Quantum Portfolio Management LLC GPK — GRAPHIC PACKAGING HLDG CO

Ownership history in Quantum Portfolio Management LLC  ·  6 quarters on record

AI Ownership Summary

Quantum Portfolio Management LLC reported GRAPHIC PACKAGING HLDG CO (GPK) in 6 quarterly 13F filings from 2023 Q4 through 2026 Q1. Peak portfolio weight reached 0.19% in 2023 Q4. The latest visible filing shows GPK at 0.08% 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 GPK ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was Quantum Portfolio Management LLC's position in GRAPHIC PACKAGING HLDG CO, 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

GPK was reported at 0.08% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
0.19% in 2023 Q4

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.

GPK stock page Quantum Portfolio Management LLC fund profile Quantum Portfolio Management LLC full holdings
How Quantum Portfolio Management LLC held GPK — position size vs. price
% of Fund (quarterly)    GPK 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)
2026 Q1 ADDED — — — 17,890 +1,010 +6.0% 0.08% $178K 2026-04-29 $9.60
2025 Q4 ADDED — — — 16,880 +1,269 +8.1% 0.11% $254K 2026-02-12 $12.07
2025 Q3 ADDED — — — 15,611 +800 +5.4% 0.09% $306K 2025-10-29 $15.98
2025 Q2 ADDED — — — 14,811 +4,735 +47.0% 0.15% $312K 2025-08-13 $22.58
2025 Q1 REDUCED 17.6% -18.4% ✅ 10,076 -2,159 -17.6% 0.13% $262K 2025-05-14 $22.45
2023 Q4 INITIATED — — — 12,235 — — 0.19% $302K 2024-01-26 $24.76

🏢 Other funds also holding GPK

As of 2026 Q1 — sorted by position size

MANNING & NAPIER ADVISORS LLC 3Y 7Y 1.19% Pullen Investment Management, LLC 0.87% Skylands Capital, LLC 3Y 7Y 0.44% Larry Mathis Financial Planning, LLC 0.3% Carnegie Lake Advisors LLC 0.29% Bayforest Capital Ltd 0.14% Y-Intercept (Hong Kong) Ltd 3Y 0.1% HARBOR CAPITAL ADVISORS, INC. 3Y 0.08% CONNABLE OFFICE INC 3Y 7Y 0.03% Nemes Rush Group LLC 0.03%

FAQ About Quantum Portfolio Management LLC and GPK

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

How long has Quantum Portfolio Management LLC reported owning GPK?

Quantum Portfolio Management LLC reported GPK across 6 quarterly 13F filings, from 2023 Q4 through 2026 Q1.

What was the largest reported GPK position in Quantum Portfolio Management LLC's portfolio?

The largest reported portfolio weight for GPK was 0.19% in 2023 Q4.

What is the latest reported GPK position on this page?

The most recent filing on this page is 2026 Q1, when Quantum Portfolio Management LLC reported 17,890 shares, equal to 0.08% of portfolio, with an estimated market value of $178K.

What does the chart on this GPK ownership page compare?

The chart compares Quantum Portfolio Management LLC's quarterly GPK 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 Quantum Portfolio Management LLC time their GPK position?

Based on 13F filing dates vs. subsequent GPK price moves, Quantum Portfolio Management LLC correctly timed 0 out of 5 reported position changes (0%). The annualised alpha on GPK relative to SPY over the holding period was -66.7%.

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