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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
31 Mar 2026
the date the book describes
Filed
18 May 2026
latest of these filings; the earliest 12 May 2026
Managers listing it
26
at least, of 95 tracked, among listed positions
Comparable managers
91
filed both Q4 2025 and Q1 2026; 5 listed it in both
Shares listed
16,005,139
combined, among listed positions
Reported value
$175m
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: 16 buyers (opened or added shares) and 10 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was +740,234.

Managers listing ATEC in Q1 2026

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q4 2025, 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
Millennium Management LLC2,809,545$31munder 0.1%Added+583,61815 May 2026 (the filing on sec.gov)
Point72 Asset Management LP2,493,575$27munder 0.1%Added+1,393,69115 May 2026 (the filing on sec.gov)
Two Sigma Investments LP2,042,843$22munder 0.1%Added+74,63415 May 2026 (the filing on sec.gov)
AQR Capital Management LLC1,385,623$15munder 0.1%Added+781,53515 May 2026 (the filing on sec.gov)
Renaissance Technologies LLC1,055,100$11munder 0.1%Added+184,96914 May 2026 (the filing on sec.gov)
Jane Street Group LLC878,549$9.6munder 0.1%Added+301,33912 May 2026 (the filing on sec.gov)
Citadel Advisors LLC857,339$9.3munder 0.1%Trimmed-480,22615 May 2026 (the filing on sec.gov)
Schonfeld Strategic Advisors LLC766,383$8.3m0.06%Added+640,56715 May 2026 (the filing on sec.gov)
First Eagle Investment Management LLC696,637$7.6munder 0.1%Added+20,50014 May 2026 (the filing on sec.gov)
Squarepoint Ops LLC607,118$6.6munder 0.1%Added+230,96015 May 2026 (the filing on sec.gov)
Arrowstreet Capital LP507,017$5.5munder 0.1%Added+256,34214 May 2026 (the filing on sec.gov)
PDT Partners LLC400,892$4.4m0.26%Held015 May 2026 (the filing on sec.gov)
Fidelity (FMR LLC)287,446$3.1munder 0.1%Trimmed-193,18615 May 2026 (the filing on sec.gov)
Tudor Investment Corp266,549$2.9munder 0.1%Trimmed-621,25415 May 2026 (the filing on sec.gov)
AllianceBernstein LP125,130$2.6munder 0.1%Held015 May 2026 (the filing on sec.gov)
Brevan Howard Capital Management LP144,703$1.6munder 0.1%Added+110,90715 May 2026 (the filing on sec.gov)
Walleye Capital LLC134,800$1.5munder 0.1%Trimmed-1,426,54713 May 2026 (the filing on sec.gov)
Acadian Asset Management LLC126,770$1.4munder 0.1%Added+119,04613 May 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc119,471$1.3munder 0.1%Added+25,82015 May 2026 (the filing on sec.gov)
Invesco Ltd68,952$750kunder 0.1%Trimmed-248,19112 May 2026 (the filing on sec.gov)
Susquehanna International Group LLP67,583$735kunder 0.1%Added+9,23015 May 2026 (the filing on sec.gov)
Verition Fund Management LLC50,415$549kunder 0.1%Trimmed-89,94015 May 2026 (the filing on sec.gov)
Janus Henderson Group Ltd49,743$541kunder 0.1%Held018 May 2026 (the filing on sec.gov)
Marshall Wace LLP25,463$277kunder 0.1%Newnew15 May 2026 (the filing on sec.gov)
Man Group PLC18,971$206kunder 0.1%Newnew15 May 2026 (the filing on sec.gov)
Page 1 of 2

Largest increases and reductions, by shares

Q4 2025 to Q1 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 (2)

Exited (3)

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 →