N-Q 1 form.htm QUARTERLY SCHEDULE form.htm - Generated by SEC Publisher for SEC Filing
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION 
Washington, D.C. 20549

FORM N-Q

QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT 
INVESTMENT COMPANY

Investment Company Act file number                       811-5719

Dreyfus Stock Index Fund, Inc.
(Exact name of Registrant as specified in charter) 

c/o The Dreyfus Corporation
200 Park Avenue
New York, New York 10166
(Address of principal executive offices)  (Zip code) 

Michael A. Rosenberg, Esq.
200 Park Avenue
New York, New York 10166
(Name and address of agent for service) 

Registrant's telephone number, including area code:  (212) 922-6000 
Date of fiscal year end:  12/31   
Date of reporting period:  03/31/09   

FORM N-Q

Item 1. Schedule of Investments.

STATEMENT OF INVESTMENTS     
Dreyfus Stock Index Fund     
March 31, 2009 (Unaudited)     
 
 
Common Stocks--98.6%  Shares  Value ($) 
Consumer Discretionary--8.6%     
Abercrombie & Fitch, Cl. A   16,733 a  398,245 
Amazon.com   61,311 a,b  4,502,680 
Apollo Group, Cl. A   20,390 a,b  1,597,149 
AutoNation   20,684 a,b  287,094 
AutoZone     7,387 a,b  1,201,274 
Bed Bath & Beyond   49,957 a,b  1,236,436 
Best Buy   64,759 a  2,458,252 
Big Lots   15,707 a,b  326,391 
Black & Decker   11,462  361,741 
Carnival   83,833 a  1,810,793 
CBS, Cl. B  130,439  500,886 
Centex   23,655 a  177,412 
Coach   63,061 b  1,053,119 
Comcast, Cl. A  554,436  7,562,507 
D.R. Horton   52,832 a  512,470 
Darden Restaurants   26,936  922,827 
DIRECTV Group  103,839 a,b  2,366,491 
Eastman Kodak   55,415 a  210,577 
Expedia   40,148 b  364,544 
Family Dollar Stores   26,781 a  893,682 
Ford Motor  458,773 a,b  1,206,573 
Fortune Brands   28,733  705,395 
GameStop, Cl. A   31,366 b  878,875 
Gannett   43,796 a  96,351 
Gap   90,070  1,170,009 
General Motors  116,779 a  226,551 
Genuine Parts   31,037 a  926,765 
Goodyear Tire & Rubber   46,245 a,b  289,494 
H & R Block   65,093  1,184,042 
Harley-Davidson   45,136 a  604,371 
Harman International Industries   11,270  152,483 
Hasbro   24,057  603,109 
Home Depot  325,780  7,675,377 
International Game Technology   59,440  548,037 
Interpublic Group of Cos.   91,362 a,b  376,411 
J.C. Penney   42,587 a  854,721 
Johnson Controls  113,906  1,366,872 
KB Home   14,440 a  190,319 

Kohl's   58,465 a,b  2,474,239 
Leggett & Platt   30,852 a  400,767 
Lennar, Cl. A   27,124 a  203,701 
Limited Brands   54,855  477,238 
Lowe's Cos.  281,106  5,130,184 
Macy's   80,645 a  717,740 
Marriott International, Cl. A   56,647 a  926,745 
Mattel   69,180  797,645 
McDonald's  214,557  11,708,375 
McGraw-Hill Cos.   60,945  1,393,812 
Meredith  6,977 a  116,097 
New York Times, Cl. A   22,293 a  100,764 
Newell Rubbermaid   53,151  339,103 
News, Cl. A  440,393  2,915,402 
NIKE, Cl. B   75,222  3,527,160 
Nordstrom   30,637 a  513,170 
O'Reilly Automotive   26,019 b  910,925 
Office Depot   52,785 b  69,148 
Omnicom Group   59,929  1,402,339 
Polo Ralph Lauren   10,931 a  461,835 
Pulte Homes   41,027 a  448,425 
RadioShack   25,201  215,973 
Scripps Networks Interactive, Cl. A   17,269  388,725
Sears Holdings   10,922 a,b  499,245 
Sherwin-Williams   18,930  983,792 
Snap-On   10,975  275,473 
Stanley Works   15,073  438,926 
Staples  136,361  2,469,498 
Starbucks  140,130 b  1,556,844 
Starwood Hotels & Resorts Worldwide   35,874  455,600 
Target  144,739  4,977,574 
Tiffany & Co.   23,811 a  513,365 
Time Warner  229,067  4,420,987 
Time Warner Cable   67,511  1,674,274 
TJX Cos.   80,458  2,062,943 
VF   16,679  952,538 
Viacom, Cl. B  119,107 b  2,070,080 
Walt Disney  356,384  6,471,933 
Washington Post, Cl. B  1,141  407,451 
Whirlpool   14,380 a  425,504 
Wyndham Worldwide   34,061  143,056 
Wynn Resorts   11,792 a,b  235,486 
Yum! Brands   89,986  2,472,815 

