ATRO · Astronics Corp · Holdings
Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.
Institutional Ownership Trend
Superinvestors Holding ATRO
All superinvestors →Holder Concentration
Across 314 13F filersWho Holds ATRO
Last 8 quarters through Sep 30, 2026 (filing window open)Each kind of 13F filer's share of the common shares 13F filers report. Holder type comes from regulatory records, never the filer's name; style, turnover and horizon are measured from each filer's own 13F book. The quarter selector does not change this card.
Jun 30, 2026, the newest closed quarter: 312 filers, like-for-like change -16.1%; actively managed books -16.3%; index-like books -15.9%.
| Holder type | Share | Filers | Change |
|---|---|---|---|
| Registered adviser | 39.7% | 166 | -11.6% |
| Exempt adviser | 3.7% | 6 | -24.6% |
| Adviser | 14.6% | 11 | +1.3% |
| Bank | 11.2% | 20 | -22.2% |
| Insurer | 0.4% | 3 | -27.7% |
| Broker-dealer | 0.3% | 1 | -8.5% |
| Benefit plan | 0.3% | 4 | -19.7% |
| Non-US | 1.9% | 9 | -64.8% |
| Holding company | 13.3% | 6 | -12.1% |
| Unknown | 14.7% | 86 | -26.2% |
| Style | Share | Filers | Change |
|---|---|---|---|
| Index-like | 32.6% | 34 | -15.9% |
| Systematic-like | 6.2% | 30 | -40.2% |
| Concentrated | 5.0% | 28 | -11.1% |
| Diversified active | 56.2% | 220 | -12.9% |
| Not measured | 0.0% | 0 | — |
| Unknown | 0.0% | 0 | — |
| Turnover | Share | Filers | Change |
|---|---|---|---|
| Low turnover | 49.0% | 156 | -17.3% |
| Medium turnover | 31.4% | 78 | -13.0% |
| High turnover | 10.4% | 55 | -22.4% |
| Unknown | 9.1% | 23 | -11.9% |
| Not measured | 0.0% | 0 | — |
| Holding horizon | Share | Filers | Change |
|---|---|---|---|
| Short horizon | 11.4% | 43 | +2.0% |
| Medium horizon | 17.2% | 45 | -12.9% |
| Long horizon | 58.7% | 189 | -17.5% |
| Unknown | 12.6% | 35 | -26.2% |
| Not measured | 0.0% | 0 | — |
| 13F book size | Share | Filers | Change |
|---|---|---|---|
| Under $1B | 3.4% | 68 | -11.2% |
| $1B to $10B | 17.9% | 84 | +3.4% |
| $10B to $100B | 14.2% | 92 | -26.3% |
| $100B or more | 64.5% | 68 | -18.2% |
| Not measured | 0.0% | 0 | — |
| Client base | Share | Filers | Change |
|---|---|---|---|
| Individuals and high net worth | 2.1% | 71 | -25.2% |
| Pooled investment vehicles | 8.7% | 34 | -13.3% |
| Registered funds and BDCs | 19.9% | 24 | -13.2% |
| Pension and profit sharing plans | 0.0% | 2 | -43.2% |
| Insurance companies | 0.9% | 4 | +816.5% |
| Charitable organizations | 0.0% | 1 | -16.5% |
| Governments and sovereign funds | 3.1% | 8 | -8.4% |
| Other investment advisers | 0.5% | 3 | -19.7% |
| Diversified | 4.4% | 19 | -9.2% |
| Unknown | 60.3% | 146 | -18.9% |
| Private funds | Share | Filers | Change |
|---|---|---|---|
| Hedge funds | 17.4% | 59 | -26.4% |
| Private equity funds | 0.5% | 8 | -1.3% |
| Venture capital funds | 0.0% | 1 | -16.3% |
| Real estate funds | 0.0% | 3 | +224.5% |
| Securitized asset funds | 0.2% | 1 | -8.7% |
| Other private funds | 6.3% | 16 | -0.5% |
| Mixed private funds | 0.6% | 5 | -20.2% |
| Private funds, type not stated | 1.5% | 4 | +89.9% |
| No private funds | 17.0% | 75 | -3.9% |
| Unknown | 56.6% | 140 | -18.5% |
| Location | Share | Filers | Change |
|---|---|---|---|
| United States | 86.7% | 258 | -16.9% |
| Outside the US | 13.3% | 54 | -10.3% |
The Sep 30, 2026 filing window is still open, so its bar carries the Jun 30, 2026 positions of filers that have not filed yet.
