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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 Dec 2025
the date the book describes
Filed
19 Feb 2026
latest of these filings; the earliest 4 Feb 2026
Managers listing it
28
at least, of 95 tracked, among listed positions
Comparable managers
92
filed both Q3 2025 and Q4 2025; 5 listed it in both
Shares listed
16,900,005
combined, among listed positions
Reported value
$356m
combined, at the quarter end

Among the 92 comparable managers: 16 buyers (opened or added shares) and 14 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was +4,937,971.

Managers listing ATEC in Q4 2025

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q3 2025, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

28 of 28 holders

ActionFiling
Millennium Management LLC2,225,927$47munder 0.1%Added+1,658,34917 Feb 2026 (the filing on sec.gov)
Two Sigma Investments LP1,968,209$41m0.06%Added+173,88517 Feb 2026 (the filing on sec.gov)
Two Sigma Advisers LP1,635,100$34m0.07%Added+379,60017 Feb 2026 (the filing on sec.gov)
Walleye Capital LLC1,561,347$33m0.10%Trimmed-122,12113 Feb 2026 (the filing on sec.gov)
Citadel Advisors LLC1,337,565$28munder 0.1%Added+1,152,67317 Feb 2026 (the filing on sec.gov)
Point72 Asset Management LP1,099,884$23munder 0.1%Added+949,54517 Feb 2026 (the filing on sec.gov)
Tudor Investment Corp887,803$19munder 0.1%Trimmed-12,68817 Feb 2026 (the filing on sec.gov)
Renaissance Technologies LLC870,131$18munder 0.1%Trimmed-108,86912 Feb 2026 (the filing on sec.gov)
First Eagle Investment Management LLC676,137$14munder 0.1%Trimmed-22,0004 Feb 2026 (the filing on sec.gov)
Freestone Grove Partners LP615,420$13m0.09%Newnew17 Feb 2026 (the filing on sec.gov)
AQR Capital Management LLC604,088$13munder 0.1%Trimmed-4,54517 Feb 2026 (the filing on sec.gov)
Jane Street Group LLC577,210$12munder 0.1%Added+175,95312 Feb 2026 (the filing on sec.gov)
Fidelity (FMR LLC)480,632$10munder 0.1%Added+288,20917 Feb 2026 (the filing on sec.gov)
PDT Partners LLC400,892$8.4m0.55%Held017 Feb 2026 (the filing on sec.gov)
Squarepoint Ops LLC376,158$7.9munder 0.1%Trimmed-217,75813 Feb 2026 (the filing on sec.gov)
Invesco Ltd317,143$6.7munder 0.1%Trimmed-45,16319 Feb 2026 (the filing on sec.gov)
D. E. Shaw & Co.270,113$5.7munder 0.1%Added+255,98517 Feb 2026 (the filing on sec.gov)
Arrowstreet Capital LP250,675$5.3munder 0.1%Newnew13 Feb 2026 (the filing on sec.gov)
Verition Fund Management LLC140,355$3.0munder 0.1%Added+11,42613 Feb 2026 (the filing on sec.gov)
Schonfeld Strategic Advisors LLC125,816$2.6munder 0.1%Trimmed-32,14717 Feb 2026 (the filing on sec.gov)
AllianceBernstein LP125,130$2.6munder 0.1%Held017 Feb 2026 (the filing on sec.gov)
Polen Capital Management LLC95,761$2.0munder 0.1%Added+44,06112 Feb 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc93,651$2.0munder 0.1%Added+6,65417 Feb 2026 (the filing on sec.gov)
Susquehanna International Group LLP58,353$1.2munder 0.1%Newnew17 Feb 2026 (the filing on sec.gov)
Janus Henderson Group Ltd49,743$1.0munder 0.1%Trimmed-52,07217 Feb 2026 (the filing on sec.gov)
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Largest increases and reductions, by shares

Q3 2025 to Q4 2025, 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 (4)

Exited (4)

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 →