Sun Country Airlines Holdings, Inc. ownership update: a group of Citadel-related entities and Kenneth Griffin report shared beneficial ownership positions in the company’s common stock. The filing shows Citadel Advisors LLC, Citadel Advisors Holdings LP and Citadel GP LLC each may be deemed to beneficially own 1,315,590 shares (each 2.4% of the class). Citadel Securities entities report roughly 26,344–26,534 shares each, and Mr. Kenneth Griffin may be deemed to beneficially own 1,342,124 shares (2.5%). The percentages are based on 54,191,637 Shares outstanding as of March 25, 2026.
Positive
None.
Negative
None.
Insights
Citadel group reports passive/beneficial holdings totaling low-single-digit stakes.
The filing lists shared beneficial ownership positions for multiple Citadel-related entities and Mr. Griffin, with principal holdings shown as 1,315,590 shares and 1,342,124 shares and smaller Citadel Securities positions. The percentages are tied to 54,191,637 Shares outstanding as of March 25, 2026.
These entries are typical Schedule 13G/A disclosures that describe beneficial ownership and voting/dispositive power; cash‑flow treatment or planned transactions are not stated in the excerpt. Subsequent disclosures would be required if the reporting status or holdings change.
Filing clarifies attribution and chain of control among related entities.
The statement explains the relationships: Citadel Advisors is portfolio manager for a Cayman fund, CAH is the sole member of Citadel Advisors, CGP is CAH's general partner, and Mr. Griffin controls CGP and CSGP. The filing explicitly disclaims that reporting persons are only beneficial owners of securities they actually own.
For governance review, note shared voting/dispositive power figures and the incorporated March 25, 2026 outstanding share base when assessing percent-of-class calculations.
"Each of Citadel Advisors LLC ... may be deemed to beneficially own 1,315,590 Shares."
Beneficially own means having the economic rights and risks of a security—such as the right to receive dividends, sell the shares, or profit from price changes—whether or not your name appears on the official share register. Think of it like renting a car: you use it and reap the benefits even if the title lists someone else. Investors care because beneficial ownership determines who truly controls value, must be disclosed under securities rules, and can signal potential influence or trading activity that affects a stock’s price.
shared dispositive powerregulatory
"Shared Dispositive Power 1,315,590.00 for Citadel Advisors LLC"
Schedule 13G/Aregulatory
"This is being jointly filed ... (Amendment No. 2 ) Sun Country Airlines Holdings, Inc."
A Schedule 13G/A is an amended public filing with the U.S. securities regulator that updates a previous Schedule 13G, disclosing when an individual or group holds a substantial (typically over 5%) stake in a company and is claiming a passive, non‑controlling intent. Investors monitor these updates because rising or falling holdings can signal changing confidence, potential future moves, or shifts in voting power — like watching a public ledger where large shareholders quietly adjust their positions.
CUSIPtechnical
"CUSIP No.: 866683105"
A CUSIP is a nine-character alphanumeric code that uniquely identifies a U.S. or Canadian financial security—such as a stock, bond, or fund share—like a Social Security number for an investment. It matters to investors because brokers, exchanges and record-keepers use the CUSIP to match trades, track ownership, settle transactions and pull accurate records, reducing errors and ensuring money and securities go to the right place.
How many Sun Country (SNCY) shares does Citadel Advisors report beneficially owning?
Citadel Advisors LLC may be deemed to beneficially own 1,315,590 shares, representing 2.4% of the class based on 54,191,637 shares outstanding as of March 25, 2026. The filing attributes shared voting and dispositive power to that amount.
What stake does Kenneth Griffin report in SNCY?
Kenneth Griffin may be deemed to beneficially own 1,342,124 shares, equal to 2.5% of the class using the issuer’s March 25, 2026 outstanding share count of 54,191,637. The filing reports shared voting and dispositive power for this amount.
What outstanding share base does the Schedule 13G/A use for SNCY percentage calculations?
The percentages in the filing are based on 54,191,637 Shares outstanding as of March 25, 2026, as cited from the issuer’s definitive proxy statement filed March 31, 2026. That base is used to compute the reported percentages.
Do the Citadel-related filers report sole voting or dispositive power for SNCY shares?
No. The filing shows 0 shares with sole voting or sole dispositive power for the primary Citadel reporting persons; the reported holdings are shown with shared voting and dispositive power (e.g., 1,315,590 shared for Citadel Advisors).
Are the reported holdings held directly or through funds/entities?
The filing states holdings relate to shares owned by Citadel Multi-Strategy Equities Master Fund Ltd., Citadel Securities, and CRBU Holdings LLC; Citadel Advisors is portfolio manager for the Cayman fund and entity relationships are disclosed in Item 2 of the filing.
