Fund · American Century Diversified Municipal Bond ETF · measured from SEC filings
TAXF holdings
TAXF reports 755 holdings and behaves like 429.2 equally weighted ones, computed from its SEC Form N-PORT filing for 2026-05-31. The fact sheet publishes the first number; this page computes the second, and traces it across 27 quarters of filings.
Measured concentration
as of 2026-05-31Computed 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: 1.6% at a quoted market price (level 1), 4 issuer countries.
What stands out
as of 2026-05-31The largest line in TAXF's filing is not a stock but BlackRock Liquidity Funds MuniCash, a equity position at 1.6% of net assets. Ten companies are 7.49% of the fund; the other 745 share the rest. Among the 192 bond funds measured here, TAXF behaves like 429.2 holdings against a median of 236.4 — 1.8 times the median. Across 27 quarterly filings TAXF has become less concentrated: it behaved like 74 at 2019-11-30 and 429.2 at 2026-05-31. Between the 2026-02-28 and 2026-05-31 filings 63 positions were added and 22 dropped; 16.3% of the weight moved.
Each sentence is read from the fund's own SEC filing; the class median is computed across the comparable bond funds on this site. Nothing here is a view on the fund.
Every filing since 2019
27Between 2019-11-30 and 2026-05-31, TAXF went from behaving like 74 equally weighted positions to 429.2 — 480% more, while its top ten went from 23.53% to 7.49% of net assets. Read across the funds on the concentration-over-time table.
| Period | Holdings | Effective | Top 10 | Largest |
|---|---|---|---|---|
| 2026-05-31 | 755 | 429.2 | 7.49% | 1.6% |
| 2026-02-28 | 713 | 454 | 6.32% | 1.07% |
| 2025-11-30 | 688 | 419.3 | 6.78% | 1.65% |
| 2025-08-31 | 674 | 437.1 | 6.03% | 1.36% |
| 2025-05-31 | 699 | 450.5 | 6.04% | 1.36% |
| 2025-02-28 | 732 | 508.5 | 4.83% | 0.76% |
| 2024-11-30 | 724 | 498.3 | 5.07% | 0.97% |
| 2024-08-31 | 688 | 493.7 | 4.64% | 0.56% |
Earlier filings (19 more, back to 2019-11-30)
| Period | Holdings | Effective | Top 10 | Largest |
|---|---|---|---|---|
| 2024-05-31 | 639 | 459.8 | 4.94% | 0.6% |
| 2024-02-29 | 601 | 438.8 | 4.98% | 0.55% |
| 2023-11-30 | 554 | 402.2 | 5.1% | 0.61% |
| 2023-08-31 | 524 | 280.1 | 7.99% | 3.29% |
| 2023-05-31 | 460 | 310.9 | 6.83% | 1.2% |
| 2023-02-28 | 439 | 274.2 | 8.67% | 1.77% |
| 2022-11-30 | 476 | 323.3 | 6.68% | 0.9% |
| 2022-08-31 | 486 | 281.7 | 8.42% | 2.61% |
| 2022-05-31 | 451 | 265.9 | 9.03% | 2.43% |
| 2022-02-28 | 445 | 151.3 | 12.57% | 6% |
| 2021-11-30 | 402 | 240.3 | 9.58% | 1.78% |
| 2021-08-31 | 362 | 147.2 | 13.71% | 5.33% |
| 2021-05-31 | 321 | 206.5 | 10.73% | 2.15% |
| 2021-02-28 | 265 | 178.7 | 11.78% | 2.07% |
| 2020-11-30 | 213 | 154.1 | 11.97% | 1.39% |
| 2020-08-31 | 200 | 131.1 | 14.34% | 3.37% |
| 2020-05-31 | 181 | 130.2 | 14.02% | 1.64% |
| 2020-02-29 | 138 | 100.5 | 16.8% | 2.12% |
| 2019-11-30 | 108 | 74 | 23.53% | 3.3% |
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.
Largest positions, as filed
as of 2026-05-31The 15 largest of 755 positions in TAXF's Form N-PORT, weight as a share of net assets, securities-lending collateral excluded. Every position, every quarter: TAXF.csv.gz.
| # | Position | Weight | Cumulative |
|---|---|---|---|
| 1 | BlackRock Liquidity Funds MuniCash | 1.60% | 1.6% |
| 2 | Public Finance Authority | 0.93% | 2.5% |
| 3 | RIVERSPRING HLTH SENIOR | 0.90% | 3.4% |
| 4 | United States Steel Corp | 0.76% | 4.2% |
| 5 | New Jersey Higher Education Student Assistance Authority | 0.61% | 4.8% |
| 6 | Puerto Rico Sales Tax Financing Corp Sales Tax Revenue | 0.60% | 5.4% |
| 7 | ILLINOIS STATE TOLL AUTHO RITY | 0.58% | 6.0% |
| 8 | Southeast Alabama Gas Supply District/The | 0.56% | 6.5% |
| 9 | CHF - WILMINGTON LLC | 0.48% | 7.0% |
| 10 | Orlando Utilities Commission | 0.47% | 7.5% |
| 11 | Energy Southeast A Cooperative District | 0.43% | 7.9% |
| 12 | Patriots Energy Group Financing Agency | 0.41% | 8.3% |
| 13 | New York City Municipal Water Finance Authority | 0.41% | 8.7% |
| 14 | Southeast Energy Authority A Cooperative District | 0.40% | 9.2% |
| 15 | State of Illinois | 0.40% | 9.6% |
By country of issuer
as of 2026-05-31Share of TAXF's own investments by the issuer country the filer reported (incorporation, not revenue). Each country links to every fund that holds it.
| Country | Share |
|---|---|
| United States | 98.33% |
| Puerto Rico° | 1.04% |
| Guam | 0.32% |
| United Kingdom | 0.31% |
Returns the fund reported
2019-09 – 2026-05Monthly total returns from Item B.5 of TAXF's own filings, 81 months on record. Not computed here and not from a price feed.
