Crowding Tracker: Hedge Funds, Family Offices & Endowments
As of Q1 2026, AMZN (Amazon.com) is the most institutionally crowded stock in the 13F universe, held by 109 funds.
Pactolio’s crowding tracker ranks the 150 most-held stocks reported in SEC Form 13F filings across 348 institutional investors, with quarterly history back to Q1 2016.
Top 15 Most Crowded StocksQ1 2026
Ranked by the number of distinct institutions holding the name from SEC Form 13F-HR filings · change versus Q4 2025.
| # | Ticker / Company | Sector | Funds | Δ QoQ | Median Wt | Trend |
|---|---|---|---|---|---|---|
| 1 | AMZNAMAZON.COM | Consumer Cyclical | 109 | ↓ 5 | 6.5% | |
| 2 | GOOGLALPHABET CL A | Communication Services | 83 | ↓ 5 | 4.3% | |
| 3 | MSFTMICROSOFT | Technology | 80 | ↓ 15 | 3.5% | |
| 4 | TSMTAIWAN SEMIC-ADR | Technology | 79 | ↓ 1 | 4.8% | |
| 5 | METAMETA PLATFORMS INC | Communication Services | 75 | ↑ 1 | 4.5% | |
| 6 | NVDANVIDIA CORPORATION COM | Technology | 73 | ↑ 2 | 5.0% | |
| 7 | GOOGALPHABET CL C | Communication Services | 64 | ↑ 2 | 4.9% | |
| 8 | VVISA | Financial Services | 59 | ↑ 5 | 4.1% | |
| 9 | MAMASTERCARD INCORPORATED | Financial Services | 39 | ↑ 3 | 4.1% | |
| 10 | AVGOBROADCOM | Technology | 38 | 0 | 2.7% | |
| 11 | AAPLAPPLE | Technology | 35 | 0 | 2.1% | |
| 12 | BRK/BBERKSHIRE HATHAWAY B | Financial Services | 33 | ↑ 2 | 2.1% | |
| 13 | ASMLASML HLDG NV | Technology | 33 | ↑ 10 | 3.9% | |
| 14 | CPNGCOUPANG INC | Consumer Cyclical | 32 | ↑ 4 | 5.5% | |
| 15 | NFLXNETFLIX INC. | Communication Services | 31 | ↓ 1 | 2.2% |
Interactive 3D Crowding Universe
Visualize structural ownership trends across hedge funds, family offices, and endowments over time. Each data point represents a stock-quarter: the X-axis tracks time, the Y-axis tracks the number of distinct institutional entities holding the position, and the Z-axis segments equities by sector.
Drag to rotate, scroll to zoom, and hover for specific institutional-count details. Click any sphere to view that stock's complete ownership profile. Press play on the timeline to watch crowding build quarter by quarter.
The in-chart leaderboard displays the most crowded names for the current view; click a row to highlight its trajectory, and use ticker links to open each stock's holders page. Select a sector to isolate trajectory lines for its top five equities.
Methodology & FAQ
What is Stock Crowding?
Stock crowding is when a large share of institutional capital — hedge funds, family offices, and endowments — is concentrated in the same equity.
What does Stock Crowding tell us?
Crowding describes consensus. A high fund count means many managers hold the same name, which cuts both ways: crowded stocks benefit from sustained institutional demand, but are also exposed to sharper drawdowns when that consensus unwinds, because many holders head for the exit at once.
How is crowding tracked across Hedge Funds, Family Offices, and Endowments?
Crowding metrics are derived by aggregating SEC Form 13F-HR filings submitted by institutional investment managers. For each security, we count the number of distinct filers reporting a long position and calculate the median portfolio weight across those filers. Every filer counts equally: a $50B hedge fund and a $500M family office each add one holder. The ranking therefore reflects breadth of consensus rather than size of capital.
What are the primary metrics for measuring stock concentration?
Our platform tracks two core indicators:
- Distinct Institutional Count: The number of unique funds holding a position.
- Median Portfolio Concentration: The position's weight relative to the fund's total reported 13F market value.
Which stocks are included in the hedge fund crowding tracker?
The tracker covers the top 150 securities by distinct institutional holder count, drawn from SEC Form 13F filings. The universe is recalculated each quarter so that newly crowded names enter and faded positions exit, reflecting current institutional consensus rather than a static index.
Which stocks have been most crowded by hedge funds historically?
The All Time view ranks every stock in the 13F universe by its single highest distinct fund count across all reporting quarters since 2016. Each stock is evaluated independently, so the list captures the all-time record for each name rather than the top holdings of any single quarter. The peak quarter and the median portfolio weight at that time are shown alongside the fund count.
Based on our full history, the five stocks with the highest all-time institutional holder counts are: AMZN (Amazon.com), META (Meta Platforms), MSFT (Microsoft), GOOGL (Alphabet Cl a), TSM (Taiwan Semic-Adr).
Do the most institutionally crowded stocks stay crowded over time?
Not always. The 3D Crowding Universe visualises the full quarterly trajectory of the top holdings since 2016. The ten highlighted stocks are the current most-crowded names. When a historically peak-crowded name is still in that highlighted set, it signals durable institutional consensus across multiple market cycles, which is a different and stronger signal than a single-quarter crowding spike.