    116,947,221 
Consumer Staples--12.6%     
Altria Group  398,471  6,383,505 
Archer-Daniels-Midland  123,635  3,434,580 
Avon Products  81,610  1,569,360 
Brown-Forman, Cl. B  18,843  731,674 
Campbell Soup  40,614  1,111,199 
Clorox  26,486  1,363,499 
Coca-Cola  382,864  16,826,873 
Coca-Cola Enterprises  60,782  801,715 
Colgate-Palmolive  96,985 a  5,720,175 
ConAgra Foods  86,910  1,466,172 
Constellation Brands, Cl. A  37,168 b  442,299 
Costco Wholesale  83,384 a  3,862,347 
CVS Caremark  280,708  7,716,663 
Dean Foods  29,213 a,b  528,171 
Dr. Pepper Snapple Group  48,686 b  823,280 
Estee Lauder, Cl. A  22,046 a  543,434 
General Mills  64,078  3,196,211 
H.J. Heinz  59,945  1,981,782 
Hershey  31,834  1,106,231 
Hormel Foods  13,425  425,707 
J.M. Smucker  22,633  843,532 
Kellogg  48,044  1,759,852 
Kimberly-Clark  79,718  3,675,797 
Kraft Foods, Cl. A  282,865  6,305,061 
Kroger  125,625  2,665,762 
Lorillard  32,403  2,000,561 
McCormick & Co.  24,728  731,207 
Molson Coors Brewing, Cl. B  28,938  991,995 
Pepsi Bottling Group  26,203  580,134 
PepsiCo  300,168  15,452,649 
Philip Morris International  387,587  13,790,345 
Procter & Gamble  566,162  26,660,569 
Reynolds American  32,591  1,168,061 
Safeway  83,517  1,686,208 
Sara Lee  135,465  1,094,557 
SUPERVALU  40,788  582,453 
SYSCO  115,398  2,631,074 
Tyson Foods, Cl. A  57,504  539,963 
Wal-Mart Stores  431,251  22,468,177 
Walgreen  189,913  4,930,141 
Whole Foods Market  26,928 a  452,390 
    171,045,365 
Energy--12.8%     

Anadarko Petroleum  88,426  3,438,887 
Apache  64,170  4,112,655 
Baker Hughes  59,088  1,686,962 
BJ Services  56,403  561,210 
Cabot Oil & Gas  19,855 a  467,982 
Cameron International  41,699 a,b  914,459 
Chesapeake Energy  108,334 a  1,848,178 
Chevron  387,261  26,039,430 
ConocoPhillips  286,568  11,222,003 
Consol Energy  35,183  888,019 
Devon Energy  84,736  3,786,852 
Diamond Offshore Drilling  13,363 a  839,998 
El Paso  134,523 a  840,769 
ENSCO International  27,521  726,554 
EOG Resources  47,756  2,615,119 
Exxon Mobil  954,524  65,003,084 
Halliburton  171,845  2,658,442 
Hess  54,242  2,939,916 
Marathon Oil  135,353  3,558,430 
Massey Energy  16,243  164,379 
Murphy Oil  36,538  1,635,806 
Nabors Industries  53,738 b  536,843 
National Oilwell Varco  80,053 b  2,298,322 
Noble Energy  33,173  1,787,361 
Occidental Petroleum  155,924  8,677,171 
Peabody Energy  52,174  1,306,437 
Pioneer Natural Resources  22,587 a  372,008 
Range Resources  29,757  1,224,798 
Rowan  21,709  259,857 
Schlumberger  230,076  9,345,687 
Smith International  41,453  890,410 
Southwestern Energy  65,857 b  1,955,294 
Spectra Energy  123,998  1,753,332 
Sunoco  22,391 a  592,914 
Tesoro  26,437 a  356,106 
Valero Energy  100,431  1,797,715 
Williams Cos.  110,502  1,257,513 
XTO Energy  110,935  3,396,830 
    173,757,732 
Financial--10.6%     
Aflac  89,777  1,738,083 
Allstate  103,906  1,989,800 
American Express  222,422  3,031,612 
American International Group  515,755 a  515,755 
Ameriprise Financial  41,597  852,323 