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
UNDER THE SECURITIES EXCHANGE ACT OF 1934
(Amendment No. 2)
Sun Country Airlines Holdings, Inc.
(Name of Issuer)
Common Stock, par value $0.01 per share (the "Shares")
(Title of Class of Securities)
866683105
(CUSIP Number)
03/31/2026
(Date of Event Which Requires Filing of this Statement)
Check the appropriate box to designate the rule pursuant to which this Schedule is filed:
Rule 13d-1(b)
Rule 13d-1(c)
Rule 13d-1(d)
schemaVersion:
SCHEDULE 13G
CUSIP Number(s):
866683105
1
Names of Reporting Persons
Citadel Advisors LLC
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
DELAWARE
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
1,315,590.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
1,315,590.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
1,315,590.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
2.4 %
12
Type of Reporting Person (See Instructions)
IA, HC, OO
Comment for Type of Reporting Person: The percentages reported in this Schedule 13G are based upon 54,191,637 Shares outstanding as of March 25, 2026 (according to the issuer's definitive proxy statement as filed with the Securities and Exchange Commission on March 31, 2026).
SCHEDULE 13G
CUSIP Number(s):
866683105
1
Names of Reporting Persons
Citadel Advisors Holdings LP
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
DELAWARE
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
1,315,590.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
1,315,590.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
1,315,590.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
2.4 %
12
Type of Reporting Person (See Instructions)
HC, PN
SCHEDULE 13G
CUSIP Number(s):
866683105
1
Names of Reporting Persons
Citadel GP LLC
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
DELAWARE
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
1,315,590.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
1,315,590.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
1,315,590.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
2.4 %
12
Type of Reporting Person (See Instructions)
HC, OO
SCHEDULE 13G
CUSIP Number(s):
866683105
1
Names of Reporting Persons
Citadel Securities LLC
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
DELAWARE
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
26,344.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
26,344.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
26,344.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
0.0 %
12
Type of Reporting Person (See Instructions)
BD, OO
SCHEDULE 13G
CUSIP Number(s):
866683105
1
Names of Reporting Persons
Citadel Securities Group LP
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
DELAWARE
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
26,534.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
26,534.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
26,534.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
0.0 %
12
Type of Reporting Person (See Instructions)
HC, PN
SCHEDULE 13G
CUSIP Number(s):
866683105
1
Names of Reporting Persons
Citadel Securities GP LLC
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
DELAWARE
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
26,534.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
26,534.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
26,534.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
0.0 %
12
Type of Reporting Person (See Instructions)
HC, OO
SCHEDULE 13G
CUSIP Number(s):
866683105
1
Names of Reporting Persons
Kenneth Griffin
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
UNITED STATES
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
1,342,124.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
1,342,124.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
1,342,124.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
2.5 %
12
Type of Reporting Person (See Instructions)
HC, IN
SCHEDULE 13G
Item 1.
(a)
Name of issuer:
Sun Country Airlines Holdings, Inc.
(b)
Address of issuer's principal executive offices:
2005 Cargo Road, Minneapolis, MN, 55450
Item 2.
(a)
Name of person filing:
This Schedule 13G is being jointly filed by Citadel Advisors LLC ("Citadel Advisors"), Citadel Advisors Holdings LP ("CAH"), Citadel GP LLC ("CGP"), Citadel Securities LLC ("Citadel Securities"), Citadel Securities Group LP ("CALC4"), Citadel Securities GP LLC ("CSGP") and Mr. Kenneth Griffin (collectively with Citadel Advisors, CAH, CGP, Citadel Securities, CALC4 and CSGP, the "Reporting Persons") with respect to the Shares of the above-named issuer owned by Citadel Multi-Strategy Equities Master Fund Ltd., a Cayman Islands company ("CM"), Citadel Securities, and CRBU Holdings LLC, a Delaware limited liability company ("CRBH"). Such owned Shares may include other instruments exercisable for or convertible into Shares.
Citadel Advisors is the portfolio manager for CM. CAH is the sole member of Citadel Advisors. CGP is the general partner of CAH. CALC4 is the non-member manager of Citadel Securities and CRBH. CSGP is the general partner of CALC4. Mr. Griffin is the President and Chief Executive Officer of CGP, and owns a controlling interest in CGP and CSGP.
The filing of this statement shall not be construed as an admission that any of the Reporting Persons is the beneficial owner of any securities covered by the statement other than the securities actually owned by such person (if any).
(b)
Address or principal business office or, if none, residence:
The address of each of the Reporting Persons is 830 Brickell Plaza, Miami, Florida 33131.
(c)
Citizenship:
Each of Citadel Advisors, CGP, Citadel Securities and CSGP is organized as a limited liability company under the laws of the State of Delaware. Each of CALC4 and CAH is organized as a limited partnership under the laws of the State of Delaware. Mr. Griffin is a U.S. citizen.
