Institutional Portfolio Overlap & Shared Holdings

Compare institutional investor portfolios using publicly disclosed SEC Form 13F filings tracked by InsiderSet. Analyze shared holdings, overlapping sector exposure, consensus smart money positions, portfolio concentration, and estimated current values across major hedge funds and institutional asset managers.

Sector portfolio overlap

Explore shared holdings and top overlapping superinvestor pairs within a sector.

Investor AInvestor B

Berkshire Hathaway & Pershing Square Capital Management Portfolio Overlap

Shared 13F holdings between Berkshire Hathaway and Pershing Square Capital Management based on latest reported SEC filings (the quarter ended March 31, 2026).

Overlap Score

Minimal overlap

Shared Holdings

2 shared positions across both portfolios (27 holdings for Berkshire Hathaway, 11 for Pershing Square Capital Management).

Stock	Berkshire Hathaway value	Pershing Square Capital Management value	Combined value	Conviction	Est. current value	Sector
GOOGL Alphabet Inc.	$15.60B	$9.31M	$15.61B	3.0%	$21.54B	Communication Services
GOOG Alphabet Inc.	$1.03B	$89.42M	$1.12B	0.5%	$1.53B	Communication Services

Largest Shared Position

Alphabet Inc. (GOOGL) represents the largest overlapping position between Berkshire Hathaway and Pershing Square Capital Management based on the latest reported SEC Form 13F filings for the quarter ended March 31, 2026. The combined disclosed value of GOOGL positions reported by both investment firms is approximately $15.61B, reflecting overlapping institutional exposure to Alphabet Inc..

Shared Sector Exposure

Sector	Combined value	Shared holdings
Communication Services	$16.73B	GOOG, GOOGL

Consensus Smart Money Signals

Shared holdings between Berkshire Hathaway and Pershing Square Capital Management may indicate overlapping long-term investment themes or broader smart money consensus toward specific companies and sectors. SEC Form 13F filings report positions, not investment intent.

Strongest overlap by reported value: GOOGL ($15.61B combined).
Highest average portfolio weight in overlap: GOOGL (3.0% conviction score).
Largest estimated mark-to-market gain since filing: GOOGL ($5.93B vs reported combined value, where EOD data is available).

Historical Overlap Trend

The overlap between Berkshire Hathaway and Pershing Square Capital Management was unchanged between Q4 2001 and Q1 2001, with 2 shared holdings in the latest period ($16.73B combined reported value) versus 2 in the prior period ($8.54B).

Overlap Score Guide

Score	Meaning
85–100	Extremely high shared conviction
65–84	Strong overlap
45–64	Moderate overlap
25–44	Limited overlap
0–24	Minimal overlap