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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 2026-06-30

Read 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.

29 Positions reported
23.8 Effective holdings
1.2× Concentration multiple
51.34% Top ten weight

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 2026-06-30

BILS'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

24

Between 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.

PeriodHoldingsEffective Top 10Largest
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)
PeriodHoldingsEffectiveTop 10Largest
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% collateral

BILS'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 2026-06-30

The 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.

#PositionWeightCumulative
1United States Treasury6.87%6.9%
2United States Treasury6.70%13.6%
3United States Treasury6.43%20.0%
4United States Treasury5.34%25.3%
5United States Treasury4.47%29.8%
6United States Treasury4.47%34.3%
7United States Treasury4.40%38.7%
8United States Treasury4.29%43.0%
9United States Treasury4.21%47.2%
10United States Treasury4.17%51.3%
11United States Treasury4.16%55.5%
12United States Treasury4.16%59.7%
13United States Treasury3.80%63.5%
14United States Treasury3.69%67.2%
15United States Treasury2.82%70.0%

Returns the fund reported

2020-09 – 2026-06

Monthly total returns from Item B.5 of BILS's own filings, 70 months on record. Not computed here and not from a price feed.

3.8%Last twelve months filed
18%Whole series, compounded
0.5%Best month
-0.1%Worst month

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

2026-06-30

The 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.

BorrowerOn loanShare 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 → 2026-06-30

29 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 increases2026-03-312026-06-30Largest decreases2026-03-312026-06-30
United States Treasury2.67%6.87% United States Treasury2.74%2.51%
United States Treasury2.66%6.70%
United States Treasury2.63%6.43%
United States Treasury2.78%5.34%
United States Treasury2.43%4.40%
United States Treasury2.44%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 2026-06-30

100.00% 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

9

Every 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.

FundReportsBehaves likeTop tenAs 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

0

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