13F

Stock

Research Solutions, Inc.

RSSS · held by 39 managers

Reported value

$26.1M

Holders

39

+5 new · −7 exited

Holders’ est. mark

−$6.51M

Price effect on 31 books still in the name

Largest holder

$7.13M

NEEDHAM INVESTMENT MANAGEMENT LLC

Notable conviction

Share of each notable manager’s 13F book.

Holder count by quarter

Who holds it

Notable only
InvestorSharesValueEst. markChange
NEEDHAM INVESTMENT MANAGEMENT LLC3.15M$7.13M−$2.14MCut−$2.12M
PUNCH & ASSOCIATES INVESTMENT MANAGEMENT, INC.2.55M$5.77M−$1.7MCut−$1.58M
VANGUARD CAPITAL MANAGEMENT LLC1.13M$2.56MHeld
Luxor Capital Group, LP652K$1.47M−$443.3KCut−$443.3K
BARD ASSOCIATES INC608.4K$1.37M−$413.7KCut−$419.5K
Topline Capital Management, LLC461.2K$1.04M−$313.6KCut−$588K
PARTHENON LLC392.3K$886.6K−$266.8KCut−$266.8K
GEODE CAPITAL MANAGEMENT, LLC335.2K$757.6K−$195.8KCut−$89K
North Star Investment Management Corp.333.5K$753.8KNew
Dynamic Advisor Solutions LLC317.7K$718K−$196.9KCut−$133.2K
Navalign, LLC251.1K$567.5K−$67KAdded$277.7K
Renaissance Technologies176.9K$399.8K−$120.3KCut−$241.7K
VANGUARD FIDUCIARY TRUST CO151.4K$342.1KHeld
LPL Financial LLC146.3K$330.7K−$99.5KCut−$99.5K
BlackRock, Inc.120.2K$271.7K−$79.3KCut−$71.1K
Hillsdale Investment Management Inc.86K$194.4K−$58.5KCut−$93.8K
4Thought Financial Group Inc.83.4K$188.5K−$56.7KCut−$59K
DIMENSIONAL FUND ADVISORS LP78K$176.2K−$52.4KCut−$50.3K
Integrated Quantitative Investments LLC72.5K$163.8K−$49.3KCut−$49.3K
State Street58.8K$132.9K−$40KCut−$40K
NORTHERN TRUST CORP56.6K$128K−$38.5KCut−$38.5K
Rothschild Wealth LLC51.3K$115.9K−$34.9KCut−$933.1K
GOLDMAN SACHS GROUP INC46.6K$105.4K−$29.2KCut−$21K
Greenhaven Road Investment Management, L.P.38.5K$87K−$26.2KCut−$26.2K
Citadel35.7K$80.8K−$19.6KCut−$3.8K
KING LUTHER CAPITAL MANAGEMENT CORP35K$79.1K−$23.8KCut−$23.8K
SUSQUEHANNA INTERNATIONAL GROUP, LLP34.9K$78.8K−$23.7KCut−$62.3K
CHARLES SCHWAB INVESTMENT MANAGEMENT INC18.1K$40.8K−$12.3KCut−$12.3K
BOOTHBAY FUND MANAGEMENT, LLC16.3K$36.9KNew
XTX Topco Ltd12.7K$28.7K−$8.64KCut−$36K
STIFEL FINANCIAL CORP11K$24.9KNew
Financial Management Professionals, Inc.5.42K$12.2KNew
Vanguard Global Advisers, LLC5.36K$12.1KHeld
UBS Group AG3.72K$8.41K−$1.59KAdded$1.52K
Tower Research Capital LLC (TRC)1.27K$2.88K−$783Cut−$512
Allworth Financial LP104$236−$70Cut−$70
ACADIAN ASSET MANAGEMENT LLC65.8K$147−$44Cut−$78
Caitong International Asset Management Co., Ltd3$7New
WELLS FARGO & COMPANY/MN1$2−$1Cut−$1

Who left

Positions as of Q1 2026. 13F filings arrive up to 45 days after quarter-end and omit shorts. Values are quarter-end marks, as filed. Estimated mark is the price effect on shares still held — not realized P&L or investment advice.