AON       51,996  2,122,477 
Apartment Investment & Management, Cl. A       21,471 a  117,661 
Assurant       22,787  496,301 
AvalonBay Communities       15,259 a  718,089 
Bank of America  1,230,134 a  8,389,514 
Bank of New York Mellon   219,821  6,209,943 
BB & T   105,406 a  1,783,470 
Boston Properties       23,022 a  806,461 
Capital One Financial       75,274 a  921,354 
CB Richard Ellis Group, Cl. A       42,211 a,b  170,110 
Charles Schwab   178,950  2,773,725 
Chubb       68,900  2,915,848 
Cincinnati Financial       31,103  711,326 
CIT Group       54,375  154,969 
Citigroup  1,044,560 a  2,642,737 
CME Group       12,913 a  3,181,634 
Comerica       28,880  528,793 
Discover Financial Services       91,961  580,274 
E*TRADE FINANCIAL   102,957 a,b  131,785 
Equity Residential       51,948  953,246 
Federated Investors, Cl. B       16,826  374,547 
Fifth Third Bancorp   110,828 a  323,618 
First Horizon National       40,494 a  434,906 
Franklin Resources       29,226  1,574,405 
Genworth Financial, Cl. A       83,077  157,846 
Goldman Sachs Group       89,061  9,442,247 
Hartford Financial Services Group       62,569 a  491,167 
HCP       48,291 a  861,994 
Health Care REIT       19,893 a  608,527 
Host Hotels & Resorts       99,599 a  390,428 
Hudson City Bancorp       99,656  1,164,979 
Huntington Bancshares       70,252 a  116,618 
IntercontinentalExchange       13,942 b  1,038,261 
Invesco       74,158  1,027,830 
Janus Capital Group       30,645  203,789 
JPMorgan Chase & Co.   724,821  19,265,742 
KeyCorp       94,897  746,839 
Kimco Realty       43,504 a  331,500 
Legg Mason       27,221 a  432,814 
Leucadia National       33,953 a,b  505,560 
Lincoln National       49,225  329,315 
Loews       69,497  1,535,884 
M & T Bank       14,831 a  670,954 
Marsh & McLennan Cos.       98,398  1,992,559 

