FRONTIER CAPITAL MANAGEMENT CO LLC

Position in ALK — Alaska Air Group, Inc.

CIK 351173 Boston, MA

Position in ALK

as of Mar 31, 2026 · filed May 15, 2026 Compact

Position Value

$124,080,529

+$9,357,698 QoQ

Shares Held

3,373,587

+47.9% QoQ

Ownership

3.03%

of shares outstanding

% of Portfolio

1.28%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2020

25 quarters on record

Voting authority Sole 43.076642161592396.ToString("F0")% Shared 0.ToString("F0")% None 56.923357838407604.ToString("F0")%

Industrials · as of Mar 31, 2026

FRONTIER CAPITAL MANAGEMENT CO LLC holds $182,455,809 across 3 Airlines names. ALK ranks #1 (68.0% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	ALK	Alaska Air Group, Inc. This page	3,373,587	$124,080,529
2	ALGT	Allegiant Travel CO	601,215	$48,722,463
3	SNCY	Sun Country Airlines Holdings, LLC	584,311	$9,652,817

25 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$124,080,529	3,373,587	+47.9%	Shares	Sole	2026-05-15
2025-12-31	$114,722,831	2,280,772	+27.5%	Shares	Sole	2026-02-17
2025-09-30	$89,057,415	1,789,020	+77.3%	Shares	Sole	2025-11-14
2025-06-30	$49,941,005	1,009,317	+78.4%	Shares	Sole	2025-08-14
2025-03-31	$27,845,968	565,745	-42.2%	Shares	Sole	2025-05-15
2024-12-31	$63,373,285	978,738	-17.0%	Shares	Sole	2025-02-14
2024-09-30	$53,339,119	1,179,808	-19.0%	Shares	Sole	2024-11-14
2024-06-30	$58,875,283	1,457,309	+9.0%	Shares	Sole	2024-08-14
2024-03-31	$57,496,029	1,337,428	+53.9%	Shares	Sole	2024-05-15
2023-12-31	$33,953,588	869,045	+238.8%	Shares	Sole	2024-02-14
2023-09-30	$9,509,907	256,470	+13.3%	Shares	Sole	2023-11-14
2023-06-30	$12,041,121	226,422	-1.0%	Shares	Sole	2023-08-14
2023-03-31	$9,597,888	228,739	-0.5%	Shares	Sole	2023-05-15
2022-12-31	$9,875,040	229,973	-0.3%	Shares	Sole	2023-02-14
2022-09-30	$9,030,025	230,652	+8.7%	Shares	Sole	2022-11-14
2022-06-30	$8,496,807	212,155	+12.7%	Shares	Sole	2022-07-20
2022-03-31	$10,918,758	188,222	-0.4%	Shares	Sole	2022-04-14
2021-12-31	$9,842,367	188,913	-1.4%	Shares	Sole	2022-01-19
2021-09-30	$11,226,002	191,570	-2.6%	Shares	Sole	2021-10-19
2021-06-30	$11,865,027	196,734	+5.6%	Shares	Sole	2021-08-09
2021-03-31	$12,897,698	186,356	+63.9%	Shares	Sole	2021-05-13
2020-12-31	$5,911,828	113,689	-11.2%	Shares	Sole	2021-01-19
2020-09-30	$4,687,357	127,965	-7.8%	Shares	Sole	2020-11-16
2020-06-30	$5,033,141	138,807	-10.3%	Shares	Sole	2020-07-17
2020-03-31	$4,406,501	154,777	—	Shares	Sole	2020-04-16
No filing history on record for this holder in this stock.