CIK: 0000912938
Total reported value
$297.5B
Reporting period: 2026-03-31 · Number of holdings: 3996
MASSACHUSETTS FINANCIAL SERVICES CO /MA/ disclosed 3996 holdings in its latest 13F filing for the period ending 2026-03-31, with total reported value of $297.5B and a quarterly turnover rate of 22.1%.
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Massachusetts Financial Services Co /ma/'s disclosed holdings carry a Herfindahl concentration index of 0.009 — mathematically equivalent to about 115 equally-sized positions, well below its 3996 actual disclosed holdings. That gap points to a strategy built around a small core of high-conviction bets rather than broad diversification.
Position sizes vary widely across the portfolio (a coefficient of variation of 2.69), with a handful of outsized bets alongside many smaller positions.
No strong tilt toward either adding to existing winners or initiating outsized new positions was observed in the latest reported quarter.
Trim TTE
-99.1% -$2.6B
Trim MSFT
-5.9% -$2.4B
Add HON
+27.2% $1.2B
Add WAT
+76.4% $1.1B
Trim KKR
-23.1% -$1.0B
Add LIN
-7.0% $841.7M
MFS is executing a systematic momentum-driven capital rotation, trimming oversized positions in mega-cap tech (MSFT, NVDA, GOOGL) to harvest gains and redeploying into emerging momentum names in industrials (HON) and life sciences (WAT). This is not a defensive shift but a tactical rebalancing within their momentum factor framework, hunting alpha by rotating into higher-beta momentum plays while maintaining extreme diversification.
The momentum tilt (100/100) signals a conviction that recent relative performance trends will persist — essentially a bet on 'more of the same' in market leadership. However, by trimming MSFT, NVDA, GOOGL while adding HON and WAT, MFS is pricing in an intra-market rotation from large-cap tech into industrial and healthcare momentum, potentially anticipating a regime of broadening leadership. The opposing thesis is that this rotation is already crowded and that these late-cycle momentum shifts are vulnerable to a sudden reversal when liquidity tightens.
Despite extreme diversification (HHI 0.87, 946 holdings), MFS's systematic momentum strategy carries a concentrated factor risk: they are effectively net long a consensus factor that has been the dominant source of returns. The moment momentum turns, the entire portfolio becomes highly correlated on the downside. Moreover, the reduction of their largest position from 0.85% to near zero suggests a mechanical stop-loss that may have been triggered by volatility — a reminder that even diversified momentum portfolios can suffer abrupt drawdowns when factor crowding unwinds.
Produced with AI assistance from publicly disclosed 13F data. Historical only; not a personalized investment recommendation.
Showing top 200 holdings (of 3996 total)
| # | Ticker | Issuer | Asset Subclass | Weight | Weight Change | Shares Change | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | NVDA | Nvidia CORP | Stock-Tech | 3.89% | -0.15% | -2.80% | |
| 2 | MSFT | Microsoft CORP | Stock-Tech | 3.59% | -0.63% | -5.90% | |
