Fund · iShares iBonds Dec 2030 Term Treasury ETF · measured from SEC filings
IBTK holdings
IBTK reports 27 holdings and behaves like 22.5 equally weighted ones, computed from its SEC Form N-PORT filing for 2026-07-31. The fact sheet publishes the first number; this page computes the second, and traces it across 24 quarters of filings.
Measured concentration
as of 2026-07-31Computed 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: 0.43% at a quoted market price (level 1), one issuer country.
What stands out
as of 2026-07-31IBTK's largest investment is U.S. Treasury Notes at 7.01% of net assets. U.S. Treasury Notes and U.S. Treasury Notes follow; the three together are 19.41%. Ten companies are 52.83% of the fund; the other 17 share the rest. Among the 192 bond funds measured here, IBTK behaves like 22.5 holdings against a median of 236.4 — 10.0 times more concentrated than the median. Across 24 quarterly filings IBTK has become less concentrated: it behaved like 2 at 2020-07-31 and 22.6 at 2026-04-30.
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 2020
24Between 2020-07-31 and 2026-04-30, IBTK went from behaving like 2 equally weighted positions to 22.6 — 1030% more, while its top ten went from 100% to 52.68% of net assets. Read across the funds on the concentration-over-time table.
| Period | Holdings | Effective | Top 10 | Largest |
|---|---|---|---|---|
| 2026-04-30 | 27 | 22.6 | 52.68% | 7.05% |
| 2026-01-31 | 27 | 22.5 | 52.94% | 7.08% |
| 2025-10-31 | 24 | 17.9 | 64.35% | 8.52% |
| 2025-07-31 | 21 | 17.1 | 66.23% | 8.82% |
| 2025-04-30 | 18 | 13.9 | 76.69% | 11.99% |
| 2025-01-31 | 16 | 10.5 | 85.85% | 17.89% |
| 2024-10-31 | 16 | 10.6 | 85.58% | 17.89% |
| 2024-07-31 | 16 | 10.4 | 86.55% | 17.96% |
Earlier filings (16 more, back to 2020-07-31)
| Period | Holdings | Effective | Top 10 | Largest |
|---|---|---|---|---|
| 2024-04-30 | 16 | 10.5 | 86.46% | 17.85% |
| 2024-01-31 | 16 | 8.9 | 91.95% | 18.67% |
| 2023-10-31 | 13 | 8.4 | 94.88% | 19.68% |
| 2023-07-31 | 9 | 6.4 | 100% | 22.11% |
| 2023-04-30 | 7 | 5.3 | 100% | 24.16% |
| 2023-01-31 | 5 | 3.8 | 100% | 30.84% |
| 2022-10-31 | 5 | 3.9 | 100% | 30.67% |
| 2022-07-31 | 5 | 3.9 | 100% | 30.88% |
| 2022-04-30 | 5 | 3.9 | 100% | 30.75% |
| 2022-01-31 | 5 | 3.9 | 100% | 30.82% |
| 2021-10-31 | 5 | 3.9 | 100% | 30.86% |
| 2021-07-31 | 5 | 3.9 | 100% | 27.46% |
| 2021-04-30 | 5 | 4 | 100% | 27.38% |
| 2021-01-31 | 4 | 3.4 | 100% | 40.29% |
| 2020-10-31 | 3 | 3 | 100% | 36.39% |
| 2020-07-31 | 2 | 2 | 100% | 52.89% |
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 2026-04-30The 15 largest of 27 positions in IBTK's Form N-PORT, weight as a share of net assets, securities-lending collateral excluded. Every position, every quarter: IBTK.csv.gz.
