MASSACHUSETTS FINANCIAL SERVICES CO /MA/
SEC Form 13F institutional filer · CIK 0000912938
13F-HR · 355 reported holdings · 2026-03-31
Asset management firm, subsidiary of Sun Life Financial.
Reported long-US-equity value
$236.15B
Top-10 concentration
25.8%
MASSACHUSETTS FINANCIAL SERVICES CO /MA/ — $236B AUM allocation strategy
MASSACHUSETTS FINANCIAL SERVICES CO /MA/ files SEC Form 13F and reports $236B of long US equity value across 355 reported holdings for 2026-03-31.
Its largest sector bet is Information Technology 15.3%, followed by Financials 5.3% and Health Care 4.9%.
The top 10 holdings account for 26% of reported value — a broadly spread portfolio. The sector and industry splits below are of the same reported value. Track quarter-over-quarter adds, trims, new positions and exits below — sourced from SEC 13F filings, public domain.
MASSACHUSETTS FINANCIAL SERVICES CO /MA/ — latest SEC 13F insights
Reported long-US-equity value (13F AUM)
$236B
total across 355 reported holdings · 2026-03-31 · excludes shorts, cash, non-US
Top-10 concentration
26% of value
higher = narrower conviction; lower = spread / hedging
Biggest adds (shares)
+$NEE +6.7M sh · +$706M+$AAPL +3.42M sh · +$536M+$VICI +2.79M sh · +$77.6M
Biggest trims (shares)
−$KVUE −18.7M sh · −$315M−$EXC −13.1M sh · −$566M−$AMCR −11.6M sh · −$8.94M
Exited to nil (held last quarter, gone now)
$NOW ($161M last qtr)$JCI ($142M last qtr)$HSY ($128M last qtr)$RL ($107M last qtr)$HAS ($29.1M last qtr)
Sector allocation (share of reported value)
each slice is a share of the reported long-US-equity value — smaller sectors and the rest of the book roll into “Other holdings”
Qtr shift = share-point change vs the prior quarter's filing — first period tracked for this filer; the column fills in with the next quarterly refresh.
Industry allocation (share of reported value)
- Semiconductors6.4%—
- Systems Software4.5%—
- Interactive Media & Services4.1%—
- Technology Hardware, Storage & Peripherals3.3%—
- Broadline Retail2.8%—
- Insurance Brokers2.3%—
- Diversified Banks1.8%—
- Pharmaceuticals1.4%—
- Other holdings73.5%—
the finer GICS cut of the same book — same denominator — smaller industries roll into “Other holdings”
Qtr shift = share-point change vs the prior quarter's filing — first period tracked for this filer; the column fills in with the next quarterly refresh.
Top S&P 500 holdings
10 of 10 rows · sorted by Value ↓
| Ticker | Holding | Shares | Value | Δ QoQ | Weight |
|---|---|---|---|---|---|
| $NVDA | NVIDIA Corporation | 65.3M | $11.6B | -1.88M | 4.9% |
| $MSFT | Microsoft Corporation | 25.5M | $10.7B | -1.6M | 4.5% |
| $AAPL | Apple Inc | 30.3M | $7.85B | +3.42M | 3.3% |
| $GOOG | Alphabet Inc. Class C Capital Stock | 23.4M | $6.95B | -1.78M | 2.9% |
| $AMZN | Amazon.com Inc | 26M | $6.57B | -2.43M | 2.8% |
| $JPM | JP Morgan Chase & Co | 14.7M | $4.33B | -857K | 1.8% |
| $AVGO | Broadcom Inc | 8.98M | $3.42B | +913K | 1.4% |
| $JNJ | Johnson & Johnson | 13.4M | $3.32B | -2.95M | 1.4% |
| $CI | The Cigna Group | 11.6M | $3.11B | -210K | 1.3% |
| $XOM | ExxonMobil Holdings Corporation | 17.9M | $3.05B | -1.33M | 1.3% |
…and 345 more holdings in the full 13F filing (top positions only shown).
SEC Form 13F data sets · public domain · 45-day filing lag · >$100M AUM managers · as reported
← All 13F filers·← QuantOrb.pro
How to read Δ QoQ — the five insight categories, and the caveats
The categories. Analysts, quants and retail traders look past total portfolio value to isolate actionable signals. Five categories matter.
Conviction & concentration shifts
New positions vs complete exits — a brand-new stock signals high conviction; a full liquidation suggests a broken thesis or tax-loss harvesting. Aggressive sizing — look at share count, not dollars: a 20% share increase during a drawdown is strong dip-buying. Concentration — a narrowing top-5/10 means conviction; spreading capital across more names means hedging.
Sector & macro allocation rotations
Aggregating Δ QoQ moves across sectors shows where smart money is leaning in or sneaking out — rotating out of growth into defensives or energy, for example. The fund's total long equity exposure quarter-over-quarter is a proxy for overall institutional risk appetite.
Crowding & smart-money consensus
When several managers initiate or expand the same stock in the same quarter, that is institutional consensus. Contrarian reads: top pickers buying hard into a beaten-down name the market is selling.
Derivative & option overlays
Reported call/put changes indicate whether managers are adding downside hedges or leveraging upside exposure. Note: a long increase may be half of a market-neutral pair trade.
Who reads this
| Retail "cloners" | High-conviction ideas to replicate ~45 days after quarter-end. |
| Corporate IR | Which funds bought or dumped the stock, before the next call. |
| Quant / algo traders | Cross-sectional factor inputs: flow, momentum, ownership. |
Four caveats before you trade on it
- 45-day lag — holdings are quarter-end; positions may already be closed.
- Long-only — 13Fs miss shorts, pair trades and cash.
- No non-US / fixed income — the picture is US equities plus options.
- Corporate actions — splits and spinoffs distort raw share deltas.
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