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)

CUSIP No. 253798102

1

Name of Reporting Persons
EdgePoint Investment Group Inc.

2

Check the Appropriate Box if a Member of a Group (See Instructions)

(a)

o

(b)

o

3

SEC Use Only

4

Citizenship or Place of Organization
Ontario

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With:

5

Sole Voting Power
0

6

Shared Voting Power
2,602,978

7

Sole Dispositive Power
0

8

Shared Dispositive Power
2,602,978

9

Aggregate Amount Beneficially Owned by Each Reporting Person
2,602,978

10

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

11

Percent of Class Represented by Amount in Row (9)
10.0%1

12

Type of Reporting Person (See Instructions)
FI

CUSIP No. 253798102

1

Name of Reporting Persons
Cymbria Corporation

2

Check the Appropriate Box if a Member of a Group (See Instructions)

(a)

o

(b)

o

3

SEC Use Only

4

Citizenship or Place of Organization
Ontario

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With:

5

Sole Voting Power
0

6

Shared Voting Power
420,100

7

Sole Dispositive Power
0

8

Shared Dispositive Power
420,100

9

Aggregate Amount Beneficially Owned by Each Reporting Person
420,100

10

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

11

Percent of Class Represented by Amount in Row (9)
1.6%

12

Type of Reporting Person (See Instructions)
FI

CUSIP No. 253798102

1

Name of Reporting Persons
EdgePoint Global Growth & Income Portfolio

2

Check the Appropriate Box if a Member of a Group (See Instructions)

(a)

o

(b)

o

3

SEC Use Only

4

Citizenship or Place of Organization
Ontario

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With:

5

Sole Voting Power
0

6

Shared Voting Power
597,700

7

Sole Dispositive Power
0

8

Shared Dispositive Power
597,700

9

Aggregate Amount Beneficially Owned by Each Reporting Person
597,700

10

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

11

Percent of Class Represented by Amount in Row (9)
2.3%

12

Type of Reporting Person (See Instructions)
FI

CUSIP No. 253798102

1

Name of Reporting Persons
EdgePoint Global Portfolio

2

Check the Appropriate Box if a Member of a Group (See Instructions)

(a)

o

(b)

o

3

SEC Use Only

4

Citizenship or Place of Organization
Ontario

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With:

5

Sole Voting Power
0

6

Shared Voting Power
1,361,100

7

Sole Dispositive Power
0

8

Shared Dispositive Power
1,361,100

9

Aggregate Amount Beneficially Owned by Each Reporting Person
1,361,100

10

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

11

Percent of Class Represented by Amount in Row (9)
5.2%

12

Type of Reporting Person (See Instructions)
FI

CUSIP No. 253798102

1

Name of Reporting Persons
St. James’s Place Global Equity Unit Trust

2

Check the Appropriate Box if a Member of a Group (See Instructions)

(a)

o

(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
224,078

7

Sole Dispositive Power
0

8

Shared Dispositive Power
224,078

9

Aggregate Amount Beneficially Owned by Each Reporting Person
224,078

10

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

11

Percent of Class Represented by Amount in Row (9)
0.9%

12

Type of Reporting Person (See Instructions)
FI

CUSIP No. 253798102

Item 1.

(a)

Name of Issuer:
DIGI International, Inc.

(b)

Address of Issuer’s Principal Executive Offices:
11001 Bren Road East, Minnetonka,  MN 55343

Item 2.

(a)

Name of Person Filing:
The persons filing this Schedule 13G are (i) EdgePoint Investment Group Inc. (“EIG”), an advisor/portfolio manager (investment fund manager) registered with the Ontario Securities Commission; (ii) Cymbria Corporation (“Cymbria”), a closed end fund corporation; (iii) EdgePoint Global Growth & Income Portfolio (“EPG G&I”), a mutual fund trust; (iv) EdgePoint Global Portfolio (“EPG”), a mutual fund trust; and (v) St James’s Place Global Equity Unit Trust (“SJPGEUT” and together with Cymbria,  EPG G&I, and EPG, the “Funds”), a unit trust collective investment scheme. EIG is the advisor/portfolio manager to each of the Funds.  EIG and each of the Funds are party to an investment management agreement pursuant to which all voting and dispositive power over securities held by each Fund is delegated to EIG. The investment management agreement can be terminated by any party on 60 days’ prior notice with the exception of SJPGEUT where 90 days’ prior notice is required by EIG and no notice by is required by SJPGEUT. Attached as Exhibit 1 hereto, which is incorporated by reference herein, is an agreement between EIG and the Funds that this Schedule 13G is filed on behalf of each of them.