How the mix is measured
Shares are 13F common shares restated to today's split basis; options and principal amounts are left out. The change compares only filers with a 13F in both quarters and keeps each filer in its bucket of the later quarter on both sides; a filer that continues under a new CIK is compared through its successor. Holder type comes from each filer's current regulatory profile; client base and private funds come from the Form ADV roster current at each quarter end (rosters from December 2019, so an earlier quarter reads Unknown). Style, turnover, horizon and book size are measured from each filer's 13F book in the newest measured quarter, and Not measured means none was. Actively managed books are those measured systematic-like, concentrated or diversified active.
Excluded 5 holders with no observed 2026-03-31 13F and 4 holders with no observed 2026-06-30 13F. Compared across CIK changes: JANUS HENDERSON GROUP PLC continues as Jupiter Topco LLC.
Conviction and Crowding
311 13F filers, quarter ended Jun 30, 2026Measured across every 13F filer's common-share book once the quarter's filing window closed. Crowding counts filers with high turnover or that advise private funds on Form ADV.
Managers in the top fifth by current three-year FundScore alpha were net buyers of $0 (0 buying, 0 selling).
Estimated Holder Cost Basis
Quarter ended Jun 30, 2026, on that quarter's share basisEstimated, never filed: each 13F buy is costed at its quarter's average traded price and each sale keeps the average cost, so this is what holders paid on average if they traded evenly through each quarter.
Estimated cost covers 38.1% of the 13F shares; positions already held when a filer's 13F history starts, or bought in a quarter without a trusted average price, have no estimate.
Shared Holders
Companies ATRO's active holders also own, quarter ended Jun 30, 2026| # | Company | Shared holders |
|---|---|---|
| 1 | LINC Lincoln Educational Services Corp | 8 |
| 2 | VPG Vishay Precision Group, Inc. | 6 |
| 3 | AIP Arteris, Inc. | 5 |
| 4 | ARLO Arlo Technologies, Inc. | 6 |
| 5 | CDNL Cardinal Infrastructure Group Inc. | 6 |
| 6 | EVLV Evolv Technologies Holdings, Inc. | 6 |
| 7 | LPTH Lightpath Technologies Inc | 6 |
| 8 | INFU InfuSystem Holdings, Inc | 3 |
| 9 | CECO Ceco Environmental Corp | 8 |
| 10 | XMTR Xometry, Inc. | 7 |
Shareholder Targets
13F filers that own its peers but not ATRO, quarter ended Jun 30, 2026Found through its holder-overlap peers: LINC, VPG, AIP, ARLO, CDNL, EVLV, LPTH, INFU, CECO, XMTR, MOD, ELMD, ROCK, PDFS, NPKI, EZPW, MITK, LIND, AIR, ASUR. 1,014 filers in all.
| # | Filer | In peers | Largest peers |
|---|---|---|---|
| 1 | Capital Research Global Investors Adviser, Diversified active | $683,988,514 3 held | MOD, AIR, EZPW |
| 2 | PRIMECAP MANAGEMENT CO/CA/ Registered adviser, Diversified active | $671,006,389 3 held | XMTR, ARLO, ROCK |
| 3 | T. Rowe Price Investment Management, Inc. Adviser, Diversified active | $615,502,867 6 held | MOD, CECO, VPG |
| 4 | FULLER & THALER ASSET MANAGEMENT, INC. Registered adviser, Diversified active | $544,131,960 6 held | MOD, XMTR, AIR |
| 5 | WELLINGTON MANAGEMENT GROUP LLP Holding company, Diversified active | $540,492,613 8 held | MOD, XMTR, AIR |
| 6 | LORD, ABBETT & CO. LLC Registered adviser, Diversified active | $402,067,452 9 held | MOD, CDNL, XMTR |
| 7 | PARADIGM CAPITAL MANAGEMENT INC/NY Registered adviser, Concentrated | $392,764,725 2 held | MOD, ARLO |
| 8 | Artisan Partners Limited Partnership Registered adviser, Diversified active | $318,254,729 1 held | MOD |
| 9 | WASATCH ADVISORS LP Registered adviser, Diversified active | $309,936,491 7 held | PDFS, ARLO, NPKI |
| 10 | BARROW HANLEY MEWHINNEY & STRAUSS LLC Registered adviser, Diversified active | $291,933,057 5 held | PDFS, AIR, VPG |
Fund Ownership of ATRO by Fund Type
Registered funds' Form N-PORT reports for the quarter ended Jun 30, 2026Index funds and index ETFs hold 17.59% of shares outstanding.
