Lubar & Co., Inc

In its 13F for Q4 2025 (holdings as of December 31, 2025, filed February 3, 2026), Lubar & Co., Inc reported 3 stock positions worth $134.2 million. Its top holding was Hallador Energy (HNRG) at 77.3% of the portfolio, followed by Star (SGU, 11.4%) and Berkshire Hathaway Class A (BRK.A, 11.2%).

Most Recent 13F
Q2 2026
Location
MILWAUKEE, WI
CIK
0001473033
Portfolio Value
$134.2M (Q4 2025)
SEC Filing
0001140361-26-003445 ↗ filed Feb 3, 2026

Holdings Value

0$50.0M$100.0M$150.0M Q4 2025: $134.2M $134.2M Q4 2025 Q1 2026: $119.0M Q1 2026 Q2 2026: $126.4M Q2 2026

Holdings 3 stocks · $134.2M
HNRG Hallador Energy Co. 77.33% 5,452,019 $103.8M —
SGU Star Group LP 11.43% 1,295,985 $15.3M —
BRK.A Berkshire Hathaway Inc. Class A 11.24% 20 $15.1M —

Portfolio Sells Q4 2025

No earlier filing to compare with.

Portfolio Buys Q4 2025

No earlier filing to compare with.

All Filings

QuarterPositions13F Reported ValueTop Holdings
Q2 2026 3$126.4MHNRG, SGU, BRK.A
Q1 2026 3$119.0MHNRG, SGU, BRK.A
Q4 2025 3$134.2MHNRG, SGU, BRK.A