Alphatec Holdings, Inc.
US ˙ NasdaqGS ˙ US02081G2012

SecurityATEC / Alphatec Holdings, Inc.
InstitutionSquarepoint Ops LLC
Latest Disclosed Ownership607,118 shares
Latest Disclosed Value $ 6,605,444
Squarepoint Ops LLC reports 61.40% increase in ownership of ATEC / Alphatec Holdings, Inc.

On May 15, 2026 - Squarepoint Ops LLC filed a 13F-HR form disclosing ownership of 607,118 shares of Alphatec Holdings, Inc. (US:ATEC) valued at $6,605,444 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 376,158 shares of Alphatec Holdings, Inc.. This represents a change in shares of 61.40% during the quarter. The current value of the position is $4,662,666 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F ALPHATEC HLDGS COM NEW 02081G201 607,118 230,960 61.40 6,605 -16.54 0.0078
2026-02-13 2025-12-31 13F ALPHATEC HLDGS COM NEW 02081G201 376,158 -217,758 -36.66 7,914 -8.35
2025-11-14 2025-09-30 13F ALPHATEC HLDGS COM NEW 02081G201 593,916 354,046 147.60 8,636 224.38 0.0087
2025-08-27 2025-06-30 13F/A-1 ALPHATEC HLDGS COM NEW 02081G201 239,870 46,349 23.95 2,663 35.68 0.0028
2025-08-14 2025-06-30 13F ALPHATEC HLDGS COM NEW 02081G201 239,870 46,349 2,663 0.0028
2025-08-27 2025-03-31 13F/A-1 ALPHATEC HLDGS COM NEW 02081G201 193,521 142,562 279.76 1,962 320.13 0.0024
2025-05-15 2025-03-31 13F ALPHATEC HLDGS COM NEW 02081G201 193,521 142,562 1,962 0.0024
2025-02-14 2024-12-31 13F ALPHATEC HLDGS COM NEW 02081G201 50,959 -412,342 -89.00 468 -81.86 0.0005
2024-11-14 2024-09-30 13F ALPHATEC HLDGS COM NEW 02081G201 463,301 192,660 71.19 2,576 -8.95 0.0040
2024-08-14 2024-06-30 13F ALPHATEC HLDGS COM NEW 02081G201 270,641 -582,043 -68.26 2,828 -75.95 0.0047
2024-05-15 2024-03-31 13F ALPHATEC HLDGS COM NEW 02081G201 852,684 267,488 45.71 11,759 32.98 0.0202
2024-02-14 2023-12-31 13F ALPHATEC HLDGS COM NEW 02081G201 585,196 108,617 22.79 8,842 43.05 0.0167
2023-11-14 2023-09-30 13F ALPHATEC HLDGS COM NEW 02081G201 476,579 302,659 174.02 6,181 97.67 0.0153
2023-08-14 2023-06-30 13F ALPHATEC HLDGS COM NEW 02081G201 173,920 6,439 3.84 3,127 19.72 0.0096
2023-05-15 2023-03-31 13F ALPHATEC HLDGS COM NEW 02081G201 167,481 -51,274 -23.44 2,613 -3.30 0.0106
2023-02-14 2022-12-31 13F ALPHATEC HLDGS COM NEW 02081G201 218,755 1,251 0.58 2,702 42.08 0.0107
2022-11-14 2022-09-30 13F ALPHATEC HLDGS COM NEW 02081G201 217,504 -151,665 -41.08 1,901 -21.25 0.0096
2022-08-15 2022-06-30 13F ALPHATEC HLDGS COM NEW 02081G201 369,169 98,646 36.46 2,414 -22.40 0.0134
2022-05-16 2022-03-31 13F ALPHATEC HLDGS COM NEW 02081G201 270,523 127,111 88.63 3,111 89.81 0.0133
2022-02-14 2021-12-31 13F ALPHATEC HLDGS COM NEW 02081G201 143,412 195 0.14 1,639 -6.13 0.0043
2021-11-15 2021-09-30 13F ALPHATEC HLDGS COM NEW 02081G201 143,217 59,491 71.05 1,746 36.09 0.0050
2021-08-16 2021-06-30 13F ALPHATEC HLDGS COM NEW 02081G201 83,726 6,401 8.28 1,283 5.08 0.0049
2021-05-17 2021-03-31 13F ALPHATEC HLDGS COM NEW 02081G201 77,325 -7,748 -9.11 1,221 -1.13 0.0072
2021-02-16 2020-12-31 13F ALPHATEC HLDGS COM NEW 02081G201 85,073 47,735 127.85 1,235 397.98 0.0092
2020-11-16 2020-09-30 13F ALPHATEC HLDGS COM NEW 02081G201 37,338 -22,853 -37.97 248 -12.37 0.0033
2020-08-14 2020-06-30 13F ALPHATEC HLDGS COM NEW 02081G201 60,191 27,736 85.46 283 152.68 0.0046
2020-05-15 2020-03-31 13F ALPHATEC HLDGS COM NEW 02081G201 32,455 32,455 112 0.0029
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.