BlackSky officer plans sale of 27,589 shares

BlackSky officer Christiana Lin filed a Rule 144 notice for tax-related sell-to-cover sales of vested RSU shares.

Rhea-AI Filing Summary

BlackSky Technology Inc. (BKSY) is the issuer for a planned Rule 144 sale by officer Christiana Lin. A notice covers Class A common stock to be sold through Morgan Stanley Smith Barney LLC, with shares related to restricted share units vesting and sold under an issuer-implemented, non-discretionary sell-to-cover arrangement to satisfy income tax liabilities, unless those taxes are paid in cash.

Key Figures

Planned shares to be sold: 27,589 shares Prior shares sold: 12,001 shares Gross proceeds from prior sale: $409,234.10 +2 more

5 metrics

Planned shares to be sold 27,589 shares Class A common stock in Securities To Be Sold section tied to RSU vesting on September 10, 2026

Prior shares sold 12,001 shares Securities Sold During The Past 3 Months on June 10, 2026

Gross proceeds from prior sale $409,234.10 Reported for the June 10, 2026 sale of 12,001 shares

Notice date September 10, 2026 Date of Notice signed by Christiana Lin

Broker Morgan Stanley Smith Barney LLC Listed as broker for the Class A common stock on NYSE

Key Terms

Rule 144, restricted share unit, sell-to-cover, Equity Compensation

4 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

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 share unit financial

"upon vesting of restricted share unit awards only, unless the reporting"

A restricted share unit (RSU) is a promise by a company to give an employee a set number of company shares at a future date, typically after meeting time or performance conditions. For investors, RSUs matter because when they convert into actual shares they increase the number of shares outstanding (like unlocking more tickets in a game), which can dilute existing holders, and they align employee incentives with company performance, influencing behavior and long-term value.

sell-to-cover financial

"non-discretionary sell-to-cover arrangement for the purposes of satisfying"

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.

Equity Compensation financial

"09/10/2026 | Equity Compensation"

Equity compensation is pay given to employees, executives or contractors in the form of company ownership—such as stock, stock options or restricted shares—rather than just cash. It matters to investors because it can align workers' incentives with shareholders (like paying someone in slices of the same pie they help grow), but it also increases the number of shares outstanding and company expenses, affecting ownership percentages and earnings per share.

FAQ

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

What does the Form 144 filing for BKSY disclose about Christiana Lin?

It discloses that officer Christiana Lin plans a Rule 144 sale of BlackSky Class A common stock through Morgan Stanley Smith Barney LLC, tied to restricted share units vesting and using a non-discretionary sell-to-cover arrangement to pay income tax liabilities on those awards.

How many BKSY shares are covered for future sale in this Form 144?

The notice lists 27,589 shares of BlackSky Class A common stock in the “Securities To Be Sold” section, associated with restricted share units vesting on September 10, 2026 and identified as “Equity Compensation.”

What prior BKSY share sales by Christiana Lin are reported in the last 3 months?

The filing reports that Christiana Lin sold 12,001 shares of BlackSky Class A common stock on June 10, 2026, with reported gross proceeds of $409,234.10 in the “Securities Sold During The Past 3 Months” section.

What is the purpose of the planned BKSY share sales in this Form 144?

The remarks state that the securities are sold under an issuer-implemented, non-discretionary sell-to-cover arrangement solely to satisfy income tax liabilities incurred upon vesting of restricted share unit awards, unless Christiana Lin chooses to pay those taxes in cash.

Which broker is involved in the BKSY Rule 144 sale for Christiana Lin?

The broker listed for the Class A common stock is Morgan Stanley Smith Barney LLC, Executive Financial Services, at 1 New York Plaza, New York, with the shares indicated for trading on the NYSE.

When was the notice for this BKSY Rule 144 sale filed?

The Form 144 notice is dated September 10, 2026, which is also the date associated with the vesting of the restricted share units referenced in the “Securities To Be Sold” section.

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

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Available on EDGAR 09/10/2026 - 08:37 PM EDT Accepted by SEC EDGAR 09/10/2026 - 08:37 PM EDT 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	0001400954
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	BlackSky Technology Inc.
SEC File Number	001-39113
Address of Issuer	2411 Dulles Corner Park Suite 300 Herndon VIRGINIA 20171
Phone	703-935-1930
Name of Person for Whose Account the Securities are To Be Sold	Christiana Lin
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
Class A Common Stock	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza, 8th Floor New York NY 10004	13101	271846	427631	09/11/2026	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 *
Class A Common Stock	09/10/2026	Restricted Share Units Vesting - See Remarks.	Issuer			27589	09/10/2026	Equity Compensation

* 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

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Christiana Lin 2411 Dulles Corner Park Suite 300 Herndon VA 20171	Class A Common Stock	06/10/2026	12001	409234.1

144: Remarks and Signature

Remarks	The reporting person sold the securities reported herein pursuant to an Issuer-implemented, non-discretionary sell-to-cover arrangement for the purposes of satisfying income tax liabilities incurred upon vesting of restricted share unit awards only, unless the reporting person elects to pay such tax liabilities in cash.
Date of Notice	09/10/2026
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/ Christiana Lin
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)