(d)
Title of class of securities:
Common Stock, par value $0.01 per share (the "Shares")
(e)
CUSIP No.:
866683105
Item 3.
If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)
Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)
Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)
Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)
Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)
An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)
An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)
A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)
A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)
A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)
A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J),
please specify the type of institution:
(k)
Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.
Ownership
(a)
Amount beneficially owned:
1. Each of Citadel Advisors LLC, Citadel Advisors Holdings LP and Citadel GP LLC may be deemed to beneficially own 1,315,590 Shares.
2. Citadel Securities LLC may be deemed to beneficially own 26,344 Shares.
3. Each of Citadel Securities Group LP and Citadel Securities GP LLC may be deemed to beneficially own 26,534 Shares.
4. Mr. Griffin may be deemed to beneficially own 1,342,124 Shares.
(b)
Percent of class:
1. The number of Shares that each of Citadel Advisors LLC, Citadel Advisors Holdings LP and Citadel GP LLC may be deemed to beneficially own constitutes 2.4% of the Shares outstanding.
2. The number of Shares that Citadel Securities LLC may be deemed to beneficially own constitutes 0.0% of the Shares outstanding.
3. The number of Shares that each of Citadel Securities Group LP and Citadel Securities GP LLC may be deemed to beneficially own constitutes 0.0% of the Shares outstanding.
4. The number of Shares that Mr. Griffin may be deemed to beneficially own constitutes 2.5% of the Shares outstanding.
(c)
Number of shares as to which the person has:
(i) Sole power to vote or to direct the vote:
1. Each of Citadel Advisors LLC, Citadel Advisors Holdings LP and Citadel GP LLC: 0
2. Citadel Securities LLC: 0
3. Each of Citadel Securities Group LP and Citadel Securities GP LLC: 0
4. Mr. Griffin: 0
(ii) Shared power to vote or to direct the vote:
1. Each of Citadel Advisors LLC, Citadel Advisors Holdings LP and Citadel GP LLC: 1,315,590
2. Citadel Securities LLC: 26,344
3. Each of Citadel Securities Group LP and Citadel Securities GP LLC: 26,534
4. Mr. Griffin: 1,342,124
(iii) Sole power to dispose or to direct the disposition of:
1. Each of Citadel Advisors LLC, Citadel Advisors Holdings LP and Citadel GP LLC: 0
2. Citadel Securities LLC: 0
3. Each of Citadel Securities Group LP and Citadel Securities GP LLC: 0
4. Mr. Griffin: 0
(iv) Shared power to dispose or to direct the disposition of:
1. Each of Citadel Advisors LLC, Citadel Advisors Holdings LP and Citadel GP LLC: 1,315,590
2. Citadel Securities LLC: 26,344
3. Each of Citadel Securities Group LP and Citadel Securities GP LLC: 26,534
4. Mr. Griffin: 1,342,124
Item 5.
Ownership of 5 Percent or Less of a Class.
Ownership of 5 percent or less of a class
Item 6.
Ownership of more than 5 Percent on Behalf of Another Person.
Not Applicable
Item 7.
Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
Not Applicable
Item 8.
Identification and Classification of Members of the Group.
Not Applicable
Item 9.
Notice of Dissolution of Group.
Not Applicable
Item 10.
Certifications:
By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11.
SIGNATURE
After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.
Citadel Advisors LLC
Signature:
/s/ Seth Levy
Name/Title:
Seth Levy, Authorized Signatory
Date:
05/15/2026
Citadel Advisors Holdings LP
Signature:
/s/ Seth Levy
Name/Title:
Seth Levy, Authorized Signatory
Date:
05/15/2026
Citadel GP LLC
Signature:
/s/ Seth Levy
Name/Title:
Seth Levy, Authorized Signatory
Date:
05/15/2026
Citadel Securities LLC
Signature:
/s/ Seth Levy
Name/Title:
Seth Levy, Authorized Signatory
Date:
05/15/2026
Citadel Securities Group LP
Signature:
/s/ Seth Levy
Name/Title:
Seth Levy, Authorized Signatory
Date:
05/15/2026
Citadel Securities GP LLC
Signature:
/s/ Seth Levy
Name/Title:
Seth Levy, Authorized Signatory
Date:
05/15/2026
Kenneth Griffin
Signature:
/s/ Seth Levy
Name/Title:
Seth Levy, attorney-in-fact*
Date:
05/15/2026
Comments accompanying signature: * Seth Levy is signing on behalf of Kenneth Griffin as attorney-in-fact pursuant to a power of attorney previously filed with the Securities and Exchange Commission, and hereby incorporated by reference herein. The power of attorney was filed as an attachment to a filing by Citadel Advisors LLC on Schedule 13G for Allakos Inc. on October 13, 2023.
