
Washington Mutual Alternative Loan Trust,           
Mtg Pass Thru Ctf Ser 2005-6           
Class 1CB  6.500  08-25-35  AAA  702  708,745 
Washington Mutual, Inc.,           
Mtg Pass Thru Ctf Ser 2005-AR4           
Class B1 (P)  4.674  04-25-35  AA  1,513  1,433,424 
Wells Fargo Mortgage Backed Securites Trust,           
Mtg Pass Thru Ctf Ser 2004-7           
Class 2A2  5.000  07-25-19  AAA  684  669,010 
 
Tobacco 0.40%          1,029,028 
Reynolds American, Inc.,           
Sr Sec Note (S)  7.250  06-01-13  BB  1,000  1,029,028 
 
Utilities Other 0.20%          517,526 
Magellan Midstream Partners LP,           
Note  6.450  06-01-14  BBB  500  517,526 
 
Wireless Telecommunication Services 1.75%          4,496,439 
America Movil SA de CV,           
Sr Note (Mexico)  5.750  01-15-15  BBB  1,275  1,255,689 
Citizens Communications Co.,           
Sr Note  6.250  01-15-13  BB+  460  447,350 
Crown Castle Towers LLC,           
Sub Bond Ser 2005-1A Class D  5.612  06-15-35  Baa2  1,340  1,336,405 
Mobile Telesystems Finance SA,           
Gtd Sr Note (Luxembourg) (S)  9.750  01-30-08  BB-  400  415,500 
Nextel Communications, Inc.,           
Sr Note Ser D  7.375  08-01-15  BBB+  500  515,870 

Page 10

John Hancock
Income Securities Trust
Securities owned by the Fund on

September 30, 2006 (unaudited)

Nordic Telephone Co. Holdings,           
Sr Bond (Denmark) (S)  8.875  05-01-16  B  500  525,625 
        Credit     
Issuer, description        rating (A)  Shares  Value 
Preferred stocks 3.04%          $7,812,554 
(Cost $8,018,146)             
 
Agricultural Products 0.39%          1,014,454 
Ocean Spray Cranberries, Inc., 6.25%, Ser A (S)      BB+  12,500  1,014,454 

Broadcasting & Cable TV 0.39%  		        1,004,000 
CBS Corp., 7.250%        BBB  40,000  1,004,000 

Diversified Banks 0.54%  		        1,397,000 
Bank One Capital Trust VI, 7.20%      A-  55,000  1,397,000 

Integrated Telecommunication Services 0.39%  		        1,000,400 
Telephone & Data Systems, Inc., 7.60%, Ser A      A-  40,000  1,000,400 

Multi-Utilities 0.40%  		          1,017,200 
Dominion CNG Capital Trust I, 7.80%      BB+  40,000  1,017,200 

Real Estate Management & Development 0.93%  		        2,379,500 
Apartment Investment & Management Co., 8.00%,           
Ser T        B+  55,000  1,395,900 
Public Storage, Inc., 6.50%, Depositary Shares,           
Ser W        BBB+  40,000  983,600 

  Interest  Maturity  Credit  Par value   
Issuer, description  rate (%)  date  rating (A)  ($000)  Value 
U.S. government and agencies securities  37.99%        $97,497,555 
(Cost $96,952,516)           
Government U.S. 4.36%          11,195,509 
United States Treasury,           
Bond (L)  6.250  08-15-23  AAA  430  499,237 
Bond (L)  4.500  02-15-36  AAA  1,935  1,854,123 
Note (L)  5.125  05-15-16  AAA  605  627,593 
Note (L)  4.875  08-15-16  AAA  1,444  1,471,300 
Note (L)  4.500  02-15-16  AAA  4,460  4,415,226 
Note (L)  4.250  11-15-13  AAA  2,380  2,328,030 
 
Government U.S. Agency 33.63%          86,302,046 
Federal Home Loan Mortgage Corp.,           
20 Yr Pass Thru Ctf  11.250  01-01-16  AAA  20  21,243 
30 Yr Pass Thru Ctf  6.000  08-01-34  AAA  2,240  2,251,630 
30 Yr Pass Thru Ctf  5.500  04-01-33  AAA  1,778  1,758,926 
30 Yr Adj Rate Pass Thru Ctf (P)  5.161  11-01-35  AAA  2,182  2,145,445 

Page 11

John Hancock
Income Securities Trust
Securities owned by the Fund on
September 30, 2006 (unaudited)

