RSSS · Research Solutions, Inc. · Shareholders & Ownership

$1.86 +0.01 (+0.27%) At close · Nov 3 Play latest call Q3 2026 earnings call transcript

Market Cap

$64.15M

33.76M

Volume · Nov 3 25.07K Avg daily vol (3M) 35.82K

Every disclosed holder of RSSS 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 RSSS

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)	35	10,635,281	31.50%	Yes
Insiders (Forms 3, 4, 5)	7	2,512,039	7.44%	Yes
13D/G-only blocks	5	8,412,817	24.92%	Yes
Remaining	—	12,202,532	36.14%	Rest
Registered funds (N-PORT, not summed)	26	5,253,776	15.56%	No

Shares outstanding: 33,762,669, 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 RSSS

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	NEEDHAM INVESTMENT MANAGEMENT LLC 13F CIK 1167212 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	3,155,000	9.34%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
1.1	Needham Aggressive Growth Fund Fund S000003815 · Registered fund · Jun 30, 2026 Needham Funds Inc, not summed	3,155,000	9.34%	0	Jun 30, 2026	Needham Funds Inc, not summed
2	Witmer Richard H. 13G CIK 1490760 · Unknown · Dec 31, 2023 Rule 13d-1(c), passive investor, unconfirmed, last confirmed Dec 31, 2023	2,608,448	7.73%	—	Dec 31, 2023	Rule 13d-1(c), passive investor, unconfirmed, last confirmed Dec 31, 2023
3	PUNCH & ASSOCIATES INVESTMENT MANAGEMENT, INC. 13F CIK 1238990 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	2,552,455	7.56%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
4	Poplar Point Capital Management LLC 13G CIK 1588273 · Registered investment adviser · Mar 31, 2026 Rule 13d-1(b), qualified institution	2,329,374	6.90%	+551,973	Mar 31, 2026	Rule 13d-1(b), qualified institution
5	Cove Street Capital, LLC 13D CIK 1531612 · Unknown · Dec 3, 2024	1,907,961	5.65%	-478,941	Dec 3, 2024
6	Bristol Investment Fund, Ltd. 13D CIK 1174866 · Unknown · Dec 31, 2023 unconfirmed, last confirmed Dec 31, 2023	1,243,522	3.68%	—	Dec 31, 2023	unconfirmed, last confirmed Dec 31, 2023
7	VANGUARD CAPITAL MANAGEMENT LLC 13F CIK 2100119 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,147,020	3.40%	+13,549	Jun 30, 2026	carried, not yet filed for the newest quarter
8	VANGUARD TOTAL STOCK MARKET INDEX FUND Fund S000002848 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	826,297	2.45%	0	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
9	Luxor Capital Group, LP 13F CIK 1316580 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	651,959	1.93%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
10	BARD ASSOCIATES INC 13F CIK 1105907 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	608,979	1.80%	+577	Jun 30, 2026	carried, not yet filed for the newest quarter
11	OLIVIER ROY W Insider CIK 1375012 · Sep 19, 2025 Director, CEO & President, issuer-wide	606,825	1.80%	-1,428	Sep 19, 2025	Director, CEO & President, issuer-wide
12	AHLBERG SCOTT Insider CIK 1449752 · Jun 20, 2025 Chief Operating Officer, issuer-wide	543,549	1.61%	-933	Jun 20, 2025	Chief Operating Officer, issuer-wide
13	MCPEAK MERRILL A Insider CIK 1210317 · Nov 12, 2025 Director, issuer-wide	484,608	1.44%	+75,000	Nov 12, 2025	Director, issuer-wide
14	North Star Investment Management Corp. 13F CIK 1342857 · Investment adviser · Sep 30, 2026	410,000	1.21%	+53,000	Sep 30, 2026
15	Regazzi John J Insider CIK 1416849 · Nov 17, 2025 Director, issuer-wide	393,500	1.17%	+150,000	Nov 17, 2025	Director, issuer-wide
16	PARTHENON LLC 13F CIK 1088859 · Registered investment adviser · Sep 30, 2026	392,284	1.16%	0	Sep 30, 2026
17	NURTHEN WILLIAM Insider CIK 1388824 · Sep 19, 2025 CFO & Secretary, issuer-wide	378,382	1.12%	-2,225	Sep 19, 2025	CFO & Secretary, issuer-wide
