IA · Innovative Solutions & Support Inc · Shareholders & Ownership

$19.84 +0.29 (+1.48%) At close · Oct 21

Russell 2000 member Rebalance outlook locked

Market Cap

$355.12M

17.90M

Volume · Oct 21 210.21K Avg daily vol (3M) 271.42K

Every disclosed holder of IA 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.

How the holder list picks a filing →

Who Owns IA

13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positions

Holder group	Holders	Shares	% Out	Summed
Institutional (13F)	126	10,458,850	58.43%	Yes
Insiders (Forms 3, 4, 5)	9	2,501,574	13.98%	Yes
13D/G-only blocks	2	1,558,776	8.71%	Yes
Remaining	—	3,379,973	18.88%	Rest
Registered funds (N-PORT, not summed)	126	3,215,864	17.97%	No

Shares outstanding: 17,899,173, the issuer's latest cover-page count restated onto today's split basis.

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 IA

One row per holder Every filing By ultimate parent

All 13F Funds Insiders 13D/G Non-US

#	Holder	Shares	% Out	Change	As of	Notes
1	BlackRock, Inc. 13F CIK 2012383 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	1,066,911	5.96%	+779,333	Jun 30, 2026	carried, not yet filed for the newest quarter
1.1	BlackRock, Inc. 13G CIK 2012383 · Holding company · Jun 30, 2026 Rule 13d-1(b), qualified institution, not summed	1,043,570	5.83%	—	Jun 30, 2026	Rule 13d-1(b), qualified institution, not summed
1.2	iShares Russell 2000 ETF Fund S000004344 · Registered fund · Jun 30, 2026 iShares Trust, not summed	370,902	2.07%	—	Jun 30, 2026	iShares Trust, not summed
1.3	iShares Russell 2000 Growth ETF Fund S000004343 · Registered fund · Jun 30, 2026 iShares Trust, not summed	139,173	0.78%	—	Jun 30, 2026	iShares Trust, not summed
1.4	iShares Micro-Cap ETF Fund S000004439 · Registered fund · Jun 30, 2026 iShares Trust, not summed	49,826	0.28%	+12,154	Jun 30, 2026	iShares Trust, not summed
1.5	Master Small Cap Index Series Fund S000002716 · Registered fund · Jun 30, 2026 Quantitative Master Series LLC, not summed	27,702	0.15%	—	Jun 30, 2026	Quantitative Master Series LLC, not summed
2	Christopher Scott Ginieczki, as Personal Representative of the Estate of Geoffrey S. M. Hedrick 13D CIK 1959736 · Unknown · Aug 16, 2024	894,621	5.00%	-169,369	Aug 16, 2024
3	MARSHALL WACE, LLP 13F CIK 1318757 · Exempt reporting adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	691,799	3.87%	-61,578	Jun 30, 2026	carried, not yet filed for the newest quarter
4	Kevin P. Gilboy 13G CIK 2011442 · Unknown · Dec 2, 2024 Rule 13d-1(c), passive investor	664,155	3.71%	-1,019,013	Dec 2, 2024	Rule 13d-1(c), passive investor
5	VANGUARD CAPITAL MANAGEMENT LLC 13F CIK 2100119 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	629,425	3.52%	+3,650	Jun 30, 2026	carried, not yet filed for the newest quarter
6	PUNCH & ASSOCIATES INVESTMENT MANAGEMENT, INC. 13F CIK 1238990 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	569,963	3.18%	+51,345	Jun 30, 2026	carried, not yet filed for the newest quarter
7	MORGAN STANLEY 13F CIK 895421 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	503,365	2.81%	-99,882	Jun 30, 2026	carried, not yet filed for the newest quarter
8	Askarpour Shahram Insider CIK 1546928 · Aug 31, 2026 Director, Chief Executive Officer, issuer-wide	493,876	2.76%	-1,159	Aug 31, 2026	Director, Chief Executive Officer, issuer-wide
9	RENAISSANCE TECHNOLOGIES LLC 13F CIK 1037389 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	490,155	2.74%	+187,262	Jun 30, 2026	carried, not yet filed for the newest quarter
10	VANGUARD TOTAL STOCK MARKET INDEX FUND Fund S000002848 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	470,996	2.63%	0	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
11	DIMENSIONAL FUND ADVISORS LP 13F CIK 354204 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	411,427	2.30%	+43,160	Jun 30, 2026	carried, not yet filed for the newest quarter
11.1	U.S. SMALL CAP PORTFOLIO Fund S000000971 · Registered fund · Jul 31, 2026 DFA INVESTMENT DIMENSIONS GROUP INC, not summed	72,076	0.40%	+1,596	Jul 31, 2026	DFA INVESTMENT DIMENSIONS GROUP INC, not summed
11.2	U.S. MICRO CAP PORTFOLIO Fund S000000948 · Registered fund · Jul 31, 2026 DFA INVESTMENT DIMENSIONS GROUP INC, not summed	62,336	0.35%	+340	Jul 31, 2026	DFA INVESTMENT DIMENSIONS GROUP INC, not summed
11.3	Dimensional U.S. Small Cap ETF Fund S000070906 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	59,149	0.33%	0	Jul 31, 2026	Dimensional ETF Trust, not summed
