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Institutional Ownership · SEC Form 13F

Who owns Quanex Building Products (NX)


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

165
Institutional holders
45M
Shares held (tracked funds)
98.9%
Of shares outstanding

How the tape is positioned

31 tracked funds added or opened NX while 25 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

NX’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 conviction gap — its largest holder concentrates the name more heavily than the typical one.

Book-share is each fund’s reported value in NX 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 165 tracked filers holding NX, 79 increased or opened the position and 95 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 NX 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 3

  • CRAMER ROSENTHAL MCGLYNN LLC$6M
  • Dynamic Technology Lab Private Ltd$862K
  • Tidal Investments LLC$634K

Full exits 10

  • LSV ASSET MANAGEMENT$14M
  • Trexquant Investment LP$2M
  • Linden Thomas Advisory Services, LLC$1M
  • GSA CAPITAL PARTNERS LLP$1M
  • Brevan Howard Capital Management LP$845K
  • SG Americas Securities, LLC$814K

Largest adds

  • AMERICAN CENTURY COMPANIES INC$19M
  • DIMENSIONAL FUND ADVISORS LP$7M
  • BlackRock, Inc.$6M
  • IES Holdings, Inc.$5M
  • SEGALL BRYANT & HAMILL, LLC$3M
  • VANGUARD PORTFOLIO MANAGEMENT LLC$2M

Largest trims

  • Allspring Global Investments Holdings, LLC$6M
  • ARROWSTREET CAPITAL, LIMITED PARTNERSHIP$6M
  • RENAISSANCE TECHNOLOGIES LLC$2M
  • GOLDMAN SACHS GROUP INC$2M
  • SEI INVESTMENTS CO$2M
  • XTX Topco Ltd$1M

