Alphatec Holdings, Inc.
US ˙ NasdaqGS ˙ US02081G2012

SecurityATEC / Alphatec Holdings, Inc.
InstitutionDriehaus Capital Management Llc
Latest Disclosed Ownership0 shares
Latest Disclosed Value $ 0
Driehaus Capital Management Llc closes position in ATEC / Alphatec Holdings, Inc.

On May 15, 2026 - Driehaus Capital Management Llc filed a 13F-HR form disclosing ownership of 0 shares of Alphatec Holdings, Inc. (US:ATEC) valued at $0 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 2,858,771 shares of Alphatec Holdings, Inc.. The current value of the position is $0 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 Holdings COM 02081G201 0 -100.00 0
2026-02-17 2025-12-31 13F Alphatec Holdings COM 02081G201 2,858,771 1,449,158 102.81 60,149 193.48 0.4086
2025-11-14 2025-09-30 13F ALPHATEC HOLDINGS COM 02081G201 1,409,613 -44,143 -3.04 20,496 27.01 0.1468
2025-08-14 2025-06-30 13F ALPHATEC HOLDINGS COM 02081G201 1,453,756 428,307 41.77 16,137 55.18 0.1291
2025-05-15 2025-03-31 13F ALPHATEC HOLDINGS COM 02081G201 1,025,449 1,025,449 10,398 0.1002
2024-11-14 2024-09-30 13F ALPHATEC HOLDINGS COM 02081G201 0 -456,835 -100.00 0 -100.00
2024-08-15 2024-06-30 13F/A-1 ALPHATEC HOLDINGS COM 02081G201 456,835 -2,182,315 -82.69 4,774 -86.88 0.0462
2024-08-14 2024-06-30 13F ALPHATEC HOLDINGS COM 02081G201 456,835 -2,182,315 4,774 0.0460
2024-05-15 2024-03-31 13F ALPHATEC HOLDINGS COM 02081G201 2,639,150 33,031 1.27 36,394 -7.58 0.3626
2024-02-14 2023-12-31 13F ALPHATEC HOLDINGS COM 02081G201 2,606,119 79,312 3.14 39,378 20.16 0.4744
2023-11-14 2023-09-30 13F ALPHATEC HOLDINGS COM 02081G201 2,526,807 -234,306 -8.49 32,773 -33.99 0.4260
2023-08-14 2023-06-30 13F ALPHATEC HOLDINGS COM 02081G201 2,761,113 1,467,700 113.47 49,645 146.04 0.6268
2023-05-15 2023-03-31 13F ALPHATEC HOLDINGS COM 02081G201 1,293,413 -30,094 -2.27 20,177 23.44 0.2832
2023-02-14 2022-12-31 13F ALPHATEC HOLDINGS COM 02081G201 1,323,507 -17,698 -1.32 16,345 39.44 0.2437
2022-11-14 2022-09-30 13F ALPHATEC HOLDINGS COM 02081G201 1,341,205 -34,296 -2.49 11,722 30.30 0.1775
2022-08-15 2022-06-30 13F ALPHATEC HOLDINGS COM 02081G201 1,375,501 238,480 20.97 8,996 -31.20 0.1457
2022-05-16 2022-03-31 13F ALPHATEC HOLDINGS COM 02081G201 1,137,021 -21,840 -1.88 13,076 -1.28 0.1606
2022-02-14 2021-12-31 13F ALPHATEC HOLDINGS COM 02081G201 1,158,861 -663,298 -36.40 13,246 -40.37 0.1352
2021-11-15 2021-09-30 13F ALPHATEC HOLDINGS COM 02081G201 1,822,159 -74,722 -3.94 22,212 -23.57 0.2634
2021-08-16 2021-06-30 13F ALPHATEC HOLDINGS COM 02081G201 1,896,881 34,608 1.86 29,060 -1.17 0.3851
2021-05-17 2021-03-31 13F ALPHATEC HOLDINGS COM 02081G201 1,862,273 -114,353 -5.79 29,405 2.45 0.4338
2021-02-16 2020-12-31 13F ALPHATEC HOLDINGS COM 02081G201 1,976,626 205,988 11.63 28,701 144.12 0.4637
2020-11-16 2020-09-30 13F ALPHATEC HOLDINGS COM 02081G201 1,770,638 -39,123 -2.16 11,757 38.22 0.2413
2020-08-14 2020-06-30 13F ALPHATEC HOLDINGS COM 02081G201 1,809,761 -81,963 -4.33 8,506 30.34 0.2069
2020-05-15 2020-03-31 13F ALPHATEC HOLDINGS COM 02081G201 1,891,724 151,295 8.69 6,526 -47.15 0.2180
2020-02-12 2019-12-31 13F ALPHATEC HOLDINGS COM 02081G201 1,740,429 -158,738 -8.36 12,348 29.52 0.3284
2019-11-14 2019-09-30 13F ALPHATEC HOLDINGS COM 02081G201 1,899,167 1,899,167 9,534 0.3102
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.