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ATEC in the 13F filings

Alphatec HLDGS Inc · CUSIP 02081G201

Sector · Medical devices and instrumentsTheme · Healthcare: biopharma and medtech· L3VLUP-definedTheme · Surgical, medical and electromedical devices
Quarter
Q2 2026Q1 2026Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023Q3 2023
Quarter end
30 Jun 2026
the date the book describes
Filed
27 Oct 2026
latest of these filings; the earliest 3 Aug 2026
Managers listing it
26
at least, of 95 tracked, among listed positions
Comparable managers
91
filed both Q1 2026 and Q2 2026; 3 listed it in both
Shares listed
13,891,673
combined, among listed positions
Reported value
$120m
combined, at the quarter end

AllianceBernstein LP. Values in this filing are at the previous quarter end's prices; its share count is the quarter end's.

Among the 91 comparable managers: 14 buyers (opened or added shares) and 15 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was -2,113,466.

Managers listing ATEC in Q2 2026

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q1 2026, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

26 of 26 holders

ActionFiling
Citadel Advisors LLC2,461,400$21munder 0.1%Added+1,604,0612 Sep 2026 (the filing on sec.gov)
AQR Capital Management LLC2,386,326$21munder 0.1%Added+1,000,70314 Aug 2026 (the filing on sec.gov)
Arrowstreet Capital LP1,564,766$14munder 0.1%Added+1,057,74913 Aug 2026 (the filing on sec.gov)
Freestone Grove Partners LP1,173,065$10m0.07%Newnew14 Aug 2026 (the filing on sec.gov)
Millennium Management LLC1,145,837$9.9munder 0.1%Trimmed-1,663,70814 Aug 2026 (the filing on sec.gov)
First Eagle Investment Management LLC996,637$8.6munder 0.1%Added+300,0005 Aug 2026 (the filing on sec.gov)
Fidelity (FMR LLC)925,732$8.0munder 0.1%Added+638,28613 Aug 2026 (the filing on sec.gov)
Two Sigma Investments LP823,496$7.1munder 0.1%Trimmed-1,219,34714 Aug 2026 (the filing on sec.gov)
PDT Partners LLC387,592$3.4m0.18%Trimmed-13,30014 Aug 2026 (the filing on sec.gov)
Squarepoint Ops LLC326,548$2.8munder 0.1%Trimmed-280,57014 Aug 2026 (the filing on sec.gov)
Renaissance Technologies LLC284,500$2.5munder 0.1%Trimmed-770,60013 Aug 2026 (the filing on sec.gov)
Tudor Investment Corp270,709$2.3munder 0.1%Added+4,16014 Aug 2026 (the filing on sec.gov)
Moore Capital Management LP188,504$1.6munder 0.1%Newnew14 Aug 2026 (the filing on sec.gov)
Schonfeld Strategic Advisors LLC167,390$1.4munder 0.1%Trimmed-598,99314 Aug 2026 (the filing on sec.gov)
ExodusPoint Capital Management LP161,715$1.4munder 0.1%Newnew14 Aug 2026 (the filing on sec.gov)
AllianceBernstein LP125,130$1.4munder 0.1%Held014 Aug 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc155,465$1.3munder 0.1%Added+35,99414 Aug 2026 (the filing on sec.gov)
Invesco Ltd82,831$716kunder 0.1%Added+13,87914 Aug 2026 (the filing on sec.gov)
Acadian Asset Management LLC50,455$433kunder 0.1%Trimmed-76,31513 Aug 2026 (the filing on sec.gov)
Janus Henderson Group Ltd49,743$430kunder 0.1%Held014 Aug 2026 (the filing on sec.gov)
Man Group PLC44,125$382kunder 0.1%Added+25,15414 Aug 2026 (the filing on sec.gov)
Brevan Howard Capital Management LP36,601$317kunder 0.1%Trimmed-108,10214 Aug 2026 (the filing on sec.gov)
Jane Street Group LLC26,385$228kunder 0.1%Trimmed-852,16414 Aug 2026 (the filing on sec.gov)
Susquehanna International Group LLP23,905$207kunder 0.1%Trimmed-43,67814 Aug 2026 (the filing on sec.gov)
Quantbot Technologies LP19,796$171kunder 0.1%Newnew12 Aug 2026 (the filing on sec.gov)
Page 1 of 2

Largest increases and reductions, by shares

Q1 2026 to Q2 2026, among managers that listed it in both quarters or opened it.

Increases

Reductions

New positions and exits

At least these many: a manager is shown exiting only where its own filing shows the position gone.

New (5)

Exited (5)

Ownership over time

Every quarter on file. A quarter-end value moves with the price as well as with the shares held; buyers and sellers count comparable managers, by shares.
2 in Q3 2024 to 4 in Q2 2026

Tracked managers listing it, at least.

024682020202120222023202420252026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
ATEC by quarter
QuarterHoldersReported valueBuyersSellers
Q3 20191$1.2mn.a.n.a.
Q1 20201$100kn.a.n.a.
Q4 20201$22mn.a.n.a.
Q1 20212$11mn.a.n.a.
Q2 20211$1.2mn.a.n.a.
Q3 20212$40mn.a.n.a.
Q4 20212$16mn.a.n.a.
Q1 20221$4.0mn.a.n.a.
Q2 20221$2.3mn.a.n.a.
Q3 20221$4.1mn.a.n.a.
Q4 20221$9.0mn.a.n.a.
Q1 20233$23mn.a.n.a.
Q2 20236$79mn.a.n.a.
Q3 20232$22mn.a.n.a.
Q4 20234$89m40
Q1 20244$49m21
Q2 20245$65m50
Q3 20242$9.4m11
Q4 20242$17m11
Q1 20253$20m31
Q2 20254$26m22
Q3 20256$62m41
Q4 20258$165m1614
Q1 20263$20m1610
Q2 20264$24m1415

Compare with…

Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.

ATEC and LLY →ATEC and JNJ →ATEC and VRTX →Choose a stock to compare with ATEC →

How much of the picture this is

A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.

Which funds own ATEC, latest filings →Back to the 13F Explorer →