Fund · State Street(R) SPDR(R) Bloomberg 3-12 Month T-Bill ETF · measured from SEC filings
BILS holdings
BILS reports 29 holdings and behaves like 23.8 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 24 quarters of filings.
Measured concentration
as of 2026-06-30Read this figure with the following in mind
100% held in short-term investment vehicles: this is a cash-like fund, and its holding count measures something different
7.7% of net assets is securities-lending cash collateral, excluded from the figure; counted as filed the fund would read 20.8
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: 7.49% at a quoted market price (level 1), one issuer country.
What stands out
as of 2026-06-30BILS's largest investment is U.S. Treasury Bills at 6.87% of net assets. U.S. Treasury Bills and U.S. Treasury Bills follow; the three together are 20%. Ten companies are 51.34% of the fund; the other 19 share the rest. Among the 12 short-term funds measured here, BILS behaves like 23.8 holdings against a median of 9.5 — 2.5 times the median. Across 24 quarterly filings BILS has become less concentrated: it behaved like 16.4 at 2020-09-30 and 23.8 at 2026-06-30. Between the 2026-03-31 and 2026-06-30 filings 18 positions were added and 19 dropped; 77.4% of the weight moved.
Each sentence is read from the fund's own SEC filing; the class median is computed across the comparable short-term funds on this site. Nothing here is a view on the fund.
Every filing since 2020
24Between 2020-09-30 and 2026-06-30, BILS went from behaving like 16.4 equally weighted positions to 23.8 — 45% more, while its top ten went from 65.35% to 51.34% of net assets. Read across the funds on the concentration-over-time table.
| Period | Holdings | Effective | Top 10 | Largest |
|---|---|---|---|---|
| 2026-06-30 | 29 | 23.8 | 51.34% | 6.87% |
| 2026-03-31 | 30 | 23.8 | 51.36% | 6.92% |
| 2025-12-31 | 25 | 22.9 | 49.79% | 6.85% |
| 2025-09-30 | 25 | 21.4 | 53.17% | 7.34% |
| 2025-06-30 | 29 | 24.6 | 49.94% | 6.85% |
| 2025-03-31 | 31 | 25.2 | 49.2% | 6.91% |
| 2024-12-31 | 25 | 22.2 | 51.47% | 7.19% |
| 2024-09-30 | 29 | 23.5 | 52.37% | 7.28% |
Earlier filings (16 more, back to 2020-09-30)
| Period | Holdings | Effective | Top 10 | Largest |
|---|---|---|---|---|
| 2024-06-30 | 29 | 23.2 | 52.92% | 6.92% |
| 2024-03-31 | 27 | 23.2 | 49.73% | 6.75% |
| 2023-12-31 | 26 | 23.2 | 50.33% | 6.76% |
| 2023-09-30 | 26 | 22.3 | 51.85% | 7.12% |
| 2023-06-30 | 25 | 20.6 | 59.79% | 7.15% |
| 2023-03-31 | 26 | 21.9 | 52.95% | 8.8% |
| 2022-12-31 | 26 | 22.9 | 50.44% | 7.3% |
| 2022-09-30 | 20 | 18.3 | 59.81% | 8.48% |
| 2022-06-30 | 22 | 17.6 | 63.63% | 9.3% |
| 2022-03-31 | 22 | 18.2 | 60.35% | 9.98% |
| 2021-12-31 | 21 | 17.4 | 63.11% | 10.31% |
| 2021-09-30 | 21 | 16.7 | 63.88% | 12.47% |
| 2021-06-30 | 21 | 18 | 61.68% | 8.49% |
| 2021-03-31 | 21 | 17.2 | 64.21% | 10.52% |
| 2020-12-31 | 21 | 16.1 | 66.47% | 11.09% |
| 2020-09-30 | 21 | 16.4 | 65.35% | 12.43% |
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.
