Alphatec Holdings, Inc.

ATEC

Exchange: Nasdaq
Industry: Surgical & Medical Instruments & Apparatus
SEC CIK: 0001350653

SEC filings (opens in a new tab)

In the last 90 days, Alphatec Holdings, Inc. insiders filed 1 open-market purchase and 1 sale; 267 institutions reported holding it in 13F filings for Q2 2026, worth $966.6M in total; no superinvestor holds it.

Q4 2025 vs. Q3 2025

How the institutions holding Alphatec Holdings, Inc. changed between Q3 2025 and Q4 2025.

All holders in Q4 2025 All holders in Q3 2025

13F holders of ATEC: Q3 2025 compared with Q4 2025
Measure	Q3 2025	Of which not filed for Q4 2025	Q4 2025	Change
Holders	275	6	285	+16
Shares	108.2M	727.2K	119.4M	+11.9M (+11.1%)
Value	$1.57B	$10.6M	$2.51B	+$949.5M (+60.7%)

6 institutions that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so the changes leave them out.

New holders (44)

Institutions that held Alphatec Holdings, Inc. at the end of Q4 2025 but not at the end of Q3 2025.

Institutions new to ATEC in Q4 2025
Institution	Shares	Value	% of portfolio
Tremblant Capital Group	1,624,997	$34.2M	0.87%
Iron Triangle Partners LP	1,285,685	$27.1M	3.09%
Hood River Capital Management LLC	1,138,350	$24.0M	0.26%
Nomura Asset Management International Inc.	890,038	$18.7M	0.03%
M&G Plc	669,266	$14.1M	0.07%
Norges Bank	649,814	$13.7M	0.00%
Defilade Capital Management, L.P.	626,754	$13.2M	1.79%
Freestone Grove Partners LP	615,420	$12.9M	0.09%
Castleark Management LLC	296,160	$6.23M	0.18%
Arrowstreet Capital, Limited Partnership	250,675	$5.27M	0.00%
Pier Capital, LLC	229,807	$4.84M	0.77%
Universal- Beteiligungs- und Servicegesellschaft mbH	175,423	$3.69M	0.01%
Blackstone Group Inc.	161,900	$3.41M	0.01%
Jain Global LLC	75,511	$1.59M	0.02%
HRT Financial LP	68,430	$1.44M	0.00%
Fred Alger Management, LLC	58,817	$1.24M	0.00%
Susquehanna International Group, LLP	58,353	$1.23M	0.00%
Avid Wealth Partners LLC	58,129	$1.22M	0.60%
FirstWave Capital Management LLC	52,726	$1.11M	0.66%
Focused Alpha, LLC	40,220	$846.2K	0.25%
Numerai GP LLC	35,976	$756.9K	0.09%
Susquehanna Portfolio Strategies, LLC	32,375	$681.2K	0.01%
PEAK6 LLC	25,043	$526.9K	0.01%
Axq Capital, LP	20,955	$440.9K	0.10%
Fifth Lane Capital, LP	20,000	$420.8K	0.50%
Lighthouse Financial LLC	18,970	$399.1K	0.26%
Quantinno Capital Management LP	15,965	$335.9K	0.00%
Third View Private Wealth, LLC	15,921	$335.0K	0.05%
Voloridge Investment Management, LLC	15,242	$320.7K	0.00%
Mariner, LLC	14,943	$314.3K	0.00%
Cambridge Investment Research Advisors, Inc.	14,844	$312.0K	0.00%
M&T Bank Corp	12,636	$265.5K	0.00%
PharVision Advisers, LLC	12,179	$256.2K	0.13%
R Squared Ltd	10,482	$220.5K	0.10%
Merit Financial Group, LLC	9,848	$207.2K	0.00%
Brown Brothers Harriman & Co	1,000	$21.0K	0.00%
Quarry LP	917	$19.3K	0.00%
Elequin Capital LP	529	$11.1K	0.00%
Smartleaf Asset Management LLC	194	$4.05K	0.00%
Bare Financial Services, Inc	24	$505	0.00%
Keating Financial Advisory Services, Inc.	18	$379	0.00%
Godfrey Financial Associates, Inc.	15	$316	0.00%
SJS Investment Consulting Inc.	13	$274	0.00%
DV Trading LLC	7	$147	0.00%

Sold out (28)

Institutions that held Alphatec Holdings, Inc. at the end of Q3 2025 and filed for Q4 2025 without it.

Institutions that sold out of ATEC in Q4 2025
Institution	Shares, Q3 2025	Value, Q3 2025
Braidwell LP	1,514,604	$22.0M
Macquarie Group Ltd	809,350	$11.8M
Quantbot Technologies LP	184,041	$2.68M
ExodusPoint Capital Management, LP	171,714	$2.50M
Campbell & CO Investment Adviser LLC	46,709	$679.1K
Gsa Capital Partners LLP	43,072	$626.0K
Semanteon Capital Management, LP	38,490	$559.6K
Summit Wealth Group LLC	39,986	$518.6K
Omers Administration Corp	30,800	$447.8K
Marshall Wace, LLP	28,367	$412.5K
Capstone Investment Advisors, LLC	26,340	$383.0K
Prelude Capital Management, LLC	20,338	$295.7K
Man Group plc	19,459	$282.9K
Atom Investors LP	17,543	$255.1K
Teacher Retirement System of Texas	15,241	$221.6K
Aigen Investment Management, LP	13,672	$198.8K
Keebeck Alpha, LP	13,569	$197.3K
PKS Advisory Services, LLC	10,751	$156.3K
Wrapmanager Inc	10,741	$156.2K
Virginia Retirement Systems Et Al	10,300	$149.8K
Lee Financial Co	10,215	$148.5K
FNY Investment Advisers, LLC	5,090	$74.0K
Aster Capital Management (DIFC) Ltd	2,314	$33.6K
Clear Street Markets LLC	1,197	$17.4K
Caitong International Asset Management Co., Ltd	1,156	$16.8K
Osterweis Capital Management Inc	334	$4.86K
Walleye Trading LLC	318	$4.62K
Colony Group, LLC	9,461	–

Not filed for Q4 2025 yet (6)

Institutions that held Alphatec Holdings, Inc. at the end of Q3 2025 and haven't filed a 13F for Q4 2025. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding ATEC in Q3 2025 that haven't filed for Q4 2025
Institution	Shares, Q3 2025	Value, Q3 2025
Cubist Systematic Strategies, LLC	679,050	$9.87M
CIBC Bancorp USA Inc.	12,367	$179.8K
Point72 (DIFC) Ltd	11,547	$167.9K
Corton Capital Inc.	10,606	$154.2K
Shell Asset Management Co	9,132	$133.0K
Point72 Hong Kong Ltd	4,524	$65.8K