Marshall & Ilsley   49,803 a  280,391 
MBIA   37,498 a,b  171,741 
MetLife  157,749  3,591,945 
Moody's   37,870 a  867,980 
Morgan Stanley  207,206 a  4,718,081 
Nasdaq OMX Group   26,049 a,b  510,039 
Northern Trust   42,423  2,537,744 
NYSE Euronext   50,982  912,578 
People's United Financial   66,536  1,195,652 
Plum Creek Timber   32,802 a  953,554 
PNC Financial Services Group   82,205  2,407,784 
Principal Financial Group   49,709  406,620 
Progressive  129,545 b  1,741,085 
ProLogis   50,329 a  327,139 
Prudential Financial   81,971  1,559,088 
Public Storage   24,050 a  1,328,763 
Regions Financial  133,327 a  567,973 
Simon Property Group   44,190 a  1,530,742 
SLM   89,614 b  443,589 
State Street   82,783  2,548,061 
SunTrust Banks   67,805  796,031 
T. Rowe Price Group   49,663 a  1,433,274 
Torchmark   16,743 a  439,169 
Travelers Cos.  112,571  4,574,885 
U.S. Bancorp  337,565  4,931,825 
Unum Group   63,904  798,800 
Ventas   27,547 a  622,838 
Vornado Realty Trust   26,681 a  886,868 
Wells Fargo & Co.  817,353  11,639,107 
XL Capital, Cl. A   59,817 a  326,601 
Zions Bancorporation   21,998 a  216,240 
    143,725,806 
Health Care--15.1%     
Abbott Laboratories  298,560  14,241,312 
Aetna   88,871  2,162,231 
Allergan   58,978  2,816,789 
AmerisourceBergen   30,420  993,517 
Amgen  200,233 b  9,915,538 
Baxter International  119,176  6,104,195 
Becton, Dickinson & Co.   46,687  3,139,234 
Biogen Idec   57,310 a,b  3,004,190 
Boston Scientific  287,877 b  2,288,622 
Bristol-Myers Squibb  379,754  8,324,208 
C.R. Bard   19,075  1,520,659 
Cardinal Health   68,929  2,169,885 

Celgene       88,125 b  3,912,750 
Cephalon       13,072 a,b  890,203 
CIGNA       52,748  927,837 
Coventry Health Care       28,387 b  367,328 
Covidien       96,257  3,199,583 
DaVita       20,003 b  879,132 
Dentsply International       28,487 a  764,876 
Eli Lilly & Co.   194,998  6,514,883 
Express Scripts       47,266 b  2,182,271 
Forest Laboratories       58,508 b  1,284,836 
Genzyme       52,018 b  3,089,349 
Gilead Sciences   176,498 b  8,175,387 
Hospira       30,563 b  943,174 
Humana       32,443 b  846,113 
IMS Health       34,930  435,577 
Intuitive Surgical         7,463 a,b  711,672 
Johnson & Johnson   534,051  28,091,083 
King Pharmaceuticals       47,236 a,b  333,959 
Laboratory Corp. of America     
     Holdings       20,835 a,b  1,218,639 
Life Technologies       33,070 a,b  1,074,114 
McKesson       52,899  1,853,581 
Medco Health Solutions       95,700 b  3,956,238 
Medtronic   215,315  6,345,333 
Merck & Co.   407,013  10,887,598 
Millipore       10,536 a,b  604,872 
Mylan       58,392 a,b  783,037 
Patterson Cos.       17,514 b  330,314 
PerkinElmer       22,953  293,110 
Pfizer  1,297,577  17,672,999 
Quest Diagnostics       30,342  1,440,638 
Schering-Plough   311,871  7,344,562 
St. Jude Medical       65,553 b  2,381,540 
Stryker       47,094  1,603,080 
Tenet Healthcare       79,563 a,b  92,293 
Thermo Fisher Scientific       80,389 b  2,867,476 
UnitedHealth Group   233,620  4,889,667 
Varian Medical Systems       23,905 b  727,668 
Waters       18,980 a,b  701,311 
Watson Pharmaceuticals       20,049 a,b  623,724 
WellPoint       97,185 b  3,690,114 
Wyeth   255,798  11,009,546 
Zimmer Holdings       43,177 b  1,575,961 
    204,197,808 
Industrial--9.6%     

