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Institutional ownership intelligence
Schedule 13G/A

SNCY Schedule 13G/A filing by Citadel Advisors

Citadel Advisors reported beneficial ownership of 2.7M shares, representing 5.1% of SUN COUNTRY AIRLINES HOLDING in this filing.

FiledFeb 17, 2026
Ownership dateDec 31, 2025
Reported shares2.7M
Reported ownership5.1%
Ownership details

Voting and dispositive power reported in the filing

These figures describe the reporting filer’s disclosed voting and investment authority. They should be read together with the reported share count and percentage.

Sole voting power 0
Shared voting power 2.7M
Sole dispositive power 0
Shared dispositive power 2.7M
Compared with the prior filing

How the reported position changed

This compares the current filing with the previous tracked Schedule 13 filing from the same reporting CIK for SNCY. A change between filings does not by itself establish when shares were bought or sold.

Previous filingFeb 19, 2025
Reported share change-510,921
Ownership percentage change-1 pts
Previous filingThis filing
Reported shares3.2M2.7M
Reported ownership6.1%5.1%
Source

Original filing and accession

Use the SEC filing as the primary source when you need the complete disclosure, footnotes, exhibits, or reporting-person details.

Reporting filer
Citadel Advisors
CIK
CIK0001423053
Accession
0001104659-26-016501
Form
Schedule 13G/A
Read the filing in context

Understand what a Schedule 13 filing does—and does not—tell you.