Star Bulk director buys 60,000 shares in Greece

SBLK director Raffaele Zagari bought 60,000 shares tied to Greek offerings after the company’s dual listing on Euronext Athens, increasing both direct and indirect holdings.

Rhea-AI Filing Summary

Star Bulk Carriers Corp. (SBLK) director Raffaele Zagari reported purchasing a total of 60,000 common shares on September 15, 2026 in connection with offerings in Greece following the company’s dual listing on Euronext Athens. He acquired 10,000 shares directly and 50,000 shares indirectly through a corporation he controls.

The direct purchase increased his personal holdings to 37,580 shares. The 50,000 indirectly held shares, subscribed by Augustea Med Ltd., brought his indirect holdings to 1,953,000 shares, held via two corporations in which he indirectly holds 100% of the economic interest and has investment control. The purchases were reported at $28.27 per share, with footnotes indicating an offering price of €24.50, and no Rule 10b5-1 trading plan is reported.

Insider Trade Summary

Net Buyer: 60,000 shares

Net Buy 2 txns

Insider Zagari Raffaele

Role Director

Bought 60,000 shs ($1.70M)

Type	Security	Shares	Price	Value
Purchase	Common shares, par value $0.01 per share F2, F1	10,000	$28.27	$283K
Purchase	Common shares, par value $0.01 per share F4, F1, F3	50,000	$28.27	$1.41M

Holdings After Transaction: Common shares, par value $0.01 per share — 37,580 shares (Direct); Common shares, par value $0.01 per share — 1,953,000 shares (Indirect, By Corporation)

Footnotes (4)

1. F1. euro 24.50
2. F2. Participation in the Parallel Offering undertaken by STAR BULK CARRIERS CORP in Greece, following its dual listing on Euronext Athens, pursuant to which I personally subscribed to 10,000 new common shares at the offering price
3. F3. These shares are held by two corporations in which the reporting person indirectly holds 100% of the economic interest and over which the reporting person has investment control
4. F4. Participation in the Public Offering undertaken by STAR BULK CARRIERS CORP in Greece, following its dual listing on Euronext Athens, pursuant to which the entity (Augustea Med ltd.) subscribed to 50,000 new common shares at the offering price

Key Figures

Direct shares purchased: 10,000 shares Indirect shares purchased: 50,000 shares Total shares purchased: 60,000 shares +4 more

7 metrics

Direct shares purchased 10,000 shares Direct subscription in Parallel Offering on September 15, 2026

Indirect shares purchased 50,000 shares Indirect subscription by Augustea Med Ltd. in Public Offering on September 15, 2026

Total shares purchased 60,000 shares Aggregate of direct and indirect purchases reported for September 15, 2026

Reported purchase price $28.27 per share Price field for both non-derivative purchase transactions

Offering price in euros €24.50 per share Footnote states “euro 24.50” as the offering price for the Greek offerings

Direct holdings after transaction 37,580 shares Total common shares held directly by Zagari after the direct purchase

Indirect holdings after transaction 1,953,000 shares Total common shares held indirectly through corporations after the indirect purchase

Key Terms

Parallel Offering, Public Offering, dual listing, indirectly holds 100% of the economic interest, +1 more

5 terms

Parallel Offering financial

"Participation in the Parallel Offering undertaken by STAR BULK CARRIERS CORP in Greece"

Public Offering financial

"Participation in the Public Offering undertaken by STAR BULK CARRIERS CORP in Greece"

A public offering is when a company sells shares to the general public through the stock market, either by issuing new shares to raise cash or by letting existing owners sell their stakes. Think of it like a business opening its doors to many new owners at once: it can bring in money for growth but also increases the number of shares available, which can change the stock price and dilute existing ownership — key factors investors watch closely.

dual listing financial

"following its dual listing on Euronext Athens"

A dual listing is when a company makes the same shares available on two different stock exchanges, often in different countries, so investors can buy and sell the same ownership stake in more than one market—like a shop opening branches in two cities that sell the same product. It matters to investors because it can widen the pool of buyers, make shares easier to trade, expose the stock to different currencies and rules, and create price differences or arbitrage opportunities that affect returns and risk.

indirectly holds 100% of the economic interest financial

"in which the reporting person indirectly holds 100% of the economic interest"

investment control financial

"and over which the reporting person has investment control"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider share purchases did SBLK director Raffaele Zagari report?

Raffaele Zagari reported buying 60,000 Star Bulk (SBLK) common shares on September 15, 2026, including 10,000 shares directly and 50,000 shares indirectly through a corporation he controls, in connection with offerings in Greece following the company’s dual listing on Euronext Athens.

At what price were the SBLK shares acquired in Zagari’s September 15, 2026 transactions?

The transactions were reported at a price of $28.27 per share. A footnote states an offering price of €24.50 for the Greek offerings, indicating the participation occurred at that euro-denominated offering price.

How many SBLK shares does Zagari hold directly after these transactions?

After the September 15, 2026 direct purchase, Raffaele Zagari holds 37,580 SBLK common shares directly. This reflects the addition of 10,000 new common shares subscribed in the Parallel Offering in Greece at the stated offering price.

What are Zagari’s indirect holdings of SBLK after the reported purchases?

Following the indirect purchase, entities associated with Raffaele Zagari hold 1,953,000 SBLK common shares indirectly. These shares are held by two corporations in which he indirectly holds 100% of the economic interest and over which he has investment control.

Were Zagari’s SBLK share purchases made under a Rule 10b5-1 trading plan?

No. The Form 4 indicates no Rule 10b5-1 trading plan for these transactions; the document-level checkbox for such a plan is not checked, and the footnotes do not describe any pre-arranged trading plan.

What offerings are associated with Zagari’s SBLK share subscriptions in Greece?

The filings state that Zagari personally subscribed to 10,000 new common shares in a Parallel Offering and Augustea Med Ltd. subscribed to 50,000 new common shares in a Public Offering in Greece, both undertaken following Star Bulk’s dual listing on Euronext Athens.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 09/17/2026 - 11:02 AM Accepted by SEC EDGAR 09/17/2026 - 11:02 AM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Zagari Raffaele

(Last) (First) (Middle)

C/O STAR BULK MANAGEMENT INC

40 AG KONSTANTINOU

(Street)

ATHENS 15124

(City) (State) (Zip)

GREECE

(Country)

2. Issuer Name and Ticker or Trading Symbol
Star Bulk Carriers Corp. [ SBLK ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/15/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common shares, par value $0.01 per share	09/15/2026		P		10,000(2)	A	$28.27(1)	37,580	D
Common shares, par value $0.01 per share	09/15/2026		P		50,000(4)	A	$28.27(1)	1,953,000	I	By Corporation(3)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. euro 24.50

2. Participation in the Parallel Offering undertaken by STAR BULK CARRIERS CORP in Greece, following its dual listing on Euronext Athens, pursuant to which I personally subscribed to 10,000 new common shares at the offering price

3. These shares are held by two corporations in which the reporting person indirectly holds 100% of the economic interest and over which the reporting person has investment control

4. Participation in the Public Offering undertaken by STAR BULK CARRIERS CORP in Greece, following its dual listing on Euronext Athens, pursuant to which the entity (Augustea Med ltd.) subscribed to 50,000 new common shares at the offering price

	/s/ Raffaele Zagari	09/17/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)