Domini Institutional Social Equity Fund (the Fund), a series of Domini Institutional Trust, invests substantially all of its assets in Domini Social Equity Trust (Equity Trust) (formerly Domini Social Index Trust) and owns a pro rata interest in the Equity Trust’s net assets. The Equity Trust is a series of Domini Social Trust, formerly Domini Social Index Portfolio. At October 31, 2006, the Fund owned approximately 17.1% of the Equity Trust’s outstanding interests. The Equity Trust’s Schedule of Investments is set forth below.

Domini Institutional Social Equity Fund^SM

Quarterly Holdings Report
October 31, 2006 (Unaudited)

Domini Institutional Social Equity Fund invests in an underlying portfolio, Domini Social Equity Trust.
The Trust’s Portfolio of Investments is contained in
this report.

Domini Social Equity Trust

Portfolio of Investments

October 31, 2006 (Unaudited)

Security	Shares		Value
Consumer Discretionary – 13.3%
American Greetings Corporation, Class A		13,100	$	313,221
AutoZone, Inc. (a)		12,531		1,403,472
Bandag, Inc.		2,900		127,281
Bed Bath & Beyond (a)		67,100		2,703,459
Best Buy Co., Inc.		95,200		5,259,799
Black & Decker Corp.		17,561		1,473,017
Bright Horizons Family Solutions, Inc. (a)		6,400		245,888
Centex Corporation		28,200		1,474,860
Champion Enterprises, Inc. (a)		19,000		175,940
Charming Shoppes, Inc. (a)		26,300		389,240
Circuit City Stores, Inc.		33,500		903,830
Claire’s Stores, Inc.		22,200		629,370
Cooper Tire and Rubber Company		15,300		164,169
Darden Restaurants, Inc.		34,800		1,458,120
DeVry, Inc. (a)		14,100		343,335
Disney (Walt) Company (The)		493,050		15,511,352
Dollar General Corporation		74,351		1,043,145
Dow Jones & Company		14,800		519,332
eBay Inc. (a)		276,572		8,886,258
Emmis Communications Corporation, Class A (a)		7,660		94,524
Family Dollar Stores Inc.		35,800		1,054,310
Foot Locker, Inc.		36,400		844,116
Gaiam, Inc. (a)		4,100		59,491
Gap Inc.		127,797		2,686,293
Genuine Parts Company		40,700		1,852,664
Harley-Davidson, Inc.		62,300		4,275,649
Harman International Industries, Inc.		15,520		1,588,472
Hartmarx Corporation (a)		8,500		60,435
Home Depot, Inc. (The)		486,044		18,144,023
Horton (D.R.), Inc.		64,733		1,516,694
Interface, Inc., Class A (a)		11,400		165,870
Johnson Controls, Inc.		46,000		3,750,840
KB Home		17,800		799,932
Lee Enterprises, Inc.		10,900		310,977
Leggett & Platt, Incorporated		42,900		1,001,715
Limited Brands		80,530		2,373,219
Consumer Discretionary (Continued)
Liz Claiborne, Inc.		24,500	$	1,033,165
Lowe’s Companies, Inc.		359,973		10,849,586
Mattel, Inc.		89,885		2,034,098
McClatchy Newspapers A, Class A		8,600		372,810
McDonald’s Corporation		291,093		12,202,619
McGraw-Hill Companies		83,000		5,326,110
Media General, Inc., Class A		5,600		207,760
Men’s Wearhouse, Inc.		12,650		504,103
Meredith Corporation		9,300		488,250
Modine Manufacturing Company		7,800		185,718
New York Times Company, Class A		34,300		829,031
Newell Rubbermaid, Inc.		64,878		1,867,189
NIKE, Inc., Class B		44,500		4,088,660
Nordstrom, Inc.		54,400		2,575,840
Office Depot (a)		67,300		2,825,927
Omnicom Group, Inc.		40,100		4,068,145
Penney (J.C.) Company, Inc.		52,400		3,942,052
Pep Boys — Manny, Moe & Jack		12,900		182,922
Phillips-Van Heusen Corporation		11,700		535,392
Pulte Homes, Inc.		50,300		1,558,797
Radio One, Inc. (a)		2,300		15,847
RadioShack Corporation		32,300		576,232
Ruby Tuesday, Inc.		14,000		388,500
Scholastic Corporation (a)		5,100		160,242
Scripps (E.W.) Company (The), Class A		19,900		984,254
Snap-On Incorporated		13,850		651,366
Spartan Motors, Inc.		3,100		64,387
Stanley Works		19,300		919,645
Staples, Inc.		172,084		4,438,046
Starbucks Corporation (a)		178,314		6,731,354
Stride Rite Corporation		9,200		135,700
Target Corporation		202,400		11,978,032
Tiffany & Co.		32,800		1,171,616
Timberland Company (The) (a)		12,200		351,970
Time Warner, Inc.		959,220		19,193,992
TJX Companies, Inc.		106,900		3,094,755

