Fund · iShares 1-3 Year Treasury Bond ETF · measured from SEC filings
SHY holdings
SHY reports 90 holdings and behaves like 83.2 equally weighted ones, computed from its SEC Form N-PORT filing for 2026-05-31. The fact sheet publishes the first number; this page computes the second, and traces it across 27 quarters of filings.
Measured concentration
as of 2026-05-31Read this figure with the following in mind
1.6% of net assets is securities-lending cash collateral, excluded from the figure; counted as filed the fund would read 82.7
The figure below is what the filing says, published unchanged. What it may not do is sit beside a plain long-only fund and be read as the same quantity. How comparability is decided.
Computed 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: 1.81% at a quoted market price (level 1), one issuer country.
What stands out
as of 2026-05-31SHY's largest investment is U.S. Treasury Notes at 1.96% of net assets. U.S. Treasury Notes and U.S. Treasury Notes follow; the three together are 5.5%. Ten companies are 16.11% of the fund; the other 80 share the rest. Among the 192 bond funds measured here, SHY behaves like 83.2 holdings against a median of 236.4 — 2.9 times more concentrated than the median. Across 27 quarterly filings SHY has become less concentrated: it behaved like 31.4 at 2019-11-30 and 83.2 at 2026-05-31. Between the 2026-02-28 and 2026-05-31 filings 13 positions were added and 13 dropped; 13.6% 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
27Between 2019-11-30 and 2026-05-31, SHY went from behaving like 31.4 equally weighted positions to 83.2 — 165% more, while its top ten went from 45.2% to 16.11% of net assets. Read across the funds on the concentration-over-time table.
| Period | Holdings | Effective | Top 10 | Largest |
|---|---|---|---|---|
| 2026-05-31 | 90 | 83.2 | 16.11% | 1.97% |
| 2026-02-28 | 90 | 81.1 | 17.17% | 2.22% |
| 2025-11-30 | 89 | 79.2 | 17.88% | 2.34% |
| 2025-08-31 | 117 | 79.4 | 17.91% | 2.34% |
| 2025-05-31 | 122 | 77 | 19.26% | 2.55% |
| 2025-02-28 | 123 | 76.3 | 20.22% | 2.65% |
| 2024-11-30 | 119 | 60.9 | 26.65% | 4.93% |
| 2024-08-31 | 113 | 56.2 | 29.04% | 4.92% |
Earlier filings (19 more, back to 2019-11-30)
| Period | Holdings | Effective | Top 10 | Largest |
|---|---|---|---|---|
| 2024-05-31 | 102 | 51.1 | 32.28% | 5.25% |
| 2024-02-29 | 92 | 48.1 | 34.34% | 5.25% |
| 2023-11-30 | 81 | 44.1 | 35.9% | 5.25% |
| 2023-08-31 | 74 | 37.8 | 39.95% | 6.13% |
| 2023-05-31 | 78 | 33.3 | 43.83% | 6.07% |
| 2023-02-28 | 76 | 34.1 | 42.84% | 6.06% |
| 2022-11-30 | 78 | 37.3 | 39.68% | 6.21% |
| 2022-08-31 | 80 | 25.4 | 51.55% | 9.12% |
| 2022-05-31 | 69 | 24.4 | 52.95% | 9.24% |
| 2022-02-28 | 73 | 24.4 | 53.55% | 9.2% |
| 2021-11-30 | 78 | 20.3 | 56.26% | 13.45% |
| 2021-08-31 | 96 | 31.7 | 44.22% | 8.1% |
| 2021-05-31 | 88 | 36.3 | 41.65% | 7.19% |
| 2021-02-28 | 91 | 35.4 | 44.01% | 6.11% |
| 2020-11-30 | 79 | 31.2 | 48.66% | 6.24% |
| 2020-08-31 | 74 | 30.3 | 49.62% | 6.11% |
| 2020-05-31 | 78 | 32.2 | 46.65% | 6.06% |
| 2020-02-29 | 100 | 28.6 | 49.22% | 8.34% |
| 2019-11-30 | 92 | 31.4 | 45.2% | 8.38% |
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.
Compared with, in the essays
2Overlap with other funds
2Measured against every other fund on this site, from the same filings. Combined effective holdings is how the pair behaves held in equal size.
| With | Overlap | Shared | Combined effective |
|---|---|---|---|
| SHY vs IEF | 0.2% | 1 | 43.3 |
| SHY vs TLT | 0.2% | 1 | 91 |
As filed, collateral included
1.63% collateralSHY's filing lists 91 positions including 1.63% of net assets in securities-lending cash collateral. Counted as filed the fund reads 82.7 effective holdings with a top ten of 16.21%; on its own investments — the figure above — it reads 83.2 with a top ten of 16.11%. The collateral is matched by a liability and is not a holding the fund chose; since 2026-09-18 every figure on this site sets it aside (methodology). Both numbers are in the data.
