PRIMECAP MANAGEMENT CO/CA/ IMCR — IMMUNOCORE HLDGS PLC

Ownership history in PRIMECAP MANAGEMENT CO/CA/  ·  9 quarters on record

AI Ownership Summary

PRIMECAP MANAGEMENT CO/CA/ reported IMMUNOCORE HLDGS PLC (IMCR) in 9 quarterly 13F filings from 2024 Q1 through 2026 Q1. Peak portfolio weight reached 0.1% in 2025 Q3. The latest visible filing shows IMCR at 0.09% 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.

What this IMCR ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was PRIMECAP MANAGEMENT CO/CA/'s position in IMMUNOCORE HLDGS PLC, 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

IMCR was reported at 0.09% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
0.1% in 2025 Q3

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 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.

IMCR stock page PRIMECAP MANAGEMENT CO/CA/ fund profile PRIMECAP MANAGEMENT CO/CA/ full holdings
How PRIMECAP MANAGEMENT CO/CA/ held IMCR — position size vs. price
% of Fund (quarterly)    IMCR price (quarter-end, indexed to 100)    SPY (indexed to 100)    QQQ (indexed to 100)
📋 Quarterly Holdings History 9 quarters  ▾
Quarter Action Sold % After 3M Timing Shares Change Chg % % of Fund Mkt Value Filed Price (Filed)
2026 Q1 REDUCED — — — 3,693,241 -268,639 -6.8% 0.09% $111.4M 2026-05-11 $28.85
2025 Q4 ADDED — — — 3,961,880 +207,320 +5.5% 0.10% $137.5M 2026-02-11 $32.93
2025 Q3 REDUCED — — — 3,754,560 -16,914 -0.4% 0.10% $136.4M 2025-11-12 $35.29
2025 Q2 ADDED — — — 3,771,474 +1,092,824 +40.8% 0.09% $118.3M 2025-08-11 $31.89
2025 Q1 ADDED — — — 2,678,650 +10,100 +0.4% 0.07% $79.5M 2025-05-09 $28.40
2024 Q4 ADDED — — — 2,668,550 +196,530 +8.0% 0.06% $78.7M 2025-02-10 $29.44
2024 Q3 ADDED — — — 2,472,020 +520,950 +26.7% 0.06% $77.0M 2024-11-08 $34.69
2024 Q2 ADDED — — — 1,951,070 +1,901,570 +3841.6% 0.05% $66.1M 2024-08-09 $37.20
2024 Q1 INITIATED — — — 49,500 — — 0.00% $3.2M 2024-05-14 $55.85

🏢 Other funds also holding IMCR

As of 2026 Q1 — sorted by position size

Persistent Asset Partners Ltd 0.55% HUSSMAN STRATEGIC ADVISORS, INC. 3Y 7Y 0.41% PSP Research LLC 0.32% Rhenman & Partners Asset Management AB 3Y 7Y 0.32% Virtus Investment Advisers, LLC 3Y 7Y 0.19% Fiera Capital Corp 3Y 7Y 0.11% Alta Wealth Advisors LLC 3Y 0.08% Hudson Bay Capital Management LP 3Y 7Y 0.07% Hennion & Walsh Asset Management, Inc. 3Y 0.05% Candriam S.C.A. 3Y 7Y 0.04%

FAQ About PRIMECAP MANAGEMENT CO/CA/ and IMCR

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

How long has PRIMECAP MANAGEMENT CO/CA/ reported owning IMCR?

PRIMECAP MANAGEMENT CO/CA/ reported IMCR across 9 quarterly 13F filings, from 2024 Q1 through 2026 Q1.

What was the largest reported IMCR position in PRIMECAP MANAGEMENT CO/CA/'s portfolio?

The largest reported portfolio weight for IMCR was 0.10% in 2025 Q3.

What is the latest reported IMCR position on this page?

The most recent filing on this page is 2026 Q1, when PRIMECAP MANAGEMENT CO/CA/ reported 3,693,241 shares, equal to 0.09% of portfolio, with an estimated market value of $111.4M.

What does the chart on this IMCR ownership page compare?

The chart compares PRIMECAP MANAGEMENT CO/CA/'s quarterly IMCR 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 PRIMECAP MANAGEMENT CO/CA/ time their IMCR position?

Based on 13F filing dates vs. subsequent IMCR price moves, PRIMECAP MANAGEMENT CO/CA/ correctly timed 3 out of 8 reported position changes (38%). The annualised alpha on IMCR relative to SPY over the holding period was -40.4%.

← Back to PRIMECAP MANAGEMENT CO/CA/ Holdings