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Super Investors BlackRock California Municipal Opportunities Fund

BlackRock California Municipal Opportunities Fund

Blackrock California Municipal Series Trust · net assets $2.45B · 367 holdings as of August 31, 2026. Monthly N-PORT disclosure: the full book, not just equities.

Asset mix

DBT: 95.7% · STIV: 2.3% · EC: 1.9% · DE: 0.0%

Financial position

Total assets
$2.53B
Total liabilities
$83.4M
Net assets
$2.45B
Assets attributable to miscellaneous securities
$0
Assets invested in controlled foreign corporations
$0
Borrowings payable within one year
$0
Payable to controlled companies within one year
$0
Payable to other affiliates within one year
$0
Other liabilities payable within one year
$0
Borrowings payable after one year
$0
Payable to controlled companies after one year
$0
Payable to other affiliates after one year
$0
Other liabilities payable after one year
$0
Payables for delayed-delivery investments
$71.1M
Payables for standby commitments
$0
Liquidation preference of outstanding preferred stock
$0
Cash not reported in Parts C or D
$0

Monthly flows and gains

Month 1 Month 2 Month 3
Sales $44.1M $49.9M $48.1M
Reinvestment $6.71M $6.86M $6.94M
Redemptions $36.3M $35.3M $45.5M
Net realized gain (non-derivative) $1.7M $-879K $-573K
Net unrealized appreciation (non-derivative) $22.3M $-50.5M $-12.6M

The three months of the reporting period, as filed; month 3 ends August 31, 2026.

Credit spread risk (change in value per 1bp spread move)

Tenor Investment grade Non-investment grade
3 months $491 $34K
1 year $16.1K $2.58K
5 years $579K $12.8K
10 years $1.21M $76.9K
30 years $245K $218K

Filing details

Registrant
Blackrock California Municipal Series Trust
Registrant CIK
765199
Registrant LEI
5493003C56LLBKW8JY53
Series
BlackRock California Municipal Opportunities Fund
Series ID
S000004030
Series LEI
LQOJZ5EXQ6332KB2NH96
SEC file number
811-04264
Address
100 Bellevue Parkway, Wilmington, US-DE, 19809, US
Phone
800-441-7762
Form
NPORT-P
Filed
October 23, 2026
Report period ends
May 31, 2027
Report month ends
August 31, 2026
Accession number
000141036826108073
Holding Value % of net assets
Blackrock Liquidity Funds STIV $58.1M 2.37%
California Community Choice Financing Authority DBT $53.1M 2.17%
Ishares California Muni Bond ETF EC $48.3M 1.97%
California Community Choice Financing Authority DBT $47.4M 1.94%
California Community Choice Financing Authority DBT $47.4M 1.93%
California State Public Works Board DBT $43.6M 1.78%
California State University DBT $34.1M 1.39%
City Of San Francisco Ca Public Utilities Commission Water Revenue DBT $32.1M 1.31%
California Infrastructure & Economic Development Bank DBT $31.8M 1.30%
California Housing Finance Agency DBT $30M 1.22%
Regents Of The University Of California Medical Center Pooled Revenue DBT $29.2M 1.19%
California Community Choice Financing Authority DBT $29M 1.18%
City Of Los Angeles Department Of Airports DBT $27.6M 1.13%
County Of Sacramento Ca Airport System Revenue DBT $26.7M 1.09%
California Community Choice Financing Authority DBT $26.2M 1.07%
San Diego Unified School District/ca DBT $25.5M 1.04%
San Diego Public Facilities Financing Authority DBT $25.1M 1.03%
City Of Los Angeles Department Of Airports DBT $24.1M 0.98%
Mt San Antonio Community College District DBT $23.9M 0.98%
Coast Community College District DBT $23.5M 0.96%
Commonwealth Of Puerto Rico DBT $22.8M 0.93%
San Jose Unified School District DBT $21.7M 0.89%
California Community Choice Financing Authority DBT $21.5M 0.88%
Fremont Union High School District DBT $21.4M 0.87%
State Of California Department Of Water Resources DBT $21.3M 0.87%
California Health Facilities Financing Authority DBT $21.2M 0.87%
East Bay Municipal Utility District Water System Revenue DBT $21M 0.86%
California Municipal Finance Authority DBT $20.1M 0.82%
San Diego County Regional Airport Authority DBT $19.3M 0.79%
City Of San Francisco Ca Public Utilities Commission Water Revenue DBT $18.9M 0.77%
San Francisco City & County Airport Comm-san Francisco International Airport DBT $16.9M 0.69%
San Diego County Regional Airport Authority DBT $16.9M 0.69%
San Francisco City & County Public Utilities Commission Wastewater Revenue DBT $16.8M 0.68%
State Of California DBT $16.2M 0.66%
California Community Choice Financing Authority DBT $15.9M 0.65%
San Diego Public Facilities Financing Authority DBT $15.8M 0.64%
California Community Choice Financing Authority DBT $15.4M 0.63%
University Of California DBT $15.3M 0.62%
Chabot-las Positas Community College District DBT $15.1M 0.62%
San Diego Unified School District/ca DBT $15.1M 0.62%
Puerto Rico Sales Tax Financing Corp Sales Tax Revenue DBT $14.9M 0.61%
Elk Grove Unified School District DBT $14.7M 0.60%
West Valley-mission Community College District DBT $14.5M 0.59%
San Bernardino Community College District DBT $14.4M 0.59%
Sacramento Municipal Utility District DBT $14.1M 0.58%
San Marcos Unified School District DBT $14M 0.57%
Golden State Tobacco Securitization Corp DBT $13.8M 0.56%
Golden State Tobacco Securitization Corp DBT $13.3M 0.54%
California Housing Finance Agency DBT $13.1M 0.53%
San Francisco Bay Area Rapid Transit District DBT $12.4M 0.51%
Regents Of The University Of California Medical Center Pooled Revenue DBT $12.4M 0.50%
Burbank-glendale-pasadena Airport Authority Brick Campaign DBT $12.2M 0.50%
East Bay Municipal Utility District Water System Revenue DBT $12.1M 0.49%
Folsom Cordova Unified School District DBT $12.1M 0.49%
California Community Choice Financing Authority DBT $12M 0.49%
California Infrastructure & Economic Development Bank DBT $12M 0.49%
San Mateo Foster City School District/ca DBT $12M 0.49%
San Diego Unified School District/ca DBT $11.9M 0.48%
California Health Facilities Financing Authority DBT $11.7M 0.48%
Tamalpais Union High School District DBT $11.6M 0.47%

Showing top 60 of 367 holdings.

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