ALPHATEC HOLDINGS INC (ATEC) Institutional Ownership Changes & 13F Activity
ALPHATEC HOLDINGS INC (ATEC). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings (Q2 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions in the latest reporting period. Notable filers include Braidwell Lp, Jacobs Levy Equity Management, Inc, Millennium Management Llc, Citadel Advisors Llc, and Royal Bank Of Canada.
| Institution | Type | Change in shares | Change Position % | Shares | Reported stock balance | Portfolio quarter | Filing date |
|---|---|---|---|---|---|---|---|
| Envestnet Asset Management Inc | Sell | -41,416 | -28.2% | 105,631 | $913.70K | Q2 2026 | Sep 23, 2026 |
| State Street Corp | Buy | +450,185 | +14.9% | 3,481,349 | $30.11M | Q2 2026 | Sep 22, 2026 |
| Manufacturers Life Insurance Company, The | Buy | +4,701 | +7.5% | 67,093 | $580.35K | Q2 2026 | Sep 09, 2026 |
| Citadel Advisors Llc | Buy | +1,604,061 | +187.1% | 2,461,400 | $21.29M | Q2 2026 | Sep 02, 2026 |
| First Eagle U.S. Value | Buy | +300,000 | +43.1% | 996,637 | $8.62M | Q2 2026 | Aug 24, 2026 |
| California State Teachers Retirement System | Sell | -3,678 | -2.5% | 143,972 | $1.25M | Q2 2026 | Aug 24, 2026 |
| Assenagon Asset Management S.A. | Sell | -95,643 | -37.2% | 161,238 | $1.39M | Q2 2026 | Aug 21, 2026 |
| Mercer Global Advisors Inc | Sell | -187,735 | -61.5% | 117,383 | $1.02M | Q2 2026 | Aug 19, 2026 |
| Pure Financial Advisors, Llc | Sell | -1,433 | -5.7% | 23,847 | $206.28K | Q2 2026 | Aug 17, 2026 |
| Transamerica Financial Advisors, Llc | Buy | +7 | — | 7 | $60.00 | Q2 2026 | Aug 17, 2026 |
| Braidwell Lp | Buy | +4,358,714 | +200.6% | 6,531,439 | $56.50M | Q2 2026 | Aug 14, 2026 |
| Jacobs Levy Equity Management, Inc | Buy | +3,352,133 | — | 3,352,133 | $29.00M | Q2 2026 | Aug 14, 2026 |
| Millennium Management Llc | Sell | -1,663,708 | -59.2% | 1,145,837 | $9.91M | Q2 2026 | Aug 14, 2026 |
| Royal Bank Of Canada | Sell | -1,521,182 | -33.7% | 2,995,410 | $25.91M | Q2 2026 | Aug 14, 2026 |
| Metlife Investment Management, Llc | Sell | -1,255,303 | -94.5% | 72,540 | $627.47K | Q2 2026 | Aug 14, 2026 |
| Two Sigma Investments, Lp | Sell | -1,219,347 | -59.7% | 823,496 | $7.12M | Q2 2026 | Aug 14, 2026 |
| Freestone Grove Partners Lp | Buy | +1,173,065 | — | 1,173,065 | $10.15M | Q2 2026 | Aug 14, 2026 |
| Aqr Capital Management Llc | Buy | +1,000,703 | +72.2% | 2,386,326 | $20.64M | Q2 2026 | Aug 14, 2026 |
| Jane Street Group, Llc | Sell | -852,164 | -97.0% | 26,385 | $228.23K | Q2 2026 | Aug 14, 2026 |
| Qube Research & Technologies Ltd | Sell | -741,996 | -93.3% | 53,582 | $463.48K | Q2 2026 | Aug 14, 2026 |
| Nomura Asset Management International Inc. | Buy | +682,345 | +52.8% | 1,974,452 | $17.08M | Q2 2026 | Aug 14, 2026 |
| Raymond James Financial Inc | Buy | +634,027 | +63.1% | 1,639,330 | $14.18M | Q2 2026 | Aug 14, 2026 |
| Schonfeld Strategic Advisors Llc | Sell | -598,993 | -78.2% | 167,390 | $1.45M | Q2 2026 | Aug 14, 2026 |
| Bank Of America Corp | Sell | -584,437 | -22.8% | 1,976,534 | $17.10M | Q2 2026 | Aug 14, 2026 |
| Susquehanna Portfolio Strategies, Llc | Buy | +430,767 | +243.6% | 607,576 | $5.26M | Q2 2026 | Aug 14, 2026 |
| Tremblant Capital Group | Buy | +385,715 | +17.6% | 2,577,799 | $22.30M | Q2 2026 | Aug 14, 2026 |
| Parkman Healthcare Partners Llc | Sell | -373,820 | -45.4% | 449,943 | $3.89M | Q2 2026 | Aug 14, 2026 |
| Divisadero Street Capital Management, Lp | Buy | +283,953 | — | 283,953 | $2.46M | Q2 2026 | Aug 14, 2026 |
| Squarepoint Ops Llc | Sell | -280,570 | -46.2% | 326,548 | $2.82M | Q2 2026 | Aug 14, 2026 |
| Sei Investments Co | Sell | -270,875 | -45.3% | 327,128 | $2.83M | Q2 2026 | Aug 14, 2026 |
Frequently asked questions about ATEC activity
Which institutional owners are buying ATEC?
Institutional owners buying ATEC include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.
What does "buy" mean in ATEC activity?
"Buy" means an investor increased their reported position in ATEC compared to the prior reporting period. This reflects growing exposure to ALPHATEC HOLDINGS INC (ATEC) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).
Is institutional interest in ATEC increasing?
Institutional interest in ATEC can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.
Related ATEC Institutional Insights
- ATEC Overview
- ATEC 13F Institutional Holders
- ATEC Top Institutional Shareholders
- Healthcare Sector Institutional Ownership
- Healthcare Sector Portfolio Overlap
- Institutional Portfolio Overlap & Shared Holdings
- Most Bought Healthcare Stocks By Institutional Investors
- Most Sold Healthcare Stocks By Institutional Investors
- ATEC Insider Trading & SEC Form 4 Activity
- ATEC Articles
- Top Institutional Investor Stock Rankings