| Fund type | Of shares outstanding | Shares |
|---|---|---|
| Index funds | 3.11% | 1,339,354 |
| Index ETFs | 14.48% | 6,225,861 |
| Active ETFs | 0.95% | 409,631 |
| Active funds | 17.02% | 7,318,764 |
| Unclassified | 1.80% | 773,955 |
| All registered funds | 37.36% | 16,067,565 |
How fund types are measured
Each fund series counts once, with its latest Form N-PORT report dated inside the quarter; only long share positions count, restated to today's split basis. The fund type is the series' latest Form N-CEN answer on or before the quarter end (the index-fund box and the exchange-traded flag), never its name. Unclassified funds have no usable N-CEN; unit investment trusts are among them, so index ownership is a floor. Funds sit inside their advisers' 13F reports, so these shares overlap the 13F figures and are never added to them.
| Holder | Value (USD) | % of 13F | Shares | Type | Filed | Open |
|---|---|---|---|---|---|---|
| Mega BlackRock, Inc. Holding company | $248,394,668 | 9.24% | 3,056,789 | Shares | 2026-08-07 | |
| Mega STATE STREET CORP Bank | $166,683,924 | 6.20% | 2,051,242 | Shares | 2026-09-22 | |
| Mega AMERICAN CENTURY COMPANIES INC | $116,746,729 | 4.34% | 1,436,706 | Shares | 2026-08-12 | |
| Mega VANGUARD CAPITAL MANAGEMENT LLC Registered adviser | $115,336,543 | 4.29% | 1,419,352 | Shares | 2026-08-13 | |
| Mega Capital International Investors Adviser | $107,639,108 | 4.00% | 1,324,626 | Shares | 2026-08-12 | |
| Mega GEODE CAPITAL MANAGEMENT, LLC Registered adviser | $84,624,081 | 3.15% | 1,041,399 | Shares | 2026-08-12 | |
| Mid Pertento Partners LLP Exempt adviser | $80,742,942 | 3.00% | 993,637 | Shares | 2026-08-13 | |
| Mega UBS Group AG Bank | $79,967,966 | 2.97% | 984,100 | Call | 2026-08-13 | |
| Mid NEXT CENTURY GROWTH INVESTORS LLC Adviser | $60,383,168 | 2.25% | 743,086 | Shares | 2026-08-14 | |
| Mega AMERIPRISE FINANCIAL INC Adviser | $57,682,002 | 2.15% | 709,845 | Shares | 2026-08-14 | |
| Mega DIMENSIONAL FUND ADVISORS LP Registered adviser | $55,007,411 | 2.05% | 676,931 | Shares | 2026-08-11 | |
| Mega Capital World Investors Adviser | $46,860,285 | 1.74% | 576,671 | Shares | 2026-08-12 | |
| Mid EMERALD ADVISERS, LLC Registered adviser | $41,766,339 | 1.55% | 513,984 | Shares | 2026-08-05 | |
| Mega GOLDMAN SACHS GROUP INC Holding company | $39,358,523 | 1.46% | 484,353 | Shares | 2026-08-14 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $35,721,896 | 1.33% | 439,600 | Call | 2026-08-14 | |
| Large WESTWOOD HOLDINGS GROUP INC Adviser | $34,964,634 | 1.30% | 430,281 | Shares | 2026-08-14 | |
| Mega MORGAN STANLEY Holding company | $34,336,979 | 1.28% | 422,557 | Shares | 2026-08-13 | |
| Mega RAYMOND JAMES FINANCIAL INC | $34,270,671 | 1.27% | 421,741 | Shares | 2026-08-14 | |
| Mega Nuveen, LLC | $33,591,501 | 1.25% | 413,383 | Shares | 2026-08-11 | |
