4/A 1 0001.txt UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 4 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP [ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. 1. Name and Address of Reporting Person(s) Venkatadri, Bobba 10030 Barnes Canyon Road San Diego, CA 92121-2789 2. Issuer Name and Ticker or Trading Symbol Molecular Biosystems, Inc. (MB) 3. I.R.S. Identification Number of Reporting Person, if an entity (Voluntary) 4. Statement for Month/Year 05/00 5. If Amendment, Date of Original (Month/Year) 06/09/00 6. Relationship of Reporting Person(s) to Issuer (Check all applicable) [X] Director [ ] 10% Owner [X] Officer (give title below) [ ] Other (specify below) President and CEO 7. Individual or Joint/Group Filing (Check Applicable Line) [X] Form filed by One Reporting Person [ ] Form filed by More than One Reporting Person
Table I Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned ------------------------------------------------------------------------------------------------------------------------------------ 1)Title of Security 2)Trans- 3.Trans- 4.Securities Acquired(A) 5)Amount of 6) 7)Nature of action action or Disposed of (D) Securities Indirect Date Code A Beneficially D Beneficial (Month/ or Owned at or Ownership Day/Year) Code V Amount D Price End of Month I ------------------------------------------------------------------------------------------------------------------------------------ Common Stock 05/09/00 J 23,931 (1) D 57,772 D Direct Table II (PART 1) Derivative Securities Acquired, Disposed of, or Beneficially Owned (Columns 1 through 6) ------------------------------------------------------------------------------------------------------------------------------------ 1)Title of Derivative 2)Conversion 3)Trans- 4)Trans- 5)Number of Derivative 6)Date Exercisable and Security or Exercise action action Securities Acquired (A) Expiration Date Price of Date Code or Disposed of (D) Derivative Security Code V A D Exercisable Expiration ------------------------------------------------------------------------------------------------------------------------------------ Incentive Stock Option (right $0.7188 05/24/00 A 150,000 (2) 05/24/01 05/24/10 to buy) Table II (PART 2) Derivative Securities Acquired, Disposed of, or Beneficially Owned (Columns 1,3 and 7 through 11) ------------------------------------------------------------------------------------------------------------------------------------ 1)Title of Derivative 3)Trans- 7)Title and Amount 8)Price 9)Number of 10) 11)Nature of Security action of Underlying of Deri- Derivative Indirect Date Securities vative Securities D Beneficial Amount or Security Beneficially or Ownership Number of Owned at I - Title Shares End of Month ------------------------------------------------------------------------------------------------------------------------------------ Incentive Stock Option (right 05/24/00 Common Stock 150,000 150,000 D Direct to buy) Explanation of Responses: (1) Cancellation of shares in satisfaction of tax liability. (2) Option grants vest 25% per year over four years.
SIGNATURE OF REPORTING PERSON /S/ By: Kevin Helmbacher For: Bobba Venkatadri DATE