| # | Position | Weight | Cumulative |
|---|---|---|---|
| 1 | United States of America | 7.05% | 7.1% |
| 2 | United States of America | 6.41% | 13.5% |
| 3 | United States of America | 6.08% | 19.5% |
| 4 | United States of America | 4.76% | 24.3% |
| 5 | United States of America | 4.75% | 29.1% |
| 6 | United States of America | 4.75% | 33.8% |
| 7 | United States of America | 4.73% | 38.5% |
| 8 | United States of America | 4.73% | 43.3% |
| 9 | United States of America | 4.71% | 48.0% |
| 10 | United States of America | 4.70% | 52.7% |
| 11 | United States of America | 4.68% | 57.4% |
| 12 | United States of America | 4.68% | 62.0% |
| 13 | United States of America | 4.67% | 66.7% |
| 14 | United States of America | 4.65% | 71.3% |
| 15 | United States of America | 3.54% | 74.9% |
Returns the fund reported
2020-07 – 2026-04Monthly total returns from Item B.5 of IBTK's own filings, 70 months on record. Not computed here and not from a price feed.
Cross-checked against a series computed separately from prices: median difference — percentage points over 0 months, which is roughly the distributions. Every month with the filing it came from: IBTK.json · all funds.
Who borrows IBTK's shares
2021-04-30The fund lends its holdings, and Item B.4.a of the filing names every firm holding them. At 2021-04-30, $626,555 was out to 1 borrower, 27.15% of net assets.
| Borrower | On loan | Share of the loan |
|---|---|---|
| CITIGROUP GLOBAL MARKETS INC. | $626,555 | 100.0% |
The filing reports no cash collateral position against this loan. Collateral taken in a form the fund does not hold as a position does not appear in N-PORT, so this is silence rather than absence. What the collateral figure can and cannot show. Every quarter IBTK has filed, with each borrower: IBTK.json · all funds.
Since the previous filing
2026-01-31 → 2026-04-3027 positions became 27: 0 added (0.0% of the fund at the later date), 0 dropped (0.0% at the earlier date). Half the sum of all weight changes, a turnover proxy: 0.6%. Positions are matched on identifiers, so a security whose identifier changed shows as one drop and one add. Every filing of IBTK compared this way, as a feed: changes.xml · all funds: filings received.
| Largest increases | 2026-01-31 | 2026-04-30 | Largest decreases | 2026-01-31 | 2026-04-30 |
|---|---|---|---|---|---|
| BlackRock Funds III | 0.17% | 0.46% | United States of America | 2.35% | 2.26% |
| United States of America | 4.55% | 4.65% | United States of America | 4.80% | 4.71% |
| United States of America | 2.65% | 2.68% | United States of America | 4.74% | 4.67% |
| United States of America | 4.64% | 4.68% | United States of America | 2.62% | 2.56% |
| United States of America | 4.64% | 4.68% | United States of America | 4.79% | 4.73% |
| United States of America | 4.70% | 4.73% | United States of America | 6.46% | 6.41% |
Asset categories and pricing
as of 2026-07-3199.57% debt, 0.43% short-term investment as filed; 0.4% 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 IBTK (22.5). Same filings, same arithmetic. Position in this list says nothing about which fund is better.
| Fund | Reports | Behaves like | Top ten | As of |
|---|---|---|---|---|
| ZROZ PIMCO 25+ Year Zero Coupon U.S. Treasury Index Exchange-Traded Fund | 20 | 19.8 | 53.29% | 2026-06-30 |
| 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 |
| STIP iShares 0-5 Year TIPS Bond ETF | 25 | 23 | 50.2% | 2026-07-31 |
| FTRB Federated Hermes Total Return Bond ETF | 696 | 24.5 | 47.96% | 2026-06-30 |
| AGZ iShares Agency Bond ETF | 100 | 25.5 | 50.6% | 2026-05-31 |
| ULST State Street(R) Ultra Short Term Bond ETF | 319 | 26.1 | 48.18% | 2026-06-30 |
| TIPX State Street(R) SPDR(R) Bloomberg 1-10 Year TIPS ETF | 33 | 29.4 | 39.01% | 2026-06-30 |
Essays that examine IBTK
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.