DIMENSIONAL FUND ADVISORS LP ACIU — AC IMMUNE SA

Ownership history in DIMENSIONAL FUND ADVISORS LP  ·  23 quarters on record

AI Ownership Summary

DIMENSIONAL FUND ADVISORS LP reported AC IMMUNE SA (ACIU) in 23 quarterly 13F filings from 2023 Q4 through 2026 Q1. The latest visible filing shows ACIU at 0.00% 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 ACIU ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was DIMENSIONAL FUND ADVISORS LP's position in AC IMMUNE SA, 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 Q1

ACIU was reported at 0.00% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
0.0% 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
2023 Q4 to 2026 Q1

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.

ACIU stock page DIMENSIONAL FUND ADVISORS LP fund profile DIMENSIONAL FUND ADVISORS LP full holdings
How DIMENSIONAL FUND ADVISORS LP held ACIU — position size vs. price
% of Fund (quarterly)    ACIU 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 Q1 ADDED — — — 390,165 +176,701 +82.8% 0.00% $1.1M 2026-05-07 $2.92
2025 Q4 ADDED — — — 213,464 +36,353 +20.5% 0.00% $670K 2026-02-12 $2.93
2025 Q3 REDUCED 10.9% +12.5% ❌ 177,111 -21,575 -10.9% 0.00% $513K 2025-11-12 $3.28
2025 Q2 REDUCED 16.4% +49.8% ❌ 198,686 -38,872 -16.4% 0.00% $403K 2025-08-12 $2.15
2025 Q1 ADDED — — — 237,558 +106,148 +80.8% 0.00% $445K 2025-05-13 $1.57
2024 Q4 ADDED — — — 131,410 +74,358 +130.3% 0.00% $355K 2025-02-13 $2.68
2024 Q3 REDUCED 5.2% -29.4% ✅ 57,052 -3,146 -5.2% 0.00% $216K 2024-11-07 $3.27
2024 Q2 ADDED — — — 60,198 +446 +0.7% 0.00% $240K 2024-08-09 $3.28
2024 Q1 UNCHANGED — — — 59,752 — 0% 0.00% $177K 2024-05-10 $2.31
2023 Q4 UNCHANGED — — — 59,752 — 0% 0.00% $299K 2024-02-07 $2.66
13 older quarters hidden  —  Sign in free or upgrade to Premium to see full history

🏢 Other funds also holding ACIU

As of 2026 Q1 — sorted by position size

Silverberg Bernstein Capital Management LLC 0.02% China Universal Asset Management Co., Ltd. 3Y 0.0% Forum Finance Group S.A. 0.0% GSA CAPITAL PARTNERS LLP 3Y 7Y 0.0% Banque Cantonale Vaudoise 3Y 0.0% WELLS FARGO & COMPANY/MN 3Y 7Y 0.0% Activest Wealth Management 3Y 0.0% Strengthening Families & Communities, LLC 3Y 0.0% GF FUND MANAGEMENT CO. LTD. 0.0% UBS Group AG 3Y 7Y 0.0%

FAQ About DIMENSIONAL FUND ADVISORS LP and ACIU

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

How long has DIMENSIONAL FUND ADVISORS LP reported owning ACIU?

DIMENSIONAL FUND ADVISORS LP reported ACIU across 10 quarterly 13F filings, from 2023 Q4 through 2026 Q1.

What was the largest reported ACIU position in DIMENSIONAL FUND ADVISORS LP's portfolio?

The largest reported portfolio weight for ACIU was 0.00% in 2026 Q1.

What is the latest reported ACIU position on this page?

The most recent filing on this page is 2026 Q1, when DIMENSIONAL FUND ADVISORS LP reported 390,165 shares, equal to 0.00% of portfolio, with an estimated market value of $1.1M.

What does the chart on this ACIU ownership page compare?

The chart compares DIMENSIONAL FUND ADVISORS LP's quarterly ACIU 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 DIMENSIONAL FUND ADVISORS LP time their ACIU position?

Based on 13F filing dates vs. subsequent ACIU price moves, DIMENSIONAL FUND ADVISORS LP correctly timed 5 out of 12 reported position changes (42%). The annualised alpha on ACIU relative to SPY over the holding period was -24.9%.

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