11.4	Dimensional U.S. Core Equity 2 ETF Fund S000070903 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	50,809	0.28%	+13,517	Jul 31, 2026	Dimensional ETF Trust, not summed
11.5	U.S. CORE EQUITY 2 PORTFOLIO Fund S000000980 · Registered fund · Jul 31, 2026 DFA INVESTMENT DIMENSIONS GROUP INC, not summed	29,317	0.16%	0	Jul 31, 2026	DFA INVESTMENT DIMENSIONS GROUP INC, not summed
12	GEODE CAPITAL MANAGEMENT, LLC 13F CIK 1214717 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	354,083	1.98%	+208,027	Jun 30, 2026	carried, not yet filed for the newest quarter
13	CITADEL ADVISORS LLC 13F CIK 1423053 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	299,281	1.67%	+193,102	Jun 30, 2026	carried, not yet filed for the newest quarter
14	CenterBook Partners LP 13F CIK 1872738 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	264,954	1.48%	+264,954	Jun 30, 2026	carried, not yet filed for the newest quarter
15	Roubaix Capital, LLC 13F CIK 1769700 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	264,509	1.48%	+264,509	Jun 30, 2026	carried, not yet filed for the newest quarter
16	Qube Research & Technologies Ltd 13F CIK 1729829 · Exempt reporting adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	261,417	1.46%	+49,280	Jun 30, 2026	carried, not yet filed for the newest quarter
17	GABELLI FUNDS LLC 13F CIK 1081407 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	221,219	1.24%	+103,449	Jun 30, 2026	carried, not yet filed for the newest quarter
17.1	Keeley Small Cap Fund Fund S000001085 · Registered fund · Jun 30, 2026 Teton Westwood Funds, not summed	75,000	0.42%	—	Jun 30, 2026	Teton Westwood Funds, not summed
17.2	The Gabelli Small Cap Growth Fund Fund S000001062 · Registered fund · Jun 30, 2026 Gabelli Equity Series Funds Inc, not summed	58,000	0.32%	0	Jun 30, 2026	Gabelli Equity Series Funds Inc, not summed
17.3	Gabelli Commercial Aerospace and Defense Fund Fund S000069045 · Registered fund · Jun 30, 2026 Gabelli ETFs Trust, not summed	28,219	0.16%	+6,949	Jun 30, 2026	Gabelli ETFs Trust, not summed
17.4	Gabelli Global Mini Mites Fund Fund S000063160 · Registered fund · Jun 30, 2026 GAMCO Global Series Funds, Inc, not summed	22,000	0.12%	+18,500	Jun 30, 2026	GAMCO Global Series Funds, Inc, not summed
17.5	The Gabelli Asset Fund Fund S000001087 · Registered fund · Jun 30, 2026 Gabelli Asset Fund, not summed	20,000	0.11%	0	Jun 30, 2026	Gabelli Asset Fund, not summed
18	WealthTrust Axiom LLC 13F CIK 1425949 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	220,268	1.23%	+13,936	Jun 30, 2026	carried, not yet filed for the newest quarter
19	STATE STREET CORP 13F CIK 93751 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	189,261	1.06%	+130,668	Jun 30, 2026	carried, not yet filed for the newest quarter
19.1	STATE STREET SMALL/MID CAP EQUITY INDEX PORTFOLIO Fund S000050332 · Registered fund · Jun 30, 2026 STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed	5,000	0.03%	—	Jun 30, 2026	STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
19.2	State Street Total Return V.I.S. Fund Fund S000001637 · Registered fund · Jun 30, 2026 STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed	374	0.00%	—	Jun 30, 2026	STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed
20	ESSEX INVESTMENT MANAGEMENT CO LLC 13F CIK 201772 · Registered investment adviser · Sep 30, 2026	184,874	1.03%	+184,874	Sep 30, 2026
21	Hennion & Walsh Asset Management, Inc. 13F CIK 1861642 · Unknown · Sep 30, 2026	182,901	1.02%	-3,952	Sep 30, 2026
22	ISTHMUS PARTNERS, LLC 13F CIK 1639666 · Unknown · Sep 30, 2026	171,298	0.96%	+4,307	Sep 30, 2026
23	Connor, Clark & Lunn Investment Management Ltd. 13F CIK 1596800 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	168,061	0.94%	-2,792	Jun 30, 2026	carried, not yet filed for the newest quarter
24	BRESSNER GLEN R Insider CIK 902959 · Aug 31, 2026 Director, issuer-wide	156,155	0.87%	+2,500	Aug 31, 2026	Director, issuer-wide
25	Avantis U.S. Small Cap Value ETF Fund S000066459 · Registered fund · May 31, 2026 American Century ETF Trust, not summed	146,227	0.82%	+43,366	May 31, 2026	American Century ETF Trust, not summed
26	Man Group plc 13F CIK 1637460 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	142,100	0.79%	+61,511	Jun 30, 2026	carried, not yet filed for the newest quarter
27	Bank of New York Mellon Corp 13F CIK 1390777 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	140,640	0.79%	+84,869	Jun 30, 2026	carried, not yet filed for the newest quarter
28	VANGUARD EXTENDED MARKET INDEX FUND Fund S000002841 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	139,444	0.78%	-503	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
