Fund · JPMorgan BetaBuilders U.S. Mid Cap Equity ETF · measured from SEC filings
BBMC holdings
BBMC reports 463 holdings and behaves like 358.2 equally weighted ones, computed from its SEC Form N-PORT filing for 2026-07-31. The fact sheet publishes the first number; this page computes the second, and traces it across 25 quarters of filings.
Measured concentration
as of 2026-07-31Read this figure with the following in mind
3.4% of net assets is securities-lending cash collateral, excluded from the figure; counted as filed the fund would read 254.6
The figure below is what the filing says, published unchanged. What it may not do is sit beside a plain long-only fund and be read as the same quantity. How comparability is decided.
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: 100% at a quoted market price (level 1), 9 issuer countries.
What stands out
as of 2026-07-31BBMC's largest investment is Sandisk Corp at 3.06% of net assets. Ciena Corp and Lumentum Holdings Inc follow; the three together are 5.83%. Ten companies are 6.66% of the fund; the other 453 share the rest. Among the 721 equity funds measured here, BBMC behaves like 358.2 holdings against a median of 42.4 — 8.4 times the median. Across 25 quarterly filings BBMC has become more concentrated: it behaved like 359.2 at 2020-04-30 and 272.2 at 2026-04-30. Between the 2026-01-31 and 2026-04-30 filings 0 positions were added and 8 dropped; 9.5% of the weight moved.
Each sentence is read from the fund's own SEC filing; the class median is computed across the comparable equity funds on this site. Nothing here is a view on the fund.
Every filing since 2020
25Between 2020-04-30 and 2026-04-30, BBMC went from behaving like 359.2 equally weighted positions to 272.2 — 24% fewer, while its top ten went from 6.38% to 10.95% of net assets. Read across the funds on the concentration-over-time table.
| Period | Holdings | Effective | Top 10 | Largest |
|---|---|---|---|---|
| 2026-04-30 | 558 | 272.2 | 10.95% | 3.06% |
| 2026-01-31 | 566 | 387.2 | 7.27% | 1.41% |
| 2025-10-31 | 554 | 374.6 | 7.22% | 0.94% |
| 2025-07-31 | 560 | 412.6 | 6.14% | 0.71% |
| 2025-04-30 | 574 | 406.7 | 6.23% | 1.25% |
| 2025-01-31 | 582 | 430.9 | 5.94% | 0.94% |
| 2024-10-31 | 594 | 422.8 | 6.09% | 1.13% |
| 2024-07-31 | 599 | 464.1 | 5.01% | 0.66% |
Earlier filings (17 more, back to 2020-04-30)
| Period | Holdings | Effective | Top 10 | Largest |
|---|---|---|---|---|
| 2024-04-30 | 594 | 410.8 | 6.99% | 1.25% |
| 2024-01-31 | 598 | 456.4 | 5.58% | 0.76% |
| 2023-10-31 | 589 | 437.7 | 5.87% | 1.04% |
| 2023-07-31 | 598 | 456.1 | 5.51% | 1.13% |
| 2023-04-30 | 640 | 457.8 | 5.41% | 0.89% |
| 2023-01-31 | 645 | 487.4 | 4.65% | 0.63% |
| 2022-10-31 | 627 | 456 | 5.19% | 0.72% |
| 2022-07-31 | 634 | 437.9 | 5.64% | 1.59% |
| 2022-04-30 | 636 | 452.7 | 5.05% | 0.66% |
| 2022-01-31 | 642 | 476.6 | 4.47% | 0.5% |
| 2021-10-31 | 594 | 371.4 | 7.47% | 1.07% |
| 2021-07-31 | 599 | 400.2 | 6.4% | 0.76% |
| 2021-04-30 | 550 | 379.7 | 6.37% | 0.74% |
| 2021-01-31 | 553 | 370.6 | 6.97% | 1.01% |
| 2020-10-31 | 531 | 321.9 | 8.39% | 1.23% |
| 2020-07-31 | 535 | 347.9 | 7.65% | 0.96% |
| 2020-04-30 | 515 | 359.2 | 6.38% | 0.76% |
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.
As filed, collateral included
3.38% collateralBBMC's filing lists 464 positions including 3.38% of net assets in securities-lending cash collateral. Counted as filed the fund reads 254.6 effective holdings with a top ten of 9.48%; on its own investments — the figure above — it reads 358.2 with a top ten of 6.66%. The collateral is matched by a liability and is not a holding the fund chose; since 2026-09-18 every figure on this site sets it aside (methodology). Both numbers are in the data.
