Bandwidth controller sells 3,074 shares at $48.97

Bandwidth Inc.’s Controller and Principal Accounting Officer sold 3,074 Class A shares under a pre-arranged Rule 10b5-1 trading plan, leaving 11,958 shares directly held.

Rhea-AI Filing Summary

Bandwidth Inc. (BAND) reported that Devin M. Krupka, Controller and Principal Accounting Officer, sold 3,074 shares of Class A Common Stock on September 1, 2026 in an open-market or private transaction at an average price of $48.97 per share.

After this sale, Krupka directly held 11,958 shares of Bandwidth Inc. stock. The sale was made pursuant to a Rule 10b5-1 trading plan adopted on March 13, 2026, indicating it was pre-arranged under that plan.

Insider Trade Summary 10b5-1

Net Seller: 3,074 shares

Net Sell 1 txn

Insider Krupka Devin M

Role Controller, PAO

Sold 3,074 shs ($151K)

Type	Security	Shares	Price	Value
Sale	Class A Common Stock F1	3,074	$48.9739	$151K

Holdings After Transaction: Class A Common Stock — 11,958 shares (Direct)

Footnotes (1)

1. F1. Reflects shares sold pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on March 13, 2026.

Key Figures

Shares sold: 3,074 shares Sale price per share: $48.97 per share Shares held after transaction: 11,958 shares +2 more

5 metrics

Shares sold 3,074 shares Class A Common Stock sold by Devin M. Krupka on September 1, 2026

Sale price per share $48.97 per share Average price received for the 3,074 shares sold on September 1, 2026

Shares held after transaction 11,958 shares Direct holdings of Devin M. Krupka after the reported sale

Shares sold under Rule 10b5-1 plan 3,074 shares Transaction executed pursuant to a Rule 10b5-1 plan adopted March 13, 2026

Rule 10b5-1 plan adoption date March 13, 2026 Date the trading plan governing the reported sale was adopted

Key Terms

Rule 10b5-1 plan, Class A Common Stock

2 terms

Rule 10b5-1 plan regulatory

"Reflects shares sold pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on March 13, 2026."

A Rule 10b5-1 plan is a prearranged, written schedule that lets corporate insiders buy or sell company stock at set times or amounts, even if they later learn material nonpublic information. Think of it like setting an automatic thermostat for trades: it creates a clear record that trades were planned in advance, reducing the risk of insider-trading accusations and helping investors trust that insider transactions are routine rather than based on secret information.

Class A Common Stock financial

"Sale of Class A Common Stock by an officer of Bandwidth Inc."

Class A common stock is a category of a company’s shares that carries a specific set of ownership rights—most commonly defined voting power and claims on dividends—set out in the company’s charter. For investors it matters because the class determines how much influence you have over corporate decisions, the share’s likely dividend and trading behavior, and how it compares in value to other share classes, like choosing a particular seat with different privileges at the company’s decision-making table.

FAQ

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

What insider transaction did Bandwidth Inc. (BAND) disclose for Devin M. Krupka?

Bandwidth Inc. disclosed that Devin M. Krupka, Controller and Principal Accounting Officer, sold 3,074 shares of Class A Common Stock on September 1, 2026 in an open-market or private transaction at $48.97 per share.

How many Bandwidth Inc. (BAND) shares does Devin M. Krupka hold after the reported sale?

After the reported transaction, Devin M. Krupka directly holds 11,958 shares of Bandwidth Inc. Class A Common Stock, as stated in the filing.

Was the Bandwidth Inc. (BAND) insider sale made under a Rule 10b5-1 plan?

Yes. The filing states the 3,074-share sale was made pursuant to a Rule 10b5-1 plan adopted by Devin M. Krupka on March 13, 2026, indicating the trade was pre-arranged under that plan.

What price did the Bandwidth Inc. (BAND) insider receive per share in the sale?

The sale by Devin M. Krupka of 3,074 shares of Bandwidth Inc. Class A Common Stock on September 1, 2026 was executed at an average price of $48.97 per share.

What is Devin M. Krupka’s role at Bandwidth Inc. (BAND) in this Form 4 filing?

In this Form 4, Devin M. Krupka is identified as an officer of Bandwidth Inc., serving as Controller and Principal Accounting Officer of the company.

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

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Available on EDGAR 09/02/2026 - 04:07 PM EDT Accepted by SEC EDGAR 09/02/2026 - 04:06 PM EDT 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).

X

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^*

Krupka Devin M

(Last) (First) (Middle)

C/O BANDWIDTH INC.

2230 BANDMATE WAY

(Street)

RALEIGH NORTH CAROLINA 27607

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Bandwidth Inc. [ BAND ]

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/01/2026

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
Class A Common Stock	09/01/2026		S(1)		3,074	D	$48.9739	11,958	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:

1. Reflects shares sold pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on March 13, 2026.

Remarks:

	/s/ Leah Webb, Attorney-in-Fact for Devin M. Krupka	09/02/2026
	** 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)