Domini Social Equity Trust / Portfolio of Investments (Continued)

October 31, 2006 (Unaudited)

Security	Shares		Value
Consumer Discretionary (Continued)
Tribune Company		43,800	$	1,459,854
Tupperware Corporation		13,300		282,359
Univision Communications, Inc., Class A (a)		59,800		2,096,588
Valassis Communications Inc. (a)		11,400		171,114
Washington Post Company, Class B		1,300		979,030
Wendy’s International, Inc.		27,300		944,580
Whirlpool Corporation		18,536		1,611,334
				197,683,283
Consumer Staples – 12.0%
Alberto-Culver Company, Class B		17,450		886,635
Avon Products, Inc.		106,143		3,227,809
Campbell Soup Company		54,900		2,052,162
Chiquita Brands International, Inc.		10,000		137,000
Church & Dwight Co., Inc.		15,400		624,778
Clorox Company		35,900		2,317,704
Coca-Cola Company		480,000		22,425,600
Colgate-Palmolive Company		122,000		7,804,340
Costco Wholesale Corporation		110,330		5,889,415
CVS Corporation		193,900		6,084,582
Dean Foods (a)		31,600		1,323,724
Estée Lauder Companies, Inc. (The), Class A		28,000		1,130,920
General Mills Incorporated		83,900		4,767,198
Green Mountain Coffee, Inc. (a)		1,300		51,441
Hain Celestial Group, Inc. (The) (a)		9,500		268,185
Heinz (H.J.) Company		78,793		3,321,913
Hershey Foods Corporation		41,700		2,206,347
Kellogg Company		57,700		2,902,887
Kimberly-Clark Corporation		107,664		7,161,809
Kroger Company		170,700		3,839,043
Longs Drug Stores Corporation		6,600		284,064
Consumer Staples (Continued)
McCormick & Company, Inc.		31,300		$1,170,620
PepsiAmericas, Inc.		14,400		294,480
PepsiCo, Inc.		387,970		24,612,817
Procter & Gamble Company		748,487		47,446,591
Safeway Inc.		105,700		3,103,352
Smucker (J.M.) Company		13,605		666,645
SUPERVALU, Inc.		47,580		1,589,172
Sysco Corporation		146,300		5,117,574
Tootsie Roll Industries, Inc.		6,337		201,390
United Natural Foods, Inc. (a)		10,000		349,000
Walgreen Company		237,559		10,376,577
Whole Foods Market, Inc.		33,400		2,132,256
Wild Oats Markets, Inc. (a)		6,550		117,769
Wrigley (Wm.) Jr. Company		52,000		2,701,400
				178,587,199
Energy – 3.2%
Anadarko Petroleum Corporation		108,470		5,035,177
Apache Corporation		77,124		5,037,740
Cameron International Corp. (a)		26,500		1,327,650
Chesapeake Energy Corp		90,200		2,926,088
Devon Energy Corporation		104,244		6,967,669
EOG Resources, Inc.		57,200		3,805,516
Helmerich & Payne, Inc.		25,000		598,750
Kinder Morgan, Inc.		24,500		2,574,950
National Oilwell Varco, Inc. (a)		41,200		2,488,480
Newfield Exploration (a)		30,600		1,248,174
Noble Energy, Inc.		42,000		2,042,460
Ormat Technologies Inc.		1,800		69,120
Pioneer Natural Resources Company		29,700		1,209,681
Rowan Companies, Inc.		26,200		874,556
Smith International		46,792		1,847,348
Sunoco, Inc.		31,035		2,052,345
Williams Companies, Inc.		140,477		3,431,853

