ATRO · Astronics Corp · Shareholders & Ownership
$59.20
-2.62 (-4.24%)
At close · Oct 22
Return incl. dividend (before tax)
Market Cap
$2.52B
Shares
43.01M
Volume · Oct 22
809.66K
Avg daily vol (3M)
625.35K
Every disclosed holder of ATRO in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.
Who Owns ATRO
13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positions| Holder group | Shares | % Out |
|---|---|---|
| Institutional (13F) | 31,705,486 | 73.72% |
| Insiders (Forms 3, 4, 5) | 0 | 0.00% |
| 13D/G-only blocks | 1,747,072 | 4.06% |
| Remaining | 9,556,506 | 22.22% |
| Registered funds (N-PORT, not summed) | 14,667,352 | 34.10% |
Shares outstanding: 43,009,064, the issuer's latest cover-page count restated onto today's split basis.
Insiders are listed but not summed: the issuer has more than one class of common stock and Forms 3, 4 and 5 report one issuer-wide balance across them.
13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.
Holders of ATRO
| # | Holder | Shares | As of | Notes |
|---|---|---|---|---|
| 1 |
BlackRock, Inc.
13F
CIK 2012383 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
3,056,789 | ||
| 1.1 |
iShares Russell 2000 ETF
Fund
S000004344 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
837,683 | ||
| 1.2 |
iShares U.S. Aerospace & Defense ETF
Fund
S000009423 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
320,012 | ||
| 1.3 |
iShares Russell 2000 Growth ETF
Fund
S000004343 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
292,316 | ||
| 1.4 |
Master Small Cap Index Series
Fund
S000002716 · Registered fund · Jun 30, 2026
Quantitative Master Series LLC, not summed
|
58,664 | ||
| 1.5 |
iShares Core S&P Total U.S. Stock Market ETF
Fund
S000004317 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
49,338 | ||
| 2 |
|
2,051,242 | ||
| 2.1 |
State Street(R) SPDR(R) S&P(R) Aerospace & Defense ETF
Fund
S000012318 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
|
1,320,332 | ||
| 2.2 |
STATE STREET SMALL/MID CAP EQUITY INDEX PORTFOLIO
Fund
S000050332 · Registered fund · Jun 30, 2026
STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
|
10,068 | ||
| 2.3 |
State Street(R) SPDR(R) Portfolio MSCI Global Stock Market ETF
Fund
S000036082 · Registered fund · Jun 30, 2026
SPDR INDEX SHARES FUNDS, not summed
|
5,436 | ||
| 2.4 |
State Street Institutional Small-Cap Equity Fund
Fund
S000001631 · Registered fund · Jun 30, 2026
STATE STREET INSTITUTIONAL FUNDS, not summed
|
4,434 | ||
| 2.5 |
State Street Total Return V.I.S. Fund
Fund
S000001637 · Registered fund · Jun 30, 2026
STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed
|
713 | ||
| 3 |
SMALLCAP World Fund Inc
Fund
S000009599 · Registered fund · Jun 30, 2026
SMALLCAP World Fund Inc, not summed
|
1,849,886 | ||
| 4 |
ACK Asset Management LLC
13G
CIK 1510940 · Unknown · Sep 30, 2025
Rule 13d-1(b), qualified institution
|
1,476,000 | ||
| 5 |
AMERICAN CENTURY COMPANIES INC
13F
CIK 748054 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,436,706 | ||
| 5.1 |
American Century Investment Management, Inc.