29	NORTH SQUARE DYNAMIC SMALL CAP FUND Fund S000063485 · Registered fund · May 31, 2026 Exchange Place Advisors Trust, not summed	137,161	0.77%	+2,160	May 31, 2026	Exchange Place Advisors Trust, not summed
30	GAMCO INVESTORS, INC. ET AL 13F CIK 807249 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	127,000	0.71%	+500	Jun 30, 2026	carried, not yet filed for the newest quarter
31	1290 VT GAMCO Small Company Value Portfolio Fund S000009151 · Registered fund · Jun 30, 2026 EQ Advisors Trust, not summed	125,000	0.70%	0	Jun 30, 2026	EQ Advisors Trust, not summed
32	ALGERT GLOBAL LLC 13F CIK 1275218 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	121,591	0.68%	-109,243	Jun 30, 2026	carried, not yet filed for the newest quarter
33	UBS Group AG 13F CIK 1610520 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	117,442	0.66%	+10,732	Jun 30, 2026	carried, not yet filed for the newest quarter
34	Teton Advisors, LLC 13F CIK 2086025 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	116,000	0.65%	+5,000	Jun 30, 2026	carried, not yet filed for the newest quarter
35	TETON Westwood Mighty Mites Fund Fund S000001084 · Registered fund · Jun 30, 2026 Teton Westwood Funds, not summed	116,000	0.65%	+5,000	Jun 30, 2026	Teton Westwood Funds, not summed
36	NORTHERN TRUST CORP 13F CIK 73124 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	114,979	0.64%	+73,807	Jun 30, 2026	carried, not yet filed for the newest quarter
36.1	Small Cap Index Fund Fund S000001245 · Registered fund · Jun 30, 2026 Northern Funds, not summed	7,663	0.04%	—	Jun 30, 2026	Northern Funds, not summed
37	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 13F CIK 1164508 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	113,116	0.63%	-163,207	Jun 30, 2026	carried, not yet filed for the newest quarter
38	Y-Intercept (Hong Kong) Ltd 13F CIK 1772875 · Exempt reporting adviser · Sep 30, 2026	112,474	0.63%	+27,722	Sep 30, 2026
39	AMERICAN CENTURY COMPANIES INC 13F CIK 748054 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	109,493	0.61%	-118,559	Jun 30, 2026	carried, not yet filed for the newest quarter
40	Squarepoint Ops LLC 13F CIK 1642575 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	103,780	0.58%	+55,513	Jun 30, 2026	carried, not yet filed for the newest quarter
41	VANGUARD PORTFOLIO MANAGEMENT LLC 13F CIK 2100121 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	102,919	0.58%	+102,919	Jun 30, 2026	carried, not yet filed for the newest quarter
42	JANE STREET GROUP, LLC 13F CIK 1595888 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	96,151	0.54%	-25,035	Jun 30, 2026	carried, not yet filed for the newest quarter
43	VANGUARD FIDUCIARY TRUST CO 13F CIK 933478 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	93,761	0.52%	+14,551	Jun 30, 2026	carried, not yet filed for the newest quarter
44	DiGiovanni Jeffrey Insider CIK 1752808 · Sep 30, 2026 Chief Financial Officer, issuer-wide	84,847	0.47%	-911	Sep 30, 2026	Chief Financial Officer, issuer-wide
45	Ancora Advisors LLC 13F CIK 1446114 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	84,740	0.47%	-20,110	Jun 30, 2026	carried, not yet filed for the newest quarter
45.1	Ancora/Thelen Small-Mid Cap Fund Fund S000039307 · Registered fund · Jun 30, 2026 ANCORA TRUST, not summed	27,940	0.16%	-10,000	Jun 30, 2026	ANCORA TRUST, not summed
46	Carolin Roger Anthony Insider CIK 1351909 · Apr 16, 2026 Director, issuer-wide	83,188	0.46%	+5,618	Apr 16, 2026	Director, issuer-wide
47	TUDOR INVESTMENT CORP ET AL 13F CIK 923093 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	79,726	0.45%	+79,726	Jun 30, 2026	carried, not yet filed for the newest quarter
48	Pekin Hardy Strauss, Inc. 13F CIK 1020317 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	79,200	0.44%	+9,250	Jun 30, 2026	carried, not yet filed for the newest quarter
49	KENNEDY CAPITAL MANAGEMENT LLC 13F CIK 884589 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	78,484	0.44%	+78,484	Jun 30, 2026	carried, not yet filed for the newest quarter
50	XTX Topco Ltd 13F CIK 1828301 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	76,440	0.43%	+39,221	Jun 30, 2026	carried, not yet filed for the newest quarter

14 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.

Showing 1–50 of 199 holders

Create a free account to page through every holder, filter by source and group by ultimate parent.

Key facts CIK 836690 CUSIP 45769N105 13F (30d) 13 filings 13 filers Visit website Investor relations