FORM 6-K

SECURITIES AND EXCHANGE COMMISSION

Washington, D. C. 20549

Report of Foreign Private Issuer

Pursuant to Rule 13a-16 or 15d-16 of

the Securities Exchange Act of 1934

For the month of July 2008

STAR BULK CARRIERS CORP.

(Translation of registrant's name into English)

Star Bulk Carriers Corp.
Aethrion Center, Suite B-34
40 Ag. Konstantinou
Maroussi 15124
Athens, Greece

(Address of principal executive offices)

Indicate by check mark whether the registrant files or will file annual

reports under cover Form 20-F or Form 40-F.

Form 20-F |X| Form 40-F |_|

Indicate by check mark whether the registrant by furnishing the information

contained in this Form is also thereby furnishing the information to the

commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.

Yes |_| No |X|

<PAGE>

INFORMATION CONTAINED IN THIS FORM 6-K REPORT

EXHIBIT 1

STAR BULK CARRIERS CORP. UPDATES ON OWNERSHIP

OF INSIDER HOLDINGS

ATHENS, GREECE, July 30, 2008 – Star Bulk Carriers Corp. (the “Company” or “Star Bulk”) (NASDAQ: SBLK), announced today that F5 Capital, a company affiliated with Mr. Nobu Su, one of the Company’s directors, filed a Schedule 13D report yesterday with the Securities and Exchange Commission to disclose its disposition of approximately 9.5 million Star Bulk common shares in certain private transactions.  According to the Schedule 13D, F5 Capital’s beneficial ownership in the Company has been reduced to approximately 3.8 million shares, representing roughly 7% of the Company’s issued and outstanding shares. .

Akis Tsirigakis, President and CEO of Star Bulk commented:  “The sale of a number of Star Bulk shares held by a company affiliated with Nobu Su was effected with the consent of our Board of Directors. It does not affect our business plan and does not diminish our confidence in the positive outlook of the dry bulk sector and the prospects of our company. Further, Mr. Su’s affiliated company continues to be a significant shareholder.  There has been no change in our Board of Directors and  Mr. Su remains a Director. We welcome the higher free float and the potential for increased liquidity of our shares.”

About Star Bulk

Star Bulk is a global shipping company providing worldwide seaborne transportation solutions in the dry bulk sector. Star Bulk's vessels transport major bulks, which include iron ore, coal and grain and minor bulks such as bauxite, fertilizers and steel products. Star Bulk was incorporated in the Marshall Islands on December 13, 2006 and is headquartered in Athens, Greece. Its common stock and warrants trade on the NASDAQ Global Market under the symbols "SBLK" and "SBLKW" respectively. Currently, Star Bulk has an operating fleet of twelve dry bulk carriers, plus definitive agreements to acquire one Capesize dry bulk carrier and sell its Panamax dry bulk carrier. The total fleet consists of four Capesize, one Panamax and eight Supramax dry bulk vessels with an average age of approximately 10 years and a combined cargo carrying capacity of 1,184,835 deadweight tons.

Forward-Looking Statements

The information in this press release may contain forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Forward-looking statements include, but are not limited to, statements regarding: (1) the delivery and operation of assets of Star Bulk; (2) Star Bulk's future operating or financial results; (3) future, pending or recent acquisitions, business strategy, areas of possible expansion, and expected capital spending or operating expenses; (4) drybulk market trends, including charter rates and factors affecting vessel supply and demand; and (5) other statements identified by words such as "anticipate," "believe," "plan," "estimate," "expect," "intend," "should," "may," or words of similar meaning.

Such forward looking statements are based upon various assumptions, many of which are based, in turn, upon further assumptions, including without limitation, Star Bulk's examination of historical operating trends, data contained in their records and other data available from third parties. Although Star Bulk believes that these assumptions were reasonable when made, because these assumptions are inherently subject to significant uncertainties and contingencies which are difficult or impossible to predict and are beyond their control, Star Bulk cannot assure you that Star Bulk will achieve or accomplish these expectations, beliefs or projections. Important factors that could cause actual results to differ materially from those discussed in the forward-looking statements include the failure of a seller to deliver one or more vessels, the strength of world economies and currencies, general market conditions, including changes in charterhire rates and vessel values, changes in demand that may affect attitudes of time charterers to scheduled and unscheduled drydocking, changes in Star Bulk's operating expenses, including bunker prices, dry-docking and insurance costs, or actions taken by regulatory authorities, potential liability from pending or future litigation, domestic and international political conditions, potential disruption of shipping routes due to accidents and political events or acts by terrorists. Additional factors that could cause Star Bulk's results to differ materially from those described in the forward-looking statements can be found in Star Bulk's Annual Report on Form 20-F, Registration Statement on Form F-1/F-4 and reports on Form 6-K filed with the Securities and Exchange Commission (the "SEC") and available at the SEC's Internet site (http://www.sec.gov). The information set forth herein speaks only as of the date hereof, and Star Bulk disclaims any intention or obligation to update any forward looking statements as a result of developments occurring after the date of this communication.

Contacts:

Company:
George Syllantavos
CFO
Star Bulk Carriers Corp.
7 Fragoklisias Street
Maroussi 15125, Athens, Greece
E-mail: ir@starbulk.com
www.starbulk.com

Investor Relations / Financial Media:
Nicolas Bornozis
President
Capital Link, Inc.
230 Park Avenue, Suite 1536
New York, NY 10169
Tel. (212) 661-7566
E-mail: starbulk@capitallink.com
www.capitallink.com

STAR BULK CARRIERS CORP.

(Registrant)

Dated July 30, 2008

By:

/s/ PROKOPIOS TSIRIGAKIS

Name: Prokopios Tsirigakis

Title: Chief Executive Officer and President