| 3 | AAPL | Apple INC | Stock-Tech | 2.64% | +0.28% | +12.72% | |
| 4 | GOOGL | Alphabet Inc-cl A | Stock-Comm Services | 2.34% | -0.20% | -7.05% | |
| 5 | AMZN | Amazon.com INC | Stock-Consumer Disc | 2.21% | — | -8.57% | |
| 6 | JPM | Jpmorgan Chase & Co | Stock-Financials | 1.46% | -0.15% | -5.52% | |
| 7 | AVGO | Broadcom INC | Stock-Tech | 1.15% | +0.25% | +11.31% | |
| 8 | TSM | Taiwan Semiconductor-sp Adr | Stock-Tech | 1.15% | — | -4.63% | |
| 9 | JNJ | Johnson & Johnson | Stock-Healthcare | 1.12% | — | -18.03% | |
| 10 | CI | THE Cigna Group | Stock-Healthcare | 1.05% | — | -1.78% | |
| 11 | XOM | Exxon Mobil CORP | Stock-Energy | 1.03% | +0.27% | -6.92% | |
| 12 | LIN | Linde plc | Stock-Materials | 1.02% | +0.32% | -7.00% | |
| 13 | MA | Mastercard INC - A | Stock-Financials | 0.95% | -0.13% | -5.95% | |
| 14 | FNV | Franco-nevada CORP | Stock-Materials | 0.95% | +0.17% | -5.09% | |
| 15 | RTX | Rtx CORP | Stock-Industrials | 0.93% | — | -0.10% | |
| 16 | AON | Aon plc | Stock-Financials | 0.93% | — | -2.19% | |
| 17 | COP | Conocophillips | Stock-Energy | 0.91% | +0.24% | -9.27% | |
| 18 | MDT | Medtronic plc | Stock-Healthcare | 0.89% | +0.24% | +2.34% | |
| 19 | UBS | UBS Group AG | Stock-Financials | 0.88% | -0.15% | -4.49% | |
| 20 | WTW | Willis Towers Watson Public Limited Company | Stock-Financials | 0.87% | +0.24% | -1.84% | |
| 21 | META | Meta Platforms Inc-class A | Stock-Comm Services | 0.87% | -0.17% | -8.64% | |
| 22 | MCK | Mckesson CORP | Stock-Healthcare | 0.85% | — | -15.84% | |
| 23 | ACN | Accenture plc | Stock-Tech | 0.85% | -0.08% | -8.09% | |
| 24 | HON | Honeywell International INC | Stock-Industrials | 0.85% | +0.42% | +27.17% | |
| 25 | AEM | Agnico Eagle Mines LTD | Stock-Materials | 0.84% | +0.20% | +1.66% | |
| 26 | NDAQ | Nasdaq INC | Stock-Financials | 0.83% | — | +5.19% | |
| 27 | KLAC | Kla CORP | Stock-Tech | 0.82% | — | -5.66% | |
| 28 | PGR | Progressive CORP | Stock-Financials | 0.81% | -0.13% | -5.32% | |
| 29 | V | Visa Inc-class A Shares | Stock-Financials | 0.78% | +0.27% | -8.15% | |
| 30 | SCHW | Schwab (charles) CORP | Stock-Financials | 0.76% | +0.26% | -5.50% | |
| 31 | TMO | Thermo Fisher Scientific INC | Stock-Healthcare | 0.76% | +0.18% | -2.41% | |
| 32 | BDX | Becton Dickinson And Co | Stock-Healthcare | 0.75% | +0.16% | -4.06% | |
| 33 | CB | Chubb Limited | Stock-Financials | 0.72% | — | -5.40% | |
| 34 | WAT | Waters CORP | Stock-Healthcare | 0.69% | +0.37% | +76.40% | |
| 35 | ADI | Analog Devices INC | Stock-Tech | 0.67% | — | -21.25% | |
| 36 | GD | General Dynamics CORP | Stock-Industrials | 0.67% | — | -8.98% | |
| 37 | MS | Morgan Stanley | Stock-Financials | 0.65% | — | -5.69% | |
| 38 | PCG | P G & E CORP | Stock-Utilities | 0.65% | — | -5.38% | |
| 39 | DUK | Duke Energy CORP | Stock-Utilities | 0.64% | — | -10.30% | |
| 40 | PLD | Prologis INC | Stock-Real Estate | 0.63% | — | -6.19% | |
| 41 | APH | Amphenol Corp-cl A | Stock-Tech | 0.62% | — | -12.24% | |
| 42 | HWM | Howmet Aerospace INC | Stock-Industrials | 0.60% | — | -22.28% | |
