AGTHX vs RGAGX: 99% overlap
American Funds Growth Fund of America A and American Funds Growth Fund of America R6 share 98.9% of their portfolios by weight — computed as Σ min(wA, wB) over every holding both funds own.
You would hold two tickers and get the diversification of 1.0. Two funds that shared nothing would score 2.0; two identical funds score 1.0.
Top shared holdings
AGTHX and RGAGX hold 308 of the same securities. The ten contributing most to the overlap figure:
| Holding | in AGTHX | in RGAGX | Δ |
|---|---|---|---|
| NVDA | 6.1% | 6.1% | 0.0% |
| AVGO | 4.3% | 4.3% | 0.0% |
| META | 4.2% | 4.2% | 0.0% |
| MSFT | 4.0% | 4.0% | 0.0% |
| 14020B | 3.5% | 3.5% | 0.0% |
| LLY | 3.3% | 3.3% | 0.0% |
| GOOG | 2.9% | 2.9% | 0.0% |
| GOOGL | 2.9% | 2.9% | 0.0% |
| AMZN | 2.9% | 2.9% | 0.0% |
| TSLA | 2.6% | 2.6% | 0.0% |
Where AGTHX and RGAGX 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 | AGTHX | RGAGX | Δ |
|---|---|---|---|
| Information Technology | 30.6% | 30.6% | +0.0pp |
| Consumer Discretionary | 12.7% | 12.7% | +0.0pp |
| Industrials | 9.8% | 9.8% | +0.0pp |
| Communication Services | 13.2% | 13.2% | +0.0pp |
| Unclassified | 7.6% | 7.6% | +0.0pp |
| Health Care | 11.0% | 11.0% | +0.0pp |
| Cash & Other | 1.2% | 1.2% | +0.0pp |
| Consumer Staples | 2.4% | 2.4% | +0.0pp |
Δ is AGTHX minus RGAGX, 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
0.0% of AGTHX by weight, held in no part of RGAGX.
0.0% of RGAGX by weight, held in no part of AGTHX.
A large count with a small weight is the usual shape: the positions one fund adds are typically its smallest ones.
Concentration and cost
| AGTHX | RGAGX | |
|---|---|---|
| Top 10 holdings | 36.7% | 36.7% |
| Positions held | 309 | 309 |
| Cost per $10,000 held, per year | $61 | $30 |
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 AGTHX and RGAGX overlap?
AGTHX and RGAGX overlap 98.9% by portfolio weight — they are effectively the same fund. They share 308 holdings. The figure comes from current issuer holdings files (AGTHX as of 2026-02-28, RGAGX as of 2026-02-28).
How is the overlap between AGTHX and RGAGX calculated?
As the sum of the smaller weight in each fund, over every holding both funds own: Σ min(wA, wB). If AGTHX holds a stock at 6% and RGAGX 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 AGTHX and RGAGX?
That depends on your goals — we state facts, not advice. At 98.9% overlap, most of what one fund holds, the other holds too. Expense ratios: AGTHX 0.61% versus RGAGX 0.30%.
What does AGTHX own that RGAGX doesn't?
AGTHX holds 309 positions and RGAGX holds 309; 0 of AGTHX's positions don't appear in RGAGX at all, and they are 0.0% of AGTHX by weight.
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Related comparisons
Sources: issuer holdings files, AGTHX as of 2026-02-28, RGAGX as of 2026-02-28. Weights are fractions of each fund. Diagnostics, not advice.