As filed, collateral included
7.72% collateralBILS's filing lists 30 positions including 7.72% of net assets in securities-lending cash collateral. Counted as filed the fund reads 20.8 effective holdings with a top ten of 54.9%; on its own investments — the figure above — it reads 23.8 with a top ten of 51.34%. 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 2026-06-30The 15 largest of 29 positions in BILS's Form N-PORT, weight as a share of net assets, securities-lending collateral excluded. Every position, every quarter: BILS.csv.gz.
| # | Position | Weight | Cumulative |
|---|---|---|---|
| 1 | United States Treasury | 6.87% | 6.9% |
| 2 | United States Treasury | 6.70% | 13.6% |
| 3 | United States Treasury | 6.43% | 20.0% |
| 4 | United States Treasury | 5.34% | 25.3% |
| 5 | United States Treasury | 4.47% | 29.8% |
| 6 | United States Treasury | 4.47% | 34.3% |
| 7 | United States Treasury | 4.40% | 38.7% |
| 8 | United States Treasury | 4.29% | 43.0% |
| 9 | United States Treasury | 4.21% | 47.2% |
| 10 | United States Treasury | 4.17% | 51.3% |
| 11 | United States Treasury | 4.16% | 55.5% |
| 12 | United States Treasury | 4.16% | 59.7% |
| 13 | United States Treasury | 3.80% | 63.5% |
| 14 | United States Treasury | 3.69% | 67.2% |
| 15 | United States Treasury | 2.82% | 70.0% |
Returns the fund reported
2020-09 – 2026-06Monthly total returns from Item B.5 of BILS'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 0.01 percentage points over 68 months, which is roughly the distributions. Every month with the filing it came from: BILS.json · all funds.
Who borrows BILS's shares
2026-06-30The fund lends its holdings, and Item B.4.a of the filing names every firm holding them. At 2026-06-30, $293m was out to 2 borrowers, 7.57% of net assets. The largest, GOLDMAN SACHS & CO., held 66.5% of it.
| Borrower | On loan | Share of the loan |
|---|---|---|
| GOLDMAN SACHS & CO. | $195m | 66.5% |
| MORGAN STANLEY & CO LLC | $98m | 33.5% |
Cash collateral reported against the loan: 7.72% of net assets, 102% 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 BILS has filed, with each borrower: BILS.json · all funds.
Since the previous filing
2026-03-31 → 2026-06-3029 positions became 28: 18 added (57.7% of the fund at the later date), 19 dropped (77.2% at the earlier date). Half the sum of all weight changes, a turnover proxy: 77.4%. Positions are matched on identifiers, so a security whose identifier changed shows as one drop and one add. Every filing of BILS 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 | 2.67% | 6.87% | United States Treasury | 2.74% | 2.51% |
| United States Treasury | 2.66% | 6.70% | |||
| United States Treasury | 2.63% | 6.43% | |||
| United States Treasury | 2.78% | 5.34% | |||
| United States Treasury | 2.43% | 4.40% | |||
| United States Treasury | 2.44% | 4.29% |
New: United States Treasury (4.47%), United States Treasury (4.47%), United States Treasury (4.21%), United States Treasury (4.17%), United States Treasury (4.16%), United States Treasury (4.16%). Gone: United States Treasury (6.92%), United States Treasury (6.89%), United States Treasury (6.83%), United States Treasury (5.17%), United States Treasury (4.36%), United States Treasury (4.35%).
Asset categories and pricing
as of 2026-06-30100.00% short-term investment as filed; 7.5% 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, short-term investment funds
9Every measured short-term investment fund lined up by how many holdings it behaves like; these sit either side of BILS (23.8). Same filings, same arithmetic. Position in this list says nothing about which fund is better.
| Fund | Reports | Behaves like | Top ten | As of |
|---|---|---|---|---|
| TSLL Direxion Daily TSLA Bull 2X Shares | 6 | 5 * | 100% | 2026-07-31 |
| ALLW State Street(R) Bridgewater(R) All Weather(R) ETF | 41 | 8.2 * | 78.13% | 2026-07-31 |
| BIL State Street(R) SPDR(R) Bloomberg 1-3 Month T-Bill ETF | 24 | 14.9 | 74.44% | 2026-06-30 |
| XHLF BondBloxx Bloomberg Six Month Target Duration US Treasury ETF | 28 | 15.2 | 75.74% | 2026-07-31 |
| SGOV iShares 0-3 Month Treasury Bond ETF | 23 | 17.2 | 66.79% | 2026-05-31 |
| CMDY iShares Bloomberg Roll Select Commodity Strategy ETF | 88 | 35.1 * | 40.84% | 2026-07-31 |
| SHV iShares 0-1 Year Treasury Bond ETF | 64 | 38 | 37.93% | 2026-05-31 |
| COMT iShares GSCI Commodity Dynamic Roll Strategy ETF | 160 | 55.8 * | 24.21% | 2026-07-31 |
| BKUI BNY Mellon Ultra Short Income ETF | 157 | 80.5 | 22.91% | 2026-06-30 |
Essays that examine BILS
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.