SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
SCHEDULE 13G
(Rule 13d-102)
INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT
TO RULES 13d-1(b),(c), AND (d) AND AMENDMENTS THERETO FILED
PURSUANT TO RULE 13d-2(b)
(Amendment No. 0)1
Teradyne, Inc.
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(Name of Issuer)
Common Stock
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(Title of Class of Securities)
880770102
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(CUSIP Number)
12/31/2004
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(Date of Event Which Requires Filing of this Statement)
Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:
[X] Rule 13d-1(b)
[_] Rule 13d-1(c)
[_] Rule 13d-1(d)
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1 The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities,
and for any subsequent amendment containing information which would alter the
disclosures provided in a prior cover page.
The information required in the remainder of this cover page shall not be
deemed to be "filed" for the purpose of Section 18 of the Securities Exchange
Act of 1934 (the "Act") or otherwise subject to the liabilities of that section
of the Act, but shall be subject to all other provisions of the Act (however,
see the Notes.)
(Continued on following pages)
Page 1 of 7 Pages
CUSIP No. 880770102 Schedule 13G Page 2 of 7 Pages
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1. NAMES OF REPORTING PERSONS
I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)
Wellington Management Company, LLP
04-2683227
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2. CHECK THE APPROPRIATE BOX IF THE MEMBER OF A GROUP*
(a) [_]
(b) [_]
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3. SEC USE ONLY
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4. CITIZENSHIP OR PLACE OF ORGANIZATION
Massachusetts
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5. SOLE VOTING POWER
NUMBER OF 0
SHARES ------------------------------------------------------------
BENEFICIALLY 6. SHARED VOTING POWER
OWNED BY 7,715,693
EACH ------------------------------------------------------------
REPORTING 7. SOLE DISPOTIVE POWER
PERSON 0
WITH ------------------------------------------------------------
8. SHARED DISPOTIVE POWER
13,846,193
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9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
13,846,193
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10. CHECK BOX IF AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
SHARES* [_]
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11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
7.130%
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12. TYPE OF REPORTING PERSON
HC,IA
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CUSIP No. 880770102 Schedule 13G Page 3 of 7 Pages
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Item 1(a). Name of Issuer:
Teradyne, Inc.
Item 1(b). Address of Issuer's Principal Executive Offices:
321 Harrison Avenue
Boston, MA 02118
Item 2(a). Name of Person Filing:
Wellington Management Company, LLP(''WMC'')
Item 2(b). Address of Principal Business Office or, if None,
Residence:
75 State St
Boston, MA 02109
Item 2(c). Citizenship:
Massachusetts
Item 2(d). Title of Class of Securities:
Common Stock
Item 2(e). CUSIP Number:
880770102
Item 3. If This Statement is Filed Pursuant to Rule 13d-1(b), or
13d-2(b) or (c), Check Whether the Person Filing is a:
(a) [ ] Broker or dealer registered under Section 15 of the Act.
(b) [ ] Bank as defined in Section 3(a)(6) of the Act.
(c) [ ] Insurance Company as defined in Section 3(a)(19) of
the Act.
CUSIP No. 880770102 Schedule 13G Page 4 of 7 Pages
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(d) [ ] Investment Company registered under Section 8 of the
Investment Company Act.
(e) [X] An investment adviser in accordance with
Rule 13d-1(b)(1)(ii)(E);
(f) [ ] An employee benefit plan or endowment fund in accordance
with Rule 13d-1(b)(1)(ii)(F);
(g) [X] A parent holding company or control person in accordance
with Rule 13d-1(b)(1)(ii)(G); see item 7;
(h) [ ] A savings association as defined in Section 3(b) of the
Federal Deposit Insurance Act;
(i) [ ] A church plan that is excluded from the definition of an
investment company under Section 3(c)(14) of the
Investment Company Act;
(j) [ ] Group, in accordance with Rule 13d-1(b)(1)(ii)(J).
If this statement is filed pursuant to Rule 13d-1(c),
check this box [ ]
Item 4. Ownership.
Provide the following information regarding the aggregate
number and percentage of the class of securities of the issuer
identified in Item 1.
(a) Amount Beneficially Owned: WMC, in its capacity as
investment adviser, may be deemed to beneficially own
13,846,193 shares of the Issuer which are held of
record by clients of WMC.
(b) Percent of Class: 7.130%
(c) Number of shares as to which such person has:
(i) sole power to vote or to direct the vote 0
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(ii) shared power to vote or to direct the
vote 7,715,693
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(iii) sole power to dispose or to direct the
disposition of 0
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(iv) shared power to dispose or to direct the
disposition of 13,846,193
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CUSIP No. 880770102 Schedule 13G Page 5 of 7 Pages
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Item 5. Ownership of Five Percent or Less of Class.
If this statement is being filed to report the fact that as of the
date hereof the reporting person has ceased to be the beneficial
owner of more than five percent of the class of securities, check
the following
[ ]
Item 6. Ownership of More than Five Percent on Behalf of Another
Person.
The securities as to which this Schedule is filed by
WMC, in its capacity as investment adviser, are
owned of record by clients of WMC. Those clients
have the right to receive, or the power to direct the receipt
of, dividends from, or the proceeds from the sale of, such
securities. No such client is known to have such right or
power with respect to more than five percent of this class of
securities, except as follows:
None
Item 7. Identification and Classification of the Subsidiary Which
Acquired the Security Being Reported on by the Parent Holding
Company.
See Exhibit A
Item 8. Identification and Classification of Members of the Group.
Not Applicable. This schedule is not being filed pursuant to
Rule 13d-1(b)(1)(ii)(J) or Rule 13d-1(d).
Item 9. Notice of Dissolution of Group.
Not Applicable
Item 10. Certification.
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(a) The following certification shall be included if the statement
is filed pursuant to Rule 13d-1(b):
"By signing below I certify that, to the best of my knowledge
and belief, the securities referred to above were acquired
and are held in the ordinary course of business and were not
acquired and are not held for the purpose of or with the
CUSIP No. 880770102 Schedule 13G Page 6 of 7 Pages
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effect of changing or influencing the control of the issuer of
the securities and were not acquired and are not held in
connection withor as a participant in any transaction
having that purpose or effect. "
SIGNATURE
After reasonable inquiry and to the best of my knowledge and belief,
I certify that the information set forth in this statement is true,
complete and correct.
By: --//Julie A. Jenkins//--
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Name: Julie A. Jenkins
Title: Vice President
Date: February 14, 2005
**Signed pursuant to a Power of Attorney dated March 3, 2004 and filed with the
SEC on March 10, 2004.
CUSIP No. 880770102 Schedule 13G Page 7 of 7 Pages
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Exhibit A
Pursuant to the instructions in Item 7 of this Schedule 13G, the
identity and the Item 3 classification of the relevant subsidiary
are: Wellington Trust Company, NA, 75 State Street, Boston MA 02109,
a wholly-owned subsidiary of Wellington Management Company, LLP and a
bank as defined in Section 3(a)(6) of the Securities Exchange Act of 1934.