Domini Social Equity Trust / Portfolio of Investments (Continued)

October 31, 2006 (Unaudited)

Security	Shares		Value
Energy (Continued)
XTO Energy Inc.		85,593	$	3,993,769
				47,531,326
Financials – 22.6%
AFLAC, Inc.		116,300		5,224,196
Allied Capital Corporation		34,000		1,072,020
AMBAC Financial Group, Inc.		25,200		2,103,948
American Express Company		286,600		16,568,346
AmSouth Bancorporation		81,000		2,447,820
BB&T Corporation		127,100		5,531,392
Capital One Financial Corporation		71,700		5,687,961
Cathay General Bancorp		12,290		423,391
Chicago Mercantile Exchange		8,300		4,158,300
Chittenden Corporation		10,920		322,031
Chubb Corporation		96,200		5,113,030
Cincinnati Financial Corporation		40,417		1,845,036
CIT Group		46,700		2,430,735
Comerica Incorporated		38,100		2,217,039
Edwards (A.G.), Inc.		18,187		1,037,568
Equity Office Properties Trust		82,500		3,506,250
Fannie Mae		228,196		13,522,895
Fifth Third Bancorp		131,711		5,248,683
First Horizon National Corporation		29,500		1,159,940
FirstFed Financial Corp. (a)		4,100		253,257
Franklin Resources, Inc.		39,000		4,444,440
Freddie Mac		162,800		11,231,572
Genl Growth Properties		57,434		2,980,825
Hartford Financial Services Group (The)		71,800		6,258,806
Heartland Financial USA, Inc.		3,000		85,980
Janus Capital Group Inc.		49,126		986,450
KeyCorp		95,000		3,528,300
Lincoln National Corporation		67,859		4,296,153
M&T Bank Corp.		18,490		2,252,267
Maguire Properties Inc.		6,700		286,492
Marsh & McLennan Companies, Inc.		129,600		3,815,424
Financials (Continued)
MBIA, Inc.		32,200	$	1,997,044
Medallion Financial Corp.		3,400		40,630
Mellon Financial Corporation		97,200		3,771,360
Merrill Lynch & Co., Inc.		209,061		18,276,113
MGIC Investment Corporation		20,100		1,181,076
Moody’s Corporation		55,800		3,699,540
Morgan (J.P.) Chase & Co.		817,151		38,765,643
National City Corporation		141,700		5,278,325
Northern Trust Corporation		43,500		2,554,320
PNC Financial Services Group		70,000		4,902,100
Popular Inc.		65,896		1,198,648
Principal Financial Group, Inc.		64,000		3,615,360
Progressive Corporation (The)		183,612		4,437,902
ProLogis		57,800		3,657,006
Regions Financial Corp. (New)		107,600		4,083,420
SAFECO Corporation		27,700		1,611,863
Schwab (Charles) Corporation		243,800		4,442,036
SLM Corporation		97,200		4,731,696
Sovereign Bancorp		83,955		2,003,166
St. Paul Travelers Companies, Inc. (The)		162,364		8,301,671
State Street Corporation		78,600		5,048,478
SunTrust Banks, Inc.		86,200		6,808,938
Synovus Financial Corporation		75,450		2,216,721
T. Rowe Price Group, Inc.		62,300		2,947,413
TradeStation Group, Inc. (a)		5,100		79,815
U.S. Bancorp		417,821		14,139,063
UnumProvident Corporation		81,600		1,614,048
Wachovia Corporation		443,974		24,640,557
Wainwright Bank & Trust Co.		1,056		11,690
Washington Mutual, Inc.		227,942		9,641,947
Wells Fargo & Company		792,396		28,756,051

Domini Social Equity Trust / Portfolio of Investments (Continued)

October 31, 2006 (Unaudited)

