ANCFX vs VTIAX: 10% overlap
American Funds Fundamental Investors A and Vanguard Total International Stock Index Admiral share 9.8% of their portfolios by weight — computed as Σ min(wA, wB) over every holding both funds own.
Different holding dates. These holdings were published about 3 months apart — ANCFX as of 2026-03-31, the rest through 2026-06-30. 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 1.9. Two funds that shared nothing would score 2.0; two identical funds score 1.0.
Top shared holdings
ANCFX and VTIAX hold 55 of the same securities. The ten contributing most to the overlap figure:
| Holding | in ANCFX | in VTIAX | Δ |
|---|---|---|---|
| 2330 | 2.2% | 4.3% | 2.1% |
| 000660 | 1.7% | 2.2% | 0.5% |
| NESN | 0.6% | 0.6% | 0.0% |
| ASML | 0.4% | 1.7% | 1.3% |
| RR- | 0.8% | 0.4% | 0.4% |
| TTE | 0.4% | 0.3% | 0.1% |
| BN | 0.4% | 0.3% | 0.1% |
| SHOP | 0.8% | 0.3% | 0.5% |
| BATS | 2.3% | 0.3% | 2.0% |
| SHEL | 0.3% | 0.5% | 0.2% |
Where ANCFX and VTIAX 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 | ANCFX | VTIAX | Δ |
|---|---|---|---|
| Financials | 8.1% | 19.7% | −11.5pp |
| Information Technology | 27.8% | 20.9% | +7.0pp |
| Communication Services | 9.0% | 3.3% | +5.7pp |
| Consumer Staples | 9.4% | 4.9% | +4.6pp |
| Materials | 2.2% | 5.2% | −3.0pp |
| Cash and/or Derivatives | 0.0% | 2.5% | −2.5pp |
| Industrials | 12.0% | 13.8% | −1.8pp |
| Consumer Discretionary | 8.9% | 7.5% | +1.4pp |
Δ is ANCFX minus VTIAX, 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
80.8% of ANCFX by weight, held in no part of VTIAX.
83.7% of VTIAX by weight, held in no part of ANCFX.
A large count with a small weight is the usual shape: the positions one fund adds are typically its smallest ones.
Concentration and cost
| ANCFX | VTIAX | |
|---|---|---|
| Top 10 holdings | 34.1% | 16.3% |
| Positions held | 233 | 8,453 |
| Cost per $10,000 held, per year | $61 | $9 |
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 ANCFX and VTIAX overlap?
ANCFX and VTIAX overlap 9.8% by portfolio weight — largely distinct portfolios. They share 55 holdings. The figure comes from current issuer holdings files (ANCFX as of 2026-03-31, VTIAX as of 2026-06-30).
How is the overlap between ANCFX and VTIAX calculated?
As the sum of the smaller weight in each fund, over every holding both funds own: Σ min(wA, wB). If ANCFX holds a stock at 6% and VTIAX 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 ANCFX and VTIAX?
That depends on your goals — we state facts, not advice. At 9.8% overlap, each fund still contributes meaningfully distinct exposure.
What does ANCFX own that VTIAX doesn't?
ANCFX holds 233 positions and VTIAX holds 8,453; 177 of ANCFX's positions don't appear in VTIAX at all, and they are 80.8% of ANCFX by weight.
You probably hold more than two funds
This page compares ANCFX and VTIAX. Paste your whole portfolio — brokerage, 401(k), IRA — and see the overlap across every fund at once, plus what you actually own underneath them and your own Effective Funds number. Free, no account, nothing stored.
X-ray my portfolio — free →Watch ANCFX vs VTIAX
We re-read both funds’ published holdings every weeknight. Leave an address and we'll tell you when what's inside actually changes.
Not sending yet — email alerts are built but switched off, and you'll be among the first when they turn on. No spam, one-click unsubscribe.
Related comparisons
Sources: issuer holdings files, ANCFX as of 2026-03-31, VTIAX as of 2026-06-30. Weights are fractions of each fund. Diagnostics, not advice.