Filing Details

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

x

Rule 13d-1(b)

o

Rule 13d-1(c)

o

Rule 13d-1(d)

1

Name of Reporting Person
Senrigan Capital Group Limited

2

Check the Appropriate Box if a Member of a Group

(a)

x

(b)

o

3

SEC Use Only

4

Citizenship or Place of Organization
Hong Kong

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With

5

Sole Voting Power
- 0 -

6

Shared Voting Power
12,689,105

7

Sole Dispositive Power
- 0 -

8

Shared Dispositive Power
12,689,105

9

Aggregate Amount Beneficially Owned by Each Reporting Person
12,689,105

10

Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares   o

11

Percent of Class Represented by Amount in Row (9)
5.3

12

Type of Reporting Person
CO

1

Name of Reporting Person
Senrigan Capital Management Limited

2

Check the Appropriate Box if a Member of a Group

(a)

x

(b)

o

3

SEC Use Only

4

Citizenship or Place of Organization
Cayman Islands

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With

5

Sole Voting Power
- 0 -

6

Shared Voting Power
12,689,105

7

Sole Dispositive Power
- 0 -

8

Shared Dispositive Power
12,689,105

9

Aggregate Amount Beneficially Owned by Each Reporting Person
12,689,105

10

Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares   o

11

Percent of Class Represented by Amount in Row (9)
5.3

12

Type of Reporting Person
CO

1

Name of Reporting Person
Senrigan Master Fund

2

Check the Appropriate Box if a Member of a Group

(a)

x

(b)

o

3

SEC Use Only

4

Citizenship or Place of Organization
Cayman Islands

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With

5

Sole Voting Power
- 0 -

6

Shared Voting Power
12,689,105

7

Sole Dispositive Power
- 0 -

8

Shared Dispositive Power
12,689,105

9

Aggregate Amount Beneficially Owned by Each Reporting Person
12,689,105

10

Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares   o

11

Percent of Class Represented by Amount in Row (9)
5.3

12

Type of Reporting Person
CO

1

Name of Reporting Person
Nick Taylor

2

Check the Appropriate Box if a Member of a Group

(a)

x

(b)

o

3

SEC Use Only

4

Citizenship or Place of Organization
United Kingdom

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With

5

Sole Voting Power
- 0 -

6

Shared Voting Power
12,689,105

7

Sole Dispositive Power
- 0 -

8

Shared Dispositive Power
12,689,105

9

Aggregate Amount Beneficially Owned by Each Reporting Person
12,689,105

10

Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares   o

11

Percent of Class Represented by Amount in Row (9)
5.3

12

Type of Reporting Person
IN

Item 1(a).

Name of Issuer:
JA Solar Holdings Co., Ltd.

Item 1(b).

Address of Issuers Principal Executive Offices:
JA Solar Holdings Co., Ltd.

Building No. 8, Noble Center, Automobile Museum

East Road,

Fengtai, Beijing 100070

People's Republic of China

Item 2(a).

Name of Person Filing:
This statement is filed by Senrigan Capital Group Limited, a Hong Kong private company (Senrigan Capital), Senrigan Capital Management Limited (SCM), Senrigan Master Fund (Master Fund), Lamma Fund, Lantau Fund, and Nick Taylor, each with respect to the Issuers ordinary shares, as represented by American depository shares (Shares) directly owned by the Master Fund.  Each of the foregoing is referred to as a Reporting Person and collectively as the Reporting Persons.

Nick Taylor is the majority owner of SCM.  By virtue of this relationship, Mr. Taylor may be deemed to beneficially own the Shares owned directly by the Master Fund.

Item 2(b).

Address of Principal Business Office or, if none, Residence:
The principal business address of each of Senrigan Capital and Mr. Taylor is 11th Floor, LHT Tower, 31-31A Queens Road Central, Central, Hong Kong.

The principal business address of SCM and the Master Fund are PO Box 309, Ugland House, Grand Cayman, KY-1104, Cayman Islands.

The principal business address for Lamma Fund and Lantau Fund are Cayman Corporate Centre, 27 Hospital Road, George Town, Grand Cayman KY1-9008, Cayman Islands.