Largest positions, as filed
as of 2026-05-31The 15 largest of 90 positions in SHY's Form N-PORT, weight as a share of net assets, securities-lending collateral excluded. Every position, every quarter: SHY.csv.gz.
| # | Position | Weight | Cumulative |
|---|---|---|---|
| 1 | United States of America | 1.97% | 2.0% |
| 2 | United States of America | 1.85% | 3.8% |
| 3 | United States of America | 1.72% | 5.5% |
| 4 | United States of America | 1.62% | 7.2% |
| 5 | United States of America | 1.61% | 8.8% |
| 6 | United States of America | 1.53% | 10.3% |
| 7 | United States of America | 1.49% | 11.8% |
| 8 | United States of America | 1.46% | 13.3% |
| 9 | United States of America | 1.44% | 14.7% |
| 10 | United States of America | 1.41% | 16.1% |
| 11 | United States of America | 1.40% | 17.5% |
| 12 | United States of America | 1.39% | 18.9% |
| 13 | United States of America | 1.39% | 20.3% |
| 14 | United States of America | 1.39% | 21.7% |
| 15 | United States of America | 1.37% | 23.0% |
Returns the fund reported
2019-09 – 2026-05Monthly total returns from Item B.5 of SHY's own filings, 81 months on record. Not computed here and not from a price feed.
Cross-checked against a series computed separately from prices: median difference 0.02 percentage points over 81 months, which is roughly the distributions. Every month with the filing it came from: SHY.json · all funds.
Who borrows SHY's shares
2026-05-31The fund lends its holdings, and Item B.4.a of the filing names every firm holding them. At 2026-05-31, $403m was out to 2 borrowers, 1.59% of net assets. The largest, STATE STREET BANK & TRUST COMPANY, held 87.7% of it.
| Borrower | On loan | Share of the loan |
|---|---|---|
| STATE STREET BANK & TRUST COMPANY | $354m | 87.7% |
| Societe Generale | $50m | 12.3% |
Cash collateral reported against the loan: 1.63% of net assets, 102.8% of the amount lent. That is a floor on the collateral, not the whole of it — collateral the fund does not hold as a position is not in this filing, so a figure under 100% is not evidence of under-collateralisation. How that figure behaves across all funds. Every quarter SHY has filed, with each borrower: SHY.json · all funds.
Since the previous filing
2026-02-28 → 2026-05-3190 positions became 90: 13 added (12.9% of the fund at the later date), 13 dropped (13.4% at the earlier date). Half the sum of all weight changes, a turnover proxy: 13.6%. Positions are matched on identifiers, so a security whose identifier changed shows as one drop and one add. Every filing of SHY compared this way, as a feed: changes.xml · all funds: filings received.
| Largest increases | 2026-02-28 | 2026-05-31 | Largest decreases | 2026-02-28 | 2026-05-31 |
|---|---|---|---|---|---|
| United States of America | 0.66% | 1.13% | BlackRock Funds III | 0.27% | 0.20% |
| United States of America | 1.17% | 1.19% | United States of America | 1.26% | 1.25% |
| United States of America | 1.38% | 1.40% | United States of America | 1.26% | 1.25% |
| United States of America | 1.17% | 1.19% | United States of America | 1.14% | 1.13% |
| United States of America | 1.60% | 1.62% | United States of America | 1.24% | 1.24% |
| United States of America | 0.99% | 1.00% | United States of America | 1.08% | 1.07% |
New: United States of America (1.53%), United States of America (1.37%), United States of America (1.30%), United States of America (1.17%), United States of America (1.08%), United States of America (1.00%). Gone: United States of America (2.22%), United States of America (1.63%), United States of America (1.56%), United States of America (1.54%), United States of America (1.20%), United States of America (1.15%).
Asset categories and pricing
as of 2026-05-3198.19% debt, 1.81% short-term investment as filed; 1.8% 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 SHY (83.2). Same filings, same arithmetic. Position in this list says nothing about which fund is better.
| Fund | Reports | Behaves like | Top ten | As of |
|---|---|---|---|---|
| SCHQ Schwab Long-Term U.S. Treasury ETF | 100 | 75.9 | 21.59% | 2026-06-30 |
| GTO Invesco Total Return Bond ETF | 1,793 | 78.9 | 29.04% | 2026-07-31 |
| SYSB iShares Systematic Bond ETF | 838 | 79 | 26.34% | 2026-07-31 |
| JCPB JPMorgan Core Plus Bond ETF | 2,677 | 81.3 | 21.19% | 2026-05-31 |
| SCHR Schwab Intermediate-Term U.S. Treasury ETF | 102 | 82.4 | 19.13% | 2026-06-30 |
| VGIT Vanguard Intermediate-Term Treasury Index Fund | 104 | 84 | 18.93% | 2026-05-31 |
| CGCP Capital Group Core Plus Income ETF | 1,476 | 84.5 * | 25.35% | 2026-06-30 |
| ANGL VanEck Fallen Angel High Yield Bond ETF | 129 | 86.1 | 22.76% | 2026-07-31 |
| APLU Allspring Core Plus ETF | 543 | 86.2 | 26.63% | 2026-05-31 |
| VGSH Vanguard Short-Term Treasury Index Fund | 92 | 88.2 | 14% | 2026-05-31 |
Essays that examine SHY
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Mentions 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.