3M   133,420  6,633,642 
Avery Dennison       20,441  456,652 
Boeing   141,118  5,020,978 
Burlington Northern Santa Fe       54,199  3,260,070 
C.H. Robinson Worldwide       32,590 a  1,486,430 
Caterpillar   116,743 a  3,264,134 
Cintas       25,371  627,171 
Cooper Industries, Cl. A       33,421  864,267 
CSX       76,008  1,964,807 
Cummins       38,886  989,649 
Danaher       48,926 a  2,652,768 
Deere & Co.       81,956  2,693,894 
Dover       36,010  949,944 
Dun & Bradstreet       10,335  795,795 
Eaton       31,861  1,174,396 
Emerson Electric   147,078  4,203,489 
Equifax       24,646  602,595 
Expeditors International Washington       40,885  1,156,637 
Fastenal       24,782 a  796,865 
FedEx       59,650  2,653,828 
Flowserve       11,029  618,947 
Fluor       34,331  1,186,136 
General Dynamics       75,086  3,122,827 
General Electric  2,036,884  20,592,897 
Goodrich       24,011  909,777 
Honeywell International   141,763  3,949,517 
Illinois Tool Works       75,572  2,331,396 
Ingersoll-Rand, Cl. A       61,108  843,290 
Iron Mountain       34,563 a,b  766,262 
ITT       34,831  1,339,949 
Jacobs Engineering Group       23,462 b  907,041 
L-3 Communications Holdings       23,281  1,578,452 
Lockheed Martin       64,167  4,429,448 
Manitowoc       25,026  81,835 
Masco       69,028  481,815 
Monster Worldwide       23,810 a,b  194,051 
Norfolk Southern       71,329  2,407,354 
Northrop Grumman       62,997  2,749,189 
Paccar       69,666 a  1,794,596 
Pall       22,986  469,604 
Parker Hannifin       31,097  1,056,676 
Pitney Bowes       39,864  930,824 
Precision Castparts       26,733  1,601,307 
R.R. Donnelley & Sons       40,269  295,172 

Raytheon       78,278  3,048,145 
Republic Services       61,514  1,054,965 
Robert Half International       29,958 a  534,151 
Rockwell Automation       27,973  610,930 
Rockwell Collins       30,592  998,523 
Ryder System       10,784 a  305,295 
Southwest Airlines   140,772  891,087 
Stericycle       16,371 b  781,388 
Textron       47,746  274,062 
Union Pacific       97,682  4,015,707 
United Parcel Service, Cl. B   191,594  9,430,257 
United Technologies   182,713  7,853,005 
W.W. Grainger       12,441 a  873,109 
Waste Management       94,056 a  2,407,834 
    129,964,831 
Information Technology--17.8%     
Adobe Systems   101,759 b  2,176,625 
Advanced Micro Devices   116,438 a,b  355,136 
Affiliated Computer Services, Cl. A       18,683 b  894,729 
Agilent Technologies       68,615 b  1,054,613 
Akamai Technologies       32,391 b  628,385 
Altera       57,677  1,012,231 
Amphenol, Cl. A       33,809  963,218 
Analog Devices       55,756  1,074,418 
Apple   171,767 b  18,056,147 
Applied Materials   257,379  2,766,824 
Autodesk       43,117 b  724,797 
Automatic Data Processing       97,647  3,433,269 
BMC Software       36,453 b  1,202,949 
Broadcom, Cl. A       84,065 b  1,679,619 
CA       75,574  1,330,858 
Ciena       17,353 a,b  135,006 
Cisco Systems   1,127,064 b  18,900,863 
Citrix Systems       35,031 b  793,102 
Cognizant Technology Solutions, Cl. A       55,906 b  1,162,286 
Computer Sciences       29,075 b  1,071,123 
Compuware       48,920 b  322,383 
Convergys       23,368 b  188,813 
Corning   302,760  4,017,625 
Dell   334,380 b  3,169,922 
eBay   206,646 b  2,595,474 
Electronic Arts       61,114 b  1,111,664 
EMC   391,593 b  4,464,160 

