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RIO · GLW in the 13F filings

Two to four stocks side by side among the 95 tracked managers: who lists them, how that has moved, who bought and sold in a quarter, and which managers hold more than one.

RIOGLW
Quarter
Q2 2026Q1 2026Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023

Holders over time

Tracked managers listing each stock every quarter, at least, or their combined reported value. A gap is a quarter in which no tracked manager listed it. Click a quarter to compare there.
  • RIO
  • GLW
010203040202120222023202420252026
Holders and value by quarter
QuarterRIOGLW
Q3 202011 holders, $762m11 holders, $3.4bn
Q4 20209 holders, $867m18 holders, $3.6bn
Q1 202110 holders, $1.1bn11 holders, $4.6bn
Q2 20218 holders, $1.5bn16 holders, $4.0bn
Q3 202110 holders, $1.4bn14 holders, $3.2bn
Q4 202111 holders, $1.8bn16 holders, $3.1bn
Q1 202212 holders, $2.8bn18 holders, $2.6bn
Q2 202212 holders, $1.9bn14 holders, $2.3bn
Q3 202217 holders, $2.1bn14 holders, $1.6bn
Q4 202213 holders, $3.0bn12 holders, $1.7bn
Q1 202314 holders, $2.8bn18 holders, $2.3bn
Q2 202317 holders, $2.5bn10 holders, $1.9bn
Q3 202316 holders, $2.7bn8 holders, $1.4bn
Q4 202315 holders, $3.2bn12 holders, $1.6bn
Q1 202412 holders, $2.3bn11 holders, $2.2bn
Q2 20248 holders, $2.2bn11 holders, $3.3bn
Q3 20249 holders, $2.2bn17 holders, $4.3bn
Q4 20247 holders, $1.3bn22 holders, $4.1bn
Q1 202511 holders, $1.2bn24 holders, $3.1bn
Q2 202511 holders, $684m25 holders, $3.3bn
Q3 20256 holders, $384m26 holders, $6.2bn
Q4 20255 holders, $499m27 holders, $7.2bn
Q1 20267 holders, $681m33 holders, $12.8bn
Q2 202610 holders, $573m26 holders, $23.6bn
RIO

Rio Tinto

Holders
10
Reported value
$573m
Buyers
13
Sellers
14

Breadth -1 among 91 comparable managers.

Materials
GLW

Corning Inc

Holders
26
Reported value
$23.6bn
Buyers
16
Sellers
29

Breadth -13 among 91 comparable managers.

Materials

Who holds both, Q2 2026

Among the 34 tracked managers listing any of them. "Only" is about listed positions: a manager may hold the other below its listed range.

Only RIO (8)

Arrowstreet Capital LP, Baillie Gifford & Co, Bridgewater Associates LP, Farallon Capital Management LLC, Hudson Bay Capital Management LP, Quantbot Technologies LP, Renaissance Technologies LLC, Tudor Investment Corp

Only GLW (24)

Acadian Asset Management LLC, AllianceBernstein LP, AQR Capital Management LLC, Artisan Partners LP, Brevan Howard Capital Management LP, Capital Research Global Investors, Capital World Investors, Caxton Associates LLP, Fidelity (FMR LLC), Freestone Grove Partners LP, GAMCO Investors Inc, Invesco Ltd, Janus Henderson Group Ltd, Lone Pine Capital LLC, Marshall Wace LLP, Maverick Capital Ltd, MFS Investment Management, Rokos Capital Management LLP, Schonfeld Strategic Advisors LLC, T. Rowe Price Associates Inc, Verition Fund Management LLC, Wellington Management Group LLP, Whale Rock Capital Management LLC, Woodline Partners LP

How much of the picture this is

A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. Buyers and sellers count comparable managers (those that filed both quarters) by shares, so a rise in value with no rise in shares is the price. Large books are listed to their largest positions. These are 95 tracked managers, not the institutional market.

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