18	North Star Micro Cap Fund Fund S000040440 · Registered fund · Aug 31, 2026 NORTHERN LIGHTS FUND TRUST II, not summed	357,000	1.06%	0	Aug 31, 2026	NORTHERN LIGHTS FUND TRUST II, not summed
19	Peter Derycz 13D CIK 1351848 · Unknown · Dec 5, 2024	323,512	0.96%	-2,025,224	Dec 5, 2024
20	GEODE CAPITAL MANAGEMENT, LLC 13F CIK 1214717 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	295,106	0.87%	-40,053	Jun 30, 2026	carried, not yet filed for the newest quarter
21	VANGUARD EXTENDED MARKET INDEX FUND Fund S000002841 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	287,067	0.85%	+24,788	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
22	The Adirondack Small Cap Fund Fund S000004764 · Registered fund · Mar 31, 2026 Adirondack Funds, not summed	196,979	0.58%	—	Mar 31, 2026	Adirondack Funds, not summed
23	Navalign, LLC 13F CIK 1820593 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	196,126	0.58%	-55,000	Jun 30, 2026	carried, not yet filed for the newest quarter
24	VANGUARD FIDUCIARY TRUST CO 13F CIK 933478 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	173,881	0.52%	+22,516	Jun 30, 2026	carried, not yet filed for the newest quarter
25	LPL Financial LLC 13F CIK 1403438 · Broker-dealer · Jun 30, 2026 carried, not yet filed for the newest quarter	146,307	0.43%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
26	BlackRock, Inc. 13F CIK 2012383 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	143,288	0.42%	+23,050	Jun 30, 2026	carried, not yet filed for the newest quarter
26.1	iShares Micro-Cap ETF Fund S000004439 · Registered fund · Jun 30, 2026 iShares Trust, not summed	92,763	0.27%	+21,610	Jun 30, 2026	iShares Trust, not summed
27	Fidelity Extended Market Index Fund Fund S000006021 · Registered fund · Aug 31, 2026 Fidelity Concord Street Trust, not summed	135,403	0.40%	-30,931	Aug 31, 2026	Fidelity Concord Street Trust, not summed
28	RENAISSANCE TECHNOLOGIES LLC 13F CIK 1037389 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	105,990	0.31%	-70,910	Jun 30, 2026	carried, not yet filed for the newest quarter
29	4Thought Financial Group Inc. 13F CIK 1840261 · Unknown · Sep 30, 2026	83,406	0.25%	0	Sep 30, 2026
30	DIMENSIONAL FUND ADVISORS LP 13F CIK 354204 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	82,442	0.24%	+4,480	Jun 30, 2026	carried, not yet filed for the newest quarter
30.1	U.S. VECTOR EQUITY PORTFOLIO Fund S000000982 · Registered fund · Jul 31, 2026 DFA INVESTMENT DIMENSIONS GROUP INC, not summed	5,649	0.02%	—	Jul 31, 2026	DFA INVESTMENT DIMENSIONS GROUP INC, not summed
30.2	Dimensional US Vector Equity ETF Fund S000086501 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	4,934	0.01%	—	Jul 31, 2026	Dimensional ETF Trust, not summed
30.3	U.S. MICRO CAP PORTFOLIO Fund S000000948 · Registered fund · Jul 31, 2026 DFA INVESTMENT DIMENSIONS GROUP INC, not summed	4,781	0.01%	0	Jul 31, 2026	DFA INVESTMENT DIMENSIONS GROUP INC, not summed
30.4	U.S. CORE EQUITY 1 PORTFOLIO Fund S000000979 · Registered fund · Jul 31, 2026 DFA INVESTMENT DIMENSIONS GROUP INC, not summed	4,309	0.01%	0	Jul 31, 2026	DFA INVESTMENT DIMENSIONS GROUP INC, not summed
30.5	Dimensional US Sustainability Core 1 ETF Fund S000076639 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	3,943	0.01%	0	Jul 31, 2026	Dimensional ETF Trust, not summed
31	Cohen Sefton Insider CIK 2044787 · Jul 31, 2026 Chief Revenue Officer, issuer-wide	75,933	0.22%	-284,000	Jul 31, 2026	Chief Revenue Officer, issuer-wide
32	Integrated Quantitative Investments LLC 13F CIK 2046834 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	72,500	0.21%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
