HawkEye 360 officer plans sale of 26.5K shares

HawkEye 360, Inc. officer Michael S. Turner has filed a notice of proposed sale under Rule 144 for up to 26,506 shares of the company’s common stock, to be sold through Morgan Stanley Smith Barney LLC on or about September 15, 2026 on the NYSE.

Rhea-AI Filing Summary

HawkEye 360, Inc. officer Michael S. Turner has filed a notice of proposed sale under Rule 144 for up to 26,506 shares of the company’s common stock, to be sold through Morgan Stanley Smith Barney LLC on or about September 15, 2026 on the NYSE.

The filing reports an aggregate market value of approximately $434,168.28 for the shares and states that HawkEye 360, Inc. had 97,965,552 shares of common stock outstanding. Part of the sale will fund tax withholding via a sell-to-cover on vesting Restricted Stock Units, with the balance under a Rule 10b5-1 trading plan.

Key Figures

Shares to be sold: 26,506 shares Aggregate market value of shares: $434,168.28 Shares outstanding: 97,965,552 shares +2 more

5 metrics

Shares to be sold 26,506 shares Maximum number of HawkEye 360, Inc. common shares covered by the Rule 144 notice

Aggregate market value of shares $434,168.28 Aggregate market value of the 26,506 shares referenced in the notice

Shares outstanding 97,965,552 shares HawkEye 360, Inc. common shares outstanding as referenced in the notice

Approximate sale date September 15, 2026 Planned date for sales under the Form 144 notice

Security type Common Stock Class of HawkEye 360, Inc. securities to be sold

Key Terms

Rule 144, Restricted Stock Units, sell-to-cover, Rule 10b5-1 trading plan

4 terms

Rule 144 regulatory

"Includes shares to be sold pursuant to the Issuer's mandatory election..."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

Restricted Stock Units financial

"upon the vesting and settlement of Restricted Stock Units, and the balance..."

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

sell-to-cover financial

"mandatory election that tax withholding obligations be funded by a sell-to-cover transaction..."

Sell-to-cover is when part of newly issued or exercised company stock is immediately sold to pay required taxes and fees, so the recipient keeps the remaining shares. For investors this matters because it reduces the number of shares insiders or employees actually hold after a grant, can create small, routine share sales that aren’t signal of cashing out, and slightly increases share supply on the market—like selling a portion of a paycheck to cover the tax bill.

Rule 10b5-1 trading plan regulatory

"and the balance pursuant to a Rule 10b5-1 trading plan adopted by the reporting person."

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

FAQ

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

What does the Form 144 filing indicate for HAWK (HawkEye 360, Inc.)?

It indicates that officer Michael S. Turner plans to sell up to 26,506 shares of HawkEye 360, Inc. common stock under Rule 144, with planned sales beginning on or about September 15, 2026 through Morgan Stanley Smith Barney LLC on the NYSE.

How many HawkEye 360 (HAWK) shares are covered by this planned sale?

The notice covers up to 26,506 shares of HawkEye 360, Inc. common stock. The filing lists an aggregate market value of about $434,168.28 for these shares at the time of the notice.

When are the HAWK shares expected to be sold under this Form 144?

The approximate date of sale is listed as September 15, 2026. The shares are to be sold on the NYSE through Morgan Stanley Smith Barney LLC Executive Financial Services.

What portion of the HAWK share sale relates to RSUs and tax withholding?

The filing states that it includes shares to be sold to satisfy tax withholding obligations via a sell-to-cover transaction upon vesting and settlement of Restricted Stock Units, with the remaining shares sold under a Rule 10b5-1 plan.

How many HawkEye 360 (HAWK) shares were outstanding as referenced in this notice?

The notice reports that HawkEye 360, Inc. had 97,965,552 shares of common stock outstanding, providing context for the size of the proposed 26,506-share sale.

Is the HAWK Form 144 sale tied to a Rule 10b5-1 trading plan?

Yes. The remarks state that, beyond the sell-to-cover for RSU tax withholding, the balance of the shares are to be sold pursuant to a Rule 10b5-1 trading plan adopted by the reporting person.

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

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Available on EDGAR 09/15/2026 - 04:59 PM Accepted by SEC EDGAR 09/15/2026 - 04:59 PM Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001836524
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	HawkEye 360, Inc.
SEC File Number	001-43266
Address of Issuer	450 SPRINGPARK PL SUITE 500 HERNDON VIRGINIA 20170
Phone	571-203-0360
Name of Person for Whose Account the Securities are To Be Sold	Turner Michael S.
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common Stock	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	26506	434168.28	97965552	09/15/2026	NYSE

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common Stock	09/15/2026	Restricted Stock Units	Issuer			26506	09/15/2026	n/a

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Nothing to Report

144: Remarks and Signature

Remarks	Includes shares to be sold pursuant to the Issuer's mandatory election that tax withholding obligations be funded by a sell-to-cover transaction upon the vesting and settlement of Restricted Stock Units, and the balance pursuant to a Rule 10b5-1 trading plan adopted by the reporting person.
Date of Notice	09/15/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	05/21/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Michael Turner
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)