Star Bulk director buys 6,000 shares at €24.50

A Star Bulk Carriers director bought additional shares in the Greek Parallel Offering tied to the company’s dual listing on Euronext Athens.

Rhea-AI Filing Summary

Star Bulk Carriers Corp. (SBLK) director Erhardt Koert purchased 6,000 common shares on September 15, 2026 in connection with participation in a Parallel Offering in Greece following the company’s dual listing on Euronext Athens. The shares were acquired at an offering price of €24.50 per share, equivalent to $28.27 per share, and are held directly. Following this transaction, Koert beneficially owns 16,080 Star Bulk common shares. No Rule 10b5-1 trading plan is reported for this purchase.

Insider Trade Summary

Net Buyer: 6,000 shares

Net Buy 1 txn

Insider Erhardt Koert

Role Director

Bought 6,000 shs ($170K)

Type	Security	Shares	Price	Value
Purchase	Common shares, par value $0.01 per share	6,000	$28.27	$170K

Holdings After Transaction: Common shares, par value $0.01 per share — 16,080 shares (Direct)

Key Figures

Shares purchased: 6,000 shares Euro offering price per share: €24.50 per share U.S. dollar equivalent price per share: $28.27 per share +2 more

5 metrics

Shares purchased 6,000 shares Common shares acquired by director on September 15, 2026

Euro offering price per share €24.50 per share Price in Parallel Offering in Greece

U.S. dollar equivalent price per share $28.27 per share Equivalent per-share price stated for the offering

Shares owned after transaction 16,080 shares Total common shares beneficially owned by Erhardt Koert after purchase

Transaction date September 15, 2026 Date of the 6,000-share purchase

Key Terms

Parallel Offering, dual listing, Rule 10b5-1

3 terms

Parallel Offering financial

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

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.

Rule 10b5-1 regulatory

"No Rule 10b5-1 trading plan is reported for this purchase"

Rule 10b5-1 is a regulation that allows company insiders to buy or sell their shares at predetermined times, even if they have access to non-public information. It acts like setting a schedule in advance for transactions, helping prevent accusations of unfair trading. This rule provides a way for insiders to plan trades transparently, giving investors confidence that these transactions are not based on hidden information.

FAQ

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

What insider transaction did SBLK report for director Erhardt Koert?

Director Erhardt Koert purchased 6,000 common shares of Star Bulk Carriers Corp. on September 15, 2026, participating in a Parallel Offering in Greece following the company’s dual listing on Euronext Athens.

At what price were the SBLK shares purchased in this Form 4 filing?

The 6,000 Star Bulk Carriers (SBLK) shares were purchased at an offering price of €24.50 per share, described as equivalent to $28.27 per share, as part of the Parallel Offering in Greece.

How many SBLK shares does Erhardt Koert own after this transaction?

After the reported purchase, Erhardt Koert beneficially owns 16,080 common shares of Star Bulk Carriers Corp., held directly, according to the Form 4 disclosure.

Was the SBLK insider purchase made under a Rule 10b5-1 trading plan?

No. The filing indicates the Rule 10b5-1 checkbox is not marked, and there is no footnote stating that the 6,000-share purchase was made under a Rule 10b5-1 or other pre-arranged trading plan.

What is the context of the SBLK Parallel Offering mentioned in the Form 4?

The purchase reflects participation in a Parallel Offering in Greece undertaken by Star Bulk Carriers Corp., which followed its dual listing on Euronext Athens, with 6,000 new common shares subscribed at the stated offering price.

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

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Available on EDGAR 09/16/2026 - 11:02 AM Accepted by SEC EDGAR 09/16/2026 - 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^*

Erhardt Koert

(Last) (First) (Middle)

VALLESPIR UNIT 16, LEVEL 2,

BOULEVARD DU LARVOTTO

(Street)

MONACO 98000

(City) (State) (Zip)

MONACO

(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		6,000	A	$28.27	16,080	D

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:

Remarks:

Participation in the Parallel Offering undertaken by STAR BULK CARRIERS CORP in Greece, following its dual listing on EURONEXT ATHENS, pursuant to which subscribed to 6,000 new common shares at the offering price of euro 24.50 per share (or equivalent $28.27 per share)

	Koert Erhardt	09/16/2026
	** 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)