Security	Shares		Value
Financials (Continued)
Wesco Financial Corporation		300	$	143,823
				334,638,010
Health Care – 13.7%
Affymetrix Inc (a)		16,100		410,550
Allergan, Inc.		35,805		4,135,478
Amgen, Inc. (a)		275,753		20,932,410
Bard (C.R.), Inc.		24,600		2,016,216
Bausch & Lomb Incorporated		12,200		653,188
Baxter International, Inc.		153,200		7,042,604
Becton Dickinson and Company		58,200		4,075,746
Biogen Idec Inc. (a)		80,850		3,848,460
Biomet, Inc.		58,200		2,202,288
Boston Scientific Corporation (a)		278,219		4,426,464
CIGNA Corporation		26,100		3,053,178
Cross Country Healthcare, Inc. (a)		5,200		100,672
Dionex Corporation (a)		4,800		261,120
Fisher Scientific International (a)		29,000		2,482,980
Forest Laboratories, Inc. (a)		75,596		3,699,668
Gen-Probe Inc. (a)		12,300		588,801
Genzyme Corporation (a)		61,409		4,145,722
Gilead Sciences (a)		107,800		7,427,420
Health Management Association, Class A		56,900		1,120,930
Hillenbrand Industries, Inc.		14,300		839,124
Humana, Inc. (a)		39,200		2,352,000
IMS Health, Inc.		48,013		1,337,162
Invacare Corporation		7,700		168,091
Invitrogen Corporation (a)		12,200		707,722
Johnson & Johnson		689,537		46,474,793
King Pharmaceuticals Inc. (a)		55,800		933,534
Manor Care, Inc.		17,300		830,227
McKesson HBOC, Inc.		71,120		3,562,401
MedImmune, Inc. (a)		56,900		1,823,076
Medtronic, Inc.		271,034		13,193,935
Merck & Co., Inc.		512,000		23,255,040
Millipore Corporation (a)		12,800		825,984
Molina Healthcare Inc. (a)		2,900		113,767
Mylan Laboratories, Inc.		50,075		1,026,538
Health Care (Continued)
Patterson Companies, Inc. (a)		31,900	$	1,047,915
Quest Diagnostics Incorporated		38,200		1,900,068
St. Jude Medical, Inc. (a)		83,800		2,878,530
Stryker Corporation		69,035		3,609,840
Synovis Life Technologies, Inc. (a)		2,600		19,188
Thermo Electron Corporation (a)		37,500		1,607,625
UnitedHealth Group Incorporated		317,782		15,501,406
Waters Corporation (a)		24,400		1,215,120
Watson Pharmaceuticals (a)		24,300		653,913
Zimmer Holdings, Inc. (a)		57,691		4,154,329
				202,655,223
Industrials – 6.8%
3M Company		177,607		14,002,536
Alaska Air Group, Inc. (a)		9,500		381,425
American Power Conversion		39,500		1,194,085
AMR Corporation (a)		50,200		1,422,668
Apogee Enterprises, Inc.		6,700		107,803
Avery Dennison Corporation		22,500		1,420,650
Baldor Electric Company		7,000		224,560
Banta Corporation		5,750		254,610
Brady Corporation, Class A		12,000		444,000
CLARCOR, Inc.		12,400		403,992
Cooper Industries, Inc., Class A		21,800		1,950,010
Cummins, Inc.		12,500		1,587,250
Deere & Company		54,100		4,605,533
Deluxe Corporation		11,200		253,904
Donaldson Company, Inc.		16,900		634,595
Donnelley (R.R.) & Sons Company		51,500		1,743,790
Emerson Electric Company		95,800		8,085,520
Energy Conversion Devices (a)		8,100		297,999
Fastenal Company		28,700		1,154,888
FedEx Corporation		72,300		8,281,241
GATX Corporation		12,200		531,554
Graco, Inc.		16,152		658,356

Domini Social Equity Trust / Portfolio of Investments (Continued)

October 31, 2006 (Unaudited)

