Alphatec Holdings, Inc. (ATEC) Ownership
ATEC ownership summary
as of October 17, 2026- Institutions
- 75.7% of shares outstanding
- Insiders
- 20.59% of shares outstanding
- Shares outstanding
- 154.5M
- Float
- 122.1M shares available to trade
- Short interest
- 10.52% 14.1M shares short
- Days to cover
- 6.13 short interest down 2.5% vs prior month
- Institutions 75.65%
- Insiders 20.59%
- Other investors 3.76%
ATEC top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | BlackRock Inc | 7.33% | 11.3M | $118.5M | +1.2M (+12.3%) | June 30, 2026 |
| 2 | BRAIDWELL LP | 4.23% | 6.5M | $68.3M | +4.4M (+200.6%) | June 30, 2026 |
| 3 | American Century Companies Inc | 4.22% | 6.5M | $68.2M | +96,882 (+1.5%) | June 30, 2026 |
| 4 | Vanguard Capital Management, LLC | 3.32% | 5.1M | $53.6M | +208,902 (+4.3%) | June 30, 2026 |
| 5 | BNP Paribas Investment Partners SA | 2.29% | 3.5M | $37.0M | −79,792 (−2.2%) | June 30, 2026 |
| 6 | State Street Corp | 2.25% | 3.5M | $36.4M | +450,185 (+14.9%) | June 30, 2026 |
| 7 | Jacobs Levy Equity Management, Inc. | 2.17% | 3.4M | $35.1M | +3.4M (0.0%) | June 30, 2026 |
| 8 | Geode Capital Management, LLC | 2.06% | 3.2M | $33.4M | +282,472 (+9.7%) | June 30, 2026 |
| 9 | Royal Bank of Canada | 1.94% | 3.0M | $31.3M | −1.5M (−33.7%) | June 30, 2026 |
| 10 | Nuveen, LLC | 1.68% | 2.6M | $27.2M | −247,813 (−8.7%) | June 30, 2026 |
| 11 | Tremblant Capital Group | 1.67% | 2.6M | $27.0M | +385,715 (+17.6%) | June 30, 2026 |
| 12 | Citadel Advisors Llc | 1.59% | 2.5M | $25.7M | +1.6M (+187.1%) | June 30, 2026 |
| 13 | AQR Capital Management LLC | 1.54% | 2.4M | $25.0M | +1.0M (+72.2%) | June 30, 2026 |
| 14 | Emerald Advisers, LLC | 1.36% | 2.1M | $22.0M | +297,144 (+16.4%) | June 30, 2026 |
| 15 | UBS Group AG | 1.31% | 2.0M | $21.1M | +74,138 (+3.8%) | June 30, 2026 |
| 16 | Arnhold & S. Bleichroeder Advisers, LLC | 1.29% | 2.0M | $20.8M | +1.3M (+186.1%) | June 30, 2026 |
| 17 | Bank of America Corp | 1.28% | 2.0M | $20.7M | −584,437 (−22.8%) | June 30, 2026 |
| 18 | Delaware Management Holdings Inc | 1.28% | 2.0M | $20.7M | +682,345 (+52.8%) | June 30, 2026 |
| 19 | HPM Partners LLC | 1.22% | 1.9M | $19.7M | +60,834 (+3.3%) | June 30, 2026 |
| 20 | The Goldman Sachs Group Inc | 1.07% | 1.7M | $17.3M | −89,794 (−5.1%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 15 holders added 15.4M shares and 5 cut 2.5M.
ATEC top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | American Century Small Cap Growth Inv | 3.17% | 4.9M | $51.3M | — | June 30, 2026 |
| 2 | Vanguard MStar Total Stk Mkt Idx Invest | 2.36% | 3.6M | $38.2M | — | August 31, 2026 |
| 3 | iShares Russell 2000 ETF | 2.07% | 3.2M | $33.5M | −36,864 (−1.1%) | September 30, 2026 |
| 4 | Vanguard Mid Cap Growth Inv | 1.43% | 2.2M | $23.1M | +319,640 (+16.9%) | June 30, 2026 |
| 5 | BNP Paribas US Small Cap ClassicC | 1.20% | 1.8M | $19.3M | −3,536 (−0.2%) | August 31, 2026 |
| 6 | BNP Paribas Health Cr Innovtr Cl Cap | 1.02% | 1.6M | $16.5M | −286 (−0.0%) | August 31, 2026 |
| 7 | Fidelity Small Cap Index | 0.88% | 1.4M | $14.1M | +9,380 (+0.7%) | July 31, 2026 |
| 8 | iShares Russell 2000 Growth ETF | 0.75% | 1.2M | $12.1M | −1,466 (−0.1%) | September 30, 2026 |
| 9 | Xtrackers S&P 500 Swap ETF 1C | 0.63% | 968K | $10.1M | +95,668 (+11.0%) | December 31, 2025 |
| 10 | Fidelity Enhanced Small Cap Core ETF | 0.57% | 888K | $9.3M | +1,860 (+0.2%) | September 30, 2026 |
| 11 | First Eagle Small Cap Opportunity I | 0.57% | 875K | $9.2M | — | August 31, 2026 |
| 12 | Bridge Builder Small/Mid Cap Value | 0.56% | 864K | $9.0M | +864,360 (0.0%) | September 30, 2026 |
| 13 | Vanguard Russell 2000 ETF | 0.46% | 713K | $7.5M | +16,188 (+2.3%) | August 31, 2026 |
| 14 | Emerald Growth A | 0.46% | 712K | $7.4M | +78,320 (+12.4%) | August 31, 2026 |
