UNITED STATES 
SECURITIES AND EXCHANGE COMMISSION 
Washington, D.C.  20549 
  
SCHEDULE 13G 
  
Under the Securities Exchange Act of 1934 
(Amendment No. 3)* 
  
ADURO BIOTECH INC
 
(Name of Issuer) 
 
  
 
COMMON STOCK 
 
(Title of Class of Securities) 
 

   
  
00739l101
   
(CUSIP Number) 
   
 
  
 
DECEMBER 31, 2019
 
(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).  
 

  

CUSIP No.  00739L101 
 
1  NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS 
   (ENTITIES ONLY):
  
	James R. Singer 

 
2  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (see instructions) 
    
	(a) [ ]
	(b) [ ]

 
3 SEC USE ONLY 
  
 
4 CITIZENSHIP OR PLACE OF ORGANIZATION United States of America 


 
NUMBER OF  		5  SOLE VOTING POWER 3,200,000*
SHARES 
BENEFICIALLY  		6  SHARED VOTING POWER None 
OWNED BY  
EACH REPORTING  	7  SOLE DISPOSITIVE POWER 3,200,000*
PERSON WITH: 
 			8  SHARED DISPOSITIVE POWER None 
 
 
9 	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 
  
   	3,200,000*
 

10  	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN 
    	SHARES (see instructions) 
	
	[ ]
 	 
  
11  	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 

	4.0% 

 
12  	TYPE OF REPORTING PERSON (see instructions) 

	IN 


 
 






  
Item 1(a).  	Name of Issuer:  
		
		ADURO BIOTECH INC 
 
  
 
Item 1(b).  	Address of Issuer's Principal Executive Offices: 
 
 		626 BANCROFT WAY, BERKELEY, CA 94710 
 
   
 
Item 2(a).  	Name of Person Filing: 
 
    
		The person filing this report is James R. Singer, the 
		grantor and trustee of the James R. Singer 2016
		Revocable Trust.  
 
  

Item 2(b).  	Address of Principal Business Office or, if none, Residence: 
 
   
		PO Box 1395, Yarmouth, ME 04096
 
    
 
Item 2(c).  	Citizenship: 
		
		United States of America 
 
     
 
Item 2(d).  	Title of Class of Securities:  
	
		Common Stock 
 
    
 
Item 2(e).  	CUSIP Number:  00739L101 
 


 
Item 3. 	If this Statement is filed pursuant to 240.13d-1(b) or 
		240.13d-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; 
 
		(d) [ ] Investment company registered under Section 8 of the 
			Investment Company Act of 1940; 
 
		(e) [ ] 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) [ ] A parent holding company or control person in accordance with 
			Rule 13d-1(b)(1)(ii)(G); 
 
		(h) [ ] A savings association as defined in Section 3(b) of the Federal 
			Deposit Insurance Act (12 U.S.C. 1813); 
 
		(i) [ ] A church plan that is excluded from the definition of an 
			investment company under section 3(c)(14) of the Investment 
			Company Act of 1940; 
 
		(j) [ ] A non-U.S. institution in accordance with Rule 
			240.13d-1(b)(1)(ii)(J); 
 
		(k) [ ] Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K). If filing as 
			a non-U.S. institution in accordance with Rule 
			240.13d-1(b)(1)(ii)(J), please specify the type of institution:       


  

Item 4. 	Ownership. 
		
		The information set forth in Rows 5 through 9 and 11 of the cover pages
		of this Schedule 13G is incorporated herein by reference. 
	 

 
Item 5. 	Ownership of Five Percent or Less of a 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 [X]. 
 

  
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. 
 
 	 	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 and do not have the effect of changing the control of the issuer
		of the securities and were not acquired and are not held in connection 
		with or as a participant in any transaction having such purpose or effect 
		for the time being. 
 

  
  
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. 
  
  
January 15, 2020
Date 
  
 
  
/S/James R. Singer 
Signature 
   
  
JAMES R. SINGER, TRUSTEE OF THE JAMES R. SINGER
2016 REVOCABLE TRUST
Name/Title