Security	Shares		Value
Industrials (Continued)
Grainger (W.W.), Inc.		17,700	$	1,288,206
Granite Construction Incorporated		8,225		428,523
Herman Miller, Inc.		15,000		514,200
HNI Corporation		11,900		535,143
Hubbell Incorporated, Class B		14,460		716,059
Ikon Office Solutions		30,800		459,228
Illinois Tool Works, Inc.		97,900		4,692,347
JetBlue Airways Corporation (a)		38,550		484,188
Kadant Inc. (a)		3,700		101,010
Kansas City Southern Industries, Inc. (a)		17,200		488,308
Kelly Services, Inc.		5,075		146,059
Lawson Products, Inc.		600		29,046
Lincoln Electric Holdings, Inc.		10,100		621,049
Masco Corporation		93,496		2,585,164
Milacron, Inc. (a)		12,633		11,370
Monster Worldwide (a)		29,700		1,203,147
Nordson Corporation		8,000		368,400
Norfolk Southern Corporation		98,000		5,151,860
Pall Corp.		28,600		912,340
Pitney Bowes, Inc.		52,200		2,438,262
Robert Half International, Inc.		40,700		1,487,585
Ryder System, Inc.		14,700		773,955
Smith (A.O.) Corporation		5,200		182,832
Southwest Airlines Co.		187,262		2,814,548
SPX Corporation		13,730		789,750
Standard Register Company		3,200		43,296
Steelcase, Inc.		13,300		220,381
Tennant Company		4,600		127,190
Thomas & Betts Corporation (a)		12,400		638,972
Toro Company		9,700		418,652
Trex Company, Inc. (a)		2,600		68,692
United Parcel Service, Inc., Class B		255,159		19,226,230
YRC Worldwide Inc. (a)		13,180		510,593
				100,117,554
Information Technology – 19.1%
3Com Corporation (a)		93,700		455,382
Adaptec, Inc. (a)		27,400		124,122
ADC Telecommunications (a)		27,828		398,219
Information Technology (Continued)
Adobe Systems Incorporated (a)		136,600		$5,224,950
Advanced Micro Devices, Inc. (a)		115,500		2,456,685
Advent Software, Inc. (a)		4,200		155,484
Analog Devices, Inc.		83,900		2,669,698
Andrew Corporation (a)		38,000		351,880
Apple Computer, Inc. (a)		200,654		16,269,026
Applied Materials, Inc.		329,000		5,721,310
Arrow Electronics, Inc. (a)		29,000		865,650
Autodesk, Inc. (a)		55,100		2,024,925
Automatic Data Processing, Inc.		131,074		6,480,299
BMC Software, Inc. (a)		48,700		1,476,097
CDW Corporation		14,200		932,514
Ceridian Corporation (a)		32,400		763,668
Cisco Systems, Inc. (a)		1,436,858		34,671,384
Coherent, Inc. (a)		7,700		248,171
Compuware Corporation (a)		86,000		691,440
Convergys Corp. (a)		31,900		676,599
Dell Inc. (a)		535,394		13,026,136
Electronic Arts Inc. (a)		72,300		3,823,947
Electronic Data Systems Corporation		122,200		3,095,326
EMC Corporation (a)		539,900		6,613,775
Entegris, Inc. (a)		32,800		367,688
Gerber Scientific, Inc. (a)		5,700		83,277
Hewlett-Packard Company		645,310		24,999,309
Imation Corporation		7,900		361,583
Intel Corporation		1,359,155		29,004,368
Itron, Inc. (a)		6,100		332,084
Lexmark International Group, Inc. (a)		23,400		1,488,006
LSI Logic Corporation (a)		95,000		954,750
Lucent Technologies, Inc. (a)		1,049,192		2,549,537
Merix Corporation (a)		4,750		42,750
Micron Technology, Inc. (a)		167,900		2,426,155
Microsoft Corporation		2,036,210		58,459,589
Molex Incorporated		33,546		1,170,755

Domini Social Equity Trust / Portfolio of Investments (Continued)

October 31, 2006 (Unaudited)

