Fund · DoubleLine Mortgage ETF · measured from SEC filings
DMBS holdings
DMBS reports 190 holdings and behaves like 38.8 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 13 quarters of filings.
Measured concentration
as of 2026-06-30Computed 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: 3.64% at a quoted market price (level 1), one issuer country.
What stands out
as of 2026-06-30DMBS's largest investment is Umbs, Single Family, 30 Year at 15.14% of net assets. Umbs, Single Family, 30 Year and JPMorgan U.S. Government Money Market Fund - Class IM follow; the three together are 25.33%. Ten companies are 33.56% of the fund; the other 180 share the rest. Among the 15 mortgage-backed funds measured here, DMBS behaves like 38.8 holdings against a median of 157.5 — 4.0 times more concentrated than the median. Across 13 quarterly filings DMBS has become less concentrated: it behaved like 19.3 at 2023-06-30 and 38.8 at 2026-06-30. Between the 2026-03-31 and 2026-06-30 filings 22 positions were added and 25 dropped; 40.4% of the weight moved.
Each sentence is read from the fund's own SEC filing; the class median is computed across the comparable mortgage-backed funds on this site. Nothing here is a view on the fund.
Every filing since 2023
13Between 2023-06-30 and 2026-06-30, DMBS went from behaving like 19.3 equally weighted positions to 38.8 — 101% more, while its top ten went from 56.03% to 33.56% of net assets. Read across the funds on the concentration-over-time table.
| Period | Holdings | Effective | Top 10 | Largest |
|---|---|---|---|---|
| 2026-06-30 | 190 | 38.8 | 33.56% | 12.12% |
| 2026-03-31 * | 191 | 61.9 | 27.67% | 7.42% |
| 2025-12-31 * | 177 | 69.8 | 25.33% | 6.47% |
| 2025-09-30 * | 164 | 82.5 | 22.77% | 3.19% |
| 2025-06-30 | 142 | 58.9 | 28.38% | 6.29% |
| 2025-03-31 | 128 | 58 | 29% | 5.55% |
| 2024-12-31 | 123 | 56.8 | 29.59% | 6.17% |
| 2024-09-30 | 118 | 49.6 | 30.63% | 8.48% |
Earlier filings (5 more, back to 2023-06-30)
| Period | Holdings | Effective | Top 10 | Largest |
|---|---|---|---|---|
| 2024-06-30 | 106 | 62.5 | 26.9% | 4.61% |
| 2024-03-31 | 103 | 64.7 | 25.63% | 3.32% |
| 2023-12-31 | 84 | 56.3 | 28.32% | 3.9% |
| 2023-09-30 | 47 | 32.4 | 44.44% | 5.6% |
| 2023-06-30 | 37 | 19.3 | 56.03% | 12.2% |
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 2026-06-30The 15 largest of 190 positions in DMBS's Form N-PORT, weight as a share of net assets, securities-lending collateral excluded. Every position, every quarter: DMBS.csv.gz.
| # | Position | Weight | Cumulative |
|---|---|---|---|
| 1 | FNMA or FHLMC | 12.12% | 12.1% |
| 2 | FNMA or FHLMC | 4.60% | 16.7% |
| 3 | JPMorgan U.S. Government Money Market Fund | 3.56% | 20.3% |
| 4 | FNMA | 2.33% | 22.6% |
| 5 | FHLMC Pool | 2.18% | 24.8% |
| 6 | FHLMC Pool | 1.90% | 26.7% |
| 7 | FHLMC Pool | 1.77% | 28.5% |
| 8 | FHLMC Pool | 1.72% | 30.2% |
| 9 | FNMA | 1.72% | 31.9% |
| 10 | FHLMC Pool | 1.65% | 33.6% |
| 11 | FNMA | 1.62% | 35.2% |
| 12 | FNMA | 1.59% | 36.8% |
| 13 | FNMA | 1.54% | 38.3% |
| 14 | FNMA | 1.53% | 39.8% |
| 15 | FHLMC Pool | 1.49% | 41.3% |
Returns the fund reported
2023-04 – 2026-06Monthly total returns from Item B.5 of DMBS's own filings, 39 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: DMBS.json · all funds.
Since the previous filing
2026-03-31 → 2026-06-30190 positions became 187: 22 added (40.3% of the fund at the later date), 25 dropped (33.9% at the earlier date). Half the sum of all weight changes, a turnover proxy: 40.4%. Positions are matched on identifiers, so a security whose identifier changed shows as one drop and one add. Every filing of DMBS compared this way, as a feed: changes.xml · all funds: filings received.
| Largest increases | 2026-03-31 | 2026-06-30 | Largest decreases | 2026-03-31 | 2026-06-30 |
|---|---|---|---|---|---|
| JPMorgan U.S. Government Money Market Fund | 3.45% | 3.56% | FNMA | 1.72% | 1.48% |
| FHLMC Pool | 1.67% | 1.49% | |||
| FHLMC Pool | 1.40% | 1.24% | |||
| FNMA | 1.64% | 1.48% | |||
| FNMA | 1.71% | 1.54% | |||
| N/A | 0.23% | 0.08% |
New: FNMA or FHLMC (12.12%), FNMA or FHLMC (4.60%), FNMA (2.33%), FHLMC Pool (2.18%), FHLMC Pool (1.90%), FHLMC Pool (1.77%). Gone: FNMA or FHLMC (7.42%), FNMA or FHLMC (4.21%), FNMA (2.05%), FNMA (2.01%), FHLMC Pool (1.66%), FNMA or FHLMC (1.60%).
Asset categories and pricing
as of 2026-06-30| Asset category (as filed) | Share of investments |
|---|---|
| mortgage-backed ABS-MBS | 96.36% |
| short-term investment STIV | 3.56% |
| DIR DIR | 0.08% |
3.6% of DMBS is carried at a quoted market price (fair-value level 1). Categories and levels are the filer's, from Form N-PORT; what a low level-1 share does and does not mean is in the measure's page.
Derivative exposure and counterparties
as of 2026-06-30A 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 $705M. Notional of an interest-rate or currency swap is not equity exposure.
Full detail for every fund that files derivatives: leverage.json (CC BY 4.0).
Neighbours by effective holdings, mortgage-backed funds
6Every measured mortgage-backed fund lined up by how many holdings it behaves like; these sit either side of DMBS (38.8). Same filings, same arithmetic. Position in this list says nothing about which fund is better.
| Fund | Reports | Behaves like | Top ten | As of |
|---|---|---|---|---|
| MTBA Simplify MBS ETF | 13 | 3.7 | 99.11% | 2026-06-30 |
| JMBS Janus Henderson Mortgage-Backed Securities ETF | 623 | 44.8 | 35.52% | 2026-07-31 |
| JSI Janus Henderson Securitized Income ETF | 582 | 70.8 | 26.23% | 2026-07-31 |
| BOND PIMCO Active Bond Exchange-Traded Fund | 1,815 | 83.2 * | 28.37% | 2026-06-30 |
| XAGG Eaton Vance Income Opportunities ETF | 857 | 91.7 * | 25.55% | 2026-06-30 |
| FSEC Fidelity Investment Grade Securitized ETF | 1,075 | 94.2 | 27.76% | 2026-05-31 |
Essays that examine DMBS
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.