Massachusetts Financial Services Co holds a diversified book of 944 stocks worth $297.5B as of Q1 2026 (disclosed May 14, 2026, a ~44-day 13F lag). This quarter they opened Aptiv PLC-W/i and trimmed Nvidia Corp. Their largest long position is Nvidia Corp at 4% of the equity book. They also disclosed $1.3M in put options (a bearish bet) and $3.9M in call options (bullish), shown separately below and excluded from the equity book. Cloning the disclosed picks since 2013 would be +356% (+12.6%/yr). That is a simulation of the disclosed long book, not audited returns.
Following at the filing date actually beat the quarter-end book by 16.4 points over this window.
Growth of $10,000 cloning Massachusetts Financial Services Co's disclosed long 13F book, rebalanced on each filing date (so it reflects each quarter's actual reporting lag, ~44 days for the latest filing, with no look-ahead), total-return basis (dividends reinvested), derived from end-of-day prices. “Their reported book” values the same picks from quarter-end, before they were public. S&P 500 is SPY total return over the same window. Excludes shorts, cash, options and non-13F holdings. Not investment advice.
Top-heavy: diversified book
Share of the disclosed book in its largest positions. A higher top-5 share means a more concentrated, higher-conviction portfolio.
100% mapped to company sectors
Direct operating-company sectors from our SIC-based security master. ETF/fund and unclassified holdings stay visible separately; this is not ETF look-through exposure.
Estimated $ traded · quarter-end prices, no cost basis
Other tracked managers holding the same core names as Massachusetts Financial Services Co
| Manager / fund | Shared names | Their $ in those |
|---|---|---|
| BlackRock, Inc. | 80 / 80 | $2.2T |
| FMR LLC | 80 / 80 | $851.7B |
| JPMORGAN CHASE & CO | 80 / 80 | $534.0B |
| MORGAN STANLEY | 80 / 80 | $499.2B |
| BANK OF AMERICA CORP /DE/ | 80 / 80 | $328.7B |
| NORTHERN TRUST CORP | 80 / 80 | $297.7B |
| GOLDMAN SACHS GROUP INC | 80 / 80 | $229.6B |
| Bank of New York Mellon Corp | 80 / 80 | $202.5B |
Ranked by how many of Massachusetts Financial Services Co's top 80 disclosed names each fund also holds: a cross-fund conviction signal from the latest 13F of every tracked manager.
Bars show each stock's share of the portfolio. Click a row for its position history.
| # | Security | Value | Shares | % Port | Last move | History |
|---|---|---|---|---|---|---|
| 1 | Nvidia Corporation COM | $11.6B | 65.28M | 3.9% | ▼−2.8% Reduced · −1.9M sh | |
| 2 | Microsoft Corp COM | $10.7B | 25.47M | 3.6% | ▼−5.9% Reduced · −1.6M sh | |
| 3 | Apple Inc COM | $7.8B | 30.32M | 2.6% | ▲+13% Added · +3.4M sh | |
| 4 | Alphabet Inc CAP STK CL A | $7.0B | 23.41M | 2.3% | ▼−7.0% Reduced · −1.8M sh | |
| 5 | Amazon Com Inc COM | $6.6B | 25.95M | 2.2% | ▼−8.6% Reduced · −2.4M sh | |
| 6 | JPMorgan Chase & Co COM | $4.3B | 14.66M | 1.5% | ▼−5.5% Reduced · −857K sh | |
| 7 | Broadcom Inc COM | $3.4B | 8.98M | 1.1% | ▲+11% Added · +913K sh | |
| 8 | Taiwan Semiconductor Manufac SPONSORED ADS | $3.4B | 9.68M | 1.1% | ▼−4.6% Reduced · −469K sh | |
| 9 | Johnson & Johnson COM | $3.3B | 13.43M | 1.1% | ▼−18% Reduced · −3.0M sh | |
| 10 | The Cigna Group COM | $3.1B | 11.60M | 1.0% | ▼−1.8% Reduced · −210K sh | |
| 11 | Exxon Mobil Corp COM | $3.0B | 17.92M | 1.0% | ▼−6.9% Reduced · −1.3M sh | |
