217 tracked 13F filers disclose a position in ATEC as of the latest SEC 13F filings, a combined $1.1B in reported value. Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | $109.8M | 10.1M | ▼−0.7% Reduced · −69K sh | Q1 2026 | |
| 2 | AMERICAN CENTURY COMPANIES INC | $69.9M | 6.4M | ▼−1.3% Reduced · −85K sh | Q1 2026 | |
| 3 | VANGUARD CAPITAL MANAGEMENT LLC | $53.5M | 4.9M | →First observed position No prior filed position | Q1 2026 | |
| 4 | ROYAL BANK OF CANADA | $49.1M | 4.5M | ▼−8.1% Reduced · −396K sh | Q1 2026 | |
| 5 | BNP Paribas Asset Management Holding S.A. | $39.3M | 3.6M | ▲+14% Added · +440K sh | Q1 2026 | |
| 6 | STATE STREET CORP | $33.0M | 3.0M | ▲+4.9% Added · +142K sh | Q1 2026 | |
| 7 | GEODE CAPITAL MANAGEMENT, LLC | $31.6M | 2.9M | ▲+2.8% Added · +78K sh | Q1 2026 | |
| 8 | Nuveen, LLC | $31.0M | 2.8M | ▼−0.8% Reduced · −24K sh | Q1 2026 | |
| 9 | MILLENNIUM MANAGEMENT LLC | $30.6M | 2.8M | ▲+26% Added · +584K sh | Q1 2026 | |
| 10 | BANK OF AMERICA CORP /DE/ | $27.9M | 2.6M | ▲+27% Added · +543K sh | Q1 2026 | |
| 11 | Point72 Asset Management, L.P. | $27.1M | 2.5M | ▲+127% Added · +1.4M sh | Q1 2026 | |
| 12 | Hood River Capital Management LLC | $25.0M | 2.3M | ▲+102% Added · +1.2M sh | Q1 2026 | |
| 13 | TREMBLANT CAPITAL GROUP | $23.8M | 2.2M | ▲+35% Added · +567K sh | Q1 2026 | |
| 14 | BRAIDWELL LP | $23.6M | 2.2M | ▲New +2.2M sh | Q1 2026 | |
| 15 | TWO SIGMA INVESTMENTS, LP | $22.2M | 2.0M | ▲+3.8% Added · +75K sh | Q1 2026 | |
| 16 | UBS Group AG | $21.2M | 1.9M | ▲+38% Added · +535K sh | Q1 2026 | |
| 17 | OBERWEIS ASSET MANAGEMENT INC/ | $20.8M | 1.9M | ▲+91% Added · +908K sh | Q1 2026 | |
| 18 | Cerity Partners LLC | $19.8M | 1.8M | ▼−0.2% Reduced · −3K sh | Q1 2026 | |
| 19 | EMERALD ADVISERS, LLC | $19.7M | 1.8M | ▲+10% Added · +170K sh | Q1 2026 | |
| 20 | GOLDMAN SACHS GROUP INC | $19.0M | 1.7M | ▼−17% Reduced · −362K sh | Q1 2026 | |
| 21 | MORGAN STANLEY | $18.0M | 1.7M | ▼−62% Reduced · −2.7M sh | Q1 2026 | |
| 22 | AQR CAPITAL MANAGEMENT LLC | $15.1M | 1.4M | ▲+129% Added · +782K sh | Q1 2026 | |
| 23 | NORTHERN TRUST CORP | $14.8M | 1.4M | ▼−1.3% Reduced · −18K sh | Q1 2026 | |
| 24 | MetLife Investment Management, LLC | $14.4M | 1.3M | ▲+46% Added · +420K sh | Q1 2026 | |
| 25 | DEUTSCHE BANK AG\ | $14.2M | 1.3M | ▼−61% Reduced · −2.0M sh | Q1 2026 |
Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.
Last quarter, 3 funds opened a new position in ATEC and 37 added to an existing one, while 10 reduced and 0 exited entirely — based on 13F filings from active, signal-eligible managers (passive index funds and other mechanical holders are excluded from this count).
| Company | Co-held by | Combined value |
|---|---|---|
| MICROSOFT CORPMSFT | 95 funds | $36.8B |
| ALPHABET INC-CL AGOOGL | 94 funds | $23.2B |
| NVIDIA CORPNVDA | 93 funds | $51.2B |
| AMAZON.COM INCAMZN | 93 funds | $27.7B |
| BROADCOM INCAVGO | 93 funds | $19.0B |
| META PLATFORMS INC-CLASS AMETA | 93 funds | $18.3B |
| ELI LILLY & COLLY | 93 funds | $10.4B |
| VISA INC-CLASS A SHARESV | 93 funds | $7.4B |
| COSTCO WHOLESALE CORPCOST | 93 funds | $7.0B |
| APPLE INCAAPL | 92 funds | $40.3B |
| ALPHABET INC-CL CGOOG | 92 funds | $19.0B |
| MASTERCARD INC - AMA | 92 funds | $8.0B |
Ranked by how many of ATEC's institutional holders also hold each name, a cross-fund conviction signal.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Jun 11, 2026 | MCGINNIS KAREN K | Director | Sell (S) | 6K | $48K |
| May 11, 2026 | Valentine Keith | Director | Buy (P) | 35K | $245K |
| May 8, 2026 | Valentine Keith | Director | Buy (P) | 44K | $331K |
| May 7, 2026 | Valentine Keith | Director | Buy (P) | 56K | $421K |
| Mar 13, 2026 | Koning John Todd | CHIEF FINANCIAL OFFICER | Sell (S) | 80K | $986K |
| Mar 13, 2026 | Lish Scott | CHIEF OPERATING OFFICER | Sell (S) | 261K | $3.2M |
| Mar 11, 2026 | Sponsel David | EVP, SALES | Sell (S) | 163K | $2.0M |
| Mar 9, 2026 | Hunsaker Craig E | EVP, PEOPLE & CULTURE | Sell (S) | 83K | $1.0M |
| Mar 6, 2026 | Hunsaker Craig E | EVP, PEOPLE & CULTURE | Sell (S) | 34K | $411K |
| Mar 5, 2026 | Marshall Tyson Eliot | GENERAL COUNSEL & CORP. SEC. | Sell (S) | 89K | $1.1M |
| Feb 5, 2026 | Sponsel David | EVP, SALES | Sell (S) | 60K | $833K |
| Feb 3, 2026 | Hunsaker Craig E | EVP, PEOPLE & CULTURE | Sell (S) | 37K | $550K |
This stock page is the public Follow view. For one current, evidence-backed answer, use capital_change_brief through REST or MCP. It compares tracked 13F changes with qualifying Form 4 activity and cites the SEC evidence.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/stocks/ATEC/capital-change-brief"
Use Arkolith's capital_change_brief for ATEC. Tell me what changed, whether insider activity corroborates it, and cite the SEC evidence.
13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for ATEC. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.