UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d) OF THE

SECURITIES EXCHANGE ACT OF 1934

Date of report (Date of earliest event reported): July 12, 2011 (July 12, 2011)

GLENROSE INSTRUMENTS INC.

(Exact Name of Registrant as Specified in Its Charter)

Delaware

(State or Other Jurisdiction of Incorporation)

000-51645 (Commission File Number)	20-3521719 (IRS Employer Identification No.)

45 First Avenue, Waltham Massachussetts (Address of Principal Executive Offices)	02451 (Zip Code)

(781) 622-1120

(Registrant’s Telephone Number, Including Area Code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

o Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

o Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

o Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

o Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 5.02. Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officer

(b) Resignation or removal of directors other than as a result of disagreement or removal for cause.

On July 12, 2011, John H. Park resigned from his position as member of the Board of Directors of GlenRose Instruments Inc. (or the Registrant), effective immediately. Mr. Park resigned to pursue other opportunities and the Registrant believes there are no disagreements between Mr. Park and the Registrant related to the Registrant’s operations, policies or procedures that caused the resignation.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

Date: July 12, 2011

GLENROSE INSTRUMENTS INC.

By: /s/ Anthony S. Loumidis

_____________________________________

Anthony S. Loumidis, Chief Financial Officer

GlenRose Instruments Inc. 8-K