13G
CIK 52388 · Registered investment adviser · Jun 30, 2026
Rule 13d-1(b), qualified institution, not summed
|
1,436,706 | ||
| 5.2 |
Small Cap Growth Fund
Fund
S000006193 · Registered fund · Jul 31, 2026
American Century Mutual Funds, Inc., not summed
|
768,490 | ||
| 5.3 |
Global Small Cap Fund
Fund
S000053103 · Registered fund · May 31, 2026
American Century World Mutual Funds, Inc., not summed
|
5,934 | ||
| 6 |
VANGUARD CAPITAL MANAGEMENT LLC
13F
CIK 2100119 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,419,352 | ||
| 7 |
Capital International Investors
13F
CIK 1562230 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,324,626 | ||
| 8 |
GEODE CAPITAL MANAGEMENT, LLC
13F
CIK 1214717 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,041,399 | ||
| 9 |
VANGUARD TOTAL STOCK MARKET INDEX FUND
Fund
S000002848 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
1,016,177 | ||
| 10 |
|
1,010,253 | ||
| 11 |
Pertento Partners LLP
13F
CIK 1894571 · Exempt reporting adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
993,637 | ||
| 12 |
NEXT CENTURY GROWTH INVESTORS LLC
13F
CIK 1134007 · Investment adviser · Jun 30, 2026
Classes ATRO, ATROB, carried, not yet filed for the newest quarter
|
895,136 | ||
| 13 |
AMERIPRISE FINANCIAL INC
13F
CIK 820027 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
709,845 | ||
| 13.1 |
Columbia Acorn Fund
Fund
S000009184 · Registered fund · Jun 30, 2026
COLUMBIA ACORN TRUST, not summed
|
340,163 | ||
| 13.2 |
Columbia Variable Portfolio - Acorn Fund
Fund
S000008981 · Registered fund · Jun 30, 2026
COLUMBIA FUNDS VARIABLE SERIES TRUST, not summed
|
65,299 | ||
| 13.3 |
Columbia Research Enhanced Small Cap ETF
Fund
S000095313 · Registered fund · Jun 30, 2026
Columbia ETF Trust I, not summed
|
52 | ||
| 14 |
DIMENSIONAL FUND ADVISORS LP
13F
CIK 354204 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
676,931 | ||
| 14.1 |
U.S. MICRO CAP PORTFOLIO
Fund
S000000948 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
|
129,981 | ||
| 14.2 |
U.S. SMALL CAP PORTFOLIO
Fund
S000000971 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
|
124,184 | ||
| 14.3 |
Dimensional U.S. Small Cap ETF
Fund
S000070906 · Registered fund · Jul 31, 2026
Dimensional ETF Trust, not summed
|
100,940 | ||
| 14.4 |
Dimensional U.S. Core Equity 2 ETF
Fund
S000070903 · Registered fund · Jul 31, 2026
Dimensional ETF Trust, not summed
|
68,489 | ||
| 14.5 |
U.S. Small Cap Growth Portfolio
Fund
S000039439 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
|
41,116 | ||
| 15 |
EMERALD ADVISERS, LLC
13F
CIK 1015083 · Registered investment adviser · Jun 30, 2026
Classes ATRO, ATROB, carried, not yet filed for the newest quarter
|
617,519 | ||
| 16 |
Capital World Investors
13F
CIK 1422849 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
576,671 | ||
| 17 |
Avantis U.S. Small Cap Value ETF
Fund
S000066459 · Registered fund · May 31, 2026
American Century ETF Trust, not summed
|
536,766 | ||
| 18 |
GOLDMAN SACHS GROUP INC
13F
CIK 886982 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
484,353 | ||
| 18.1 |
Goldman Sachs Small Cap Equity Insights Fund
Fund
S000009329 · Registered fund · Jul 31, 2026
Goldman Sachs Trust, not summed
|
46,112 | ||
| 18.2 |
Goldman Sachs Small Cap Growth Insights Fund
Fund
S000014930 · Registered fund · Jul 31, 2026
Goldman Sachs Trust, not summed
|
21,081 | ||
| 18.3 |
Goldman Sachs ActiveBeta(R) U.S. Small Cap Equity ETF
Fund
S000048296 · Registered fund · May 31, 2026
Goldman Sachs ETF Trust, not summed
|
20,633 | ||
| 18.4 |
Goldman Sachs Small Cap Value Insights Fund
Fund
