TSP I Fund: what's actually inside it
Officially the International Stock Index Investment Fund. International company stocks, developed and emerging markets. Tracks a broad index of non-US developed and emerging markets.
8,468 holdings · expense ratio 0.054% · top 10 = 14.8% · concentration score 1.9/100 · holdings as of 2026-07-31
Top 25 holdings
| # | Holding | Weight | |
|---|---|---|---|
| 1 | 2330 | 4.04% | |
| 2 | CASH | 2.45% | |
| 3 | 005930 | 1.81% | |
| 4 | ASML | 1.43% | |
| 5 | 000660 | 1.41% | |
| 6 | 700 | 0.86% | |
| 7 | HSBA | 0.82% | |
| 8 | ROP | 0.69% | |
| 9 | SAN | 0.67% | |
| 10 | RY | 0.66% | |
| 11 | NOVN | 0.65% | |
| 12 | 9988 | 0.63% | |
| 13 | SU | 0.59% | |
| 14 | NESN | 0.58% | |
| 15 | SHEL | 0.58% | |
| 16 | AZN | 0.57% | |
| 17 | 8306 | 0.55% | |
| 18 | SIE | 0.54% | |
| 19 | BHP | 0.48% | |
| 20 | CBA | 0.47% | |
| 21 | 7203 | 0.46% | |
| 22 | TD | 0.45% | |
| 23 | SAP | 0.44% | |
| 24 | ALV | 0.43% | |
| 25 | TTE | 0.38% |
Sector split
Overlap with the other TSP funds
The question a federal employee can actually act on: holding two of these, how much is the same underlying company?
| Paired with | Overlap | Effective Funds (50/50) |
|---|---|---|
| TSP S Fund | 4.6% | 2.0 |
| TSP F Fund | 2.5% | 2.0 |
| TSP C Fund | 0.9% | 2.0 |
What has changed
We started recording TSP I Fund's headline figures in July 2026. There is only one month on record so far, so there is nothing to compare it against yet — check back next month.
Frequently asked
What does the TSP I Fund actually hold?
The I Fund — officially the International Stock Index Investment Fund — tracks a broad index of non-US developed and emerging markets. The Thrift Savings Plan does not publish a holdings list and does not file SEC form N-PORT, so this page shows the 8,468 positions of VXUS, which tracks the same index, as of 2026-07-31. The largest position is 2330 at 4.0%, and the top ten are 14.8% of the fund.
Is this the TSP's real holdings data?
No, and that distinction matters. It is a labelled proxy: a different fund tracking the same index, not the I Fund itself. VXUS holds a broad ex-US basket and is the closest covered equivalent to the I Fund's mandate. Index funds tracking the same benchmark hold nearly identical portfolios, so the picture is close — but the weights are VXUS's, not the TSP's, and the TSP has never published its own.
How much do the TSP funds overlap each other?
The I Fund overlaps the S Fund 4.6% by weight — S Fund 4.6%, F Fund 2.5%, C Fund 0.9%. Overlap is the sum of the smaller weight in each fund over every holding both own, computed from the proxy holdings described above.
Why isn't the G Fund shown?
The G Fund — officially the Government Securities Investment Fund — is deliberately absent. It holds non-marketable US Treasury securities issued only to the TSP, which are not traded anywhere and have no market equivalent. Showing it through a bond fund would misrepresent an instrument whose defining feature is that its principal cannot fall.
Most federal employees hold more than the TSP
A TSP account is rarely the whole picture — there is often an IRA, a spouse's 401(k), or a brokerage account alongside it. Paste them all together to see the real overlap between your I Fund and everything else you own, and your own Effective Funds number. Free, no account, nothing stored.
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How it overlaps the other TSP funds
TSP I Fund shown via VXUS, holdings as of 2026-07-31. The TSP publishes no holdings of its own. Weights are fractions of the fund. Diagnostics, not advice.