Institutional Manager · CIK 0000912938
MASSACHUSETTS FINANCIAL SERVICES CO /MA/
Boston, MA · File #028-04968
Latest AUM
$310.12B
Positions
3,918
Top-10 Concentration
44.1%
Filings
9
Portfolio Value Over Time
2024-03
2024-06
2024-09
2024-12
2025-03
2025-06
2025-09
2025-12
Biggest QoQ Changes
Ranked by conviction flow (share change × current price) so mark-to-market moves don't dominate. Price effect column shows how much of the $ change was just the stock moving.
| Action | Issuer | Ticker / CUSIP | Δ Shares | Flow ($) | Price Effect |
|---|---|---|---|---|---|
| REDUCE | MARSH & MCLENNAN COS INC | 571748102 | -7,437,726 | -$1.38B | -$119.5M |
| REDUCE | TEXAS INSTRS INC | 882508104 | -5,577,520 | -$967.6M | -$57.3M |
| REDUCE | PFIZER INC | PFE | -37,143,941 | -$924.9M | -$21.6M |
| REDUCE | JACOBS SOLUTIONS INC | J | -1,640,183 | -$217.3M | -$28.6M |
| ADD | S&P GLOBAL INC | SPGI | +236,857 | +$123.8M | +$24,793 |
| REDUCE | PROLOGIS INC. | PLDGP | -784,939 | -$100.2M | +$14.0M |
| REDUCE | EQUINIX INC | EQIX | -98,596 | -$75.5M | -$1.7M |
| REDUCE | RYANAIR HOLDINGS PLC | RYAOF | -976,141 | -$70.5M | +$11.8M |
| REDUCE | AXALTA COATING SYS LTD | AXTA | -2,171,417 | -$70.2M | +$8.4M |
| REDUCE | WARNER BROS DISCOVERY INC | WBD | -2,433,389 | -$70.1M | +$22.6M |
Sector Allocation
Filing History
- 13F HOLDINGS REPORTQ/E Dec 20253,918 pos · $310.12B
- 13F HOLDINGS REPORTQ/E Sep 20253,802 pos · $322.80B
- 13F HOLDINGS REPORTQ/E Jun 20253,634 pos · $315.08B
- 13F HOLDINGS REPORTQ/E Mar 20253,631 pos · $300.81B
- 13F HOLDINGS REPORTQ/E Dec 20243,379 pos · $316.87B
- 13F HOLDINGS REPORTQ/E Sep 20243,250 pos · $334.82B
- 13F HOLDINGS REPORTQ/E Jun 20243,274 pos · $325.32B
- 13F HOLDINGS REPORTQ/E Mar 20243,242 pos · $334.73B
- 13F HOLDINGS REPORTQ/E Dec 20233,323 pos · $285.59B
Top 20 Holdings — Dec 2025
| # | Issuer | Ticker | Shares | Value | % of Portfolio |
|---|---|---|---|---|---|
| 1 | NVIDIA CORPORATION | NVDA | 55,790,839 | $10.40B | 8.92% |
| 2 | MICROSOFT CORP | MSFT | 20,964,998 | $10.14B | 8.70% |
| 3 | ALPHABET INC | GOOG | 19,513,719 | $6.11B | 5.24% |
| 4 | APPLE INC | AAPL | 22,069,602 | $6.00B | 5.15% |
| 5 | AMAZON COM INC | AMZN | 21,222,061 | $4.90B | 4.20% |
| 6 | JPMORGAN CHASE & CO. | VYLD | 12,139,185 | $3.91B | 3.35% |
| 7 | MASTERCARD INCORPORATED | MA | 4,773,331 | $2.72B | 2.34% |
| 8 | META PLATFORMS INC | META | 3,905,998 | $2.58B | 2.21% |
| 9 | JOHNSON & JOHNSON | JNJ | 11,637,031 | $2.41B | 2.07% |
| 10 | THE CIGNA GROUP | 125523100 | 8,381,651 | $2.31B | 1.98% |
| 11 | PROGRESSIVE CORP | 743315103 | 10,118,807 | $2.30B | 1.98% |
| 12 | BROADCOM INC | AVGO | 6,516,316 | $2.26B | 1.93% |
| 13 | TAIWAN SEMICONDUCTOR MFG LTD | 874039100 | 7,196,622 | $2.19B | 1.88% |
| 14 | MCKESSON CORP | MCK | 2,639,373 | $2.17B | 1.86% |
| 15 | AON PLC | AON | 5,963,569 | $2.10B | 1.80% |
| 16 | NASDAQ INC | NDAQ | 21,654,265 | $2.10B | 1.80% |
| 17 | RTX CORPORATION | RTX | 11,260,124 | $2.07B | 1.77% |
| 18 | ACCENTURE PLC IRELAND | ACN | 7,260,916 | $1.95B | 1.67% |
| 19 | KKR & CO INC | KKRT | 14,836,747 | $1.89B | 1.62% |
| 20 | UBS GROUP AG | UBS | 39,429,082 | $1.83B | 1.57% |