S000014929 · Registered fund · Jul 31, 2026
Goldman Sachs Trust, not summed
|
16,015 | ||
| 18.5 |
Goldman Sachs Variable Insurance Trust Small Cap Equity Insights Fund
Fund
S000009355 · Registered fund · Jun 30, 2026
Goldman Sachs Variable Insurance Trust, not summed
|
11,142 | ||
| 19 |
Ophir Asset Management Pty Ltd
13F
CIK 1844640 · Registered investment adviser · Jun 30, 2026
Classes ATRO, ATROB, carried, not yet filed for the newest quarter
|
455,517 | ||
| 20 |
WESTWOOD HOLDINGS GROUP INC
13F
CIK 1165002 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
430,281 | ||
| 21 |
MORGAN STANLEY
13F
CIK 895421 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
422,557 | ||
| 21.1 |
E*TRADE No Fee Total Market Index Fund
Fund
S000090722 · Registered fund · Jul 31, 2026
E Trade Trust, not summed
|
63 | ||
| 22 |
RAYMOND JAMES FINANCIAL INC
13F
CIK 720005 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
421,741 | ||
| 22.1 |
Carillon Eagle Small Cap Growth Fund
Fund
S000008482 · Registered fund · Jun 30, 2026
Carillon Series Trust, not summed
|
80,577 | ||
| 22.2 |
Carillon Chartwell Small Cap Fund
Fund
S000058964 · Registered fund · Jun 30, 2026
Carillon Series Trust, not summed
|
16,575 | ||
| 22.3 |
Carillon Chartwell Small Cap Growth Fund
Fund
S000075963 · Registered fund · Jun 30, 2026
Carillon Series Trust, not summed
|
11,754 | ||
| 23 |
|
413,383 | ||
| 23.1 |
Nuveen Quant Small Cap Equity Fund
Fund
S000005386 · Registered fund · Jul 31, 2026
TIAA-CREF Funds, not summed
|
259,156 | ||
| 23.2 |
Nuveen Quant Small/Mid Cap Equity Fund
Fund
S000054623 · Registered fund · Jul 31, 2026
TIAA-CREF Funds, not summed
|
46,408 | ||
| 23.3 |
Nuveen Small Cap Blend Index Fund
Fund
S000005367 · Registered fund · Jul 31, 2026
TIAA-CREF Funds, not summed
|
42,454 | ||
| 23.4 |
College Retirement Equities Fund - Total Global Stock Account
Fund
S000005080 · Registered fund · Jun 30, 2026
College Retirement Equities Fund, not summed
|
33,106 | ||
| 23.5 |
Nuveen Equity Index Fund
Fund
S000005360 · Registered fund · Jul 31, 2026
TIAA-CREF Funds, not summed
|
18,240 | ||
| 24 |
D. E. Shaw & Co., Inc.
13F
CIK 1009207 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
406,571 | ||
| 25 |
VANGUARD PORTFOLIO MANAGEMENT LLC
13F
CIK 2100121 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
400,061 | ||
| 26 |
ROYCE & ASSOCIATES LP
13F
CIK 906304 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
393,413 | ||
| 26.1 |
Royce Small-Cap Opportunity Fund
Fund
S000009512 · Registered fund · Jun 30, 2026
ROYCE FUND, not summed
|
109,810 | ||
| 26.2 |
Royce Micro-Cap Fund
Fund
S000009506 · Registered fund · Jun 30, 2026
ROYCE FUND, not summed
|
39,965 | ||
| 26.3 |
Royce Smaller-Companies Growth Fund
Fund
S000009517 · Registered fund · Jun 30, 2026
ROYCE FUND, not summed
|
21,500 | ||
| 26.4 |
Royce Capital Fund - Micro-Cap Portfolio
Fund
S000009496 · Registered fund · Jun 30, 2026
ROYCE CAPITAL FUND, not summed
|
12,787 | ||
| 27 |
EMERALD MUTUAL FUND ADVISERS TRUST
13F
CIK 1352895 · Registered investment adviser · Jun 30, 2026
Classes ATRO, ATROB, carried, not yet filed for the newest quarter
|
392,754 | ||
| 27.1 |
Emerald Growth Fund
Fund
S000036390 · Registered fund · Apr 30, 2026
FINANCIAL INVESTORS TRUST, not summed
|
203,629 | ||
| 28 |
VANGUARD EXTENDED MARKET INDEX FUND
Fund
S000002841 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
370,250 | ||
| 29 |
|
347,555 | ||
| 30 |
|
340,983 | ||
| 31 |
Fisher Asset Management, LLC
13F
CIK 850529 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
333,965 | ||
| 32 |
Point72 Asset Management, L.P.
