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Form 10-K - Annual report [Section 13 and 15(d), not S-K Item 405]:
SEC Accession No. 0001193125-12-041246
Filing Date
2012-02-06
Accepted
2012-02-06 16:39:53
Documents
15
Period of Report
2011-12-31

Document Format Files

Seq Description Document Type Size
1 FORM 10-K d276280d10k.htm 10-K 2284102
2 SUBSIDIARIES OF THE REGISTRANT d276280dex211.htm EX-21.1 4443
3 CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM d276280dex231.htm EX-23.1 1634
4 CERTIFICATION OF CEO PURSUANT TO SECTION 302 d276280dex311.htm EX-31.1 10212
5 CERTIFICATION OF CFO PURSUANT TO SECTION 302 d276280dex312.htm EX-31.2 10217
6 CERTIFICATION OF CEO PURSUANT TO SECTION 906 d276280dex321.htm EX-32.1 4854
7 CERTIFICATION OF CFO PURSUANT TO SECTION 906 d276280dex322.htm EX-32.2 4945
14 GRAPHIC g276280g42z26.jpg GRAPHIC 55192
15 GRAPHIC g276280g94z87.jpg GRAPHIC 65444
  Complete submission text file 0001193125-12-041246.txt   20308499

Data Files

Seq Description Document Type Size
8 XBRL INSTANCE DOCUMENT nst-20111231.xml EX-101.INS 4235381
9 XBRL TAXONOMY EXTENSION SCHEMA nst-20111231.xsd EX-101.SCH 131901
10 XBRL TAXONOMY EXTENSION CALCULATION LINKBASE nst-20111231_cal.xml EX-101.CAL 138610
11 XBRL TAXONOMY EXTENSION DEFINITION LINKBASE nst-20111231_def.xml EX-101.DEF 539229
12 XBRL TAXONOMY EXTENSION LABEL LINKBASE nst-20111231_lab.xml EX-101.LAB 957785
13 XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE nst-20111231_pre.xml EX-101.PRE 913101
Mailing Address 800 BOYLSTON STREET BOSTON MA 02199
Business Address 800 BOYLSTON ST BOSTON MA 02199 6174242000
NSTAR/MA (Filer) CIK: 0001035675 (see all company filings)

IRS No.: 043466300 | Fiscal Year End: 1231
Type: 10-K | Act: 34 | File No.: 001-14768 | Film No.: 12574095
SIC: 4911 Electric Services