33	NORTHERN TRUST CORP 13F CIK 73124 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	61,042	0.18%	+4,423	Jun 30, 2026	carried, not yet filed for the newest quarter
34	STATE STREET CORP 13F CIK 93751 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	58,807	0.17%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
35	Rothschild Wealth LLC 13F CIK 1811345 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	51,300	0.15%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
36	Fidelity Total Market Index Fund Fund S000006026 · Registered fund · Aug 31, 2026 Fidelity Concord Street Trust, not summed	45,632	0.14%	0	Aug 31, 2026	Fidelity Concord Street Trust, not summed
37	GOLDMAN SACHS GROUP INC 13F CIK 886982 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	44,008	0.13%	-2,619	Jun 30, 2026	carried, not yet filed for the newest quarter
38	Greenhaven Road Investment Management, L.P. 13F CIK 1741129 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	38,477	0.11%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
39	Fidelity Series Total Market Index Fund Fund S000065248 · Registered fund · Aug 31, 2026 Fidelity Concord Street Trust, not summed	38,424	0.11%	0	Aug 31, 2026	Fidelity Concord Street Trust, not summed
40	KING LUTHER CAPITAL MANAGEMENT CORP 13F CIK 310051 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	35,000	0.10%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
41	Kutil David Insider CIK 2102469 · Dec 19, 2025 CFO & Secretary, issuer-wide	29,242	0.09%	—	Dec 19, 2025	CFO & Secretary, issuer-wide
42	ACADIAN ASSET MANAGEMENT LLC 13F CIK 916542 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	28,985	0.09%	-36,850	Jun 30, 2026	carried, not yet filed for the newest quarter
43	CITADEL ADVISORS LLC 13F CIK 1423053 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	28,003	0.08%	-7,737	Jun 30, 2026	carried, not yet filed for the newest quarter
44	NewEdge Advisors, LLC 13F CIK 1633516 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	25,904	0.08%	+25,904	Jun 30, 2026	carried, not yet filed for the newest quarter
45	VANGUARD INSTITUTIONAL TOTAL STOCK MARKET INDEX FUND Fund S000002855 · Registered fund · Jun 30, 2026 VANGUARD INSTITUTIONAL INDEX FUNDS, not summed	18,808	0.06%	0	Jun 30, 2026	VANGUARD INSTITUTIONAL INDEX FUNDS, not summed
46	CHARLES SCHWAB INVESTMENT MANAGEMENT INC 13F CIK 884546 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	18,069	0.05%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
46.1	Schwab Total Stock Market Index Fund Fund S000005913 · Registered fund · Jul 31, 2026 SCHWAB CAPITAL TRUST, not summed	18,069	0.05%	0	Jul 31, 2026	SCHWAB CAPITAL TRUST, not summed
47	Fidelity Nasdaq Composite Index Fund Fund S000055366 · Registered fund · Aug 31, 2026 Fidelity Concord Street Trust, not summed	16,973	0.05%	0	Aug 31, 2026	Fidelity Concord Street Trust, not summed
48	VANGUARD BALANCED INDEX FUND Fund S000002560 · Registered fund · Jun 30, 2026 VANGUARD VALLEY FORGE FUNDS, not summed	14,848	0.04%	-11,239	Jun 30, 2026	VANGUARD VALLEY FORGE FUNDS, not summed
49	Topline Capital Management, LLC 13F CIK 1792549 · Investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	11,430	0.03%	-449,747	Jun 30, 2026	carried, not yet filed for the newest quarter
50	UBS Group AG 13F CIK 1610520 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	6,588	0.02%	+2,865	Jun 30, 2026	carried, not yet filed for the newest quarter

5 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 60 holders

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Key facts CIK 1386301 CUSIP 761025105 13F (30d) 4 filings 4 filers Visit website Investor relations