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Institutional Ownership · SEC Form 13F

Who owns Insteel Industries (IIIN)


Which tracked institutional funds hold IIIN, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See IIIN company fundamentals →

Ownership as of the 2026-Q2 13F filings (latest filed 2026-09-22). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.

179
Institutional holders
16M
Shares held (tracked funds)
80.9%
Of shares outstanding

How the tape is positioned

47 tracked funds added or opened IIIN while 52 trimmed or exited it between 2026-Q1 and 2026-Q2 — the tape is split. When large holders disagree on a name, the funds moving first are sometimes ahead of the story.

A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.

Conviction spread

IIIN’s largest tracked holder by dollar value, BlackRock, Inc., sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.0pp gap the other way — the median holder sizes IIIN more heavily than its largest holder by dollar value does.

Book-share is each fund’s reported value in IIIN divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.

Institutional & insider positioning

Between 2026-Q1 and 2026-Q2, across 179 tracked filers holding IIIN, 119 increased or opened the position and 106 reduced or closed it; over the same quarter, there were no open-market insider Form 4s.

This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.

New buyers & exits

Funds opening or closing a position in IIIN between the 2026-Q1 and 2026-Q2 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.

New buyers 14

  • Diamond Hill Capital Management, LLC (Investment Advisor)$9M
  • Walleye Capital LLC$2M
  • Jain Global LLC$2M
  • RAYMOND JAMES FINANCIAL INC$2M
  • BALYASNY ASSET MANAGEMENT L.P.$2M
  • TUDOR INVESTMENT CORP ET AL$2M

Full exits 22

  • SEGALL BRYANT & HAMILL, LLC$5M
  • LAZARD ASSET MANAGEMENT LLC$4M
  • Ancora Advisors LLC$4M
  • RENAISSANCE TECHNOLOGIES LLC$4M
  • PRINCIPAL FINANCIAL GROUP INC$3M
  • NFJ INVESTMENT GROUP, LLC$3M

Largest adds

  • JANE STREET GROUP, LLC$11M
  • AQR CAPITAL MANAGEMENT LLC$7M
  • Qube Research & Technologies Ltd$6M
  • CITADEL ADVISORS LLC$5M
  • ROBOTTI ROBERT$4M
  • D. E. Shaw & Co., Inc.$4M

Largest trims

  • BlackRock, Inc.$50M
  • STATE STREET CORP$12M
  • VANGUARD PORTFOLIO MANAGEMENT LLC$9M
  • Invesco Ltd.$6M
  • ALGERT GLOBAL LLC$6M
  • AMERICAN CENTURY COMPANIES INC$4M

Institutional holders

One row per tracked fund, most shares held first (every row is from one quarter; reported value breaks ties). “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding.