Item 2(c).

Citizenship:
Senrigan Capital is organized under the laws of Hong Kong.  The Master Fund, Lamma Fund and Lantau Fund are organized under the laws of the Cayman Islands.  Mr. Taylor is a citizen of the United Kingdom.

Item 2(d).

Title of Class of Securities:
Ordinary shares (as represented by American depository shares), US $0.0001 par value per share.  All percentages referenced in this SCH 13G reference the 237,923,600 issued and outstanding ordinary shares, including shares underlying American depository shares, as disclosed by the Company in its most recent Form 6-K.

Item 2(e).

CUSIP Number:
466090206

Item 3.

If this statement is filed pursuant to Section 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:

o

Not Applicable

(a)

o

Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o).

(b)

o

Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c).

(c)

o

Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c).

(d)

o

Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8).

(e)

o

Investment adviser in accordance with Section 240.13d-1(b)(1)(ii)(E).

(f)

o

Employee benefit plan or endowment fund in accordance with Section 240.13d-1(b)(1)(ii)(F).

(g)

o

Parent holding company or control person in accordance with Section 240.13d-1(b)(1)(ii)(G).

(h)

o

Savings association as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813).

(i)

o

Church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act (15 U.S.C. 80a-3).

(j)

x

Non-U.S. institution in accordance with Section 240.13d-1(b)(1)(ii)(J).

(k)

o

Group, in accordance with Section 240.13d-1(b)(1)(ii)(J).

Item 4.

Ownership.

All ownership information reported in this Item 4 is as of the close of business on December 31, 2017.

Senrigan Capital

(a)

Amount beneficially owned:   

12,689,105  Shares*

(b)

Percent of class:   

5.3

(c)

Number of shares as to which such person has:

(i)

Sole power to vote or to direct the vote   

0 Shares

(ii)

Shared power to vote or to direct the vote    

12,689,105 Shares*

(iii)

Sole power to dispose or to direct the disposition of   

0 Shares

(iv)

Shared power to dispose or to direct the disposition of   

12,689,105 Shares*

SCM

(a)

Amount beneficially owned:   

12,689,105  Shares*

(b)

Percent of class:   

5.3

(c)

Number of shares as to which such person has:

(i)

Sole power to vote or to direct the vote   

0 Shares

(ii)

Shared power to vote or to direct the vote    

12,689,105 Shares*

(iii)

Sole power to dispose or to direct the disposition of   

0 Shares

(iv)

Shared power to dispose or to direct the disposition of   

12,689,105 Shares*

Master Fund

(a)

Amount beneficially owned:   

12,689,105  Shares

(b)

Percent of class:   

5.3

(c)

Number of shares as to which such person has:

(i)

Sole power to vote or to direct the vote   

0 Shares

(ii)

Shared power to vote or to direct the vote    

12,689,105 Shares

(iii)

Sole power to dispose or to direct the disposition of   

0 Shares

(iv)

Shared power to dispose or to direct the disposition of   

12,689,105 Shares

Mr. Taylor

(a)

Amount beneficially owned:   

12,689,105  Shares*

(b)

Percent of class:   

5.3

(c)

Number of shares as to which such person has:

(i)

Sole power to vote or to direct the vote   

0 Shares

(ii)

Shared power to vote or to direct the vote    

12,689,105 Shares*

(iii)

Sole power to dispose or to direct the disposition of   

0 Shares

(iv)

Shared power to dispose or to direct the disposition of   

12,689,105 Shares*

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   o.

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 or Control Person.

Not Applicable.

Item 8.

Identification and Classification of Members of the Group.

See Exhibit 99.1.

Item 9.

Notice of Dissolution of Group.

Not Applicable.

Dated: January 1, 2018

Senrigan Capital Group Limited

By:

/s/ Chris Nash

Name:

Chris Nash

Title:

Chief Operating Officer

Senrigan Master Fund

/s/ Nick Taylor

By: Nick Taylor 

Director

Senrigan Capital Management Limited

/s/ Nick Taylor

Nick Taylor

Director

/s/ Nick Taylor

Nick Taylor