13F
CIK 1603466 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
330,981 | ||
| 33 |
MILLENNIUM MANAGEMENT LLC
13F
CIK 1273087 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
325,117 | ||
| 34 |
FRED ALGER MANAGEMENT, LLC
13F
CIK 3520 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
323,900 | ||
| 34.1 |
ALGER SMALL CAP FOCUS FUND
Fund
S000020958 · Registered fund · Jul 31, 2026
ALGER FUNDS, not summed
|
282,009 | ||
| 34.2 |
ALGER SMALL CAP GROWTH FUND
Fund
S000009160 · Registered fund · Jul 31, 2026
ALGER FUNDS, not summed
|
10,818 | ||
| 34.3 |
Alger Small Cap Growth Portfolio
Fund
S000009215 · Registered fund · Jun 30, 2026
ALGER PORTFOLIOS, not summed
|
8,394 | ||
| 34.4 |
ALGER SMALL CAP GROWTH INSTITUTIONAL FUND
Fund
S000009202 · Registered fund · Jul 31, 2026
ALGER INSTITUTIONAL FUNDS, not summed
|
4,338 | ||
| 35 |
|
318,514 | ||
| 36 |
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
13F
CIK 884546 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
295,980 | ||
| 36.1 |
Schwab U.S. Small-Cap ETF
Fund
S000026636 · Registered fund · May 31, 2026
SCHWAB STRATEGIC TRUST, not summed
|
182,045 | ||
| 36.2 |
Schwab Small-Cap Index Fund
Fund
S000005912 · Registered fund · Jul 31, 2026
SCHWAB CAPITAL TRUST, not summed
|
78,023 | ||
| 36.3 |
Schwab Small-Cap Equity Fund
Fund
S000005516 · Registered fund · Jul 31, 2026
SCHWAB CAPITAL TRUST, not summed
|
31,718 | ||
| 36.4 |
Schwab Total Stock Market Index Fund
Fund
S000005913 · Registered fund · Jul 31, 2026
SCHWAB CAPITAL TRUST, not summed
|
23,443 | ||
| 36.5 |
Schwab U.S. Broad Market ETF
Fund
S000026631 · Registered fund · May 31, 2026
SCHWAB STRATEGIC TRUST, not summed
|
22,055 | ||
| 37 |
PEABODY MARK
Insider
CIK 1492763 · Sep 30, 2026
Executive VP & Pres-Aerospace, issuer-wide, not summed
|
295,508 | ||
| 38 |
CASPIAN CAPITAL LP
13F
CIK 1518999 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
285,965 | ||
| 39 |
PRICE T ROWE ASSOCIATES INC /MD/
13F
CIK 80255 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
281,518 | ||
| 39.1 |
T. Rowe Price New Horizons Fund, Inc.
Fund
S000002106 · Registered fund · Jun 30, 2026
T. ROWE PRICE NEW HORIZONS FUND, INC., not summed
|
161,700 | ||
| 39.2 |
T. Rowe Price Small-Cap Index Fund
Fund
S000051327 · Registered fund · Jun 30, 2026
T. ROWE PRICE INDEX TRUST, INC., not summed
|
4,901 | ||
| 39.3 |
T. Rowe Price Extended Equity Market Index Fund
Fund
S000002090 · Registered fund · Jun 30, 2026
T. ROWE PRICE INDEX TRUST, INC., not summed
|
3,605 | ||
| 40 |
JUPITER ASSET MANAGEMENT LTD
13F
CIK 1215838 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
280,672 | ||
| 41 |
NEEDHAM INVESTMENT MANAGEMENT LLC
13F
CIK 1167212 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
272,500 | ||
| 41.1 |
Needham Aggressive Growth Fund