Fidelity National Information Services       36,391  662,316 
Fiserv       31,226 b  1,138,500 
FLIR Systems       26,630 a,b  545,382 
Google, Cl. A       46,217 b  16,086,289 
Harris       25,756  745,379 
Hewlett-Packard   463,662  14,865,004 
Intel  1,070,674  16,113,644 
International Business Machines   258,600  25,055,754 
Intuit       61,568 b  1,662,336 
Jabil Circuit       40,242  223,746 
JDS Uniphase       41,047 a,b  133,403 
Juniper Networks   101,788 b  1,532,927 
KLA-Tencor       33,242  664,840 
Lexmark International, Cl. A       15,201 b  256,441 
Linear Technology       42,489 a  976,397 
LSI   123,413 a,b  375,176 
MasterCard, Cl. A       13,854 a  2,320,268 
McAfee       29,353 b  983,325 
MEMC Electronic Materials       43,326 b  714,446 
Microchip Technology       35,380 a  749,702 
Micron Technology   145,945 a,b  592,537 
Microsoft  1,477,177  27,135,741 
Molex       27,351  375,803 
Motorola   434,589  1,838,311 
National Semiconductor       37,416 a  384,262 
NetApp       62,770 b  931,507 
Novell       66,198 b  282,003 
Novellus Systems       19,033 a,b  316,519 
NVIDIA   106,830 b  1,053,344 
Oracle   742,277  13,412,945 
Paychex       61,538  1,579,680 
QLogic       25,188 a,b  280,091 
QUALCOMM   318,526  12,393,847 
Salesforce.com       19,998 a,b  654,535 
SanDisk       43,168 b  546,075 
Sun Microsystems   144,461 b  1,057,455 
Symantec   160,928 b  2,404,264 
Tellabs       76,245 b  349,202 
Teradata       34,258 b  555,665 
Teradyne       32,390 b  141,868 
Texas Instruments   248,601  4,104,403 
Total System Services       37,908  523,509 
Tyco Electronics       88,262  974,412 
VeriSign       37,071 a,b  699,530 

Western Union   139,916  1,758,744 
Xerox   167,374  761,552 
Xilinx       53,039  1,016,227 
Yahoo!   265,785 b  3,404,706 
    240,620,251 
Materials--3.3%     
Air Products & Chemicals       40,597  2,283,581 
AK Steel Holding       21,564 a  153,536 
Alcoa   183,064  1,343,690 
Allegheny Technologies       19,225 a  421,604 
Ball       18,597  807,110 
Bemis       19,073  399,961 
CF Industries Holdings      9,911  704,969 
Dow Chemical   177,431  1,495,743 
E.I. du Pont de Nemours & Co.   173,032  3,863,805 
Eastman Chemical       14,653 a  392,700 
Ecolab       32,354  1,123,654 
Freeport-McMoRan Copper & Gold       79,103  3,014,615 
International Flavors & Fragrances       15,074  459,154 
International Paper       82,024  577,449 
MeadWestvaco       32,722  392,337 
Monsanto   105,504  8,767,382 
Newmont Mining       93,161  4,169,886 
Nucor       60,698  2,316,843 
Owens-Illinois       32,031 b  462,528 
Pactiv       25,121 b  366,515 
PPG Industries       31,447  1,160,394 
Praxair       59,407  3,997,497 
Rohm & Haas       23,743  1,871,898 
Sealed Air       30,290  418,002 
Sigma-Aldrich       24,150  912,629 
Titanium Metals       16,343 a  89,396 
United States Steel       22,544 a  476,355 
Vulcan Materials       21,073 a  933,323 
Weyerhaeuser       40,489  1,116,282 
    44,492,838 
Telecommunication Services--3.9%     
American Tower, Cl. A       75,602 b  2,300,569 
AT & T  1,136,715  28,645,218 
CenturyTel       19,671 a  553,149 
Embarq       27,328  1,034,365 
Frontier Communications       60,660  435,539 
Qwest Communications International   284,801 a  974,019 
Sprint Nextel   547,439 b  1,954,357 
Verizon Communications   546,269  16,497,324 

Windstream  84,325  679,660 
    53,074,200 
Utilities--4.3%     
AES  129,080 b  749,955 
Allegheny Energy  32,391  750,499 
Ameren  40,338  935,438 
American Electric Power  77,119  1,948,026 
CenterPoint Energy  65,599  684,198 
CMS Energy  43,217 a  511,689 
Consolidated Edison  52,440  2,077,148 
Constellation Energy Group  38,338  792,063 
Dominion Resources  111,202  3,446,150 
DTE Energy  31,270  866,179 
Duke Energy  247,028  3,537,441 
Dynergy, Cl. A   97,008 a,b  136,781 
Edison International  62,541  1,801,806 
Entergy  36,794  2,505,303 
EQT  25,087  785,976 
Exelon  126,851  5,757,767 
FirstEnergy  58,474  2,257,096 
FPL Group  78,394  3,976,928 
Integrys Energy  14,663  381,825 
Nicor  8,634  286,908 
NiSource  52,641  515,882 
Northeast Utilities  33,154  715,795 
Pepco Holdings  41,427  517,009 
PG & E  70,517 a  2,695,160 
Pinnacle West Capital  19,318  513,086 
PPL  71,855  2,062,957 
Progress Energy  53,120  1,926,131 
Public Service Enterprise Group  97,578  2,875,624 
Questar  33,220  977,665 
SCANA  22,540  696,261 
Sempra Energy  47,229  2,183,869 
Southern  148,992  4,562,135 
TECO Energy  40,782 a  454,719 
Wisconsin Energy  22,440  923,855 
Xcel Energy  85,546  1,593,722 
    57,403,046 
Total Common Stocks     
       (cost $1,554,293,415)    1,335,229,098 
  Principal   
Short-Term Investments--.2%  Amount ($)  Value ($) 
U.S. Treasury Bills     
0.17%, 6/18/09     

