FXAIX vs PRGFX: 46% overlap
Fidelity 500 Index and T. Rowe Price Growth Stock share 45.7% of their portfolios by weight — computed as Σ min(wA, wB) over every holding both funds own.
Different holding dates. These holdings were published 31 days apart — FXAIX as of 2026-02-28, the rest through 2026-03-31. Each fund is compared using its most recent file, so any trading in between shows up as a difference.
You would hold two tickers and get the diversification of 1.5. Two funds that shared nothing would score 2.0; two identical funds score 1.0.
Top shared holdings
FXAIX and PRGFX hold 49 of the same securities. The ten contributing most to the overlap figure:
| Holding | in FXAIX | in PRGFX | Δ |
|---|---|---|---|
| NVDA | 7.3% | 13.8% | 6.5% |
| AAPL | 6.6% | 11.1% | 4.4% |
| MSFT | 5.0% | 9.1% | 4.1% |
| AMZN | 3.5% | 4.9% | 1.4% |
| GOOGL | 3.1% | 7.0% | 3.9% |
| AVGO | 2.6% | 5.1% | 2.6% |
| META | 2.4% | 3.9% | 1.5% |
| TSLA | 1.9% | 2.7% | 0.8% |
| LLY | 1.4% | 3.0% | 1.5% |
| V | 0.9% | 2.3% | 1.4% |
Where FXAIX and PRGFX differ
Sector weights as a share of each fund, ordered by the size of the gap rather than the size of the sector — two funds that overlap heavily still usually diverge somewhere.
| Sector | FXAIX | PRGFX | Δ |
|---|---|---|---|
| Information Technology | 31.8% | 48.2% | −16.4pp |
| Financials | 12.0% | 5.1% | +6.9pp |
| Consumer Staples | 5.4% | 0.8% | +4.5pp |
| Cash & Other | 0.0% | 3.5% | −3.5pp |
| Energy | 3.4% | 0.0% | +3.4pp |
| Health Care | 9.6% | 6.5% | +3.1pp |
| Industrials | 8.3% | 5.6% | +2.8pp |
| Communication Services | 10.5% | 13.1% | −2.6pp |
Δ is FXAIX minus PRGFX, in percentage points. Sector data is not published by every issuer, so “Unclassified” is a real category rather than a gap in the table.
What each fund holds alone
54.1% of FXAIX by weight, held in no part of PRGFX.
7.7% of PRGFX by weight, held in no part of FXAIX.
A large count with a small weight is the usual shape: the positions one fund adds are typically its smallest ones.
Concentration and cost
| FXAIX | PRGFX | |
|---|---|---|
| Top 10 holdings | 36.4% | 62.8% |
| Positions held | 506 | 79 |
| Cost per $10,000 held, per year | $1 | $64 |
Cost is the expense ratio applied to $10,000; it excludes any brokerage commission, bid-ask spread or tax consequence. Figures are facts about the funds, not a suggestion about which to hold.
Frequently asked
How much do FXAIX and PRGFX overlap?
FXAIX and PRGFX overlap 45.7% by portfolio weight — moderate overlap. They share 49 holdings. The figure comes from current issuer holdings files (FXAIX as of 2026-02-28, PRGFX as of 2026-03-31).
How is the overlap between FXAIX and PRGFX calculated?
As the sum of the smaller weight in each fund, over every holding both funds own: Σ min(wA, wB). If FXAIX holds a stock at 6% and PRGFX holds the same stock at 4%, 4% counts as shared. The result is bounded between 0% and 100%, and it is computed after looking through any fund-of-funds to the underlying holdings.
Is it redundant to hold both FXAIX and PRGFX?
That depends on your goals — we state facts, not advice. At 45.7% overlap, each fund still contributes meaningfully distinct exposure.
What does FXAIX own that PRGFX doesn't?
FXAIX holds 506 positions and PRGFX holds 79; 456 of FXAIX's positions don't appear in PRGFX at all, and they are 54.1% of FXAIX by weight.
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Related comparisons
Sources: issuer holdings files, FXAIX as of 2026-02-28, PRGFX as of 2026-03-31. Weights are fractions of each fund. Diagnostics, not advice.