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$IA
$21.64 +$0.90 (4.34%) Close

Ownership

13F as of Q2 2026 · 17.9M shares outstanding

Who owns IA?

By type of holder
Institutions 56.7% Insiders 4.5% Everyone else 38.8%
Concentration Top 10 holders own 30.8%
BlackRock, Inc. 6.0% · Marshall Wace, LLP 3.9%
Institutional ownership
56.7%
+3.4 pts vs last qtr
Institutional holders
118
-4 vs last qtr
Net shares bought
+609.8K
by institutions in Q2 2026
New / sold out
35 / 39
positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026
  • BlackRock, Inc. +779.3K
  • CenterBook Partners LP NEW +265.0K

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Biggest sellers in Q2 2026
  • Driehaus Capital Management LLC SOLD OUT −348.1K
  • Millennium Management LLC −199.0K

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Who is planning to sell?

No insider has filed a notice of proposed sale (Form 144) for Innovative Solutions and Support Inc in the last 12 months.

Is your stake being diluted?

Diluted share count, FY2016–FY2025
+4.6%
+0.50% a year
Each share's claim on the business
−4.4%
shrank without buying or selling a share
Spent on buybacks vs paid in stock
$725K vs $4.79M
over 10 fiscal years
Diluted shares, split-adjusted
16.3M17.2M18.0M2016: 17.0M shares'162017: 16.9M shares'172018: 16.8M shares'182019: 16.9M shares'192020: 17.1M shares'202021: 17.2M shares'212022: 17.3M shares'222023: 17.4M shares'232024: 17.5M shares'242025: 17.8M shares'25
Buybacks Stock-based comp
$0$1.2M$2.3M2016 buybacks: $724.8K2016 stock comp: $0'162017 buybacks: $02017 stock comp: $0'172018 buybacks: $02018 stock comp: $0'182019 buybacks: $02019 stock comp: $0'192020 buybacks: $02020 stock comp: $0'202021 buybacks: $02021 stock comp: $0'212022 buybacks: $02022 stock comp: $0'222023 buybacks: $02023 stock comp: $1.5M'232024 buybacks: $02024 stock comp: $1.0M'242025 buybacks: $02025 stock comp: $2.3M'25

How patient are the owners?

Institutional shares by how long they've been held
5+ years47% 3–5 years0% 1–3 years28% Under 1 year26%
Quarterly turnover
33.2%
of institutional shares changed hands
Top 10 managers, median time held
5 years

Super Investors

Investment managers reporting IA on Form 13F
B
BlackRock, Inc.
Shares
1.1M
% of company
5.96%
Change vs last qtr
+779.3K (+271.0%)
Held since
≤2021
MW
Marshall Wace, LLP
Shares
691.8K
% of company
3.86%
Change vs last qtr
−61.6K (−8.2%)
Held since
2024

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Institutional Funds

Mutual funds and ETFs reporting IA on Form N-PORT; together they hold 18.0% of the company
VT
Vanguard Total Stock Market Index Fund
Vanguard Index Funds
Position value
$8.48M
% of company
2.63%
% of the fund
0.00%
As of
June 30, 2026
IR
iShares Russell 2000 ETF
iShares Trust
Position value
$6.68M
% of company
2.07%
% of the fund
0.01%
As of
June 30, 2026

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Insiders and 5%+ holders

From Forms 3/4/5 and Schedules 13D/G
AS
Askarpour Shahram
Insider
Shares
493.9K
% of company
2.76%
Change vs last qtr
—
Held since
—
BG
Bressner Glen R
Insider
Shares
156.2K
% of company
0.87%
Change vs last qtr
—
Held since
—

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