       (cost $2,202,184)  2,203,000 c  2,202,284 
 
Other Investment--1.0%  Shares  Value ($) 
Registered Investment Company;     
Dreyfus Institutional Preferred     
       Plus Money Market Fund     
       (cost $13,957,000)  13,957,000 d  13,957,000 
 
Investment of Cash Collateral for     
Securities Loaned--6.4%     
Registered Investment Company;     
Dreyfus Institutional Cash     
       Advantage Plus Fund     
       (cost $86,322,903)  86,322,903 d  86,322,903 
 
Total Investments (cost $1,656,775,502)  106.2%  1,437,711,285 
Liabilities, Less Cash and Receivables  (6.2%)  (83,735,153) 
Net Assets  100.0%  1,353,976,132 

a      All or a portion of these securities are on loan. At March 31, 2009, the total market value of the fund's securities on loan is $85,073,296 and the total market value of the collateral held by the fund is $86,322,903.
b      Non-income producing security.
c      All or partially held by a broker as collateral for open financial futures positions.
d      Investment in affiliated money market mutual fund.

At March 31, 2009, the aggregate cost of investment securities for income tax purposes was $1,656,775,502.

Net unrealized depreciation on investments was $219,064,217 of which $324,708,528 related to appreciated investment securities and $543,772,745 related to depreciated investment securities.

STATEMENT OF FINANCIAL FUTURES         
March 31, 2009 (Unaudited)         
 
 
    Market Value    Unrealized 
    Covered by    Appreciation 
  Contracts  Contracts ($)  Expiration  at 3/31/2009 ($) 
Financial Futures Long         
Standard & Poor's 500 E-Mini  483  19,194,420  June 2009  1,702,296 
 
Gross Unrealized Appreciation        1,702,296 

Various inputs are used in determining the value of the fund's investments relating to Financial Accounting Standard No. 157 (FAS 157), 
                                                                         Fair Value Measurements. 
                                                                         These inputs are summarized in the three broad levels listed below. 
                                                                         Level 1 - quoted prices in active markets for identical investments. 
                                                                         Level 2 - other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, 
                                                                         credit risk, etc.) 
                                                                         Level 3 - significant unobservable inputs (including fund's own assumptions in determining the fair value of investments). 
The inputs or methodology used for valuing securities are not necessarily an indication of the risk associated with investing 
in those securities. 

The following is a summary of the inputs used as of March 31, 2009 in valuing the fund's investments:   
      Level 3 -   
    Level 2 - Other  Significant   
  Level 1 -Quoted  Significant Observable  Unobservable   
Assets ($)  Prices  Inputs  Inputs  Total 
Investment in Securities  1,435,509,001  2,202,284  0  1,437,711,285 
Other Financial Instruments+  1,702,296  0  0  1,702,296 
Liabilities ($)         
Other Financial Instruments+  0  0  0  0 

† Other financial instruments include derivative instruments, such as futures, forward currency exchange contracts, swap contracts and options contracts. Amounts shown represents unrealized appreciation (depreciation) at period end.

