ATROAstronics Corporation

$64.23+93% 1Y

Who owns ATRO

306 institutions reported holding ATRO for 2026Q2, together 80% of the company, more than the 288 a quarter earlier.

306

Institutions reporting a position · as of 2026Q2 · up from 288 the quarter before

Shares held by institutions
30.8M

Shares held by institutions · 80% of the company · long US equity positions only, as reported on Form 13F

Reported value
$2.50B

Reported value · at Jun 30, 2026 prices, not today's

Top 5 holders
26%

Top 5 holders · of the whole company, between five filers

Details›
Reporting quarter2026-06-30
2026Q2
Quarters on record
53
New positions
58
Positions exited
41
Added to
103
Reduced
97
Top 10 holdersof the company
37%
Shares sold shortsettled Sep 15, 2026
3.3M
Short interestof shares outstanding
8.7%
Days to coverat the average daily volume
5.9
Change in the short positionsince the Aug 31, 2026 count
−0.24%
Institutional ownership by quarter, 2013Q2 to 2026Q2
QuarterFilersSharesReported value
2026Q230630.8M$2.50B
2026Q128830.9M$2.06B
2025Q427330.8M$1.67B
2025Q322629.1M$1.33B
2025Q222630.2M$1.01B
2025Q118127.6M$668M
2024Q415424.0M$383M
2024Q314721.1M$412M
2024Q213120.9M$418M
2024Q112920.3M$386M
2023Q412619.6M$341M
2023Q313519.2M$304M
2023Q212118.2M$361M
2023Q111918.0M$240M
2022Q410218.3M$188M
2022Q310818.3M$144M
Largest reported holders, 2026Q2
HolderShares% of companyValue
BlackRock Inc.3.1M8.0%$248M
VANGUARD GROUP INC2.1M5.5%$170M
STATE STREET CORP2.1M5.4%$167M
AMERICAN CENTURY COMPANIES INC1.4M3.8%$117M
Capital International Investors1.3M3.5%$108M
GEODE CAPITAL MANAGEMENT LLC1.0M2.7%$85M
Pertento Partners LLP1.0M2.6%$81M
NEXT CENTURY GROWTH INVESTORS LLC0.7M1.9%$60M
AMERIPRISE FINANCIAL INC0.7M1.9%$58M
DIMENSIONAL FUND ADVISORS LP0.7M1.8%$55M
Short interest by settlement date, Aug 29, 2025 to Sep 15, 2026
SettlementShares shortOf shares outstandingDays to cover
Sep 15, 20263.3M8.7%5.9
Aug 31, 20263.3M8.8%6.0
Aug 14, 20263.3M8.6%4.1
Jul 31, 20263.0M8.0%6.4
Jul 15, 20263.0M7.9%4.2
Jun 30, 20262.9M7.6%3.1
Jun 15, 20262.5M6.6%3.7
May 29, 20262.7M7.1%4.9
May 15, 20262.7M7.1%4.2
Apr 30, 20262.7M7.0%6.8
Apr 15, 20263.1M8.1%7.3
Mar 31, 20263.4M8.8%5.4

SEC Form 13F data sets (DERA bulk files). 13F is quarterly, filed up to 45 days late, and covers long US equity positions only, no shorts, no derivatives, nothing held below the reporting threshold. The short position is FINRA's consolidated count for each twice-monthly settlement date, as a share of shares outstanding.

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