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The 13F price illusion: 102 stocks the market is misreading

When a fund's holding falls in value, did it sell, or did the price just drop?

What we found

We found 102 companies where the standard way of reading a 13F gives the wrong answer, including Nvidia, American Express and Bank of America. In each case the reported value moved one way and the actual share count moved the other.

Figure

Actual change in shares held

MSFT6%AXP1.4%OXY-1.5%AMAT-7.9%BAC2.1%SNDK-23.8%BKNG11.5%APP28.6%MCO5%SHOP1.8%BSX11.6%ADBE8.8%WDAY4.8%RDDT1.9%

Computed live from our database when you loaded this page. Nothing here is hand-typed, so nothing here can go stale.

TickerCompanyHeldValue changeShare countThe truth
MSFTMICROSOFT CORP$96.15bn-$22.38bn+6%Looks sold, actually bought
AXPAMERICAN EXPRESS CO$52.41bn-$10.79bn+1.4%Looks sold, actually bought
OXYOCCIDENTAL PETROLEUM CORP$24.22bn$8.66bn-1.5%Looks bought, actually sold
AMATAPPLIED MATERIALS INC$21.09bn$3.86bn-7.9%Looks bought, actually sold
BACBANK OF AMERICA CORP$36.48bn-$3.85bn+2.1%Looks sold, actually bought
SNDKSANDISK CORP$6.54bn$3.32bn-23.8%Looks bought, actually sold
BKNGBOOKING HOLDINGS INC$9.49bn-$2.74bn+11.5%Looks sold, actually bought
APPAPPLOVIN CORP-CLASS A$8.53bn-$2.7bn+28.6%Looks sold, actually bought
MCOMOODY'S CORP$21.45bn-$2.47bn+5%Looks sold, actually bought
SHOPSHOPIFY INC - CLASS A$7.05bn-$2.35bn+1.8%Looks sold, actually bought
BSXBOSTON SCIENTIFIC CORP$6.4bn-$2.31bn+11.6%Looks sold, actually bought
ADBEADOBE INC$6.64bn-$2.15bn+8.8%Looks sold, actually bought
WDAYWORKDAY INC-CLASS A$3.36bn-$1.94bn+4.8%Looks sold, actually bought
RDDTREDDIT INC-CL A$2.79bn-$1.88bn+1.9%Looks sold, actually bought
MELIMERCADOLIBRE INC$14.91bn-$1.65bn+4.9%Looks sold, actually bought
UNHUNITEDHEALTH GROUP INC$18.4bn-$1.45bn+13.1%Looks sold, actually bought
CPNGCOUPANG INC$6.56bn-$1.42bn+2.7%Looks sold, actually bought
HUMHUMANA INC$4.03bn-$1.28bn+12.1%Looks sold, actually bought
ISRGINTUITIVE SURGICAL INC$7.81bn-$1.26bn+5.8%Looks sold, actually bought
LRCXLAM RESEARCH CORP$9.35bn$1.22bn-7.8%Looks bought, actually sold
AAPLAPPLE INC$121bn-$1.2bn+6.1%Looks sold, actually bought
DVADAVITA INC$5.14bn$1.12bn-5.5%Looks bought, actually sold
NOWSERVICENOW INC$4.7bn-$1.04bn+19.9%Looks sold, actually bought
COSTCOSTCO WHOLESALE CORP$9.09bn$1.03bn-2.4%Looks bought, actually sold
CTSHCOGNIZANT TECH SOLUTIONS-A$3.64bn-$0.99bn+6.5%Looks sold, actually bought

Live from our database. 25 rows shown.

How we computed it
  • For every company held by our 105 funds, we compared Q4 2025 with Q1 2026 on two measures: total market value reported, and total SHARE COUNT held.
  • Value can move because a fund traded, or because the price moved. Share count moves only if somebody actually traded. It cannot lie.
  • We list every company where the two measures disagree on direction: value fell while shares rose, or value rose while shares fell.
  • Options positions (put and call lines) are excluded throughout. They are notional exposure, not ownership.
What this CANNOT tell you
  • This does not tell you WHY a fund traded. A rising share count can be conviction, an index fund tracking an index, or a market maker hedging.
  • 13F filings arrive up to 45 days after quarter end, so all of this is history by the time you read it.
  • 13Fs show long US equity positions only. Shorts, bonds, cash and foreign holdings are invisible, so no filing shows a fund's real net exposure.
Citation

Free to quote, chart or republish with attribution. Cite as: SteadyShares, The 13F price illusion: 102 stocks the market is misreading, https://steadyshares.com/research/the-13f-price-illusion. If you are a journalist and want the underlying query or a different cut of the data, ask and we will run it.

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Educational information, not financial advice, and not a recommendation to buy or sell anything. A late regulatory filing is a paperwork failure and nothing more: we make no allegation of wrongdoing against any person named on this page.