ETF and Mutual Fund Analysis

Holdings as of May 31, 2026 (AMCFX) and March 31, 2026 (VIIIX)

ETF and Mutual Fund Analysis

Overlap, Comparison, and Diversification for Your Portfolio

Home > Compare > AMCFX vs VIIIX Holdings as of May 31, 2026 (AMCFX) and March 31, 2026 (VIIIX)

AMCFX vs VIIIX: Portfolio Overlap

AMCAP Fund vs Vanguard Institutional Index Fund

41.4%
Weighted portfolio overlap
Moderate Overlap

Moderate Overlap. A recognisable amount of shared weight, common among funds drawing on the same large-cap pool. Much of it typically sits in the top conviction holdings.

AMCFX
113 equity holdings
as of May 31, 2026
VIIIX
503 equity holdings
as of March 31, 2026
73 stocks held in common
Overlap View Venn Diagram
41.4% OVERLAP AMCFX VIIIX
Overlapping Holdings
10 Top 10 of 73 shared, by overlap contribution
# Stock AMCFX VIIIX Overlap%
1
NVDA
 7.16% 7.60% 7.16%
2
MSFT
 5.73% 4.93% 4.93%
3
AMZN
 6.32% 3.65% 3.65%
4
GOOGL
 5.87% 3.00% 3.00%
5
AVGO
 7.72% 2.63% 2.63%
6
META
 3.91% 2.24% 2.24%
7
AAPL
 2.00% 6.68% 2.00%
8
GOOG
 1.64% 2.40% 1.64%
9
LLY
 4.67% 1.31% 1.31%
10
MA
 1.63% 0.73% 0.73%
Most Divergent Holdings Stocks held by one fund but absent from the other
Only in AMCFX — AMCAP Fund
StockWeight
Taiwan Semiconductor Manufacturing Co Ltd3.41%
MELI1.84%
VIKING HOLDINGS LTD1.81%
ALNY1.30%
Linde PLC1.26%
Only in VIIIX — VANGUARD INSTITUTIONAL INDEX FUND
StockWeight
BRK.B1.57%
XOM1.27%
JNJ1.06%
WMT0.98%
COST0.79%

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Frequently Asked Questions (FAQs)
What is the portfolio overlap between AMCFX and VIIIX?

AMCFX (AMCAP Fund) and VIIIX (Vanguard Institutional Index Fund) share 41.4% portfolio overlap as of AMCFX's May 31, 2026 filing and VIIIX's March 31, 2026 filing, across 73 common stocks. Overlap is the sum of the smaller weight of each shared stock, so it reads as the share of a dollar that lands on the same companies in both funds.

Do AMCFX and VIIIX invest in the same stocks?

Somewhat. The two funds share a meaningful set of stocks, though each also holds distinct positions the other does not.

What are the top stocks held by both AMCFX and VIIIX?

The most prominent shared holdings (by combined weight) are: NVDA, MSFT, AMZN. See the full common-holdings table on this page for weights in each fund.

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