Cross-checked against a series computed separately from prices: median difference — percentage points over 0 months, which is roughly the distributions. Every month with the filing it came from: TAXF.json · all funds.
Since the previous filing
2026-02-28 → 2026-05-31713 positions became 754: 63 added (13.4% of the fund at the later date), 22 dropped (2.4% at the earlier date). Half the sum of all weight changes, a turnover proxy: 16.3%. Positions are matched on identifiers, so a security whose identifier changed shows as one drop and one add. Every filing of TAXF compared this way, as a feed: changes.xml · all funds: filings received.
| Largest increases | 2026-02-28 | 2026-05-31 | Largest decreases | 2026-02-28 | 2026-05-31 |
|---|---|---|---|---|---|
| BlackRock Liquidity Funds MuniCash | 0.17% | 1.60% | RIVERSPRING HLTH SENIOR | 1.05% | 0.90% |
| Patriots Energy Group Financing Agency | 0.14% | 0.41% | Public Finance Authority | 1.07% | 0.93% |
| City of Chicago IL Wastewater Transmission Revenue | 0.14% | 0.34% | Southeast Alabama Gas Supply District/The | 0.66% | 0.56% |
| North Texas Tollway Authority | 0.07% | 0.21% | Energy Southeast A Cooperative District | 0.51% | 0.43% |
| Chicago Board of Education | 0.18% | 0.32% | Orlando Utilities Commission | 0.55% | 0.47% |
| ILLINOIS STATE TOLL AUTHO RITY | 0.07% | 0.19% | Black Belt Energy Gas District | 0.48% | 0.40% |
New: United States Steel Corp (0.76%), New Jersey Higher Education Student Assistance Authority (0.61%), Puerto Rico Sales Tax Financing Corp Sales Tax Revenue (0.60%), CHF - WILMINGTON LLC (0.48%), New York City Municipal Water Finance Authority (0.41%), State of Illinois (0.40%). Gone: Port of Los Angeles (0.25%), City of Detroit MI (0.23%), BANNER HEALTH OBLIG GROUP (0.17%), Greater Orlando Aviation Authority (0.17%), State of Minnesota (0.16%), WAKE PREPARATORY ACADEMY (0.15%).
Asset categories and pricing
as of 2026-05-3198.40% debt, 1.60% equity as filed; 1.6% 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.
Derivative exposure and counterparties
as of 2026-05-31A position count cannot describe a fund that uses derivatives, because a swap is filed at its unrealised gain, not its exposure. These are the notionals the fund itself reported, against net assets of $659M. Notional of an interest-rate or currency swap is not equity exposure.
1 option positions filed, 0 of them written. The book as filed:
| Type | Side | Strike | Expiry | Underlying |
|---|---|---|---|---|
| Call | Purchased | 5 | 2035-11-26 | as filed, not named |
Full detail for every fund that files derivatives: leverage.json (CC BY 4.0).
Neighbours by effective holdings, debt funds
10Every measured debt fund lined up by how many holdings it behaves like; these sit either side of TAXF (429.2). Same filings, same arithmetic. Position in this list says nothing about which fund is better.
| Fund | Reports | Behaves like | Top ten | As of |
|---|---|---|---|---|
| BAB Invesco Taxable Municipal Bond ETF | 1,867 | 411.6 | 8.74% | 2026-05-31 |
| MMIT NYLIM MacKay Muni Intermediate ETF | 855 | 412.4 | 8.41% | 2026-07-31 |
| CGMS Capital Group U.S. Multi-Sector Income ETF | 1,493 | 422.4 | 6.76% | 2026-06-30 |
| BKAG BNY Mellon Core Bond ETF | 5,130 | 427.3 | 7.38% | 2026-07-31 |
| IBDS iShares iBonds Dec 2027 Term Corporate ETF | 660 | 427.5 | 7.11% | 2026-07-31 |
| TAFI AB Tax-Aware Short Duration Municipal ETF | 689 | 432.2 | 7.16% | 2026-05-31 |
| VPLS Vanguard Core-Plus Bond ETF | 2,903 | 446.1 * | 9.8% | 2026-06-30 |
| HYMB State Street(R) SPDR Nuveen ICE High Yield Municipal Bond ETF | 1,870 | 456.2 | 9.2% | 2026-06-30 |
| SPSB State Street(R) SPDR(R) Portfolio Short Term Corporate Bond ETF | 1,601 | 463.5 | 6.92% | 2026-06-30 |
| EUSB iShares ESG Advanced Universal USD Bond ETF | 4,233 | 479.3 | 6.99% | 2026-05-31 |
Essays that examine TAXF
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.