| 15 | Schwab US Small-Cap ETF™ | 0.44% | 679K | $7.1M | +459 (+0.1%) | September 30, 2026 |
| 16 | abrdn US Small Cap Equity Inst Svc | 0.44% | 674K | $7.1M | — | August 31, 2026 |
| 17 | abrdn-Nrth American Sml Comp I Acc USD | 0.41% | 634K | $6.6M | −3,816 (−0.6%) | August 31, 2026 |
| 18 | iShares US Medical Devices ETF | 0.41% | 629K | $6.6M | +11,016 (+1.8%) | September 30, 2026 |
| 19 | Fidelity Extended Market Index | 0.38% | 592K | $6.2M | +88 (+0.0%) | August 31, 2026 |
| 20 | Principal SmallCap Growth I Instl | 0.36% | 562K | $5.9M | +4,503 (+0.8%) | August 31, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
ATEC insider transactions
latest 20| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-03-13 | Scott Lish | Sell | $12.30 | 260,535 | $3.2M |
| 2026-03-11 | David Sponsel | Sell | $12.52 | 163,452 | $2.0M |
| 2026-03-09 | Craig E Hunsaker | Sell | $12.45 | 82,765 | $1.0M |
| 2026-03-06 | Craig E Hunsaker | Sell | $12.22 | 33,602 | $410,616 |
| 2026-03-05 | Tyson Eliot Marshall | Sell | $12.49 | 88,835 | $1.1M |
| 2026-02-05 | David Sponsel | Sell | $13.79 | 60,425 | $833,261 |
| 2026-02-03 | Craig E Hunsaker | Sell | $14.71 | 37,358 | $549,536 |
| 2026-01-05 | Patrick Miles | Sell | $21.01 | 100,000 | $2.1M |
| 2025-12-16 | David R Pelizzon | Sell | $19.66 | 250,000 | $4.9M |
| 2025-12-16 | Scott Lish | Sell | $19.64 | 19,900 | $390,836 |
| 2025-12-11 | David M Demski | Sell | $21.20 | 30,000 | $636,000 |
| 2025-12-10 | Craig E Hunsaker | Sell | $20.84 | 32,584 | $679,051 |
| 2025-12-10 | David Sponsel | Sell | $20.79 | 21,106 | $438,794 |
| 2025-12-09 | Squadron Capital Llc | Sell | $21.03 | 28,834 | $606,379 |
| 2025-12-09 | Jennifer N Pritzker | Sell | $21.03 | 28,834 | $606,379 |
| 2025-12-09 | David R Pelizzon | Sell | $21.03 | 28,834 | $606,379 |
| 2025-12-08 | Squadron Capital Llc | Sell | $21.20 | 221,166 | $4.7M |
| 2025-12-08 | David R Pelizzon | Sell | $21.20 | 221,166 | $4.7M |
| 2025-12-08 | David Sponsel | Sell | $21.45 | 988 | $21,193 |
| 2025-12-08 | Jennifer N Pritzker | Sell | $21.20 | 221,166 | $4.7M |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
ATEC shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns ATEC
Institutional investors own 75.7% of Alphatec's shares and insiders 20.59%. The largest holder is BlackRock Inc with 7.33% of the shares (11.3M), as of June 30, 2026. Among the top 20 institutions, 15 added shares and 5 reduced their stake in the latest filings. Short interest is 10.52% of the float, or 6.13 days of average trading volume. The share count rose 1,728.6% since 2014.
Related: ATEC analyst forecast, ATEC key metrics. See the ATEC stock overview for the latest quote and news.
ATEC ownership FAQ
Who owns the most Alphatec stock?
The largest shareholders of Alphatec are BlackRock Inc (7.33%), BRAIDWELL LP (4.23%), American Century Companies Inc (4.22%), Vanguard Capital Management, LLC (3.32%), BNP Paribas Investment Partners SA (2.29%).
What percentage of Alphatec is owned by institutions?
Institutions hold 75.7% of Alphatec's shares outstanding; insiders hold 20.59%.
Which funds own Alphatec?
The largest fund holders of Alphatec are American Century Small Cap Growth Inv (3.17%), Vanguard MStar Total Stk Mkt Idx Invest (2.36%), iShares Russell 2000 ETF (2.07%), Vanguard Mid Cap Growth Inv (1.43%), BNP Paribas US Small Cap ClassicC (1.20%).
What is Alphatec's short interest?
14.1M shares of Alphatec were sold short, 10.52% of the float; at the average daily volume it would take 6.13 days to cover.
Are insiders buying or selling Alphatec?
Of the latest 20 reported insider transactions in Alphatec (since December 8, 2025), 0 were purchases and 20 were sales.
How many shares of Alphatec are outstanding?
Alphatec has 154.5M shares outstanding, of which 122.1M are in the public float.