Security	Shares		Value
Information Technology (Continued)
National Semiconductor Corporation		70,900	$	1,722,161
Novell, Inc. (a)		62,500		375,000
Novellus Systems, Inc. (a)		29,300		810,145
Palm Inc. (a)		21,108		324,008
Paychex, Inc.		78,700		3,107,076
Plantronics Inc.		11,000		232,210
Polycom Inc. (a)		21,000		575,400
Qualcomm, Inc.		389,500		14,173,905
Red Hat, Inc. (a)		45,400		743,652
Salesforce.com, Inc. (a)		20,100		784,302
Sapient Corporation (a)		19,800		107,910
Solectron Corporation (a)		217,400		726,116
Sun Microsystems, Inc. (a)		826,300		4,486,809
Symantec Corporation (a)		235,200		4,666,368
Tektronix, Inc.		19,900		604,363
Tellabs, Inc. (a)		105,600		1,113,024
Texas Instruments, Inc.		361,362		10,905,905
Xerox Corporation (a)		225,400		3,831,800
Xilinx, Inc.		80,800		2,061,208
				282,807,900
Materials – 1.8%
Air Products & Chemicals, Inc.		52,400		3,650,708
Airgas, Inc.		16,800		635,208
Aleris International, Inc. (a)		7,500		386,325
Bemis Company, Inc.		24,900		837,138
Cabot Corporation		14,900		589,295
Calgon Carbon Corporation (a)		10,100		46,662
Caraustar Industries, Inc. (a)		7,200		77,976
Chaparral Steel Company		11,200		465,808
Crown Holdings, Inc. (a)		39,900		775,656
Ecolab, Inc.		42,500		1,927,375
Fuller (H.B.) Company		14,200		352,018
Lubrizol Corporation		16,300		733,500
MeadWestvaco Corp.		43,112		1,186,442
Minerals Technologies, Inc.		4,700		259,252
Nucor Corporation		73,193		4,275,203
Praxair, Inc.		76,400		4,603,100
Rock-Tenn Company, Class A		7,800		160,992
Materials (Continued)
Rohm & Haas Company		34,087	$	1,766,388
Schnitzer Steel Industries Inc., Class A		5,300		185,288
Sealed Air Corporation		18,800		1,118,976
Sigma-Aldrich Corporation		15,800		1,186,738
Sonoco Products Company		23,545		835,377
Valspar Corporation		24,200		648,318
Wausau-Mosinee Paper Corporation		10,700		145,092
Wellman, Inc.		4,400		16,588
Worthington Industries, Inc.		17,100		295,488
				27,160,911
Telecommunication Services – 6.2%
AT&T Inc.		914,167		31,310,220
BellSouth Corporation		428,279		19,315,383
Citizens Communications Company		75,167		1,101,948
Sprint Corp. - FON Group		704,599		13,168,955
Telephone and Data Systems, Inc.		24,900		1,216,365
Verizon Communications		684,022		25,308,814
				91,421,685
Utilities – 0.9%
AGL Resources, Inc.		18,500		693,750
Cascade Natural Gas Corporation		2,900		74,646
Cleco Corporation		12,200		313,540
Energen Corporation		17,200		736,504
Equitable Resources, Inc.		27,900		1,130,508
IDACORP, Inc.		10,200		402,186
KeySpan Corporation		41,600		1,688,128
MGE Energy, Inc.		5,100		174,420
National Fuel Gas Company		19,100		714,340
NICOR, Inc.		10,300		473,388
NiSource, Inc.		64,847		1,508,990
Northwest Natural Gas Company		6,500		268,905
OGE Energy Corporation		21,600		833,328
Peoples Energy Corporation		9,100		397,579

Domini Social Equity Trust / Portfolio of Investments (Continued)

October 31, 2006 (Unaudited)

Security	Shares		Value
Utilities (Continued)
Pepco Holdings, Inc.		45,300	$	1,151,526
Questar Corporation		20,400		1,662,192
Southern Union Company		24,021		664,901
WGL Holdings		11,200		363,440
				13,252,271


Total Investments — 99.6%
(Cost $1,061,841,736)(b)	$	1,475,855,362
Other Assets, less liabilities — 0.4%		5,654,147
Net Assets — 100.0%	$	1,481,509,509

(a)

Non-income producing security.

(b)

The aggregate cost for federal income tax purposes is $1,175,232,479. The aggregate gross unrealized appreciation is $358,660,441, and the aggregate gross unrealized depreciation is $58,037,558, resulting in net unrealized appreciation of $300,622,883.

Copyright in the Domini 400 Social Index^SM is owned by KLD Research & Analytics, Inc., and the Index is reproduced here by permission. No portion of the Index may be reproduced or distributed by any means or in any medium without the express written consent of the copyright owner.