| Mega D. E. Shaw & Co., Inc. | $33,037,958 | 1.23% | 406,571 | Shares | 2026-08-14 | |
| Mega VANGUARD PORTFOLIO MANAGEMENT LLC Registered adviser | $32,508,956 | 1.21% | 400,061 | Shares | 2026-08-13 | |
| Large ROYCE & ASSOCIATES LP Registered adviser | $31,968,740 | 1.19% | 393,413 | Shares | 2026-08-14 | |
| Mid Ophir Asset Management Pty Ltd Registered adviser | $31,349,376 | 1.17% | 385,791 | Shares | 2026-08-14 | |
| Mega UBS Group AG Bank | $28,242,319 | 1.05% | 347,555 | Shares | 2026-08-13 | |
| Mega Fisher Asset Management, LLC Adviser | $27,137,995 | 1.01% | 333,965 | Shares | 2026-08-04 | |
| Large Point72 Asset Management, L.P. Registered adviser | $26,895,516 | 1.00% | 330,981 | Shares | 2026-08-14 | |
| Mid EMERALD MUTUAL FUND ADVISERS TRUST Registered adviser | $26,595,991 | 0.99% | 327,295 | Shares | 2026-08-05 | |
| Mega MILLENNIUM MANAGEMENT LLC Registered adviser | $26,419,007 | 0.98% | 325,117 | Shares | 2026-08-14 | |
| Large FRED ALGER MANAGEMENT, LLC Registered adviser | $26,320,114 | 0.98% | 323,900 | Shares | 2026-08-14 | |
| Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC Registered adviser | $24,051,334 | 0.89% | 295,980 | Shares | 2026-08-14 | |
| Small CASPIAN CAPITAL LP Registered adviser | $23,237,515 | 0.86% | 285,965 | Shares | 2026-08-14 | |
| Mega PRICE T ROWE ASSOCIATES INC /MD/ Registered adviser | $22,876,152 | 0.85% | 281,518 | Shares | 2026-08-14 | |
| Large JUPITER ASSET MANAGEMENT LTD Registered adviser | $22,807,405 | 0.85% | 280,672 | Shares | 2026-08-10 | |
| Mid NEEDHAM INVESTMENT MANAGEMENT LLC Registered adviser | $22,143,350 | 0.82% | 272,500 | Shares | 2026-08-14 | |
| Mega NORTHERN TRUST CORP Bank | $20,998,882 | 0.78% | 258,416 | Shares | 2026-08-13 | |
| Large Driehaus Capital Management LLC Registered adviser | $20,954,109 | 0.78% | 257,865 | Shares | 2026-08-14 | |
| Mega TWO SIGMA INVESTMENTS, LP Registered adviser | $20,701,635 | 0.77% | 254,758 | Shares | 2026-08-14 | |
| Mega AQR CAPITAL MANAGEMENT LLC Registered adviser | $20,607,778 | 0.77% | 253,603 | Shares | 2026-08-14 | |
| Mid KAMES CAPITAL plc Registered adviser | $19,912,600 | 0.74% | 245,048 | Shares | 2026-07-13 | |
| Mega FIRST TRUST ADVISORS LP Registered adviser | $18,827,373 | 0.70% | 231,693 | Shares | 2026-08-11 | |
| Mega VANGUARD FIDUCIARY TRUST CO | $18,791,781 | 0.70% | 231,255 | Shares | 2026-08-13 | |
| Mega ROYAL BANK OF CANADA Bank | $15,906,074 | 0.59% | 195,743 | Shares | 2026-08-14 | |
| Large First Eagle Investment Management, LLC Registered adviser | $15,660,914 | 0.58% | 192,726 | Shares | 2026-08-24 | |
| Large M&G PLC Holding company | $15,414,290 | 0.57% | 189,691 | Shares | 2026-08-06 | |
| Mega NORGES BANK Non-US | $14,976,218 | 0.56% | 184,300 | Shares | 2026-08-12 | |
