13D Filing: DAFNA Capital Management and Stereotaxis Inc. (STXS)

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13D

[Rule 13d-101]

INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO SECTION 24.13d-1(a) AND AMENDMENTS
THERETO FILED PURSUANT TO SECTIONS 240.13D-2(a)

(Amendment No. 4)*

STEREOTAXIS, INC.

(Name
of Issuer)

Common Stock, $0.001 Par Value

(Title of Class of Securities)

85916J409

(CUSIP Number)

Attention: Dr. Nathan Fischel

DAFNA Capital Management, LLC

10990 Wilshire Boulevard, Suite 1400

Los Angeles, California 90024

310-954-3200

(Name, Address and Telephone Number of Person

Authorized to Receive Notices and Communications)

March 5, 2018

(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 that is the subject of this Schedule 13D, and is filing this schedule because of sections 240.13d-1(e),
240.13d-1(f) or 240.13d-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 persons 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 (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).

(Continued on following pages)

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