Paper Trading — Mirror Portfolios — May 21, 2026
⚙ Live on the Leaderboard
Mirror These 5 Famous Investor Portfolios with $10,000
Bill Ackman, Cathie Wood, Tom Lee, Nancy Pelosi, Stan Druckenmiller — cloned from public disclosures, live on Yahoo Finance prices
Five new paper-trading portfolios just went live on our public leaderboard, each mirroring the most recently disclosed holdings of a famous investor or institution. Every portfolio starts at $10,000 of virtual cash, pays a 0.1% commission per trade, and is repriced every NYSE session against the actual Yahoo Finance close. We linked the original source on every portfolio so you can audit the trail back to the 13F filing, the periodic transaction report, or the X account that disclosed it. The leaderboard ranks them in real time alongside human-built portfolios. No signup required to look, no financial advice given.
Why Mirror Famous Investor Portfolios?
Following billion-dollar fund managers is one of the oldest retail strategies in the book. The 13F filing is a Securities and Exchange Commission disclosure that institutions managing more than $100 million must publish 45 days after quarter-end; periodic transaction reports (PTRs) from members of Congress publish individual trades on a rolling basis; and figures like Cathie Wood publish their fund's daily transactions via email and X. The result is that a meaningful slice of the smart-money universe is observable in near real time. The barrier is execution: assembling a clone portfolio on a real brokerage account costs commissions, requires capital, and forces position sizing decisions that diverge from the source.
Paper trading removes the cost and the capital barrier. With $10,000 of virtual cash and live Yahoo Finance prices on the close, every position behaves exactly like the original would in a brokerage. You can compare the mirrored portfolios against the S&P 500 and NASDAQ Composite benchmarks we publish daily, watch how the famous-name portfolios diverge over time, and decide for yourself whether the alpha is real. The mirror is not financial advice. It is a transparent learning tool.
The 5 Mirror Portfolios
BN 17.62%
AMZN 17.39%
UBER 15.71%
MSFT 15.26%
QSR 12.20%
Concentrated quality compounders. Ackman's Q1 2026 13F (filed May 18, 2026) shows roughly 78% of the $13.7B fund parked in just five names. Brookfield (BN) remains the cornerstone at ~19% of assets despite a modest trim. The fund boosted Amazon by 19% (1.84M shares added) and acquired 5.65M Microsoft shares ($2.09B) during the quarter. Hilton, Chipotle, and Canadian Pacific Kansas City were eliminated entirely.
Source:
@BillAckman on X · Pershing Square 13F SEC filing 2026-05-18 (Q1 2026 holdings)
TSLA
AMD
CRSP
SHOP
PLTR
HOOD
RBLX
COIN
Disruptive innovation thesis. Tesla remains the largest ARKK position even after recent trimming. The 5 largest names (Tesla, AMD, CRISPR, Shopify, Palantir) account for ~24% of fund assets, and over half of fund assets sit in the top 10. Q1 2026 stake increases included AMD, CRSP, TEM, HOOD, RBLX, AMZN, BLSH, GOOGL, and CRWV — signaling conviction across AI, genomics, and fintech themes. We track the 8 names highlighted here, equal-weighted.
AMD
PWR
MSTR
GOOGL
AMZN
AVGO
GEV
KLAC
Seven-theme quantitative tilt. Fundstrat's Granny Shots ETF (GRNY) blends three short-term themes (style tilt, seasonality, PMI recovery) with four long-term themes (millennials, global labor supply, energy & cybersecurity, easing financial conditions). The February 2026 rebalance added AMGN, APD, CVX, NOC, OKE, PKG, PPG, TPL, UNP and removed AXON, CRWD, EMR, EXPE, LRCX, PANW, SOFI, SPGI. Largest sector exposures: Information Technology 25%, Industrials 20%, Financials 15%. We mirror the top 8 holdings as of May 15, 2026 at equal weight.
NVDA
GOOGL
AMZN
AAPL
AB
Mega-cap LEAPS underlyings + one new financial. Rep. Nancy Pelosi's January 23, 2026 Periodic Transaction Report disclosed more than $10M in cumulative stock activity. The notable moves: massive reductions in mega-cap equity exposure (AAPL, NVDA, AMZN), then fresh long-dated call option purchases dated December 30, 2025 with January 2027 expirations on AAPL/AMZN/GOOGL/NVDA. Plus a new $1-5M direct buy of AllianceBernstein (AB) on January 16. Since paper trading doesn't support options, we mirror the LEAPS underlyings (treating each as a bullish long-equity proxy) plus the AB direct buy at equal weight.
NTRA
INSM
TSM
TEVA
GOOGL
PKB
Macro + biotech + AI infrastructure. Duquesne Family Office Q1 2026 13F (filed May 15, 2026) covers 70 holdings totaling $3.38B. Top holdings: Natera (NTRA), Insmed (INSM), TSM, the Invesco Building & Construction ETF (PKB), Teva (TEVA). The notable move was a 276.7% increase in Alphabet (GOOGL), bringing that position to ~$120.5M. We exclude the EWZ and RSP call options Duquesne held (paper trading is equity-only) and mirror the top 6 long-equity names at equal weight.
How the Mirror Portfolios Stay Honest
Every paper trading portfolio on the platform follows the same rules. Each portfolio starts with exactly $10,000 of virtual U.S. dollars. Trades execute at the latest Yahoo Finance close for the symbol. Commission is a flat 0.1% per trade, deducted from cash on the buy and from proceeds on the sell. There is no slippage, no margin, no shorting, and no fractional-share workaround for sub-dollar tickers — the same shape of constraint a serious self-directed retail account faces.
The five mirror portfolios were seeded with the listed weights using the live close on May 21, 2026. From here, the system reprices each position automatically at every NYSE session and writes a daily snapshot to the portfolio history table. Each portfolio's page shows the current return, total commission paid, a daily-snapshot chart against the NASDAQ Composite and S&P 500 benchmarks, and the original source link. The leaderboard ranks all public portfolios by total return so you can compare the mirror portfolios directly against human-built portfolios.
One important nuance about how we handle corporate actions: we now automatically detect and apply stock splits via Yahoo's official split history. When a mirrored name splits (e.g., a 10-for-1 like NVDA in 2024 or NFLX in late 2025), the system adjusts the position's share count and per-share buy price atomically before the next price refresh — so the portfolio's dollar value continues to track reality rather than ghost-crashing on the post-split tape. Dividends are not currently reinvested; that is on the roadmap. Reverse splits use the same math (shares scale down, buy price scales up). An audit trail of every applied split is stored in the database.
What This Lets You Do
The most useful thing about mirror portfolios is the comparison they enable. You can build your own portfolio on the leaderboard and watch how it tracks against Bill Ackman's concentrated long-duration thesis, Cathie Wood's high-volatility innovation basket, Tom Lee's quantitative seven-theme tilt, the congressional disclosure pattern, and Druckenmiller's macro-and-biotech mix — all simultaneously, all repriced on the same Yahoo close, all charted against the same NASDAQ and S&P 500 benchmarks. Over weeks and months, divergences accumulate. A pattern of consistent outperformance from one mirror over another tells you something about which factor exposures the market is paying for right now. A persistent underperformance is equally informative.
None of this is investment advice. The mirrors are not promises of future returns. They are transparent, real-time learning tools. Treat them like a benchmark, not a recommendation.
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