<PAGE>
-------------------------------
/ OMB APPROVAL /
-------------------------------
/ OMB Number: 3235-0145 /
/ Expires: November 30, 1999 /
/ Estimated average burden /
/ hours per response....14.90 /
-------------------------------
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
Under the Securities Exchange Act of 1934
(Amendment No. 11 )*
----
American Power Conversion Corporation
- --------------------------------------------------------------------------------
(Name of Issuer)
Common Stock, $.01 par value per share
- --------------------------------------------------------------------------------
(Title of Class of Securities)
029066 10 7
------------------------------
(CUSIP Number)
12/31/99
- --------------------------------------------------------------------------------
(Date of Event Which Requires Filing of this Statement)
Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:
[_] Rule 13d-1(b)
[X] Rule 13d-1(c)
[_] Rule 13d-1(d)
*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 ("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).
<PAGE>
CUSIP NO. 029066 10 7 13G PAGE 2 OF 5
----------- -----------
- ------------------------------------------------------------------------------
NAMES OF REPORTING PERSONS.
1 I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY).
Neil E. Rasmussen
###-##-####
- ------------------------------------------------------------------------------
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)
2 (a) [_]
(b) [_]
- ------------------------------------------------------------------------------
SEC USE ONLY
3
- ------------------------------------------------------------------------------
CITIZENSHIP OR PLACE OF ORGANIZATION
4
United States
- ------------------------------------------------------------------------------
SOLE VOTING POWER
5
NUMBER OF 9,401,744
SHARES -----------------------------------------------------------
SHARED VOTING POWER
BENEFICIALLY 6
160,424
OWNED BY
-----------------------------------------------------------
EACH SOLE DISPOSITIVE POWER
7
REPORTING 8,794,220
PERSON -----------------------------------------------------------
SHARED DISPOSITIVE POWER
WITH 8
767,948
- ------------------------------------------------------------------------------
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
9
9,562,168
- ------------------------------------------------------------------------------
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
10 (SEE INSTRUCTIONS)
[X]
See Item 4
- ------------------------------------------------------------------------------
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
11
4.96%
- ------------------------------------------------------------------------------
TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
12
IN
- ------------------------------------------------------------------------------
<PAGE>
Item 1(a). Name of Issuer: American Power Conversion Corporation.
--------------
Item 1(b). Address of Issuer's Principal Executive Offices:
-----------------------------------------------
P.O. Box 278, 132 Fairgrounds Road, West Kingston,
Rhode Island 02892.
Item 2(a). Name of Person Filing: Neil E. Rasmussen
---------------------
Item 2(b). Address of Principal Business Office or, if None, Residence:
-----------------------------------------------------------
The address of the principal business office of Mr. Rasmussen is:
755 Middlesex Turnpike, Billerica, MA 01821.
Item 2(c). Citizenship: Mr. Rasmussen is a United States citizen.
-----------
Item 2(d). Title of Class of Securities: Common Stock, $.01 par value per
----------------------------
share.
Item 2(e). CUSIP Number: 029066-10-7
-------------
Item 3. If this statement is filed pursuant to Rule 13d-1(b), or 13d-2(b),
check whether the person filing is a:
(a) [ ] Broker or Dealer registered under Section 15 of the
Securities Exchange Act of 1934 (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.
(d) [ ] Investment Company registered under Section 8 of the
Investment Company Act of 1940.
(e) [ ] Investment Advisor registered under Section 203 of the
Investment Advisers Act of 1940.
(f) [ ] Employee Benefit Plan, Pension Fund which is subject to
the provisions of the Employee Retirement Income
Security Act of 1974 or Endowment Fund; see Rule
13d-1(b)(1)(ii)(F) of the Act .
(g) [ ] Parent Holding Company, in accordance with Rule
13d-1(b)(ii)(G) of the Act.
(h) [ ] Group, in accordance with Rule 13d-1(b)(1)(ii)(H) of the
Act.
Not Applicable.
Item 4. Ownership.
---------
(a) Mr. Rasmussen may be deemed to own beneficially 9,562,168 shares
of Common Stock as of December 31, 1999. Such shares include
607,524 shares currently allocated to him under the Company's
Employee Stock Ownership Plan ("ESOP"). In addition, Mr.
Rasmussen is a co-trustee of the ESOP, and as such may be deemed
to be the beneficial owner of the 8,824,654 shares currently
held by the ESOP. Mr. Rasmussen disclaims beneficial ownership
of those 8,824,654 shares other than the 607,524 shares
allocated to him. The 9,562,168 shares which Mr. Rasmussen may
be deemed to beneficially own also includes 160,424 shares owned
by the
<PAGE>
Neil and Anna Rasmussen Foundation of which Mr. Rasmussen is a
co-trustee. Mr. Rasmussen disclaims beneficial ownership of those
160,424 shares held by such trust.
(b) Percent of Class: 4.96% (based on the 192,595,000 shares of
Common Stock reported to be outstanding on November 4, 1999 in
the Quarterly Report on Form 10-Q of American Power Conversion
Corporation for the quarter ended September 26, 1999).
(c) Number of shares as to which such person has:
(i) sole power to vote or to direct the vote: 9,401,744 shares
(ii) shared power to vote or to direct the vote: 160,424 shares
(iii) sole power to dispose or direct the disposition of:
8,794,220 shares
(iv) shared power to dispose or to direct the disposition of:
767,948 shares
* Information as to ESOP numbers contained herein do not reflect final
adjustments or allocations for fiscal year ended December 31, 1999.
Item 5. Ownership of Five Percent or Less of a Class.
--------------------------------------------
Not Applicable.
Item 6. Ownership of More than Five Percent on Behalf of Another Person.
---------------------------------------------------------------
Not Applicable.
Item 7. Identification and Classification of the Subsidiary which Acquired the
Security Being Reported on by the Parent Holding Company.
Not Applicable.
Item 8. Identification and Classification of Members of the Group.
---------------------------------------------------------
Not applicable.
Item 9. Notice of Dissolution of Group.
------------------------------
Not Applicable.
Item 10. Certification.
-------------
Not Applicable. This statement on Schedule 13G is not filed pursuant
to Rule 13d-1(b).
<PAGE>
SIGNATURES
----------
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.
Date: February 14, 2000
/s/ Neil E. Rasmussen
----------------------------
Neil E. Rasmussen
