Does Citadel Advisors own ATEC stock?

Yes. As of its Q2 2026 13F, Citadel Advisors holds 2,461,400 shares of ATEC (Alphatec), worth $21.3M.

How many shares of ATEC does Citadel Advisors own?

As of its Q2 2026 13F, Citadel Advisors holds 2,461,400 shares of ATEC (Alphatec).

As of its Q2 2026 13F, Citadel Advisors' ATEC position is worth $21.3M.

In Q2 2026, Citadel Advisors increased its ATEC position by 1,604,061 shares (+187.1%).

Citadel Advisors first reported ATEC in its Q4 2019 13F and has listed it in 27 quarterly 13F filings.

Position history for CITADEL ADVISORS LLC's holdings in ALPHATEC HLDGS INC

Current Value

$21.3M

Current Shares

2.5M

Total Value Change

+$19.6M

Total Shares Change

+2.2M

Quarter-by-Quarter History

Quarter	Action	Shares	Change	Value	Weight	Price	Conviction
2026-Q2 Latest	Increased	2.5M	+187.1%	$21.3M	0.0%	$8.65	46
2026-Q1	Decreased	857,339	-35.9%	$9.3M	0.0%	$10.88	0
2025-Q4	Increased	1.3M	+623.4%	$28.1M	0.0%	$21.04	46
2025-Q3	Increased	184,892	+9.9%	$2.7M	0.0%	$14.54	29
2025-Q2	Decreased	168,153	-69.9%	$1.9M	0.0%	$11.10	0
2025-Q1	Increased	559,069	+419.3%	$5.7M	0.0%	$10.14	44
2024-Q4	Decreased	107,669	-37.6%	$988,401	0.0%	$9.18	0
2024-Q3	Decreased	172,542	-25.3%	$959,334	0.0%	$5.56	0
2024-Q2	Decreased	231,022	-85.7%	$2.4M	0.0%	$10.45	0
2024-Q1	Decreased	1.6M	-31.4%	$22.2M	0.0%	$13.79	0
2023-Q4	Increased	2.3M	+1699.8%	$35.5M	0.0%	$15.11	47
2023-Q3	Decreased	130,393	-53.6%	$1.7M	0.0%	$12.97	0
2023-Q2	Decreased	281,172	-75.2%	$5.1M	0.0%	$17.98	0
2023-Q1	Increased	1.1M	+26.9%	$17.7M	0.0%	$15.60	35
2022-Q4	Increased	893,924	+24.3%	$11M	0.0%	$12.35	34
2022-Q3	Decreased	719,125	-16.8%	$6.3M	0.0%	$8.74	0
2022-Q2	Increased	864,222	+49.0%	$5.7M	0.0%	$6.54	37
2022-Q1	Increased	580,016	+249.4%	$6.7M	0.0%	$11.50	44
2021-Q4	Increased	165,999	+90.2%	$1.9M	0.0%	$11.43	41
2021-Q3	Decreased	87,279	-73.7%	$1.1M	0.0%	$12.19	0
2021-Q2	Decreased	332,012	-9.8%	$5.1M	0.0%	$15.32	0
2021-Q1	Increased	368,002	+110.8%	$5.8M	0.0%	$15.79	44
2020-Q4	Increased	174,531	+87.6%	$2.5M	0.0%	$14.52	41
2020-Q3	Increased	93,014	+65.1%	$618,000	0.0%	$6.64	36
2020-Q2	Decreased	56,323	-56.3%	$265,000	0.0%	$4.70	0
2020-Q1	Decreased	128,753	-46.0%	$444,000	0.0%	$3.45	0
2019-Q4	New	238,302	-	$1.7M	0.0%	$7.10	36