SEE NOTES TO PORTFOLIO OF INVESTMENTS

DOMINI SOCIAL EQUITY TRUST

NOTES TO PORTFOLIO OF INVESTMENTS
October 31, 2006 (UNAUDITED)

ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES

Domini Social Equity Trust (formerly Domini Social Index Trust) (the ‘‘Equity Trust’’) is a series of Domini Social Trust (formerly Domini Social Index Portfolio) (the ‘‘Trust’’) which is registered under the Investment Company Act of 1940 as a diversified, open-end management investment company that was organized as a trust under the laws of the State of New York on June 7, 1989. The Equity Trust intends to correlate its investment portfolio as closely as is practicable with the Domini 400 Social Index,^SM which is a common stock index developed and maintained by KLD Research & Analytics, Inc. The Declaration of Trust permits the Trustees to issue an unlimited number of beneficial interests in the Equity Trust. The Equity Trust commenced operations effective on August 10, 1990, and began investment operations on June 3, 1991.

The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. The following is a summary of the Equity Trust’s significant accounting policies.

(A) Valuation of Investments. The Equity Trust values securities listed or traded on national securities exchanges at the last sale price or, if there have been no sales that day, at the mean of the current bid and ask price that represents the current value of the security. Securities listed on the NASDAQ National Market System are valued using the NASDAQ Official Closing Price (NOCP). If an NOCP is not available for a security listed on the NASDAQ National Market System, the security will be valued at the last sale price or, if there have been no sales that day, at the mean of the current bid and ask price. Equity Trust securities for which there are no such quotations or valuations are valued at fair value as determined in good faith by or at the direction of the Equity Trust’s Board of Trustees.

(B) Investment Transactions and Investment Income. Investment transactions are accounted for on the trade date. Realized gains and losses from security transactions are determined on the basis of identified cost. Dividend income is recorded on the ex-dividend date.

(C) Federal Taxes. The Equity Trust will be treated as a partnership for U.S. federal income tax purposes and is therefore not subject to U.S. federal income tax. As such, each investor in the Equity Trust will be taxed

on its share of the Equity Trust’s ordinary income and capital gains. It is intended that the Equity Trust will be managed in such a way that an investor will be able to satisfy the requirements of the Internal Revenue Code applicable to regulated investment companies.

(D) Subsequent Event. Effective November 30, 2006, the Domini Social Equity Trust will be actively managed and submanaged by Wellington Management Company, LLP.

Domini Social Equity Trust — Notes to Portfolio of Investments 9

The Fund’s Portfolio of Investments as of the date on the cover of this report has not been audited. This report is provided for the general information of the Fund’s shareholders. For more information regarding the Fund and its holdings, please see the Fund’s most recent Prospectus and Annual Report.

Item 2. Controls and Procedures.

(a) Within 90 days prior to the filing of this report on Form N-Q, Amy L. Domini, the registrant’s President and Principal Executive Officer, and Carole M. Laible, the registrant’s Treasurer and Principal Financial Officer, reviewed the registrant’s disclosure controls and procedures (as defined in Rule 30a-3(c) of the Investment Company Act of 1940) and evaluated their effectiveness. Based on their evaluation, Ms. Domini and Ms. Laible determined that the disclosure controls and procedures adequately ensure that information required to be disclosed by the registrant in this report on Form N-Q is recorded, processed, summarized, and reported within the time periods required by the Securities and Exchange Commission’s rules and forms.

(b) There were no changes in the registrant’s internal control over financial reporting (as defined in Rule 30a-3(d) under the Investment Company Act of 1940) that occurred during the registrant’s last fiscal quarter that have materially affected, or are reasonably likely to materially affect, the registrant’s internal control over financial reporting.

Item 3. Exhibits.

Separate certifications required by Rule 30a-2(a) under the Investment Company Act of 1940 for each principal executive officer and principal financial officer of the registrant are filed herewith.

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.

DOMINI INSTITUTIONAL TRUST

By: /s/ Amy L. Domini

Amy L. Domini

President

Date: December 28, 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/ Amy L. Domini

Amy L. Domini

President (Principal Executive Officer)

Date: December 28, 2006

By: /s/ Carole M. Laible

Carole M. Laible

Treasurer (Principal Financial Officer)

Date: December 28, 2006