PIMCO Sector Fund Series - I
Actively managed U.S. bond fund
As of its 2026 Q2 report, PIMCO Sector Fund Series - I held 1,322 positions with $3.33B in net assets. Its ten largest holdings made up 19.6% of the fund. Over the 12 months to May 2026, it returned 7.3%, with dividends reinvested. In 2026 Q2 it added 301 new positions and exited 272.
PIMCO Sector Fund Series - I is actively managed U.S. bond fund.
What you own
| Company | Weight | Value | Shares |
|---|---|---|---|
United States Treasury 4.13% · due 2044-08-15 | 3.71% | $123.50M | — |
UMBS, TBA 5.00% · due 2056-08-01 | 2.92% | $97.17M | — |
UMBS, TBA 4.00% · due 2056-09-01 | 2.36% | $78.63M | — |
UMBS, TBA 4.50% · due 2056-08-01 | 2.36% | $78.49M | — |
United States Treasury 3.75% · due 2041-08-15 | 1.83% | $61.00M | — |
United States Treasury 4.25% · due 2054-08-15 | 1.54% | $51.44M | — |
United States Treasury 4.38% · due 2036-05-15 | 1.40% | $46.55M | — |
United States Treasury 3.50% · due 2031-02-28 | 1.25% | $41.74M | — |
United States Treasury 4.63% · due 2055-02-15 | 1.17% | $39.07M | — |
United States Treasury 2.13% · due 2029-04-15 | 1.07% | $35.63M | — |
The 200 largest of 1,322 holdings, with the share counts as filed, open with a free account.
What the fund is made of
Percentages are of fund net assets. Rounding, liabilities and short positions can make totals differ from 100%.
| Bonds | 96.76% |
| Securitized | 19.28% |
| Derivatives | 1.17% |
| Loans | 0.53% |
| Cash & short-term | -6.03% |
These positions come to 111.72% of the fund's net assets. This counts only what the fund reported holding — the holdings disclosure covers assets, not liabilities such as borrowings — so it is not expected to reconcile to 100%.
The outer band is exposure held short — written against the portfolio rather than part of it, which is why it sits outside the ring and why the two are never netted into one figure.
Derivatives are shown at market value, not notional exposure.
By sector
- Government
- 19.0%
- Other
- 17.8%
- Securitized
- 16.3%
- International
- 13.5%
- 12 other sectors
- 33.4%
- Government
- 19.0%
- Other
- 17.8%
- Securitized
- 16.3%
- International
- 13.5%
- Financials
- 12.1%
- Utilities
- 7.3%
- Information Technology
- 2.2%
- Consumer Discretionary
- 2.2%
- Industrials
- 1.9%
- Communication Services
- 1.8%
- Energy
- 1.8%
- Health Care
- 1.7%
- Real Estate
- 1.5%
- Consumer Staples
- 0.8%
- Cash
- 0.1%
- Materials
- 0.0%
How it has done
C000227290 share class · total returns with dividends reinvested
Volatility over the last 12 months: 3.87%. Past returns are a record, not a forecast.
Jun 2026 has been filed since the trailing figures were struck, so it is not in the table above or the curve — every figure here shares one cut-off, which is what makes them comparable with other funds.
Fees & fund details
PIMCO Sector Fund Series - I is an actively managed U.S. bond fund.
- Asset class
- Bonds
- Region
- United States
- Management
- Actively managed
- Fund type
- Open-end fund
- Credit quality
- Mixed credit
- Rate sensitivity
- Long duration
- Features
- Fund of funds
This fund files no prospectus profile. Unit investment trusts and closed-end funds register on forms that carry no objective or fee tagging, and some fund families file without it — a gap in what was filed, not a fund without an objective or without fees.
Classified from what the fund holds, not from its name · 2026 Q2. The summary is a paraphrase of the prospectus; the objective is verbatim.
What changed this quarter
Positions that entered or left the fund since its previous filing. Positions that were only resized are not listed.
301 new· the largest 5
272 exited· the largest 1
Debt profile
What this fund holds — value-weighted across its bond and securitized long positions · as of 2026-06-30
Share of the fund's debt by how its coupon behaves — the fact that decides whether a rate move reaches this portfolio at all.
| Fixed rate | 92.2% |
| Floating rate | 7.6% |
| Zero-coupon or unclassified | 0.1% |
Share of the fund's debt value in each maturity band, shortest first.
| <1y | 1.1% |
| 1-3y | 13.2% |
| 3-5y | 17.5% |
| 5-10y | 37.1% |
| 10y+ | 31.2% |
Based on what filers reported; a filer that never reported a flag also reads as none.
Risk profile
Interest-rate and credit-spread sensitivity, both in years · as of 2026Q2
Most of this fund’s sensitivity is to interest rates, with credit spreads carrying nearly as much.
Where the loss would come from. The two shocks are the same size, so this is the balance of the fund's two sensitivities rather than a bet on one moving more.
| Interest rates | 53% |
| Credit spreads | 47% |
Filers report the impact of a 0.01% move only, so the total is our own scaling of that one number and overstates the loss on most bonds — read it as approximate, never as precise. The two sensitivities overlap rather than add up: they measure the same positions against different shocks, which is why the durations above are shown side by side and never summed.
Share of the fund's spread duration carried by each credit tier.
| Investment grade | +4.91 yr |
| High yield | +1.98 yr |
Share of duration at each point, shortest first. This filer signs its rate and credit disclosures differently; the direction shown follows its interest-rate filing, and a negative reading is the least-supported figure here.
| 3 mo | 0.15 yr | 2% |
| 1 yr | 0.95 yr | 12% |
| 5 yr | 2.32 yr | 29% |
| 10 yr | 2.93 yr | 37% |
| 30 yr | 1.52 yr | 19% |
| 3 mo | 0.24 yr | 3% |
| 1 yr | 0.86 yr | 13% |
| 5 yr | 3.42 yr | 50% |
| 10 yr | 1.83 yr | 26% |
| 30 yr | 0.55 yr | 8% |
The two bands measure the same positions against different shocks and do not add — a Treasury carries rate duration and no spread duration, a floating-rate credit the reverse. Rate tenors are also summed across every currency the fund discloses.
Show the numbers
| Tenor | Rate yrs | IG yrs | HY yrs | IG $/bp | HY $/bp |
|---|---|---|---|---|---|
| 3 mo | +0.15 | +0.19 | +0.05 | $63.0k | $15.3k |
| 1 yr | +0.95 | +0.72 | +0.14 | $241.0k | $46.9k |
| 5 yr | +2.32 | +1.74 | +1.68 | $580.2k | $558.3k |
| 10 yr | +2.93 | +1.76 | +0.07 | $585.2k | $23.0k |
| 30 yr | +1.52 | +0.50 | +0.05 | $166.9k | $16.2k |
Dollar change per 1bp of spread movement, as filed and sign-anchored. A blank cell was not filed; a zero was.
Duration contribution in years, summing to the fund's 7.87 yr.
This is where the fund's rate exposure sits, not its currency risk — most international bond funds hedge the currency back to dollars, and the size of those hedges is not in the filing. Tenors are also summed across curves, so a 5-year JPY point and a 5-year USD point are added together.
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