CMO REMIC 2978-CL  5.500  01-15-31  AAA  2,695  2,673,879 
CMO REMIC 3153-NE  5.500  05-15-34  AAA  1,335  1,305,013 
CMO REMIC 3154-PM  5.500  05-15-34  AAA  1,145  1,118,509 
CMO REMIC 3184-PD  5.500  07-15-34  AAA  3,885  3,842,345 
Federal National Mortgage Assn.,           
15 Yr Pass Thru Ctf  7.000  09-01-10  AAA  24  24,095 
15 Yr Pass Thru Ctf  7.000  09-01-12  AAA  5  4,769 
15 Yr Pass Thru Ctf  7.000  04-01-17  AAA  43  44,537 
15 Yr Pass Thru Ctf  6.000  05-01-21  AAA  979  993,857 
30 Yr Pass Thru Ctf  6.500  07-01-36  AAA  4,996  5,087,873 
30 Yr Pass Thru Ctf  6.000  05-01-35  AAA  3,847  3,865,150 
30 Yr Pass Thru Ctf  6.000  08-01-35  AAA  3,569  3,586,614 
30 Yr Pass Thru Ctf  6.000  04-01-36  AAA  1,994  2,002,987 
30 Yr Pass Thru Ctf  6.000  06-01-36  AAA  3,908  3,926,073 
30 Yr Pass Thru Ctf  6.000  08-01-36  AAA  14,379  14,445,045 
30 Yr Pass Thru Ctf (M)  6.000  09-01-36  AAA  17,413  17,493,320 
30 Yr Pass Thru Ctf  5.500  04-01-35  AAA  2,142  2,113,869 
30 Yr Pass Thru Ctf  5.500  11-01-35  AAA  2,130  2,099,659 
30 Yr Pass Thru Ctf  5.500  01-01-36  AAA  2,589  2,552,053 
30 Yr Pass Thru Ctf  5.500  02-01-36  AAA  4,940  4,869,617 
30 Yr Adj Rate Pass Thru Ctf (P)  5.321  11-01-35  AAA  3,736  3,683,673 
CMO REMIC 2006-57-PD  5.500  01-25-35  AAA  1,505  1,475,865 
CMO REMIC 2006-67-PD  5.500  12-25-34  AAA  1,230  1,206,008 
Note  6.000  05-30-25  AAA  1,720  1,686,183 
Government National Mortgage Assn.,           
30 Yr Pass Thru Ctf  10.000  11-15-20  AAA  4  4,974 
30 Yr Pass Thru Ctf  9.500  01-15-21  AAA  4  4,770 
30 Yr Pass Thru Ctf  9.500  02-15-25  AAA  13  14,065 

  Interest            Par value   
Issuer, description, maturity date    rate (%)  ($000)  Value 
Short-term investments 0.75%      $1,922,000 
(Cost $1,921,535)         
Government U.S. Agency 0.74%        1,900,000 
Federal Home Loan Bank,         
Disc Note 10-02-06    AAA  1,900  1,900,000 
 
Joint Repurchase Agreement 0.01%      22,000 
Investment in a joint repurchase agreement       
transaction with Cantor Fitzgerald, LP — Dated       
9-29-06 due 10-02-06 (secured by U.S. Treasury       
Bond 8.125% due 8-15-19, U.S. Treasury       
Inflation Indexed Bond 2.000% due 1-15-26 and       
U.S. Treasury Inflation Indexed Notes 1.875%       
due 7-15-13, 2.000% due 1-15-16 and 3.000% due       
7-15-12)    5.100   22  22,000 
 
Total investments (Cost $256,835,378) 100.00%      $256,640,324 

Page 12

John Hancock
Income Securities Trust
Footnotes to Schedule of Investments
September 30, 2006 (unaudited)

(A) Credit ratings are unaudited and are rated by Moody's Investors Service where Standard & Poor's ratings are not available unless indicated otherwise.

(G) Security rated internally by John Hancock Advisers, LLC.

(L) All or a portion of this security is on loan as of September 30, 2006.

(M) These securities having an aggregate value of $17,493,320, or 6.82% of the Fund's total investments, have been purchased as a forward commitments--that is, the Fund has agreed on trade date to take delivery of and to make payment for these securities on a delayed basis subsequent to the date of this schedule. The purchase price and interest rate of these securities are fixed at trade date, although the Fund does not earn any interest on these until settlement date. The fund has segregated assets with a current value at least equal to the amount of the forward commitments.

Accordingly, the market value of $17,830,540 of Federal National Mortgage Assn., 6.500%, 07-01-36, Federal National Mortgage Assn., 6.000%, 08-01-36, GSR Mortgage Loan Trust, 6.500%, 05-25-36, and JP Morgan Alternative Loan Trust, 6.000%, 12-25-35 has been segregated to cover the forward commitments.

(P) Represents rate in effect on September 30, 2006.

(S) These securities are exempt from registration under Rule 144A of the Securities Act of 1933. Such securities may be resold, normally to qualified institutional buyers, in transactions exempt from registration. Rule 144A securities amounted to $26,024,143 or 10.14% of the Fund's total investments as of September 30, 2006.

Parenthetical disclosure of a foreign country in the security description represents country of a foreign issuer; however, security is U.S. dollar-denominated.

The percentage shown for each investment category is the total value of that category as a percentage of the total investments of the Fund.

The cost of investments owned on September 30, 2006, including short-term investments, was $256,835,378. Gross unrealized appreciation and depreciation of investments aggregated $2,651,284 and $2,846,338, respectively, resulting in net unrealized depreciation of $195,054.

Footnotes to Schedule of Investments - Page 1


ITEM 2. CONTROLS AND PROCEDURES.

(a) Based upon their evaluation of the registrant's disclosure controls and procedures as conducted within 90 days of the filing date of this Form N-Q, the registrant's principal executive officer and principal accounting officer have concluded that those disclosure controls and procedures provide reasonable assurance that the material information required to be disclosed by the registrant on this report is recorded, processed, summarized and reported within the time periods specified in the Securities and Exchange Commission's rules and forms.

(b) There were no changes in the registrant's internal control over financial reporting that occurred during the registrant's last fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting.

ITEM 3. EXHIBITS.

Separate certifications for the registrant's principal executive officer and principal accounting officer, as required by Rule 30a-2(a) under the Investment Company Act of 1940, are attached.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

John Hancock Income Securities Trust

By: /s/ Keith F. Hartstein
-------------------------------------
Keith F. Hartstein
President and Chief Executive Officer

Date: November 29, 2006

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

By: /s/ Keith F. Hartstein
-------------------------------------
Keith F. Hartstein
President and Chief Executive Officer

Date: November 29, 2006

By: /s/ John G. Vrysen
-------------------------------------
John G. Vrysen
Executive Vice President and Chief Financial Officer

Date: November 29, 2006