| Large RENAISSANCE TECHNOLOGIES LLC Registered adviser | $13,994,597 | 0.52% | 172,220 | Shares | 2026-08-13 | |
| Mega Invesco Ltd. Adviser | $13,731,475 | 0.51% | 168,982 | Shares | 2026-08-14 | |
| Small Congruence Capital, LLC Registered adviser | $13,721,238 | 0.51% | 168,856 | Shares | 2026-08-13 | |
| Mega BANK OF AMERICA CORP /DE/ Bank | $13,223,031 | 0.49% | 162,725 | Shares | 2026-08-14 | |
| Large Assenagon Asset Management S.A. | $12,197,356 | 0.45% | 180,916 | Shares | 2026-10-15 | |
| Mega BNP PARIBAS ARBITRAGE, SA Non-US | $12,053,214 | 0.45% | 148,329 | Shares | 2026-08-13 | |
| Mid Nicholas Investment Partners, LP Registered adviser | $11,716,554 | 0.44% | 144,186 | Shares | 2026-08-14 | |
| Mid NEXT CENTURY GROWTH INVESTORS LLC Adviser ATROB | $11,555,800 | 0.43% | 152,050 | Shares | 2026-08-14 | |
| Mid KENNEDY CAPITAL MANAGEMENT LLC Registered adviser | $11,475,374 | 0.43% | 141,218 | Shares | 2026-08-14 | |
| Large ACADIAN ASSET MANAGEMENT LLC | $11,367,867 | 0.42% | 139,895 | Shares | 2026-08-13 | |
| Mid Advisors Asset Management, Inc. Registered adviser | $11,327,481 | 0.42% | 139,398 | Shares | 2026-08-14 | |
| Large Connor, Clark & Lunn Investment Management Ltd. Registered adviser | $11,279,781 | 0.42% | 138,811 | Shares | 2026-08-13 | |
| Large HRT FINANCIAL LP | $10,629,864 | 0.40% | 130,813 | Shares | 2026-08-14 | |
| Mid PEREGRINE CAPITAL MANAGEMENT LLC Registered adviser | $10,551,448 | 0.39% | 129,848 | Shares | 2026-07-17 | |
| Mega WELLS FARGO & COMPANY/MN Bank | $10,359,186 | 0.39% | 127,482 | Shares | 2026-08-14 | |
| Mid ALGERT GLOBAL LLC Registered adviser | $10,312,056 | 0.38% | 126,902 | Shares | 2026-08-13 | |
| Mega FRANKLIN RESOURCES INC Adviser | $10,024,394 | 0.37% | 123,362 | Shares | 2026-08-13 | |
| Mega JANE STREET GROUP, LLC | $9,418,277 | 0.35% | 115,903 | Shares | 2026-08-14 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $8,624,530 | 0.32% | 106,135 | Shares | 2026-08-14 | |
| Mid RBF Capital, LLC | $8,156,228 | 0.30% | 100,372 | Shares | 2026-08-14 | |
| Mid EMERALD ADVISERS, LLC Registered adviser ATROB | $7,868,660 | 0.29% | 103,535 | Shares | 2026-08-05 | |
| Mega CITADEL ADVISORS LLC Registered adviser | $7,846,953 | 0.29% | 96,566 | Shares | 2026-09-02 | |
| Small Beacon Harbor Wealth Advisors, Inc. Registered adviser | $7,748,872 | 0.29% | 95,359 | Shares | 2026-08-07 | |
| Mega Bank of New York Mellon Corp Bank | $7,722,704 | 0.29% | 95,037 | Shares | 2026-08-06 | |
| Mega HSBC HOLDINGS PLC | $7,630,557 | 0.28% | 93,903 | Shares | 2026-08-14 | |
| Large NEW YORK STATE COMMON RETIREMENT FUND | $7,433,502 | 0.28% | 91,478 | Shares | 2026-07-29 | |
| Mid SG Capital Management LLC Registered adviser | $7,244,410 | 0.27% | 89,151 | Shares | 2026-08-07 | |
| Mid Jump Financial, LLC | $7,144,460 | 0.27% | 87,921 | Shares | 2026-08-13 | |