(b)

Address of Principal Business Office or, if none, Residence:
150 Bloor Street West, Suite 500, Toronto, Ontario M5S 2X9, Canada

(c)

Citizenship:

EIG is a corporation organized under the laws of Ontario

Cymbria is a corporation organized under the laws of Ontario

EPG G&I is a mutual fund trust established under the laws of Ontario

EPG is a mutual fund trust established under the laws of Ontario

SJPGEUT is a unit trust collective investment scheme established under the laws of the United Kingdom

(d)

Title of Class of Securities:
Common Stock

(e)

CUSIP Number:
253798102

Item 3.

If this statement is filed pursuant to Rules 13d-1(b), or 13d-2(b) or (c), check whether the person filing is a:

(a)

o

Broker or dealer registered under section 15 of the Exchange Act;

(b)

o

Bank as defined in section 3(a)(6) of the Exchange Act;

(c)

o

Insurance company as defined in section 3(a)(19) of the Exchange Act;

(d)

o

Investment company registered under section 8 of the Investment Company Act;

(e)

o

An investment adviser in accordance with Rule 13d-1(b)(1)(ii)(E);

(f)

o

An employee benefit plan or endowment fund in accordance with Rule 13d-1(b)(1)(ii)(F);

(g)

o

A parent holding company or control person in accordance with Rule 13d-1(b)(1)(ii)(G);

(h)

o

A savings association as defined in Section 3(b) of the Federal Deposit Insurance Act;

(i)

o

A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act;

(j)

x

A non-U.S. institution in accordance with Rule 13d-1(b)(1)(ii)(J);

(k)

o

Group, in accordance with Rule 13d-1(b)(1)(ii)(K).

If filing as a non-U.S. institution in accordance with Rule 13d-1(b)(1)(ii)(J), please specify the type of institution:

EIG is comparable to an IA and each of the Funds is comparable to an IV.

CUSIP No. 253798102

Item 4.

Ownership.

EIG

(a)

Amount beneficially owned:   

2,602,978

(b)

Percent of class:   

10%

(c)

Number of shares as to which the person has:

(i)

Sole power to vote or to direct the vote   

0

(ii)

Shared power to vote or to direct the vote:    

2,602,978

(iii)

Sole power to dispose or to direct the disposition of:   

0

(iv)

Shared power to dispose or to direct the disposition of:

2,602,978

Cymbria

(a)

Amount beneficially owned:   

420,100

(b)

Percent of class:   

1.6%

(c)

Number of shares as to which the person has:

(i)

Sole power to vote or to direct the vote   

0

(ii)

Shared power to vote or to direct the vote:    

420,100

(iii)

Sole power to dispose or to direct the disposition of:   

0

(iv)

Shared power to dispose or to direct the disposition of:

420,100

EPG G&I

(a)

Amount beneficially owned:   

597,700

(b)

Percent of class:   

2.3%

(c)

Number of shares as to which the person has:

(i)

Sole power to vote or to direct the vote   

0

(ii)

Shared power to vote or to direct the vote:    

597,700

(iii)

Sole power to dispose or to direct the disposition of:   

0

CUSIP No. 253798102

(iv)

Shared power to dispose or to direct the disposition of:

597,700

EPG

(a)

Amount beneficially owned:   

1,361,100

(b)

Percent of class:   

5.2%

(c)

Number of shares as to which the person has:

(i)

Sole power to vote or to direct the vote   

0

(ii)

Shared power to vote or to direct the vote:    

1,361,100

(iii)

Sole power to dispose or to direct the disposition of:   

0

(iv)

Shared power to dispose or to direct the disposition of:

1,361,100

SJPGEUT

(a)

Amount beneficially owned:   

224,078

(b)

Percent of class:   

0.9%

(c)

Number of shares as to which the person has:

(i)

Sole power to vote or to direct the vote   

0

(ii)

Shared power to vote or to direct the vote:    

224,078

(iii)

Sole power to dispose or to direct the disposition of:   

0

(iv)

Shared power to dispose or to direct the disposition of:

224,078

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.

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

Not Applicable

Item 9.

Notice of Dissolution of Group

Not Applicable

CUSIP No. 253798102

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 or with the effect of changing or influencing 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 that purpose or effect.

By signing below I also certify that, to the best of my knowledge and belief, the foreign regulatory scheme applicable to investment advisers and investment companies is substantially comparable to the regulatory scheme applicable to the functionally equivalent U.S. institution(s). I also undertake to furnish to the Commission staff, upon request, information that would otherwise be disclosed in a Schedule 13D.

April 9, 2013

Date

/s/ Patrick Farmer

Patrick Farmer/Chief Compliance Officer