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. added7,308,772$136M16.3%2026-Q2
AMERIPRISE FINANCIAL INC added2,735,839$51M6.1%2026-Q2
Allspring Global Investments Holdings, LLC trimmed2,383,553$43M5.1%2026-Q2
TPG GP A, LLC2,054,770$38M4.6%2026-Q2
DIMENSIONAL FUND ADVISORS LP added2,044,567$38M4.6%2026-Q2
VANGUARD CAPITAL MANAGEMENT LLC added2,020,981$38M4.5%2026-Q2
VANGUARD PORTFOLIO MANAGEMENT LLC added1,956,415$36M4.4%2026-Q2
DEPRINCE RACE & ZOLLO INC trimmed1,820,614$34M4.1%2026-Q2
SYSTEMATIC FINANCIAL MANAGEMENT LP added1,815,276$34M4.1%2026-Q2
STATE STREET CORP added1,801,860$34M4.0%2026-Q2
AMERICAN CENTURY COMPANIES INC added1,681,135$31M3.8%2026-Q2
SEGALL BRYANT & HAMILL, LLC added1,320,139$25M2.9%2026-Q2
GEODE CAPITAL MANAGEMENT, LLC added1,190,006$22M2.7%2026-Q2
IES Holdings, Inc. added1,079,603$20M2.4%2026-Q2
HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND1,000,000$19M2.2%2026-Q2
NOMURA HOLDINGS INC trimmed967,337$18M2.2%2026-Q2
CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed849,536$16M1.9%2026-Q2
RENAISSANCE TECHNOLOGIES LLC trimmed618,708$12M1.4%2026-Q2
Russell Investments Group, Ltd. trimmed541,534$10M1.2%2026-Q2
MORGAN STANLEY added522,902$10M1.2%2026-Q2
BANK OF AMERICA CORP /DE/ trimmed510,246$10M1.1%2026-Q2
First Eagle Investment Management, LLC trimmed474,211$9M1.1%2026-Q2
NORTHERN TRUST CORP added471,559$9M1.1%2026-Q2
ROYCE & ASSOCIATES LP added439,357$8M1.0%2026-Q2
Invesco Ltd. added410,928$8M0.9%2026-Q2
CRAMER ROSENTHAL MCGLYNN LLC new345,889$6M0.8%2026-Q2
CastleKnight Management LP trimmed320,640$6M0.7%2026-Q2
PRINCIPAL FINANCIAL GROUP INC added312,167$6M0.7%2026-Q2
VANGUARD FIDUCIARY TRUST CO added303,319$6M0.7%2026-Q2
BRIDGEWAY CAPITAL MANAGEMENT, LLC added301,621$6M0.7%2026-Q2
SEI INVESTMENTS CO trimmed269,825$5M0.6%2026-Q2
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP trimmed268,671$5M0.6%2026-Q2
Bank of New York Mellon Corp added266,752$5M0.6%2026-Q2
CIBC Bancorp USA Inc. added242,626$5M0.5%2026-Q2
GOLDMAN SACHS GROUP INC trimmed238,832$4M0.5%2026-Q2
AQR CAPITAL MANAGEMENT LLC trimmed222,333$4M0.5%2026-Q2
Empowered Funds, LLC added204,721$4M0.5%2026-Q2
MUFG Securities EMEA plc200,000$4M0.4%2026-Q2
Universal- Beteiligungs- und Servicegesellschaft mbH167,901$3M0.4%2026-Q2
Public Sector Pension Investment Board trimmed156,252$3M0.3%2026-Q2
WEDGE CAPITAL MANAGEMENT L L P/NC trimmed150,356$3M0.3%2026-Q2
ING GROEP NV150,000$3M0.3%2026-Q2
Nuveen, LLC added146,312$3M0.3%2026-Q2
Quantinno Capital Management LP added113,798$2M0.3%2026-Q2
RHUMBLINE ADVISERS trimmed113,341$2M0.3%2026-Q2
Legal & General Group Plc added107,412$2M0.2%2026-Q2
RAYMOND JAMES FINANCIAL INC trimmed104,514$2M0.2%2026-Q2
Villanova Investment Management Co LLC102,960$2M0.2%2026-Q2
Vanguard Global Advisers, LLC96,950$2M0.2%2026-Q2
VICTORY CAPITAL MANAGEMENT INC added88,000$2M0.2%2026-Q2
Swiss National Bank added82,944$2M0.2%2026-Q2
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC trimmed65,253$1M0.1%2026-Q2
Orion Porfolio Solutions, LLC added62,521$1M0.1%2026-Q2
XTX Topco Ltd trimmed60,968$1M0.1%2026-Q2
BARCLAYS PLC trimmed60,850$1M0.1%2026-Q2
NOMURA ASSET MANAGEMENT INTERNATIONAL INC.58,948$1M0.1%2026-Q2
CITIGROUP INC trimmed58,296$1M0.1%2026-Q2
DEUTSCHE BANK AG\ added57,736$1M0.1%2026-Q2
WELLS FARGO & COMPANY/MN added53,195$990K0.1%2026-Q2
MOODY NATIONAL BANK TRUST DIVISION added53,042$988K0.1%2026-Q2
Creative Planning trimmed51,854$966K0.1%2026-Q2
UBS Group AG added50,164$934K0.1%2026-Q2
New Age Alpha Advisors, LLC trimmed49,964$930K0.1%2026-Q2
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM added49,716$926K0.1%2026-Q2
FRANKLIN RESOURCES INC added49,152$915K0.1%2026-Q2
PRUDENTIAL FINANCIAL INC added47,949$893K0.1%2026-Q2
Dynamic Technology Lab Private Ltd trimmed46,304$862K0.1%2026-Q2
ALLIANCEBERNSTEIN L.P.45,707$821K0.1%2026-Q2
Rafferty Asset Management, LLC added43,028$801K0.1%2026-Q2
JPMORGAN CHASE & CO trimmed41,213$750K0.1%2026-Q2
Fisher Asset Management, LLC added39,947$744K0.1%2026-Q2
PRICE T ROWE ASSOCIATES INC /MD/ added38,227$712K0.1%2026-Q2
Corient Private Wealth LP added38,087$709K0.1%2026-Q2
CITADEL ADVISORS LLC added37,998$708K0.1%2026-Q2
Engineers Gate Manager LP added36,662$683K0.1%2026-Q2
Inspire Investing, LLC added36,657$683K0.1%2026-Q2
FIFTH THIRD BANCORP trimmed36,207$674K0.1%2026-Q2
Tidal Investments LLC new34,030$634K0.1%2026-Q2
LPL Financial LLC trimmed33,015$615K0.1%2026-Q2
MONETARY MANAGEMENT GROUP INC30,000$559K0.1%2026-Q2
ROYAL BANK OF CANADA added29,903$557K0.1%2026-Q2
Illinois Municipal Retirement Fund added28,956$539K0.1%2026-Q2
MetLife Investment Management, LLC added27,184$506K0.1%2026-Q2
HANCOCK WHITNEY CORP trimmed27,177$506K0.1%2026-Q2
VANGUARD ASSET MANAGEMENT, Ltd26,165$487K0.1%2026-Q2
Zurcher Kantonalbank (Zurich Cantonalbank) added24,674$459K0.1%2026-Q2
OSAIC HOLDINGS, INC. added22,575$420K0.1%2026-Q2
ENVESTNET ASSET MANAGEMENT INC added21,539$401K0.0%2026-Q2
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. trimmed21,429$399K0.0%2026-Q2
Louisiana State Employees Retirement System20,400$367K0.0%2026-Q2
Sound Capital Solutions LLC new20,176$376K0.0%2026-Q2
OPTIMIZE FINANCIAL INC. trimmed20,176$376K0.0%2026-Q2
NISA INVESTMENT ADVISORS, LLC added20,010$373K0.0%2026-Q2
Jupiter Topco LLC new18,365$342K0.0%2026-Q2
FOX RUN MANAGEMENT, L.L.C. trimmed18,204$339K0.0%2026-Q2
PNC Financial Services Group, Inc. added16,986$316K0.0%2026-Q2
SUSQUEHANNA INTERNATIONAL GROUP, LLP trimmed16,853$314K0.0%2026-Q2
Inscription Capital, LLC added16,214$302K0.0%2026-Q2
Quantbot Technologies LP trimmed15,960$297K0.0%2026-Q2
Man Group plc trimmed15,512$289K0.0%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