Fund
S000003815 · Registered fund · Jun 30, 2026
Needham Funds Inc, not summed
|
272,500 | ||
| 42 |
REDWOOD CAPITAL MANAGEMENT, LLC
13G
CIK 1316622 · Registered investment adviser · Mar 31, 2025
Rule 13d-1(b), qualified institution
|
271,072 | ||
| 43 |
NORTHERN TRUST CORP
13F
CIK 73124 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
|
258,416 | ||
| 43.1 |
Small Cap Index Fund
Fund
S000001245 · Registered fund · Jun 30, 2026
Northern Funds, not summed
|
13,343 | ||
| 43.2 |
Small Cap Core Fund
Fund
S000001244 · Registered fund · Jun 30, 2026
Northern Funds, not summed
|
5,995 | ||
| 44 |
Driehaus Capital Management LLC
13F
CIK 938206 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
257,865 | ||
| 44.1 |
Driehaus Micro Cap Growth Fund
Fund
S000042829 · Registered fund · Jun 30, 2026
Driehaus Mutual Funds, not summed
|
40,594 | ||
| 45 |
TWO SIGMA INVESTMENTS, LP
13F
CIK 1179392 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
254,758 | ||
| 46 |
AQR CAPITAL MANAGEMENT LLC
13F
CIK 1167557 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
253,603 | ||
| 46.1 |
AQR Small Cap Multi-Style Fund
Fund
S000040064 · Registered fund · Jun 30, 2026
AQR Funds, not summed
|
11,873 | ||
| 46.2 |
AQR Small Cap Momentum Style Fund
Fund
S000025644 · Registered fund · Mar 31, 2026
AQR Funds, not summed
|
7,211 | ||
| 47 |
KAMES CAPITAL plc
13F
CIK 1539994 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
245,048 | ||
| 48 |
FIRST TRUST ADVISORS LP
13F
CIK 1125816 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
231,693 | ||
| 48.1 |
First Trust Small Cap Growth AlphaDEX Fund
Fund
S000031806 · Registered fund · Jul 31, 2026
First Trust Exchange-Traded AlphaDEX Fund, not summed
|
107,992 | ||
| 48.2 |
First Trust Small Cap Core AlphaDEX Fund
Fund
S000017339 · Registered fund · Jul 31, 2026
First Trust Exchange-Traded AlphaDEX Fund, not summed
|
53,675 | ||
| 48.3 |
First Trust Indxx Aerospace & Defense ETF
Fund
S000077603 · Registered fund · Jun 30, 2026
First Trust Exchange-Traded Fund, not summed
|
29,732 | ||
| 48.4 |
First Trust Multi Cap Growth AlphaDEX Fund
Fund
S000017343 · Registered fund · Jul 31, 2026
First Trust Exchange-Traded AlphaDEX Fund, not summed
|
9,782 | ||
| 48.5 |
First Trust Active Factor Small Cap ETF
Fund
S000066790 · Registered fund · Aug 31, 2026
First Trust Exchange-Traded Fund VIII, not summed
|
6,460 | ||
| 49 |
VANGUARD FIDUCIARY TRUST CO
13F
CIK 933478 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
231,255 | ||
| 50 |
Emerald Growth Fund
Fund
S000093696 · Registered fund · Jul 31, 2026
RBB Fund, Inc., not summed
|
198,938 |
26 more nested rows are not shown here; Every filing lists them all.
Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.
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