[144] Sun Country Airlines Holdings, Inc. SEC Filing

Rhea-AI Filing Summary

Sun Country Airlines Holdings, Inc. (SNCY) – Form 144 filing

The notice discloses that Grant N. Whitney intends to sell 893 shares of SNCY common stock, representing roughly 0.0017 % of the 53.2 million shares outstanding. The proposed sale, to be executed through Fidelity Brokerage Services, is valued at approximately $10,903.53 and is scheduled for 02 July 2025 on the Nasdaq.

The shares derive from restricted-stock units that vested on 30 June 2025 as part of compensation. Whitney has also sold 1,277 shares over the past three months, generating gross proceeds of $14,679.20.

While insider sales can signal reduced confidence, the dollar value and percentage of outstanding shares are immaterial for valuation purposes. No new operational or financial information about Sun Country Airlines is provided; the filing is strictly a regulatory disclosure of a prospective, small-scale insider transaction.

Positive

• None.

Negative

• Insider selling: Grant N. Whitney plans to unload 893 shares following previous sales, which some investors may interpret as a cautionary signal, albeit immaterial in size.

Insights

Securities Analyst

TL;DR: Small Form 144 insider sale; immaterial to valuation, but adds modest supply.

The filing signals Grant N. Whitney’s intention to sell 893 recently vested shares worth ~$11k. Combined with prior 3-month sales, total disposition is 1,277 shares—far below 1 % of daily trading volume and only 0.002 % of shares outstanding. The transaction appears routine (vesting-related), not part of a larger liquidation. Market impact should be negligible, though some investors view any insider selling negatively. No strategy, earnings, or guidance changes are indicated, so the overall investment thesis for SNCY remains unchanged.

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

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

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

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	Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917	893	10903.53	53201003	07/02/2025	NASDAQ

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	06/30/2025	Restricted Stock Vesting	Issuer			893	06/30/2025	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
Grant N. Whitney 2005 Cargo Road Minneapolis MN 55450	Common	04/02/2025	883	10048.54
Grant N. Whitney 2005 Cargo Road Minneapolis MN 55450	Common	07/01/2025	394	4630.66

144: Remarks and Signature

Remarks

Date of Notice

Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1

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

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

How many Sun Country Airlines (SNCY) shares are being sold under this Form 144?

The notice covers 893 common shares to be sold.

What is the approximate market value of the shares to be sold?

The 893 shares are valued at $10,903.53 based on prevailing market prices.

When is the planned sale date for the SNCY shares?

The filing lists an approximate sale date of 02 July 2025.

What percentage of Sun Country Airlines’ outstanding shares does the sale represent?

The sale equals about 0.0017 % of the 53.2 million shares outstanding.

Has the insider sold any other SNCY shares recently?

Yes. Over the past three months, 1,277 shares were sold for gross proceeds of $14,679.20.

What is the source of the shares being sold?

They were acquired through restricted stock vesting on 30 June 2025 as compensation.