| 43 | UNP | Union Pacific CORP | Stock-Industrials | 0.59% | — | -7.57% | |
| 44 | BA | Boeing Co/the | Stock-Industrials | 0.58% | -0.10% | -9.68% | |
| 45 | ETN | Eaton Corporation plc | Stock-Industrials | 0.58% | — | -14.80% | |
| 46 | D | Dominion Energy INC | Stock-Utilities | 0.55% | — | -4.77% | |
| 47 | PFE | Pfizer INC | Stock-Healthcare | 0.55% | — | +1.86% | |
| 48 | ABT | Abbott Laboratories | Stock-Healthcare | 0.54% | — | +6.75% | |
| 49 | TRU | Transunion | Stock-Financials | 0.54% | — | -15.40% | |
| 50 | PNC | Pnc Financial Services Group | Stock-Financials | 0.53% | — | -11.80% |
Performance for Q3 2026
+3%
Performance Last 4 Quarters
+13.9%
Based on 76% of reported portfolio value with available pricing
| Period | Holdings | Total value | Stability | Top holdings |
|---|---|---|---|---|
| 2026-03-31 | 3996 | $297.5B | 22 | |
| 2025-12-31 | 3918 | $310.1B | 18 | |
| 2025-09-30 | 3802 | $322.8B | 31 | |
| 2025-06-30 | 3634 | $315.1B | 0 | |
| 2025-03-31 | 3631 | $300.8B | 100 | |
| 2024-12-31 | 3379 | $316.9B | 0 | |
| 2024-09-30 | 3250 | $334.8B | 0 | |
| 2024-06-30 | 3274 | $325.3B | 0 | |
| 2024-03-31 | 3242 | $334.7B | 0 | |
| 2023-12-31 | 3283 | $309.6B | 0 | |
| 2023-09-30 | 3323 | $285.6B | 0 | |
| 2023-06-30 | 3260 | $304.6B | 0 | |
| 2023-03-31 | 3325 | $292.2B | 0 | |
| 2022-12-31 | 3381 | $286.5B | 0 | |
| 2022-09-30 | 3415 | $267.5B | 0 | |
| 2022-06-30 | 3384 | $290.1B | 0 | |
| 2022-03-31 | 3359 | $337.4B | 0 | |
| 2021-12-31 | 3461 | $365.3B | 0 | |
| 2021-09-30 | 3342 | $341.8B | 0 | |
| 2021-06-30 | 3345 | $343.3B | 97 | |
| 2021-03-31 | 3276 | $325.3B | 13 | |
| 2020-12-31 | 3047 | $311.5B | 18 | |
| 2020-09-30 | 3074 | $276.0B | 16 | |
| 2020-06-30 | 2961 | $253.6B | 29 | |
| 2020-03-31 | 3081 | $209.8B | 30 | |
| 2019-12-31 | 3049 | $266.1B | 14 | |
| 2019-09-30 | 3221 | $249.1B | 12 | |
| 2019-06-30 | 3132 | $245.4B | 13 | |
| 2019-03-31 | 3139 | $237.3B | 18 | |
| 2018-12-31 | 3185 | $208.3B | 25 | |
| 2018-09-30 | 3155 | $242.8B | 14 | |
| 2018-06-30 | 3121 | $233.4B | 13 | |
| 2018-03-31 | 2988 | $233.4B | 13 | |
| 2017-12-31 | 2975 | $238.6B | 14 | |
| 2017-09-30 | 2971 | $230.3B | 12 | |
| 2017-06-30 | 2897 | $225.4B | 13 | |
| 2017-03-31 | 2899 | $213.6B | 15 | |
| 2016-12-31 | 2768 | $204.5B | 14 | |
| 2016-09-30 | 2741 | $205.3B | 15 | |
| 2016-06-30 | 2714 | $198.5B | 14 | |
| 2016-03-31 | 2780 | $192.5B | 16 | |
| 2015-12-31 | 2766 | $187.3B | 18 | |
| 2015-09-30 | 2832 | $179.0B | 17 | |
| 2015-06-30 | 2838 | $196.6B | 14 | |
| 2015-03-31 | 2743 | $197.6B | 17 | |
| 2014-12-31 | 2574 | $196.6B | 16 | |
| 2014-09-30 | 2559 | $189.1B | 12 | |
| 2014-06-30 | 2498 | $191.3B | 13 | |
| 2014-03-31 | 2436 | $182.9B | 13 | |
| 2013-12-31 | 2345 | $178.3B | 17 | |
| 2013-09-30 | 2310 | $161.5B | 15 | |
| 2013-06-30 | 2213 | $148.0B | 0 |
Massachusetts Financial Services Co /ma/'s most significant position changes for 2026-03-31: Sold out: Qiagen N.V. (QGEN); New buy: Aptiv PLC; Sold out: Comcast CORP New; Trim: Totalenergies Se (TTE) — shares -99.05%; Trim: Microsoft CORP (MSFT) — shares -5.90%.
