ETF and Mutual Fund Analysis

Holdings as of March 31, 2026 (VIIIX) and August 12, 2026 (XLK)

ETF and Mutual Fund Analysis

Overlap, Comparison, and Diversification for Your Portfolio

Home > Compare > VIIIX vs XLK Holdings as of March 31, 2026 (VIIIX) and August 12, 2026 (XLK)

VIIIX vs XLK: Portfolio Overlap

Vanguard Institutional Index Fund vs State Street(R) Technology Select Sector SPDR(R) ETF

32.8%
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.

VIIIX
503 equity holdings
as of March 31, 2026
XLK
75 equity holdings
as of August 12, 2026
71 stocks held in common
Overlap View Venn Diagram
32.8% OVERLAP VIIIX XLK
Overlapping Holdings
10 Top 10 of 71 shared, by overlap contribution
# Stock VIIIX XLK Overlap%
1
NVDA
 7.60% 14.39% 7.60%
2
AAPL
 6.68% 11.77% 6.68%
3
MSFT
 4.93% 9.70% 4.93%
4
AVGO
 2.63% 5.22% 2.63%
5
MU
 0.68% 3.75% 0.68%
6
PLTR
 0.60% 2.54% 0.60%
7
AMD
 0.59% 3.98% 0.59%
8
CSCO
 0.55% 3.17% 0.55%
9
AMAT
 0.49% 2.82% 0.49%
10
LRCX
 0.48% 2.64% 0.48%
Most Divergent Holdings Stocks held by one fund but absent from the other
Only in VIIIX — VANGUARD INSTITUTIONAL INDEX FUND
StockWeight
AMZN3.65%
GOOGL3.00%
GOOG2.40%
META2.24%
TSLA1.87%
Only in XLK — State Street(R) Technology Select Sector SPDR(R) ETF
StockWeight
MRVL1.23%
FLEX0.30%
SSI US GOV MONEY MARKET CLASS0.05%
US DOLLAR0.02%

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

VIIIX (Vanguard Institutional Index Fund) and XLK (State Street(R) Technology Select Sector SPDR(R) ETF) share 32.8% portfolio overlap as of VIIIX's March 31, 2026 filing and XLK's August 12, 2026 filing, across 71 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 VIIIX and XLK 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 VIIIX and XLK?

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

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