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MF · holdings as filed 2026-06-30

What's inside BBTBX?

Bridge Builder Core Bond Fund
Holdings
5,398
positions in the fund
Top 10
12%
of fund assets
Expense ratio
0.12%
net, per year
Fund size
$28B
total net assets

Top 20 holdings

RankLogoTicker / NameWeight
1
?
—F/C US 2YR NOTE (CBT) SEP26
3.14%
2
F
FRGXXFIDELITY INV MMKT GOVT-INST
2.64%
3
?
—F/C US 5YR NOTE (CBT) SEP26
1.46%
4
?
—F/C US ULTRA BOND CBT SEP26
0.78%
5
BOND
US Treasury Note3.375% · May 2033
0.78%
6
BOND
US Treasury Note4.25% · Feb 2054
0.69%
7
BOND
US Treasury Note4% · Jun 2032
0.65%
8
BOND
US Treasury Note3.5% · Mar 2029
0.65%
9
BOND
US Treasury Note4.625% · Apr 2029
0.57%
10
BOND
US Treasury Note4.5% · Nov 2033
0.51%
11
BOND
US Treasury Note3.5% · Feb 2033
0.49%
12
BOND
US Treasury Note1.125% · Aug 2040
0.47%
13
BOND
US Treasury Note4.125% · Jun 2028
0.45%
14
?
—F/C US LONG BOND(CBT) SEP26
0.45%
15
BOND
US Treasury Note4.25% · Nov 2034
0.44%
16
BOND
US Treasury Note4.625% · Nov 2045
0.43%
17
BOND
US Treasury Note4.125% · Aug 2044
0.43%
18
BOND
US Treasury Note3.375% · Aug 2042
0.41%
19
BOND
US Treasury Note4.25% · Mar 2033
0.39%
20
BOND
US Treasury Note4.375% · Jan 2032
0.38%
Sectors tap a row to see its top 10 holdings
Top holdings — Bonds & Fixed Income
Your 10 largest positions in this sector
1
BOND
US Treasury Note3.375% · May 2033
0.78%
2
BOND
US Treasury Note4.25% · Feb 2054
0.69%
3
BOND
US Treasury Note4% · Jun 2032
0.65%
4
BOND
US Treasury Note3.5% · Mar 2029
0.65%
5
BOND
US Treasury Note4.625% · Apr 2029
0.57%
6
BOND
US Treasury Note4.5% · Nov 2033
0.51%
7
BOND
US Treasury Note3.5% · Feb 2033
0.49%
8
BOND
US Treasury Note1.125% · Aug 2040
0.47%
9
BOND
US Treasury Note4.125% · Jun 2028
0.45%
10
BOND
US Treasury Note4.25% · Nov 2034
0.44%
Geography tap a row to see its top 10 holdings
Top holdings — United States
Your 10 largest positions in this country
1
F
FRGXXFIDELITY INV MMKT GOVT-INST
2.64%
2
BOND
US Treasury Note3.375% · May 2033
0.78%
3
BOND
US Treasury Note4.25% · Feb 2054
0.69%
4
BOND
US Treasury Note4% · Jun 2032
0.65%
5
BOND
US Treasury Note3.5% · Mar 2029
0.65%
6
BOND
US Treasury Note4.625% · Apr 2029
0.57%
7
BOND
US Treasury Note4.5% · Nov 2033
0.51%
8
BOND
US Treasury Note3.5% · Feb 2033
0.49%
9
BOND
US Treasury Note1.125% · Aug 2040
0.47%
10
BOND
US Treasury Note4.125% · Jun 2028
0.45%
Geography reflects each issuer's registered business address per SEC EDGAR filings where available, falling back to the exchange or listing where no SEC filing exists — not necessarily where a company's stock is primarily listed (e.g. TSMC is classified as Taiwan even though its ADR trades on the NYSE).
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Data source: official SEC Form N-PORT filings (as of 2026-06-30); expense ratio from SEC prospectus (risk/return) filings. Fund holdings are disclosed quarterly and may reflect a 60-day reporting delay.
Informational and educational only — not investment advice.