| Mega PRINCIPAL FINANCIAL GROUP INC Insurer | $6,984,377 | 0.26% | 85,951 | Shares | 2026-08-04 | |
| Large TORONTO DOMINION BANK Bank | $6,745,311 | 0.25% | 83,009 | Shares | 2026-08-14 | |
| Mega LPL Financial LLC Broker-dealer | $6,509,088 | 0.24% | 80,102 | Shares | 2026-08-07 | |
| Mega JPMORGAN CHASE & CO Bank | $6,425,958 | 0.24% | 79,079 | Shares | 2026-08-12 | |
| Mid Informed Momentum Co LLC Registered adviser | $6,422,952 | 0.24% | 79,042 | Shares | 2026-08-13 | |
| Mega NORDEA INVESTMENT MANAGEMENT AB Non-US | $6,238,654 | 0.23% | 76,774 | Shares | 2026-08-05 | |
| Large HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND Non-US | $6,045,744 | 0.22% | 74,400 | Shares | 2026-08-13 | |
| Mid Private Capital Management, LLC Registered adviser | $5,957,170 | 0.22% | 73,310 | Shares | 2026-08-14 | |
| Mega BARCLAYS PLC Bank | $5,732,404 | 0.21% | 70,544 | Shares | 2026-08-14 | |
| Mid Hennion & Walsh Asset Management, Inc. | $5,662,538 | 0.21% | 83,989 | Shares | 2026-10-13 | |
| Mid Ophir Asset Management Pty Ltd Registered adviser ATROB | $5,299,176 | 0.20% | 69,726 | Shares | 2026-08-14 | |
| Mid EMERALD MUTUAL FUND ADVISERS TRUST Registered adviser ATROB | $4,974,884 | 0.19% | 65,459 | Shares | 2026-08-05 | |
| Mega VICTORY CAPITAL MANAGEMENT INC Registered adviser | $4,931,588 | 0.18% | 60,689 | Shares | 2026-08-07 | |
| Mega DEUTSCHE BANK AG\ Non-US | $4,869,342 | 0.18% | 59,923 | Shares | 2026-08-07 | |
| Mega Swiss National Bank | $4,810,592 | 0.18% | 59,200 | Shares | 2026-08-11 | |
| Large CREDIT AGRICOLE S A | $4,713,080 | 0.18% | 58,000 | Shares | 2026-08-14 | |
| Mega RHUMBLINE ADVISERS Registered adviser | $4,672,450 | 0.17% | 57,500 | Shares | 2026-08-12 | |
| Mega Qube Research & Technologies Ltd Exempt adviser | $4,643,115 | 0.17% | 57,139 | Shares | 2026-08-14 | |
| Small Teton Advisors, LLC Registered adviser | $4,550,560 | 0.17% | 56,000 | Shares | 2026-08-12 | |
| Small Minerva Advisors LLC Registered adviser | $4,472,631 | 0.17% | 55,041 | Shares | 2026-08-12 | |
| Mid CAXTON ASSOCIATES LLP Registered adviser | $4,407,461 | 0.16% | 54,239 | Shares | 2026-08-14 | |
| Large MARSHALL WACE, LLP Exempt adviser | $4,359,923 | 0.16% | 53,654 | Shares | 2026-08-13 | |
| Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC Registered adviser | $4,357,727 | 0.16% | 53,627 | Shares | 2026-08-13 | |
| Large ExodusPoint Capital Management, LP Registered adviser | $4,340,665 | 0.16% | 53,417 | Shares | 2026-08-14 | |
| Small WHITE PINE CAPITAL LLC Registered adviser | $4,094,772 | 0.15% | 50,391 | Shares | 2026-08-05 | |
| Large Trexquant Investment LP Registered adviser | $3,883,171 | 0.14% | 47,787 | Shares | 2026-08-14 | |
| Mega SEI INVESTMENTS CO | $3,797,523 | 0.14% | 46,733 | Shares | 2026-08-14 |
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