Ptc Therapeutics Inc. (PTCT): Camber Capital Management Adds 500,000 Shares to Its Position

Page 3 of 6 – SEC Filing

13G

CUSIP No.
69366J200

Page 3 of
6

1. Names of Reporting Persons. Stephen DuBois Not applicable
2. Check the Appropriate Box if a Member of a Group (a) ☐ (b) ☐
3. SEC Use Only
4. Citizenship or Place of Organization Stephen DuBois – United States
Number of Shares    Beneficially    Owned by    Each Reporting    Person With:	5. Sole Voting Power 0 shares
	6. Shared Voting Power 2,000,000 shares
	7. Sole Dispositive Power 0 shares
	8. Shared Dispositive Power 2,000,000 shares
9. Aggregate Amount Beneficially Owned by Each Reporting Person Stephen DuBois – 2,000,000 shares
10. Check if the Aggregate Amount in Row (9) Excludes Certain Shares       ☐
11. Percent of Class Represented by Amount in Row (9) Stephen DuBois – 5.84%
12. Type of Reporting Person Stephen DuBois – IN