13 tracked 13F filers disclose a position in ATROB as of the latest SEC 13F filings, a combined $31.9M 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 | NEXT CENTURY GROWTH INVESTORS LLC | $11.6M | 152K | ▲New +152K sh | Q2 2026 | |
| 2 | EMERALD ADVISERS, LLC | $7.9M | 104K | ▲New +104K sh | Q2 2026 | |
| 3 | Ophir Asset Management Pty Ltd | $5.3M | 70K | ▲New +70K sh | Q2 2026 | |
| 4 | EMERALD MUTUAL FUND ADVISERS TRUST | $5.0M | 65K | ▲New +65K sh | Q2 2026 | |
| 5 | WHITE PINE CAPITAL LLC | $772K | 10K | ▲New +10K sh | Q2 2026 | |
| 6 | IRONWOOD INVESTMENT MANAGEMENT LLC | $445K | 6K | ▲New +6K sh | Q2 2026 | |
| 7 | Legato Capital Management LLC | $361K | 5K | ▲New +5K sh | Q2 2026 | |
| 8 | GLOBEFLEX CAPITAL L P | $328K | 4K | ▲New +4K sh | Q2 2026 | |
| 9 | LOS ANGELES CAPITAL MANAGEMENT LLC | $224K | 3K | ▲New +3K sh | Q2 2026 | |
| 10 | McIlrath & Eck, LLC | $109K | 2K | ▲New +2K sh | Q1 2026 | |
| 11 | GAMMA Investing LLC | $9K | 115 | ▲New +115 sh | Q2 2026 | |
| 12 | Sterling Capital Management LLC | $2K | 28 | ▲New +28 sh | Q2 2026 | |
| 13 | ZIONS BANCORPORATION, NATIONAL ASSOCIATION /UT/ | $258 | 3 | ▲New +3 sh | Q2 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, 13 funds opened a new position in ATROB, while 0 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 |
|---|---|---|
| ASTRONICS CORPATRO | 11 funds | $112.0M |
| APPLE INCAAPL | 10 funds | $1.9B |
| ALPHABET INC-CL AGOOGL | 10 funds | $885.2M |
| VISA INC-CLASS A SHARESV | 10 funds | $151.0M |
| AXCELIS TECHNOLOGIES INCACLS | 10 funds | $118.1M |
| MICROSOFT CORPMSFT | 9 funds | $1.3B |
| BROADCOM INCAVGO | 9 funds | $1.1B |
| ALPHABET INC-CL CGOOG | 9 funds | $924.9M |
| AMAZON.COM INCAMZN | 9 funds | $711.4M |
| META PLATFORMS INC-CLASS AMETA | 9 funds | $475.4M |
| CISCO SYSTEMS INCCSCO | 9 funds | $182.6M |
| ONTO INNOVATION INCONTO | 9 funds | $73.1M |
Ranked by how many of ATROB's institutional holders also hold each name, a cross-fund conviction signal.
No open-market insider transactions on file yet. Grants, gifts, and exercises live on the full insider page.
| Class | 13F holders | Value held |
|---|---|---|
| ATROcs | 270 funds | $2.0B |
| ATROBthis pageCommon Stock | 13 funds | $31.9M |
| ATRO 5.5 03/15/30NOTE 5.500% 3/1 | 4 funds | $102.1M |
Same issuer, multiple share classes. The consensus leaderboards count this company once across all classes; this is the per-class detail.
No filings captured for this ticker in the live stream yet.
Connected entities for ATROB
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/ATROB/capital-change-brief"
Use Arkolith's capital_change_brief for ATROB. 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 ATROB. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.