SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C.  20549

SCHEDULE 13D

(RULE 13D - 101)

INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO 13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO 13d-2(a)

(Amendment No. 4)*

(Name of Issuer)

(Title of Class of Securities)

(CUSIP Number)

Stone House Capital Management, LLC

Attn: Mark Cohen

950 Third Avenue, 17th Floor

New York, NY 10022

(212) 543-1500

with a copy to:

Christopher P. Davis, Esq.

Kleinberg, Kaplan, Wolff & Cohen, P.C.

551 Fifth Avenue, New York, New York 10176

 (Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)

(Date of Event which Requires Filing of this Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition which is the subject of this Schedule 13D, and is filing this schedule because of Rule 13d-1(e), 13d-1(f) or 13d-1(g), check the following box [ ].

Note:  Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits.  See Rule 13d-7 for other parties to whom copies are to be sent.

*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 disclosures provided in a prior cover page.

The information required on 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 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).

The following constitutes Amendment No. 4 to the Schedule 13D filed by the undersigned ("Amendment No. 4").  This Amendment No. 4 amends the Schedule 13D as specifically set forth herein.

Item 4.

Purpose of Transaction.

Item 4 is hereby amended to add the following:

On February 26, 2016, Partners delivered a letter (the "Nomination Letter") to the Issuer nominating Kyle Altshuler, Mark Cohen and David Fink (the "Nominees") for election to the Board of Directors of the Issuer (the "Board") at the Issuer's 2016 annual meeting of stockholders (the "Annual Meeting").

The Reporting Persons continue to think highly of Steven Scheinkman, President and Chief Executive Officer of the Issuer, and Mr. Scheinkman's management team.  The Reporting Persons have nominated the Nominees based on their belief that changes are still needed to the Board in order to maximize stockholder value.  The Reporting Persons believe that the Nominees possess experiences and expertise that will allow them to serve as valuable additions to the Board.

Item 6.

Contracts, Arrangements, Understandings or Relationships With Respect to Securities of the Issuer.

Item 6 is hereby amended to add the following:

Stone House entered into a letter agreement (the "Indemnification Letter Agreement") pursuant to which Stone House has agreed to indemnify David Fink against claims arising from the solicitation of proxies from the Issuer's stockholders in connection with the Annual Meeting and any related transactions.  The Indemnification Letter Agreement is attached hereto as Exhibit 99.1 and is incorporated herein by reference.

Item 7.

Material to be Filed as Exhibits

Item 7 is hereby amended to add the following:

99.1

Indemnification Letter Agreement

SIGNATURES

After reasonable inquiry and to the best of its knowledge and belief, each of the undersigned certifies that the information with respect to it set forth in this statement is true, complete, and correct.

Dated:

March 1, 2016

                                                            MARK COHEN

Exhibit 99.1

STONE HOUSE CAPITAL MANAGEMENT, LLC
950 Third Avenue, 17th Floor
New York, NY 10022

February 25, 2016

Re:

A.M. Castle & Co.

Dear David Fink:

Thank you for agreeing to serve as a nominee for election to the Board of Directors of A.M. Castle & Co. (the "Company") in connection with the proxy solicitation being considered by Stone House Capital Management, LLC ("Stone House") and its affiliates to nominate and elect directors at the Company's 2016 annual meeting of stockholders, or any other meeting of stockholders held in lieu thereof and any adjournments, postponements, reschedulings or continuations thereof (the "Solicitation"). Your outstanding qualifications, we believe, will prove a valuable asset to the Company and all of its stockholders. This letter ("Agreement") will set forth the terms of our agreement.

Stone House  agrees to indemnify and hold you harmless against any and all claims of any nature arising from the Solicitation and any related transactions whenever brought and irrespective of the outcome; provided, however, that you will not be entitled to indemnification for claims arising from your gross negligence, willful misconduct, intentional and material violations of law, criminal actions, provision to Stone House of false or misleading information (including false or misleading information included in (i) any questionnaire you are requested to complete by Stone House, (ii) any resume provided by you to Stone House or (iii) your LinkedIn profile, if available), or material breach of the terms of this Agreement; provided further, that upon your becoming a director of the Company, this indemnification shall not apply to any claims made against you in your capacity as a director of the Company. This indemnification will include any and all losses, liabilities, damages, demands, claims, suits, actions, judgments, or causes of action, assessments, costs and expenses, including, without limitation, interest, penalties, reasonable attorneys' fees, and any and all reasonable costs and expenses incurred in investigating, preparing for or defending against any litigation, commenced or threatened, any civil, criminal, administrative or arbitration action, or any claim whatsoever, and any and all amounts paid in settlement of any claim or litigation asserted against, resulting, imposed upon, or incurred or suffered by you, directly or indirectly, as a result of or arising from the Solicitation and any related transactions (each, a "Loss").