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | HON | Honeywell International INC | +0.4% | +27.17% | Add |
| 2 | WAT | Waters CORP | +0.4% | +76.40% | Add |
| 3 | LIN | Linde plc | +0.3% | -7.00% | Trim |
| 4 | AAPL | Apple INC | +0.3% | +12.72% | Add |
| 5 | V | Visa Inc-class A Shares | +0.3% | -8.15% | Trim |
| 6 | XOM | Exxon Mobil CORP | +0.3% | -6.92% | Trim |
| 7 | SCHW | Schwab (charles) CORP | +0.3% | -5.50% | Trim |
| 8 | AVGO | Broadcom INC | +0.3% | +11.31% | Add |
| 9 | NEE | Nextera Energy INC | +0.2% | +103.10% | Add |
| 10 | MDT | Medtronic plc | +0.2% | +2.34% | Add |
| 11 | WTW | Willis Towers Watson Public Limited Company | +0.2% | -1.84% | Trim |
| 12 | COP | Conocophillips | +0.2% | -9.27% | Trim |
| 13 | AEM | Agnico Eagle Mines LTD | +0.2% | +1.66% | Add |
| 14 | TMO | Thermo Fisher Scientific INC | +0.2% | -2.41% | Trim |
| 15 | APD | Air Products & Chemicals INC | +0.2% | -30.09% | Trim |
| 16 | FNV | Franco-nevada CORP | +0.2% | -5.09% | Trim |
| 17 | STX | Seagate Technology Holdings plc | +0.2% | +26.27% | Add |
| 18 | BDX | Becton Dickinson And Co | +0.2% | -4.06% | Trim |
| 19 | GEV | GE Vernova INC | +0.2% | +0.77% | Add |
| 20 | GILD | Gilead Sciences INC | +0.1% | +48.74% | Add |
| 21 | AMAT | Applied Materials INC | +0.1% | +349.40% | Add |
| 22 | ACN | Accenture plc | -0.1% | -8.09% | Trim |
| 23 | BA | Boeing Co/the | -0.1% | -9.68% | Trim |
| 24 | WFC | Wells Fargo & Co | -0.1% | -12.05% | Trim |
| 25 | HUM | Humana INC | -0.1% | -0.32% | Trim |
| 26 | DDOG | Datadog INC - Class A | -0.1% | -66.85% | Trim |
| 27 | MA | Mastercard INC - A | -0.1% | -5.95% | Trim |
| 28 | PGR | Progressive CORP | -0.1% | -5.32% | Trim |
| 29 | A | Agilent Technologies INC | -0.1% | -10.77% | Trim |
| 30 | GWRE | Guidewire Software INC | -0.1% | -29.66% | Trim |
| 31 | VST | Vistra CORP | -0.1% | -39.48% | Trim |
| 32 | MRK | Merck & Co. INC. | -0.1% | -93.84% | Trim |
| 33 | NVDA | Nvidia CORP | -0.2% | -2.80% | Trim |
| 34 | JPM | Jpmorgan Chase & Co | -0.2% | -5.52% | Trim |
| 35 | UBS | UBS Group AG | -0.2% | -4.49% | Trim |
| 36 | RYAAY | Ryanair Holdings Plc-sp Adr | -0.2% | -10.43% | Trim |
| 37 | ARES | Ares Management CORP - A | -0.2% | -32.59% | Trim |
| 38 | META | Meta Platforms Inc-class A | -0.2% | -8.64% | Trim |
| 39 | AXP | American Express Co | -0.2% | -12.74% | Trim |
| 40 | NFLX | Netflix INC | -0.2% | -85.27% | Trim |
| 41 | EXC | Exelon CORP | -0.2% | -92.64% | Trim |
| 42 | GOOGL | Alphabet Inc-cl A | -0.2% | -7.05% | Trim |
| 43 | CDNS | Cadence Design Sys INC | -0.2% | -37.96% | Trim |
| 44 | APTV | Aptiv PLC | -0.2% | -91.13% | Trim |
| 45 | KKR | Kkr & Co INC | -0.3% | -23.07% | Trim |
| 46 | MSFT | Microsoft CORP | -0.6% | -5.90% | Trim |
| 47 | TTE | Totalenergies Se | -0.8% | -99.05% | Trim |
| 48 | QGEN | Qiagen N.V. | — | EXIT | Sold out |
| 49 | ✓ | Aptiv PLC | — | NEW | New buy |
| 50 | ✓ | Comcast CORP New | — | EXIT | Sold out |
| Period | Filed | Type | EDGAR |
|---|---|---|---|
| 2026-03-31 | 2026-05-14 | 13F-HR | View on EDGAR |
| 2025-12-31 | 2026-01-22 | 13F-HR | View on EDGAR |
| 2025-09-30 | 2025-10-29 | 13F-HR | View on EDGAR |
