DOSSIER · 13F-HR · Q3 2026

MASSACHUSETTS FINANCIAL SERVICES CO /MA/

$296.4B in tracked AUM across 4,265 positions as of Q3 2026.

MF
CIK 0000912938 · last filed Sep 30, 2026
Total AUM
$296.4B
as of Q3 2026
Holdings
4,265
—
positions
Whale Score
68
68
tracked
Activity
—
no data
changes this Q
AI Analysis · Q3 2026

Massachusetts Financial Services (MFS) reported $297.5B in Q1 2026, down from $310.1B, with reductions far outnumbering additions — 36 positions decreased versus just 6 increased. Microsoft (-$2.4B), Nvidia (-$959M), and Alphabet (-$929M) led the trims among anchors Nvidia (3.89%), Microsoft (3.59%), and Apple (2.64%). Against the broad pruning, MFS added to Broadcom (+$628M), Apple (+$536M), and gold miner Agnico Eagle (+$519M). New positions opened in RTX, Honeywell, Visa, Schwab, Waters, and Dominion Energy; KKR and American Express were sold.

Massachusetts Financial Services' Q1 2026 filing covers $297.5B across 3,996 positions, down from $310.1B. The change profile is telling: 36 positions were decreased against only 6 increased, marking one of the more uniformly defensive quarters among the large active managers. Nvidia (3.89%), Microsoft (3.59%), and Apple (2.64%) remain the largest weights.

Position changes
Analysis generated by 13F Insight from SEC Form 13F filing data · Q3 2026. Methodology

Quarter at a glance — Q3 2026

Position-change comparison pending.

No quarter-over-quarter changes available.

Top 10 holdings

By portfolio weight as of Q3 2026. Source: SEC EDGAR 13F-HR filings.

#HoldingValueSharesWeight
01
NVDA
NVIDIA CORPORATION
$15.1B60.2M5.1%
02
MSFT
MICROSOFT CORP
$12.3B21.2M4.1%
03
GOOGL
ALPHABET INC
$10.0B28.4M3.4%
04
AMZN
AMAZON COM INC
$8.8B30.3M3.0%
05
AAPL
APPLE INC
$8.7B25.6M2.9%
06
AVGO
BROADCOM INC
$5.0B11.5M1.7%
07
TSM
TAIWAN SEMICONDUCTOR MANUFAC
$4.4B9.4M1.5%
08
JPM
JPMORGAN CHASE & CO
$3.6B10.7M1.2%
09
MA
MASTERCARD INCORPORATED
$2.9B5.1M1.0%
10
TMO
THERMO FISHER SCIENTIFIC INC
$2.9B2.8M1.0%

Filing history

2026Q3Sep 30
$296.4B▼ 6.0%
4,265 positionsView →
2026Q2Jun 30
$315.2B▲ 5.9%
4,175 positionsView →
2026Q1Mar 31
$297.5B▼ 4.1%
3,996 positionsView →
2025Q4Dec 31
$310.1B▼ 3.9%
3,918 positionsView →
2025Q3Sep 30
$322.8B▲ 2.4%
3,802 positionsLocked
2025Q2Jun 30
$315.1B▲ 4.7%
3,634 positionsLocked
2025Q1Mar 31
$300.8B▼ 5.1%
3,631 positionsLocked
2024Q4Dec 31
$316.9B▼ 5.4%
3,379 positionsLocked
2024Q3Sep 30
$334.8B▲ 2.9%
3,250 positionsLocked
2024Q2Jun 30
$325.3B▼ 2.8%
3,274 positionsLocked
2024Q1Mar 31
$334.7B▲ 8.1%
3,242 positionsLocked
2023Q4Dec 31
$309.6B▲ 8.4%
3,283 positionsLocked
Showing 12 of 55