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. 45972C102

1

Names of Reporting Persons
Kennerman Associates, Inc. d/b/a Kershner Grosso & Co.

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
New York

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With

5

Sole Voting Power
0

6

Shared Voting Power
0

7

Sole Dispositive Power
0

8

Shared Dispositive Power
104,006,113(1)

9

Aggregate Amount Beneficially Owned by Each Reporting Person
104,006,113(1)

10

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

11

Percent of Class Represented by Amount in Row (9)
28.5%(2)

12

Type of Reporting Person (See Instructions)
IA

CUSIP No. 45972C102

1

Names of Reporting Persons
Christopher Grosso

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
New York

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With

5

Sole Voting Power
16,221,874(1)

6

Shared Voting Power
0

7

Sole Dispositive Power
4,541,667(1)

8

Shared Dispositive Power
11,680,207

9

Aggregate Amount Beneficially Owned by Each Reporting Person
16,221,874 (1)

10

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

Excludes 87,784,239 shares of common stock and shares of common stock subject to warrants and options owned by various investment advisory clients of Kennerman Associates, Inc. d/b/a Kershner Grosso & Co.

11

Percent of Class Represented by Amount in Row (9)
4.5%(1)(2)

12

Type of Reporting Person (See Instructions)
IA

CUSIP No. 45972C102

1

Names of Reporting Persons
Thomas Kershner

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
New York

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With

5

Sole Voting Power
6,324,406(1)

6

Shared Voting Power
0

7

Sole Dispositive Power
320,834(1)

8

Shared Dispositive Power
6,003,572

9

Aggregate Amount Beneficially Owned by Each Reporting Person
6,324,406 (1)

10

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

Excludes 97,681,707 shares of common stock and shares of common stock subject to warrants and options owned by various investment advisory clients of Kennerman Associates, Inc. d/b/a Kershner Grosso & Co.

11

Percent of Class Represented by Amount in Row (9)
1.8%(1)(2)

12

Type of Reporting Person (See Instructions)
IA

Item 1.

(a)

Name of Issuer:
International Isotopes Inc.

(b)

Address of Issuer’s Principal Executive Offices:
4137 Commerce Circle, Idaho Falls, Idaho,  83401

Item 2.

(a)

Name of Person Filing:
See Item 1 of each cover page.

(b)

Address of Principal Business Office or, if none, Residence:
480 Broadway, Suite 310, Saratoga Springs, New York 12866

(c)

Citizenship:
See Item 4 of each cover page.

(d)

Title of Class of Securities:
Common Stock, $.01 par value

(e)

CUSIP Number:
45972C102

Item 3.

If this statement is filed pursuant to Rule 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)

x

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-l(b)(l)(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)

o

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

(k)

o

Group, in accordance with Rule 13d-l(b)(l)(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:____________________________

Item 4.

Ownership.

(a)

Amount beneficially owned:   

As of December 31, 2011, Kennerman Associates, Inc. d/b/a Kershner Grosso & Co. had beneficial ownership of 99,143,612 shares of common stock, $.01 par value (“Shares”) of International Isotopes, Inc. (the “Issuer”), warrants to purchase 862,501 shares of common stock that were exercisable within 60 days of December 31, 2011 (“Warrants”) and vested options to purchase 4,000,000 shares of common stock that were exercisable within 60 days of December 31, 2011 (“Options”).  Christopher Grosso is a principal of Kennerman Associates, Inc., and may be deemed to have beneficial ownership of the Shares, Warrants, and Options beneficially owned by Kennerman Associates, Inc.  Thomas Kershner is the President of Kennerman Associates, Inc., and may be deemed to have beneficial ownership of the Shares, Warrants, and Options beneficially owned by Kennerman Associates, Inc.

The filing of this report  shall not be construed  as  an admission that either Christopher Grosso or Thomas Kershner is, for  purposes of Section 13(d)  or  13(g)  of the  Act  or for  any  other  purposes,  the beneficial owner of  the Shares, Options or Warrants.  Christopher Grosso disclaims beneficial ownership of 87,784,239 Shares, Options, and Warrants covered by this Schedule 13G.  Thomas Kershner disclaims beneficial ownership of 97,681,707 Shares, Options, and Warrants covered by this Schedule 13G.

(b)

Percent of class:   

See Item 11 of each cover page.

(c)

Number of shares as to which such person has:

(i)

Sole power to vote or to direct the vote:   

See Item 5 of each cover page.

(ii)

Shared power to vote or to direct the vote:    

See Item 6 of each cover page.

(iii)

Sole power to dispose or to direct the disposition of the shares:   

See Item 7 of each cover page.

(iv)

Shared power to dispose of or to direct the disposition of:   

See Item 8 of each cover page.

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.

See Item 4(a) above.

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.

Certifications.

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, other than activities solely in connection with a nomination under Rule 14a-11.

Kennerman Associates, Inc. d/b/a Kershner Grosso & Co.

April 3, 2012

(Date)

/s/ Thomas Kershner

(Signature)

President

(Title)

Christopher Grosso

April 3, 2012

(Date)

/s/ Christopher Grosso

(Signature)

N/A

(Title)

Thomas Kershner

April 3, 2012

(Date)

/s/ Thomas Kershner

(Signature)

N/A

(Title)

ATTENTION:

Intentional misstatements or omissions of fact constitute Federal Criminal Violations (See 18 U.S.C. 1001).