Manager × security

MASSACHUSETTS FINANCIAL SERVICES CO /MA/ AON holdings history

Who else holds this security?

AON PLC-CLASS A · CUSIP G0403H108 · CIK 912938

This is the oldest quarter open without an account, so changes against the quarter before it are withheld. Sign in to see them.
Citable facts

As of 2026-06-30, MASSACHUSETTS FINANCIAL SERVICES CO /MA/ reported 7.62M AON (shares), valued at $2.58B, or 0.82% of its reported non-derivative portfolio. Filed 2026-08-03.

Verify history & sources
Portfolio weight and quantity history
Reported portfolio weight
0.82%
Shares
7.62M
7,615,397
Reported value
$2.58B
USD

Shares decreased 8.89%; reported value decreased 6.42%, and weight changed -0.11 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds.

Left: % · Right: Shares · Independently scaled axes

Exact data and methodology

Axes scale independently; a crossing does not mean equal values. Weight uses each quarter's total reported non-derivative value. Same CUSIP; missing quarters are gaps, not zero. Revised history may include later disclosures.

QuarterWeightQuantitySource
Q2 20260.82%7,615,397SEC filingFiled Aug 3, 2026
Q1 20260.93%8,358,097SEC filingFiled May 14, 2026
Q4 20250.97%8,545,036SEC filingFiled Jan 22, 2026
Q3 20250.97%8,757,686SEC filingFiled Oct 29, 2025
Q2 20251.01%8,952,011SEC filingFiled Aug 8, 2025
Q1 20251.30%9,832,327SEC filingFiled May 2, 2025
Q4 20241.32%11,616,324SEC filingFiled Feb 12, 2025
Q3 20241.26%12,164,459SEC filingFiled Nov 12, 2024
Q2 20241.13%12,552,569SEC filingFiled Aug 9, 2024
Q1 20241.22%12,242,867SEC filingFiled May 14, 2024
Q4 20231.17%12,472,342SEC filingFiled Feb 8, 2024
Q3 20231.55%13,611,164SEC filingFiled Nov 8, 2023

History & evidence by quarter

QuarterWeightQuantityValueChange explainedSource
Q3 20231.55%13,611,164$4.41BThe prior quarter is outside the free window. Sign in for the comparison.SEC filing
Filed Nov 8, 2023
Q4 20231.17%12,472,342$3.63BShares decreased 8.37%; reported value decreased 17.75%, and weight changed -0.38 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds.SEC filing
Filed Feb 8, 2024
Q1 20241.22%12,242,867$4.09BShares decreased 1.84%; reported value increased 12.56%, and weight changed +0.05 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds.SEC filing
Filed May 14, 2024
Q2 20241.13%12,552,569$3.69BShares increased 2.53%; reported value decreased 9.80%, and weight changed -0.09 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds.SEC filing
Filed Aug 9, 2024
Q3 20241.26%12,164,459$4.21BShares decreased 3.09%; reported value increased 14.21%, and weight changed +0.13 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds.SEC filing
Filed Nov 12, 2024
Q4 20241.32%11,616,324$4.17BShares decreased 4.51%; reported value decreased 0.87%, and weight changed +0.06 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds.SEC filing
Filed Feb 12, 2025
Q1 20251.30%9,832,327$3.92BShares decreased 15.36%; reported value decreased 5.95%, and weight changed -0.02 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds.SEC filing
Filed May 2, 2025
Q2 20251.01%8,952,011$3.19BShares decreased 8.95%; reported value decreased 18.61%, and weight changed -0.29 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds.SEC filing
Filed Aug 8, 2025
Q3 20250.97%8,757,686$3.12BShares decreased 2.17%; reported value decreased 2.22%, and weight changed -0.04 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds.SEC filing
Filed Oct 29, 2025
Q4 20250.97%8,545,036$3.02BShares decreased 2.43%; reported value decreased 3.44%, and weight changed +0.00 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds.SEC filing
Filed Jan 22, 2026
Q1 20260.93%8,358,097$2.75BShares decreased 2.19%; reported value decreased 8.73%, and weight changed -0.04 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds.SEC filing
Filed May 14, 2026
Q2 20260.82%7,615,397$2.58BShares decreased 8.89%; reported value decreased 6.42%, and weight changed -0.11 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds.SEC filing
Filed Aug 3, 2026
MASSACHUSETTS FINANCIAL SERVICES CO /MA/ · AON PLC-CLASS A

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Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.

13F reports quarter-end long positions in securities traded on US exchanges, filed by managers holding at least $100 million of such securities; it is not the manager's full portfolio, not assets under management, and value changes are not returns. Weights use the reported total value as denominator. Option rows show notional value, not premium or net exposure. Amendments are merged into the quarter when Akkru could match them.