| 12 | Linde PLC SHS | $3.0B | 4.76M | 1.0% | ▼−7.0% Reduced · −358K sh | |
| 13 | Mastercard Incorporated CL A | $2.8B | 5.52M | 0.9% | ▼−6.0% Reduced · −349K sh | |
| 14 | Franco Nev Corp COM | $2.8B | 11.09M | 0.9% | ▼−5.1% Reduced · −595K sh | |
| 15 | RTX Corporation COM | $2.8B | 14.15M | 0.9% | ▼−0.1% Reduced · −15K sh | |
| 16 | Aon PLC SHS CL A | $2.8B | 8.36M | 0.9% | ▼−2.2% Reduced · −187K sh | |
| 17 | ConocoPhillips COM | $2.7B | 20.27M | 0.9% | ▼−9.3% Reduced · −2.1M sh | |
| 18 | Medtronic PLC SHS | $2.7B | 21.44M | 0.9% | ▲+2.3% Added · +490K sh | |
| 19 | UBS Group AG SHS | $2.6B | 65.54M | 0.9% | ▼−4.5% Reduced · −3.1M sh | |
| 20 | Willis Towers Watson PLC Ltd SHS | $2.6B | 5.87M | 0.9% | ▼−1.8% Reduced · −110K sh | |
| 21 | Meta Platforms Inc CL A | $2.6B | 4.41M | 0.9% | ▼−8.6% Reduced · −417K sh | |
| 22 | McKesson Corp COM | $2.5B | 2.90M | 0.8% | ▼−16% Reduced · −546K sh | |
| 23 | Accenture PLC Ireland SHS CLASS A | $2.5B | 9.83M | 0.8% | ▼−8.1% Reduced · −865K sh | |
| 24 | Honeywell Intl Inc COM | $2.5B | 8.71M | 0.8% | ▲+27% Added · +1.9M sh | |
| 25 | Agnico Eagle Mines Ltd COM | $2.5B | 11.87M | 0.8% | ▲+1.7% Added · +194K sh | |
| 26 | Nasdaq Inc COM | $2.5B | 29.06M | 0.8% | ▲+5.2% Added · +1.4M sh | |
| 27 | Kla Corp COM NEW | $2.4B | 1.64M | 0.8% | ▼−5.7% Reduced · −98K sh | |
| 28 | Progressive Corp COM | $2.4B | 12.10M | 0.8% | ▼−5.3% Reduced · −680K sh | |
| 29 | Visa Inc COM CL A | $2.3B | 4.17M | 0.8% | ▼−8.2% Reduced · −370K sh | |
| 30 | Schwab Charles Corp COM | $2.3B | 14.52M | 0.8% | ▼−5.5% Reduced · −845K sh | |
| 31 | Thermo Fisher Scientific Inc COM | $2.3B | 3.01M | 0.8% | ▼−2.4% Reduced · −75K sh | |
| 32 | Becton Dickinson & Co COM | $2.2B | 9.10M | 0.7% | ▼−4.1% Reduced · −385K sh | |
| 33 | Chubb Ltd Switz COM | $2.1B | 6.51M | 0.7% | ▼−5.4% Reduced · −372K sh | |
| 34 | Waters Corp COM | $2.1B | 4.63M | 0.7% | ▲+76% Added · +2.0M sh | |
| 35 | Analog Devices Inc COM | $2.0B | 6.22M | 0.7% | ▼−21% Reduced · −1.7M sh | |
| 36 | General Dynamics Corp COM | $2.0B | 5.70M | 0.7% | ▼−9.0% Reduced · −563K sh | |
| 37 | Morgan Stanley COM NEW | $1.9B | 11.75M | 0.6% | ▼−5.7% Reduced · −708K sh | |
| 38 | PG&E Corp COM | $1.9B | 109.39M | 0.6% | ▼−5.4% Reduced · −6.2M sh | |
| 39 | Duke Energy Corp New COM NEW | $1.9B | 14.39M | 0.6% | ▼−10% Reduced · −1.7M sh | |
| 40 | Prologis Inc. COM | $1.9B | 14.06M | 0.6% | ▼−6.2% Reduced · −929K sh | |
| 41 | Amphenol Corp CL A | $1.8B | 13.96M | 0.6% | ▼−12% Reduced · −1.9M sh | |
| 42 | Howmet Aerospace Inc COM | $1.8B | 7.62M | 0.6% | ▼−22% Reduced · −2.2M sh | |
| 43 | Union Pac Corp COM | $1.7B | 7.03M | 0.6% | ▼−7.6% Reduced · −576K sh | |
| 44 | Boeing Co COM | $1.7B | 8.73M | 0.6% | ▼−9.7% Reduced · −936K sh | |
| 45 | Eaton Corp PLC SHS | $1.7B | 4.69M | 0.6% | ▼−15% Reduced · −815K sh | |
| 46 | Dominion Energy Inc COM | $1.6B | 26.62M | 0.6% | ▼−4.8% Reduced · −1.3M sh | |
| 47 | Pfizer Inc COM | $1.6B | 56.91M | 0.5% | ▲+1.9% Added · +1.0M sh | |
| 48 | Abbott Laboratories COM | $1.6B | 15.50M | 0.5% | ▲+6.8% Added · +981K sh | |
| 49 | Transunion COM | $1.6B | 13.15M | 0.5% | ▼−15% Reduced · −2.4M sh | |
| 50 | PNC Finl Svcs Group Inc COM | $1.6B | 7.53M | 0.5% | ▼−12% Reduced · −1.0M sh |
The public view is the crawlable proof. The same sourced dataset is available through REST and MCP for agents, research scripts, and back-office tools.
