AIGEN INVESTMENT MANAGEMENT, LP ACM — AECOM

Ownership history in AIGEN INVESTMENT MANAGEMENT, LP  ·  10 quarters on record

AI Ownership Summary

AIGEN INVESTMENT MANAGEMENT, LP reported AECOM (ACM) in 10 quarterly 13F filings from 2024 Q1 through 2025 Q4. Peak portfolio weight reached 0.59% in 2025 Q4. The latest visible filing shows ACM at 0.59% 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 ACM ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was AIGEN INVESTMENT MANAGEMENT, LP's position in AECOM, 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
2025 Q4

ACM was reported at 0.59% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
0.59% in 2025 Q4

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 2025 Q4

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.

ACM stock page AIGEN INVESTMENT MANAGEMENT, LP fund profile AIGEN INVESTMENT MANAGEMENT, LP full holdings
How AIGEN INVESTMENT MANAGEMENT, LP held ACM — position size vs. price
% of Fund (quarterly)    ACM price (quarter-end, indexed to 100)    SPY (indexed to 100)    QQQ (indexed to 100)
📋 Quarterly Holdings History 6 quarters  ▾
Quarter Action Sold % After 3M Timing Shares Change Chg % % of Fund Mkt Value Filed Price (Filed)
2025 Q4 ADDED — — — 26,599 +19,750 +288.4% 0.59% $2.5M 2026-02-14 (Est.) $87.99
2025 Q2 ADDED — — — 6,849 +3,035 +79.6% 0.11% $773K 2025-08-12 $119.83
2025 Q1 REDUCED 57.1% +22.0% ❌ 3,814 -5,082 -57.1% 0.06% $354K 2025-05-12 $105.16
2024 Q4 REDUCED 11.9% -13.0% ✅ 8,896 -1,200 -11.9% 0.17% $950K 2025-02-06 $106.78
2024 Q2 ADDED — — — 10,096 +6,792 +205.6% 0.17% $890K 2024-08-09 $94.82
2024 Q1 REDUCED 80.8% -12.4% ✅ 3,304 -13,920 -80.8% 0.07% $324K 2024-05-14 $89.54
4 older quarters hidden  —  Sign in free or upgrade to Premium to see full history

🏢 Other funds also holding ACM

As of 2026 Q1 — sorted by position size

HENNESSY ADVISORS INC 3Y 7Y 0.88% CENTRAL BANK & TRUST CO 3Y 7Y 0.81% Ninety One North America, Inc. 3Y 7Y 0.52% J2 Capital Management Inc 3Y 0.36% Guinness Atkinson Asset Management Inc 3Y 7Y 0.35% Linden Thomas Advisory Services, LLC 3Y 0.34% LECAP ASSET MANAGEMENT LTD 0.31% Vest Financial, LLC 3Y 0.29% Oak Thistle LLC 3Y 0.26% ASAHI LIFE ASSET MANAGEMENT CO., LTD. 3Y 7Y 0.2%

FAQ About AIGEN INVESTMENT MANAGEMENT, LP and ACM

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

How long has AIGEN INVESTMENT MANAGEMENT, LP reported owning ACM?

AIGEN INVESTMENT MANAGEMENT, LP reported ACM across 6 quarterly 13F filings, from 2024 Q1 through 2025 Q4.

What was the largest reported ACM position in AIGEN INVESTMENT MANAGEMENT, LP's portfolio?

The largest reported portfolio weight for ACM was 0.59% in 2025 Q4.

What is the latest reported ACM position on this page?

The most recent filing on this page is 2025 Q4, when AIGEN INVESTMENT MANAGEMENT, LP reported 26,599 shares, equal to 0.59% of portfolio, with an estimated market value of $2.5M.

What does the chart on this ACM ownership page compare?

The chart compares AIGEN INVESTMENT MANAGEMENT, LP's quarterly ACM 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 AIGEN INVESTMENT MANAGEMENT, LP time their ACM position?

Based on 13F filing dates vs. subsequent ACM price moves, AIGEN INVESTMENT MANAGEMENT, LP correctly timed 4 out of 9 reported position changes (44%). The annualised alpha on ACM relative to SPY over the holding period was -10.5%.

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