FundSharesReported value% of valueQuarter
BlackRock, Inc. trimmed1,523,656$46M9.8%2026-Q2
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. added1,199,958$36M7.7%2026-Q2
DIMENSIONAL FUND ADVISORS LP added1,169,892$35M7.5%2026-Q2
VANGUARD CAPITAL MANAGEMENT LLC added821,480$25M5.3%2026-Q2
GEODE CAPITAL MANAGEMENT, LLC added534,655$16M3.4%2026-Q2
First Eagle Investment Management, LLC added511,454$15M3.3%2026-Q2
ROBOTTI ROBERT added477,530$14M3.1%2026-Q2
JANE STREET GROUP, LLC added438,799$13M2.8%2026-Q2
CITADEL ADVISORS LLC added411,992$12M2.6%2026-Q2
STATE STREET CORP trimmed400,968$12M2.6%2026-Q2
Qube Research & Technologies Ltd added371,738$11M2.4%2026-Q2
Cerity Partners LLC added361,160$11M2.3%2026-Q2
ROYCE & ASSOCIATES LP added354,368$11M2.3%2026-Q2
Bruce & Co., Inc.343,423$10M2.2%2026-Q2
CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed311,980$9M2.0%2026-Q2
AQR CAPITAL MANAGEMENT LLC added301,372$9M1.9%2026-Q2
Diamond Hill Capital Management, LLC (Investment Advisor) new298,778$9M1.9%2026-Q2
OPPENHEIMER & CO INC added259,432$8M1.7%2026-Q2
Bank of New York Mellon Corp trimmed222,700$7M1.4%2026-Q2
JACOBS LEVY EQUITY MANAGEMENT, INC added210,954$6M1.4%2026-Q2
Oppenheimer & Close, LLC added200,178$6M1.3%2026-Q2
TWO SIGMA INVESTMENTS, LP added197,813$6M1.3%2026-Q2
VANGUARD PORTFOLIO MANAGEMENT LLC trimmed195,998$6M1.3%2026-Q2
NORTHERN TRUST CORP trimmed183,029$6M1.2%2026-Q2
GOLDMAN SACHS GROUP INC added170,518$5M1.1%2026-Q2
Owls Nest Partners IA, LLC added164,926$5M1.1%2026-Q2
MORGAN STANLEY trimmed158,499$5M1.0%2026-Q2
Russell Investments Group, Ltd. added153,989$5M1.0%2026-Q2
Bridge City Capital, LLC added147,520$4M0.9%2026-Q2
MILLENNIUM MANAGEMENT LLC added141,487$4M0.9%2026-Q2
CAPTRUST FINANCIAL ADVISORS added139,674$4M0.9%2026-Q2
ICON ADVISERS INC/CO added136,000$4M0.9%2026-Q2
D. E. Shaw & Co., Inc. added134,051$4M0.9%2026-Q2
VANGUARD FIDUCIARY TRUST CO trimmed127,781$4M0.8%2026-Q2
AMERICAN CENTURY COMPANIES INC trimmed113,922$3M0.7%2026-Q2
Nuveen, LLC added113,468$3M0.7%2026-Q2
SUSQUEHANNA INTERNATIONAL GROUP, LLP added106,302$3M0.7%2026-Q2
ISTHMUS PARTNERS, LLC added101,752$3M0.7%2026-Q2
Point72 Asset Management, L.P. added90,343$3M0.6%2026-Q2
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP added89,603$3M0.6%2026-Q2
Y-Intercept (Hong Kong) Ltd added87,204$3M0.6%2026-Q2
Numerai GP LLC added82,683$2M0.5%2026-Q2
Walleye Capital LLC added80,401$2M0.5%2026-Q2
CHATHAM CAPITAL GROUP, INC. added79,873$2M0.5%2026-Q2
BANK OF AMERICA CORP /DE/ trimmed77,905$2M0.5%2026-Q2
Jain Global LLC new77,758$2M0.5%2026-Q2
FIRST TRUST ADVISORS LP added65,779$2M0.4%2026-Q2
RAYMOND JAMES FINANCIAL INC added60,901$2M0.4%2026-Q2
BALYASNY ASSET MANAGEMENT L.P. added58,089$2M0.4%2026-Q2
Squarepoint Ops LLC added56,224$2M0.4%2026-Q2
Linden Thomas Advisory Services, LLC added54,808$2M0.4%2026-Q2
TUDOR INVESTMENT CORP ET AL added51,327$2M0.3%2026-Q2
VICTORY CAPITAL MANAGEMENT INC added51,000$2M0.3%2026-Q2
Catalyst Funds Management Pty Ltd new50,800$2M0.3%2026-Q2
Cardinal Capital Management added49,905$2M0.3%2026-Q2
KENNEDY CAPITAL MANAGEMENT LLC trimmed48,654$1M0.3%2026-Q2
WEDGE CAPITAL MANAGEMENT L L P/NC new48,130$1M0.3%2026-Q2
NEW YORK STATE COMMON RETIREMENT FUND added46,325$1M0.3%2026-Q2
Mountain Lake Investment Management LLC new44,260$1M0.3%2026-Q2
UBS Group AG added43,060$1M0.3%2026-Q2
Quantinno Capital Management LP added42,760$1M0.3%2026-Q2
GRACE & WHITE INC /NY added40,429$1M0.3%2026-Q2
SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC added39,575$1M0.3%2026-Q2
Cresset Asset Management, LLC39,231$1M0.3%2026-Q2
Quadrature Capital Ltd added37,550$1M0.2%2026-Q2
Connor, Clark & Lunn Investment Management Ltd. trimmed37,031$1M0.2%2026-Q2
ALGERT GLOBAL LLC trimmed36,380$1M0.2%2026-Q2
ExodusPoint Capital Management, LP added35,460$1M0.2%2026-Q2
PRICE T ROWE ASSOCIATES INC /MD/ added33,606$1M0.2%2026-Q2
Invesco Ltd. trimmed33,287$1M0.2%2026-Q2
CM WEALTH ADVISORS LLC new30,873$932K0.2%2026-Q2
AMERIPRISE FINANCIAL INC trimmed30,667$926K0.2%2026-Q2
Aquatic Capital Management LLC added28,444$859K0.2%2026-Q2
BNP PARIBAS FINANCIAL MARKETS added28,154$850K0.2%2026-Q2
RHUMBLINE ADVISERS trimmed24,284$733K0.2%2026-Q2
EntryPoint Capital, LLC added23,348$705K0.2%2026-Q2
Canal Capital Management, LLC added23,114$698K0.1%2026-Q2
HSBC HOLDINGS PLC added22,935$681K0.1%2026-Q2
XTX Topco Ltd new21,348$645K0.1%2026-Q2
Legato Capital Management LLC added20,584$622K0.1%2026-Q2
Jump Financial, LLC added19,498$589K0.1%2026-Q2
FRANKLIN RESOURCES INC added19,402$586K0.1%2026-Q2
SIMPLEX TRADING, LLC added19,057$576K0.1%2026-Q2
Unison Advisors LLC added18,757$566K0.1%2026-Q2
DEUTSCHE BANK AG\ trimmed18,507$559K0.1%2026-Q2
Brevan Howard Capital Management LP added18,186$549K0.1%2026-Q2
OSAIC HOLDINGS, INC. added17,758$536K0.1%2026-Q2
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO added17,426$526K0.1%2026-Q2
Boston Partners new16,748$506K0.1%2026-Q2
Schonfeld Strategic Advisors LLC new16,632$502K0.1%2026-Q2
ALLIANCEBERNSTEIN L.P. added16,140$542K0.1%2026-Q2
WELLS FARGO & COMPANY/MN added15,932$481K0.1%2026-Q2
ALPS ADVISORS INC added15,906$480K0.1%2026-Q2
CITIGROUP INC added15,015$453K0.1%2026-Q2
FIFTH THIRD BANCORP added14,968$452K0.1%2026-Q2
Corient Private Wealth LP trimmed14,561$440K0.1%2026-Q2
JPMORGAN CHASE & CO added12,443$376K0.1%2026-Q2
MetLife Investment Management, LLC added11,844$358K0.1%2026-Q2
CANADA PENSION PLAN INVESTMENT BOARD trimmed11,800$356K0.1%2026-Q2
SEI INVESTMENTS CO trimmed10,812$327K0.1%2026-Q2

Ownership over time

Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.

HoldersTotal shares

Reading this table

Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.

About 13F filings

A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.

Learn how to read institutional ownership