ETF and Mutual Fund Analysis

Holdings as of March 31, 2026

ETF and Mutual Fund Analysis

Overlap, Comparison, and Diversification for Your Portfolio

Home > Compare > AIVSX vs VIIIX Holdings as of March 31, 2026

AIVSX vs VIIIX: Portfolio Overlap

Investment Co of America vs Vanguard Institutional Index Fund

49.3%
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.

AIVSX
171 equity holdings
as of March 31, 2026
VIIIX
503 equity holdings
as of March 31, 2026
118 stocks held in common
Overlap View Venn Diagram
49.3% OVERLAP AIVSX VIIIX
Overlapping Holdings
10 Top 10 of 118 shared, by overlap contribution
# Stock AIVSX VIIIX Overlap%
1
NVDA
 6.71% 7.60% 6.71%
2
MSFT
 5.81% 4.93% 4.93%
3
AMZN
 4.85% 3.65% 3.65%
4
AVGO
 6.31% 2.63% 2.63%
5
GOOGL
 2.57% 3.00% 2.57%
6
AAPL
 2.29% 6.68% 2.29%
7
META
 2.68% 2.24% 2.24%
8
GOOG
 2.19% 2.40% 2.19%
9
LLY
 3.45% 1.31% 1.31%
10
JPM
 1.09% 1.34% 1.09%
Most Divergent Holdings Stocks held by one fund but absent from the other
Only in AIVSX — Investment Co of America
StockWeight
British American Tobacco PLC2.72%
Royal Caribbean Cruises Ltd.1.98%
Linde PLC1.72%
Taiwan Semiconductor Manufacturing Co Ltd1.62%
Canadian Natural Resources Ltd0.98%
Only in VIIIX — VANGUARD INSTITUTIONAL INDEX FUND
StockWeight
WMT0.98%
COST0.79%
CVX0.70%
PLTR0.60%
AMD0.59%

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

AIVSX (Investment Co of America) and VIIIX (Vanguard Institutional Index Fund) share 49.3% portfolio overlap as of their March 31, 2026 filings, across 118 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 AIVSX 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 AIVSX 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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