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Fund · JPMorgan Mortgage-Backed Securities ETF · measured from SEC filings

JMTG holdings

JMTG reports 2,556 holdings and behaves like 295.6 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 4 quarters of filings.

Measured concentration

as of 2026-05-31
2,556 Positions reported
295.6 Effective holdings
8.6× Concentration multiple
11.54% Top ten weight

Computed 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: 3.85% at a quoted market price (level 1), 5 issuer countries, 23.08% restricted securities.

What stands out

as of 2026-05-31

The largest line in JMTG's filing is not a stock but JPMorgan Prime Money Market Fund, Class IM, a short-term position at 3.95% of net assets. Ten companies are 11.54% of the fund; the other 2,546 share the rest. Among the 15 mortgage-backed funds measured here, JMTG behaves like 295.6 holdings against a median of 157.5 — 1.9 times the median. Across 4 quarterly filings JMTG has become more concentrated: it behaved like 379.2 at 2025-08-31 and 295.6 at 2026-05-31. Between the 2026-02-28 and 2026-05-31 filings 93 positions were added and 35 dropped; 13.7% 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 2025

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Between 2025-08-31 and 2026-05-31, JMTG went from behaving like 379.2 equally weighted positions to 295.6 — 22% fewer, while its top ten went from 9.23% to 11.54% of net assets. Read across the funds on the concentration-over-time table.

PeriodHoldingsEffective Top 10Largest
2026-05-31 2,556 295.6 11.54% 3.82%
2026-02-28 2,496 409.2 9.02% 2.9%
2025-11-30 2,467 327 9.9% 3.83%
2025-08-31 2,433 379.2 9.23% 3.21%

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 2026-05-31

The 15 largest of 2,556 positions in JMTG's Form N-PORT, weight as a share of net assets, securities-lending collateral excluded. Every position, every quarter: JMTG.csv.gz.

#PositionWeightCumulative
1JPMorgan Prime Money Market Fund3.82%3.8%
2FNMA/FHLMC2.10%5.9%
3FNMA/FHLMC1.24%7.2%
4United States of America1.15%8.3%
5FNMA0.63%8.9%
6FNMA0.57%9.5%
7United States of America0.55%10.1%
8FNMA0.51%10.6%
9FNMA0.49%11.1%
10United States of America0.47%11.5%
11GNMA0.46%12.0%
12FNMA0.43%12.4%
13CFIN 2022-RTL1 Issuer LLC0.35%12.8%
14FNMA0.31%13.1%
15FNMA0.31%13.4%

By country of issuer

as of 2026-05-31

Share of JMTG's own investments by the issuer country the filer reported (incorporation, not revenue). Each country links to every fund that holds it.

CountryShare
United States 99.22%
Jersey° 0.31%
Cayman Islands° 0.23%
United Kingdom 0.16%
Spain 0.08%

Returns the fund reported

2025-06 – 2026-05

Monthly total returns from Item B.5 of JMTG's own filings, 12 months on record. Not computed here and not from a price feed.

6.3%Last twelve months filed
6%Whole series, compounded
1.8%Best month
-1.6%Worst month

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: JMTG.json · all funds.

Since the previous filing

2026-02-28 → 2026-05-31

2,478 positions became 2,536: 93 added (12.4% of the fund at the later date), 35 dropped (3.8% at the earlier date). Half the sum of all weight changes, a turnover proxy: 13.7%. Positions are matched on identifiers, so a security whose identifier changed shows as one drop and one add. Every filing of JMTG compared this way, as a feed: changes.xml · all funds: filings received.

Largest increases2026-02-282026-05-31Largest decreases2026-02-282026-05-31
JPMorgan Prime Money Market Fund2.90%3.82% United States of America1.30%1.15%
Triad Holdings III LLC0.19%0.24% FNMA0.72%0.63%
Brean Asset-Backed Securities Trust0.08%0.12% FNMA0.38%0.31%
Toorak Mortgage Trust0.02%0.07% United States of America0.62%0.55%
Towd Point Mortgage Trust0.16%0.21% GNMA0.52%0.46%
Center Street Lending Resi-Investor ABS Mortgage Trust0.10%0.14% FNMA0.55%0.49%

New: FNMA/FHLMC (2.10%), FNMA/FHLMC (1.24%), FNMA (0.57%), United States of America (0.47%), FNMA (0.43%), GNMA (0.29%). Gone: FNMA/FHLMC (1.15%), FNMA (0.29%), FNMA (0.25%), FNMA (0.24%), FNMA (0.23%), AMSR Trust (0.19%).

Asset categories and pricing

as of 2026-05-31
Asset category (as filed)Share of investments
mortgage-backed ABS-MBS80.33%
ABS-O ABS-O12.08%
short-term investment STIV3.82%
debt DBT3.61%
CDO/CLO ABS-CBDO0.13%
DIR DIR0.03%

3.9% of JMTG is carried at a quoted market price (fair-value level 1); 7.7% at level 3, priced from the filer's own inputs. 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 2026-05-31

A 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 $6.92B. Notional of an interest-rate or currency swap is not equity exposure.

0%Stocks held directly
0%Swap notional (0)
3.07%Futures notional (4)
3.1%Sum, % of net assets

Full detail for every fund that files derivatives: leverage.json (CC BY 4.0).

Neighbours by effective holdings, mortgage-backed funds

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Every measured mortgage-backed fund lined up by how many holdings it behaves like; these sit either side of JMTG (295.6). Same filings, same arithmetic. Position in this list says nothing about which fund is better.

FundReportsBehaves likeTop tenAs of
CRUX Columbia Core Bond ETF 477 115.9 18.12% 2026-06-30
HTRB Hartford Total Return Bond ETF 1,766 139.7 21.98% 2026-07-31
SPMB State Street(R) SPDR(R) Portfolio Mortgage Backed Bond ETF 2,701 157.5 12.96% 2026-06-30
EVMO Eaton Vance Mortgage Opportunities ETF 717 173.4 13.88% 2026-06-30
MBB iShares MBS ETF 11,146 187.7 12.45% 2026-05-31
CARY Angel Oak Income ETF 794 296.5 11.07% 2026-07-31
JPIE JPMorgan Income ETF 2,539 306.4 12.99% 2026-05-31
VMBS Vanguard Mortgage-Backed Securities Index Fund 5,113 326.7 7.69% 2026-05-31
SMBS Schwab Mortgage-Backed Securities ETF 4,197 984.5 4.35% 2026-05-31

Essays that examine JMTG

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