Fund · PIMCO 25+ Year Zero Coupon U.S. Treasury Index Exchange-Traded Fund · measured from SEC filings
ZROZ holdings
ZROZ reports 20 holdings and behaves like 19.8 equally weighted ones, computed from its SEC Form N-PORT filing for 2026-06-30. The fact sheet publishes the first number; this page computes the second, and traces it across 28 quarters of filings.
Measured concentration
as of 2026-06-30Computed by this site from the fund's SEC Form N-PORT filing; what the measure does not tell you · every fund in one table · hold it with other funds? X-ray the mix. Pricing: 0% at a quoted market price (level 1), one issuer country.
What stands out
as of 2026-06-30ZROZ's largest investment is U.S. Treasury Strips Principal at 5.55% of net assets. U.S. Treasury Strips Principal and U.S. Treasury Strips Principal follow; the three together are 16.44%. Ten companies are 53.29% of the fund; the other 10 share the rest. Among the 192 bond funds measured here, ZROZ behaves like 19.8 holdings against a median of 236.4 — 12.5 times more concentrated than the median. Across 28 quarterly filings ZROZ has held roughly steady since 2019-09-30 (20 then, 19.8 now). Between the 2026-03-31 and 2026-06-30 filings 1 positions were added and 1 dropped; 7.6% of the weight moved.
Each sentence is read from the fund's own SEC filing; the class median is computed across the comparable bond funds on this site. Nothing here is a view on the fund.
Every filing since 2019
28Between 2019-09-30 and 2026-06-30, ZROZ went from behaving like 20 equally weighted positions to 19.8 — 1% fewer, while its top ten went from 51.36% to 53.29% of net assets. Read across the funds on the concentration-over-time table.
| Period | Holdings | Effective | Top 10 | Largest |
|---|---|---|---|---|
| 2026-06-30 | 20 | 19.8 | 53.29% | 5.55% |
| 2026-03-31 | 20 | 19.6 | 55.36% | 5.9% |
| 2025-12-31 | 20 | 19.6 | 54.67% | 5.82% |
| 2025-09-30 | 20 | 19.6 | 54.86% | 6.05% |
| 2025-06-30 | 20 | 19.6 | 54.87% | 5.96% |
| 2025-03-31 | 20 | 19.6 | 55.1% | 5.96% |
| 2024-12-31 | 23 | 20.1 | 54.93% | 5.91% |
| 2024-09-30 | 22 | 19.6 | 54.88% | 5.94% |
Earlier filings (20 more, back to 2019-09-30)
| Period | Holdings | Effective | Top 10 | Largest |
|---|---|---|---|---|
| 2024-06-30 | 22 | 19.8 | 54.07% | 5.79% |
| 2024-03-31 | 21 | 20 | 53.55% | 5.76% |
| 2023-12-31 | 21 | 20.1 | 54.1% | 5.83% |
| 2023-09-30 | 21 | 20 | 54.44% | 6.09% |
| 2023-06-30 | 24 | 20 | 54.1% | 5.99% |
| 2023-03-31 | 23 | 19.9 | 54.07% | 5.95% |
| 2022-12-31 | 22 | 20.3 | 53.99% | 5.85% |
| 2022-09-30 | 22 | 20.3 | 52.71% | 5.87% |
| 2022-06-30 | 21 | 19.9 | 52.41% | 5.87% |
| 2022-03-31 | 21 | 20.1 | 52.19% | 5.86% |
| 2021-12-31 | 22 | 20.2 | 52.03% | 5.82% |
| 2021-09-30 | 20 | 20 | 51.3% | 5.26% |
| 2021-06-30 | 20 | 20 | 51.33% | 5.26% |
| 2021-03-31 | 21 | 20 | 51.56% | 5.3% |
| 2020-12-31 | 23 | 20.2 | 51.17% | 5.24% |
| 2020-09-30 | 21 | 20 | 51.29% | 5.28% |
| 2020-06-30 | 21 | 20 | 51.11% | 5.2% |
| 2020-03-31 | 20 | 20 | 51.22% | 5.2% |
| 2019-12-31 | 20 | 20 | 51.55% | 5.29% |
| 2019-09-30 | 20 | 20 | 51.36% | 5.29% |
One row per filed reporting period, newest first, read from EDGAR. Quarterly because that is the public filing cadence. Rows marked * are published but held out of the comparison above; the methodology page says when and why.