In the event of a claim against you pursuant to the prior paragraph or the occurrence of a Loss, you shall give Stone House prompt written notice of such claim or Loss (provided that failure to promptly notify Stone House shall not relieve it from any liability which it may have on account of this Agreement, except to the extent Stone House shall have been prejudiced by such failure). Upon receipt of such written notice, Stone House will provide you with counsel to represent you.  Such counsel shall be reasonably acceptable to you. In addition, you will be reimbursed promptly for all Losses suffered by you and as incurred as provided herein. Stone House may not enter into any settlement of Loss or claim without your consent unless such settlement includes a general release in your favor. Notwithstanding anything to the contrary set forth in this Agreement, Stone House shall not be responsible for any fees, costs or expenses, including for separate legal counsel, incurred by you without Stone House's prior written approval.  In addition, you agree not to enter into any settlement of Loss or claim or make any admission without the written consent of Stone House.

You hereby agree to keep confidential and not disclose to any party, without the consent of Stone House, any confidential, proprietary or non-public information (collectively, "Information") of Stone House or its affiliates which you have heretofore obtained or may obtain. Notwithstanding the foregoing, Information shall not include any information that is publicly disclosed by Stone House or its affiliates or any information that you can demonstrate is now, or hereafter becomes, through no act or failure to act on your part, otherwise generally known to the public.

Notwithstanding the foregoing, if you are required by applicable law, rule, regulation or legal process to disclose any Information you may do so provided that you first promptly notify Stone House so that Stone House may seek a protective order or other appropriate remedy or, in Stone House's sole discretion, waive compliance with the terms of this Agreement. In the event that no such protective order or other remedy is obtained or Stone House does not waive compliance with the terms of this Agreement, you may consult with counsel at the cost of Stone House and you may furnish only that portion of the Information which you are advised by counsel is legally required to be so disclosed and you will request that the party(ies) receiving such Information maintain it as confidential.

All Information, all copies thereof, and any studies, notes, records, analysis, compilations or other documents prepared by you containing such Information, shall be and remain the property of Stone House and, upon the request of a representative of Stone House, all such information shall be returned or, at Stone House's option, destroyed by you, with such destruction confirmed by you to Stone House in writing.

This Agreement shall be governed by the laws of the State of New York, without regard to the principles of the conflicts of laws thereof.  The parties agree to the exclusive jurisdiction of the state and federal courts of New York, New York, and waive, and agree not to plead or to make, any claim that any action or proceeding brought in the state and federal courts of New York, New York has been brought in an improper or inconvenient forum.

THE PARTIES HEREBY IRREVOCABLY AND UNCONDITIONALLY WAIVE, TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW, ANY RIGHT THAT THEY MAY HAVE TO TRIAL BY JURY OF ANY CLAIM OR CAUSE OF ACTION, OR IN ANY LEGAL PROCEEDING, DIRECTLY OR INDIRECTLY BASED UPON OR ARISING OUT OF THIS AGREEMENT OR THE TRANSACTIONS CONTEMPLATED BY THIS LETTER AGREEMENT (WHETHER BASED ON CONTRACT, TORT OR ANY OTHER THEORY). EACH PARTY HERETO (A) CERTIFIES THAT NO REPRESENTATIVE, AGENT OR ATTORNEY OF THE OTHER PARTY HAS REPRESENTED, EXPRESSLY OR OTHERWISE, THAT SUCH OTHER PARTY WOULD NOT, IN THE EVENT OF LITIGATION, SEEK TO ENFORCE THE FOREGOING WAIVER AND (B) ACKNOWLEDGES THAT IT AND THE OTHER PARTY HAVE BEEN INDUCED TO ENTER INTO THIS LETTER AGREEMENT BY, AMONG OTHER THINGS, THE MUTUAL WAIVERS AND CERTIFICATIONS SET FORTH HEREIN.

*          *          *

If you agree to the foregoing terms, please sign below to indicate your acceptance.