Portfolio valuation: Investments in securities are valued at the last sales price on the securities exchange or national securities market on which such securities are primarily traded. Securities listed on the National Market System for which market quotations are available are valued at the official closing price or, if there is no official closing price that day, at the last sales price. Securities not listed on an exchange or the national securities market, or securities for which there were no transactions, are valued at the average of the most recent bid and asked prices, except for open short positions, where the asked price is used for valuation purposes. Bid price is used when no asked price is available. Registered investment companies that are not traded on an exchange are valued at their net asset value. When market quotations or official closing prices are not readily available, or are determined not to reflect accurately fair value, such as when the value of a security has been significantly affected by events after the close of the exchange or market on which the security is principally traded (for example, a foreign exchange or market), but before the fund calculates its net asset value, the fund may value these investments at fair value as determined in accordance with the procedures approved by the Board of Directors. Fair valuing of securities may be determined with the assistance of a pricing service using calculations based on indices of domestic securities and other appropriate indicators, such as prices of relevant ADRs and futures contracts. For other securities that are fair valued by the Board of Directors, certain factors may be considered such as: fundamental analytical data, the nature and duration of restrictions on disposition, an evaluation of the forces that influence the market in which the securities are purchased and sold, and public trading in similar securities of the issuer or comparable issuers. Financial futures are valued at the last sales price.

Pursuant to a securities lending agreement with The Bank of New York Mellon, a subsidiary of BNY Mellon and an affiliate of Dreyfus, the fund may lend securities to qualified institutions. It is the fund’s policy that, at origination, all loans are secured by collateral of at least 102% of the value of U.S. securities loaned and 105% of the value of foreign securities loaned. Collateral equivalent to at least 100% of the market value of securities on loan is maintained at all times. Collateral

is either in the form of cash, which can be invested in certain money market mutual funds managed by Dreyfus, U.S. Government and Agency securities or letters of credit. The fund is entitled to receive all income on securities loaned, in addition to income earned as a result of the lending transaction. Although each security loaned is fully collateralized, the fund bears the risk of delay in recovery of, or loss of rights in, the securities loaned should a borrower fail to return the securities in a timely manner.

The fund may invest in financial futures contracts in order to gain exposure to or protect against changes in the market. The fund is exposed to market risk as a result of changes in the value of the underlying financial instruments. Investments in financial futures require the fund to “mark to market” on a daily basis, which reflects the change in the market value of the contract at the close of each day’s trading. Accordingly, variation margin payments are received or made to reflect daily unrealized gains or losses. When the contracts are closed, the fund recognizes a realized gain or loss. These investments require initial margin deposits with a broker, which consist of cash or cash equivalents.

The amount of these deposits is determined by the exchange or Board of Trade on which the contract is traded and is subject to change.

Additional investment related disclosures are hereby incorporated by reference to the annual and semi-annual reports previously filed with the Securities and Exchange Commission on Form N-CSR.

Item 2. Controls and Procedures.

(a) The Registrant's principal executive and principal financial officers have concluded, based on their evaluation of the Registrant's disclosure controls and procedures as of a date within 90 days of the filing date of this report, that the Registrant's disclosure controls and procedures are reasonably designed to ensure that information required to be disclosed by the Registrant on Form N-Q is recorded, processed, summarized and reported within the required time periods and that information required to be disclosed by the Registrant in the reports that it files or submits on Form N-Q is accumulated and communicated to the Registrant's management, including its principal executive and principal financial officers, as appropriate to allow timely decisions regarding required disclosure.

(b) There were no changes to the Registrant's internal control over financial reporting that occurred during the Registrant's most recently ended fiscal quarter that have materially affected, or are reasonably likely to materially affect, the Registrant's internal control over financial reporting.

Item 3. Exhibits.

(a) Certifications of principal executive and principal financial officers as required by Rule 30a-2(a) under the Investment Company Act of 1940.

FORM N-Q

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.

Dreyfus Stock Index Fund, Inc.

By:  /s/ J. David Officer 
  J. David Officer 
President
 
Date:  May 28, 2009 

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/ J. David Officer 
  J. David Officer 
President
 
Date:  May 28, 2009 
 
By:  /s/ James Windels 
  James Windels 
Treasurer
 
Date:  May 28, 2009 

EXHIBIT INDEX

(a) Certifications of principal executive and principal financial officers as required by Rule 30a-2(a) under the Investment Company Act of 1940. (EX-99.CERT)