Largest positions, as filed
as of 2026-06-30The 15 largest of 20 positions in ZROZ's Form N-PORT, weight as a share of net assets, securities-lending collateral excluded. Every position, every quarter: ZROZ.csv.gz.
| # | Position | Weight | Cumulative |
|---|---|---|---|
| 1 | United States Treasury | 5.55% | 5.5% |
| 2 | United States Treasury | 5.48% | 11.0% |
| 3 | United States Treasury | 5.42% | 16.4% |
| 4 | United States Treasury | 5.40% | 21.8% |
| 5 | United States Treasury | 5.29% | 27.1% |
| 6 | United States Treasury | 5.27% | 32.4% |
| 7 | United States Treasury | 5.26% | 37.7% |
| 8 | United States Treasury | 5.25% | 42.9% |
| 9 | United States Treasury | 5.23% | 48.1% |
| 10 | United States Treasury | 5.16% | 53.3% |
| 11 | United States Treasury | 5.14% | 58.4% |
| 12 | United States Treasury | 5.12% | 63.6% |
| 13 | United States Treasury | 4.99% | 68.5% |
| 14 | United States Treasury | 4.91% | 73.5% |
| 15 | United States Treasury | 4.80% | 78.2% |
Returns the fund reported
2019-07 – 2026-06Monthly total returns from Item B.5 of ZROZ's own filings, 84 months on record. Not computed here and not from a price feed.
Cross-checked against a series computed separately from prices: median difference 0.18 percentage points over 84 months, which is roughly the distributions. Every month with the filing it came from: ZROZ.json · all funds.
Since the previous filing
2026-03-31 → 2026-06-3020 positions became 20: 1 added (5.0% of the fund at the later date), 1 dropped (5.8% at the earlier date). Half the sum of all weight changes, a turnover proxy: 7.6%. Positions are matched on identifiers, so a security whose identifier changed shows as one drop and one add. Every filing of ZROZ compared this way, as a feed: changes.xml · all funds: filings received.
| Largest increases | 2026-03-31 | 2026-06-30 | Largest decreases | 2026-03-31 | 2026-06-30 |
|---|---|---|---|---|---|
| United States Treasury | 3.11% | 4.80% | United States Treasury | 5.90% | 5.26% |
| United States Treasury | 5.40% | 5.48% | United States Treasury | 5.89% | 5.27% |
| United States Treasury | 4.83% | 4.91% | United States Treasury | 5.81% | 5.23% |
| United States Treasury | 4.63% | 4.70% | |||
| United States Treasury | 4.58% | 4.65% | |||
| United States Treasury | 5.35% | 5.42% |
New: United States Treasury (4.99%). Gone: UNITED STATES GOVT (5.78%).
Asset categories and pricing
as of 2026-06-30100.00% debt as filed; 0.0% carried at a quoted market price (fair-value level 1). Categories and levels are the filer's; what a low level-1 share does and does not mean is in the measure's page.
Neighbours by effective holdings, debt funds
10Every measured debt fund lined up by how many holdings it behaves like; these sit either side of ZROZ (19.8). Same filings, same arithmetic. Position in this list says nothing about which fund is better.
| Fund | Reports | Behaves like | Top ten | As of |
|---|---|---|---|---|
| CSHI NEOS Enhanced Income 1-3 Month T-Bill ETF | 19 | 13.2 | 78.04% | 2026-06-30 |
| TDTF FlexShares iBoxx 5-Year Target Duration TIPS Index Fund | 17 | 13.5 | 71.87% | 2026-07-31 |
| SDCI USCF SummerHaven Dynamic Commodity Strategy No K-1 Fund | 31 | 13.5 * | 73.97% | 2026-06-30 |
| LTPZ PIMCO 15+ Year U.S. TIPS Index Exchange-Traded Fund | 16 | 13.6 | 78.33% | 2026-06-30 |
| TDTT FlexShares iBoxx 3-Year Target Duration TIPS Index Fund | 23 | 14.9 | 65.87% | 2026-07-31 |
| IBHF iShares iBonds 2026 Term High Yield and Income ETF | 117 | 20.2 | 42.17% | 2026-07-31 |
| IBDR iShares iBonds Dec 2026 Term Corporate ETF | 230 | 21.2 | 31.6% | 2026-07-31 |
| FLGV Franklin U.S. Treasury Bond ETF | 49 | 21.8 | 57.41% | 2026-06-30 |
| VBIL Vanguard 0-3 Month Treasury Bill ETF | 27 | 22.4 | 54.26% | 2026-06-30 |
| IBTK iShares iBonds Dec 2030 Term Treasury ETF | 27 | 22.5 | 52.83% | 2026-07-31 |
Essays that examine ZROZ
0Mentions are detected across the full text of every article, so an appearance may be a passing comparison rather than the subject. Nothing here is a recommendation to buy or sell — see the disclaimer.