This fund page is the Follow view. The Build view lets your agent pull holdings, quarter changes, overlap, and source filings through API or MCP.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/funds/912938/holdings"
Use Arkolith to show MASSACHUSETTS FINANCIAL SERVICES CO /MA/'s latest holdings, largest changes, and filing provenance.
Put / call positions from the 13F — totals include every disclosed option leg
| Type | Underlying | Notional value | Underlying shares |
|---|---|---|---|
| CALL · bullish | WELLTOWER INC | $3.9M | 1.2M |
| PUT · bearish | ISHARES TR | $1.3M | 476K |
13F filers disclose option positions at the market value of the underlying the contracts reference, not the premium paid. A put is a bearish bet (it gains if the stock falls); a call is bullish. “Underlying shares” is the share count the contracts control, not a share holding. These legs are excluded from the equity book, weighting, concentration and sector figures above.
As-of date vs the date the SEC received each filing
| Quarter | As of | Filed | Positions | Value | Form |
|---|---|---|---|---|---|
| Q1 2026 | Mar 31, 2026 | May 14, 2026 | 3,996 | $297.5B | 13F-HR |
| Q4 2025 | Dec 31, 2025 | Jan 22, 2026 | 3,918 | $310.1B | 13F-HR |
| Q3 2025 | Sep 30, 2025 | Oct 29, 2025 | 3,802 | $322.8B | 13F-HR |
| Q2 2025 | Jun 30, 2025 | Aug 8, 2025 | 3,634 | $315.1B | 13F-HR |
| Q1 2025 | Mar 31, 2025 | May 2, 2025 | 3,631 | $300.8B | 13F-HR |
| Q4 2024 | Dec 31, 2024 | Feb 12, 2025 | 3,379 | $316.9B | 13F-HR |
| Q3 2024 | Sep 30, 2024 | Nov 12, 2024 | 3,250 | $334.8B | 13F-HR |
| Q2 2024 | Jun 30, 2024 | Aug 9, 2024 | 3,274 | $325.3B | 13F-HR |
| Q1 2024 | Mar 31, 2024 | May 14, 2024 | 3,242 | $334.7B | 13F-HR |
| Q4 2023 | Dec 31, 2023 | Feb 8, 2024 | 3,283 | $309.6B | 13F-HR |
| Q3 2023 | Sep 30, 2023 | Nov 8, 2023 | 3,323 | $285.6B | 13F-HR |
| Q2 2023 | Jun 30, 2023 | Aug 9, 2023 | 3,260 | $304.6B | 13F-HR |
| Q1 2023 | Mar 31, 2023 | May 10, 2023 | 3,325 | $292.2B | 13F-HR |
| Q4 2022 | Dec 31, 2022 | Feb 13, 2023 | 3,381 | $286.5B | 13F-HR |
| Q3 2022 | Sep 30, 2022 | Nov 9, 2022 | 3,415 | $267.5B | 13F-HR |
| Q2 2022 | Jun 30, 2022 | Aug 9, 2022 | 3,384 | $290.1B | 13F-HR |
| Q1 2022 | Mar 31, 2022 | May 11, 2022 | 3,359 | $337.4B | 13F-HR |
| Q4 2021 | Dec 31, 2021 | Feb 10, 2022 | 3,461 | $365.3B | 13F-HR |
| Q3 2021 | Sep 30, 2021 | Nov 10, 2021 | 3,342 | $341.8B | 13F-HR |
| Q2 2021 | Jun 30, 2021 | Aug 13, 2021 | 3,345 | $343.3B | 13F-HR |
| Q1 2021 | Mar 31, 2021 | May 13, 2021 | 3,276 | $325.3B | 13F-HR |
| Q4 2020 | Dec 31, 2020 | May 12, 2021 | 3,047 | $311.5B | 13F-HR/A |
| Q3 2020 | Sep 30, 2020 | Nov 12, 2020 | 3,074 | $276.0B | 13F-HR |
Holdings from SEC EDGAR 13F-HR filings, updated quarterly, filed up to 45 days after quarter-end. Public domain. The book and weighting are long equity only; disclosed put/call options are listed separately and excluded from those totals. The performance line is a simulation of the disclosed long book, not an audited return.