| 2025-06-30 | 2025-08-08 | 13F-HR | View on EDGAR |
| 2025-03-31 | 2025-05-02 | 13F-HR | View on EDGAR |
| 2024-12-31 | 2025-02-12 | 13F-HR | View on EDGAR |
| 2024-09-30 | 2024-11-12 | 13F-HR | View on EDGAR |
| 2024-06-30 | 2024-08-09 | 13F-HR | View on EDGAR |
| 2024-03-31 | 2024-05-14 | 13F-HR | View on EDGAR |
| 2023-12-31 | 2024-02-08 | 13F-HR | View on EDGAR |
| 2023-09-30 | 2023-11-08 | 13F-HR | View on EDGAR |
| 2023-06-30 | 2023-08-09 | 13F-HR | View on EDGAR |
| 2023-03-31 | 2023-05-10 | 13F-HR | View on EDGAR |
| 2022-12-31 | 2023-02-13 | 13F-HR | View on EDGAR |
| 2022-09-30 | 2022-11-09 | 13F-HR | View on EDGAR |
| 2022-06-30 | 2022-08-09 | 13F-HR | View on EDGAR |
| 2022-03-31 | 2022-05-11 | 13F-HR | View on EDGAR |
| 2021-12-31 | 2022-02-10 | 13F-HR | View on EDGAR |
| 2021-09-30 | 2021-11-10 | 13F-HR | View on EDGAR |
| 2021-06-30 | 2021-08-13 | 13F-HR | View on EDGAR |
| 2021-03-31 | 2021-05-13 | 13F-HR | View on EDGAR |
| 2020-12-31 | 2021-05-12 | Amendment | View on EDGAR |
| 2020-12-31 | 2021-02-12 | 13F-HR | View on EDGAR |
| 2020-09-30 | 2020-11-12 | 13F-HR | View on EDGAR |
| 2020-06-30 | 2020-11-20 | Amendment | View on EDGAR |
| 2020-06-30 | 2020-08-11 | 13F-HR | View on EDGAR |
| 2020-03-31 | 2020-11-20 | Amendment | View on EDGAR |
| 2020-03-31 | 2020-05-14 | 13F-HR | View on EDGAR |
| 2019-12-31 | 2020-11-25 | Amendment | View on EDGAR |
| 2019-12-31 | 2020-02-13 | 13F-HR | View on EDGAR |
| 2019-09-30 | 2020-11-20 | Amendment | View on EDGAR |
| 2019-09-30 | 2019-11-05 | 13F-HR | View on EDGAR |
| 2019-06-30 | 2019-08-14 | 13F-HR | View on EDGAR |
| 2019-03-31 | 2019-05-13 | 13F-HR | View on EDGAR |
| 2018-12-31 | 2019-02-08 | 13F-HR | View on EDGAR |
| 2018-09-30 | 2018-10-25 | 13F-HR | View on EDGAR |
| 2018-06-30 | 2018-07-30 | 13F-HR | View on EDGAR |
| 2018-03-31 | 2018-05-04 | 13F-HR | View on EDGAR |
| 2017-12-31 | 2018-02-14 | 13F-HR | View on EDGAR |
| 2017-09-30 | 2017-11-14 | 13F-HR | View on EDGAR |
| 2017-06-30 | 2017-08-14 | 13F-HR | View on EDGAR |
| 2017-03-31 | 2017-05-12 | 13F-HR | View on EDGAR |
| 2016-12-31 | 2017-05-09 | Amendment | View on EDGAR |
| 2016-12-31 | 2017-02-13 | 13F-HR | View on EDGAR |
| 2016-09-30 | 2017-05-09 | Amendment | View on EDGAR |
| 2016-09-30 | 2016-11-14 | 13F-HR | View on EDGAR |
| 2016-06-30 | 2017-05-09 | Amendment | View on EDGAR |
| 2016-06-30 | 2016-08-12 | 13F-HR | View on EDGAR |
| 2016-03-31 | 2017-05-09 | Amendment | View on EDGAR |
| 2016-03-31 | 2016-05-12 | 13F-HR | View on EDGAR |
| 2015-12-31 | 2016-02-12 | 13F-HR | View on EDGAR |
| 2015-09-30 | 2015-11-12 | 13F-HR | View on EDGAR |
| 2015-06-30 | 2015-08-13 | 13F-HR | View on EDGAR |
| 2015-03-31 | 2015-05-13 | 13F-HR | View on EDGAR |
| 2014-12-31 | 2015-02-13 | 13F-HR | View on EDGAR |
| 2014-09-30 | 2014-11-13 | 13F-HR | View on EDGAR |
| 2014-06-30 | 2014-08-13 | 13F-HR | View on EDGAR |
| 2014-03-31 | 2014-05-13 | 13F-HR | View on EDGAR |
| 2013-12-31 | 2014-02-12 | 13F-HR | View on EDGAR |
| 2013-09-30 | 2013-11-08 | 13F-HR | View on EDGAR |
| 2013-06-30 | 2013-08-14 | 13F-HR | View on EDGAR |
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