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OMB APPROVAL
OMB Number 3235-0145
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SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
Under the Securities Exchange Act of 1934
(Amendment No. )*
Pinnacle Systems, Inc.
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(Name of Issuer)
Common Stock
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(Title of Class of Securities)
723481107
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(CUSIP Number)
*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 1 of 6 pages
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CUSIP NO. 723481107 13G Page 2 of 6 Pages
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1 NAME(S) OF REPORTING PERSON(S)
S.S. OR I.R.S. IDENTIFICATION NO(S). OF ABOVE PERSON(S)
Granahan Investment Management, Inc. 04-2856200
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2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) / /
Not Applicable.
(b) / /
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3 SEC USE ONLY
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4 CITIZENSHIP OR PLACE OF ORGANIZATION
Commonwealth of Massachusetts
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NUMBER OF 5 SOLE VOTING POWER
SHARES 13,000
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BENEFICIALLY 6 SHARED VOTING POWER
OWNED BY -0-
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EACH 7 SOLE DISPOSITIVE POWER
REPORTING 413,500
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PERSON 8 SHARED DISPOSITIVE POWER
WITH -0-
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9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
413,500
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10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
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11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
5.59%
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12 TYPE OF REPORTING PERSON*
IA
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*SEE INSTRUCTION BEFORE FILLING OUT!
Page 2 of 6 pages
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Item 1(a) Name of Issuer
Pinnacle Systems, Inc.
Item 1(b) Address of Issuer's Principal Executive Offices
280 N. Bernardo Avenue
Mountain View, CA 94043
Item 2(a) Name of Person Filing
Granahan Investment Management, Inc.
Item 2(b) Address of Principal Business Office or, if none, Residence
275 Wyman Street, Suite 270
Waltham, MA 02154
Item 2(c) State of Organization/Citizenship
Commonwealth of Massachusetts
Item 2(d) Title of Class of Securities
` Common Stock
Item 2(e) CUSIP Number
723481107
Item 3. If this statement is filed pursuant to Rules 13d-1(b), or
13d-2(b), 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
(d) [ ] Investment Company registered under Section 8 of the
Investment Company Act
Page 3 of 6 pages
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(e) [X] Investment Adviser 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 section 240.13d-1(b)(1)(ii)(F)
(g) [ ] Parent Holding Company, in accordance with
section 240.13d-1(b)(1)(ii)(G)
(h) [ ] Group, in accordance with section 240.13d-1(b)(1)(ii)(H)
Item 4. Ownership
(a) Amount Beneficially Owned: 413,500
(b) Percent of Class: 5.59%
(c) Number of shares as to which such person has:
(i) sole power to vote or to direct the vote: 13,000
(ii) shared power to vote or to direct the vote: -0-
(iii) sole power to dispose or to direct the disposition of:
413,500
(iv) shared power to dispose or to direct the disposition of:
-0-
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
Certain other persons have the right to receive or the power
to direct the receipt of dividends from, or the proceeds from the
sale of, the class of securities which are subject to this
report. Vanguard Explorer Fund, Inc.'s such rights relate to
more than five percent of the class.
Item 7. Identification and Classification of the Subsidiary Which
Acquired the Security Being Reported on By the Parent Holding
Company
Page 4 of 6 pages
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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
By signing below I certify that, to the best of my knowledge and
belief, the securities referred to above were acquired in the ordinary
course of business and were not acquired for the purpose of and do not
have the effect of changing or influencing the control of the issuer
of such securities and were not acquired in connection with or as a
participant in any transaction having such purposes or effect.
Page 5 of 6 pages
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Signature
After reasonably 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.
GRANAHAN INVESTMENT MANAGEMENT, INC.
Date: January 27, 1998 By: /s/ John J. Granahan
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John J. Granahan, President
Page 6 of 6 pages
