MARTINGALE ASSET MANAGEMENT L P AEE — Ameren Corporation COM

Ownership history in MARTINGALE ASSET MANAGEMENT L P  ·  71 quarters on record

AI Ownership Summary

MARTINGALE ASSET MANAGEMENT L P reported Ameren Corporation COM (AEE) in 71 quarterly 13F filings from 2024 Q1 through 2026 Q2. Peak portfolio weight reached 0.56% in 2026 Q1. The latest visible filing shows AEE at 0.54% of the fund.

This page tracks quarterly shares, estimated market value, portfolio weight, filing dates, and disclosure-aligned stock prices directly from SEC EDGAR 13F filings. Older history is available after unlock; the visible window still shows the most recent pattern.

What this AEE ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was MARTINGALE ASSET MANAGEMENT L P's position in Ameren Corporation COM, and how did that conviction change over time? You can read the holding window, peak weight, latest reported size, disclosure timing, and quarter-by-quarter changes without piecing the story together from raw SEC rows.

Freshest filing
Latest Reported Filing
2026 Q2

AEE was reported at 0.54% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
0.56% in 2026 Q1

Peak weight helps separate a token disclosure from a real conviction holding the fund genuinely cared about.

Time in book
Holding Window
2024 Q1 to 2026 Q2

Longer holding windows often tell a very different story from short-lived tactical trades or one-quarter experiments.

Decision context
Why It Matters
Position size beats headlines

Knowing that a fund owned a stock is useful. Knowing whether it was a 0.20% placeholder or a true high-conviction position is where the signal actually starts.

AEE stock page MARTINGALE ASSET MANAGEMENT L P fund profile MARTINGALE ASSET MANAGEMENT L P full holdings
How MARTINGALE ASSET MANAGEMENT L P held AEE — position size vs. price
% of Fund (quarterly)    AEE price (quarter-end, indexed to 100)    SPY (indexed to 100)    QQQ (indexed to 100)
📋 Quarterly Holdings History 10 quarters  ▾
Quarter Action Sold % After 3M Timing Shares Change Chg % % of Fund Mkt Value Filed Price (Filed)
2026 Q2 REDUCED — — — 201,750 -151 -0.1% 0.54% $22.8M 2026-08-13 $109.12
2026 Q1 ADDED — — — 201,901 +51,562 +34.3% 0.56% $22.2M 2026-05-13 $108.33
2025 Q4 ADDED — — — 150,339 +1,875 +1.3% 0.38% $15.0M 2026-02-13 $109.45
2025 Q3 ADDED — — — 148,464 +115,526 +350.7% 0.39% $15.5M 2025-11-13 $102.60
2025 Q2 ADDED — — — 32,938 +4,180 +14.5% 0.08% $3.2M 2025-08-11 $98.55
2025 Q1 ADDED — — — 28,758 +21,322 +286.7% 0.07% $2.9M 2025-05-14 $91.69
2024 Q4 ADDED — — — 7,436 +300 +4.2% 0.02% $663K 2025-02-13 $94.16
2024 Q3 REDUCED 14.4% +3.2% ❌ 7,136 -1,200 -14.4% 0.01% $624K 2024-11-14 $85.34
2024 Q2 UNCHANGED — — — 8,336 — 0% 0.01% $593K 2024-08-12 $75.79
2024 Q1 REDUCED 95.0% -3.4% ✅ 8,336 -159,603 -95.0% 0.01% $617K 2024-05-14 $70.00
61 older quarters hidden  —  Sign in free or upgrade to Premium to see full history

🏢 Other funds also holding AEE

As of 2026 Q2 — sorted by position size

Longboard Asset Management, LP 4.07% Covalis Capital LLP 3Y 7Y 4.02% Harrison Street Private Wealth LLC 3.44% ANTIPODES PARTNERS Ltd 3Y 7Y 2.66% HITE Hedge Asset Management LLC 3Y 7Y 2.58% Aventail Capital Group, LP 3Y 2.53% Bank & Trust Co 2.07% HOMESTEAD ADVISERS CORP 3Y 7Y 1.8% LEGACY FINANCIAL INDEPENDENT ADVISORS LLC 1.78% REAVES W H & CO INC 3Y 7Y 1.45%

FAQ About MARTINGALE ASSET MANAGEMENT L P and AEE

These are the practical questions this page is built to answer before you even open the full history table.

How long has MARTINGALE ASSET MANAGEMENT L P reported owning AEE?

MARTINGALE ASSET MANAGEMENT L P reported AEE across 10 quarterly 13F filings, from 2024 Q1 through 2026 Q2.

What was the largest reported AEE position in MARTINGALE ASSET MANAGEMENT L P's portfolio?

The largest reported portfolio weight for AEE was 0.56% in 2026 Q1.

What is the latest reported AEE position on this page?

The most recent filing on this page is 2026 Q2, when MARTINGALE ASSET MANAGEMENT L P reported 201,750 shares, equal to 0.54% of portfolio, with an estimated market value of $22.8M.

What does the chart on this AEE ownership page compare?

The chart compares MARTINGALE ASSET MANAGEMENT L P's quarterly AEE portfolio weight with the stock's indexed share price, so you can see whether the fund was building, trimming, or holding the position as price moved.

How well did MARTINGALE ASSET MANAGEMENT L P time their AEE position?

Based on 13F filing dates vs. subsequent AEE price moves, MARTINGALE ASSET MANAGEMENT L P correctly timed 35 out of 66 reported position changes (53%). The annualised alpha on AEE relative to SPY over the holding period was +9.0%.

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