Largest positions, as filed
as of 2026-04-30The 15 largest of 463 positions in BBMC's Form N-PORT, weight as a share of net assets, securities-lending collateral excluded. Every position, every quarter: BBMC.csv.gz.
| # | Position | Weight | Cumulative |
|---|---|---|---|
| 1 | Sandisk Corp. | 3.06% | 3.1% |
| 2 | Ciena Corp. | 1.49% | 4.5% |
| 3 | Lumentum Holdings, Inc. | 1.28% | 5.8% |
| 4 | Coherent Corp. | 1.13% | 7.0% |
| 5 | JPMorgan U.S. Government Money Market Fund | 0.96% | 7.9% |
| 6 | Jabil, Inc. | 0.67% | 8.6% |
| 7 | Tapestry, Inc. | 0.60% | 9.2% |
| 8 | Casey's General Stores, Inc. | 0.60% | 9.8% |
| 9 | Qnity Electronics, Inc. | 0.59% | 10.4% |
| 10 | TechnipFMC plc | 0.58% | 11.0% |
| 11 | Natera, Inc. | 0.56% | 11.5% |
| 12 | Revolution Medicines, Inc. | 0.54% | 12.0% |
| 13 | Curtiss-Wright Corp. | 0.53% | 12.6% |
| 14 | XPO, Inc. | 0.52% | 13.1% |
| 15 | Fabrinet | 0.50% | 13.6% |
By country of issuer
as of 2026-04-30Share of BBMC'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 | 94.73% |
| Bermuda° | 1.86% |
| Ireland° | 0.97% |
| United Kingdom | 0.82% |
| Cayman Islands° | 0.50% |
| Switzerland | 0.44% |
| Netherlands° | 0.27% |
| Puerto Rico° | 0.19% |
Returns the fund reported
2020-02 – 2026-04Monthly total returns from Item B.5 of BBMC's own filings, 75 months on record. Not computed here and not from a price feed.
Cross-checked against a series computed separately from prices: median difference 0.10 percentage points over 72 months, which is roughly the distributions. Every month with the filing it came from: BBMC.json · all funds.
Who borrows BBMC's shares
2026-07-31The fund lends its holdings, and Item B.4.a of the filing names every firm holding them. At 2026-07-31, $67m was out to 14 borrowers. The largest, BNP PARIBAS PRIME BROKERAGE INTERNATIONAL LIMITED, held 31.9% of it.
| Borrower | On loan | Share of the loan |
|---|---|---|
| BNP PARIBAS PRIME BROKERAGE INTERNATIONAL LIMITED | $21m | 31.9% |
| National Financial Services LLC | $13m | 19.1% |
| GOLDMAN SACHS & CO. | $10m | 15.4% |
| BARCLAYS BANK PLC | $9m | 12.8% |
| MORGAN STANLEY & CO LLC | $3m | 4.4% |
The filing reports no cash collateral position against this loan. Collateral taken in a form the fund does not hold as a position does not appear in N-PORT, so this is silence rather than absence. What the collateral figure can and cannot show. Every quarter BBMC has filed, with each borrower: BBMC.json · all funds.
Since the previous filing
2026-01-31 → 2026-04-30566 positions became 558: 0 added (0.0% of the fund at the later date), 8 dropped (1.6% at the earlier date). Half the sum of all weight changes, a turnover proxy: 9.5%. Positions are matched on identifiers, so a security whose identifier changed shows as one drop and one add. Every filing of BBMC compared this way, as a feed: changes.xml · all funds: filings received.
| Largest increases | 2026-01-31 | 2026-04-30 | Largest decreases | 2026-01-31 | 2026-04-30 |
|---|---|---|---|---|---|
| Sandisk Corp. | 1.41% | 3.06% | AST SpaceMobile, Inc. | 0.56% | 0.35% |
| Ciena Corp. | 0.75% | 1.49% | Kratos Defense & Security Solutions, Inc. | 0.36% | 0.23% |
| Lumentum Holdings, Inc. | 0.57% | 1.28% | EPAM Systems, Inc. | 0.24% | 0.13% |
| Coherent Corp. | 0.69% | 1.13% | Reddit, Inc. | 0.48% | 0.37% |
| Revolution Medicines, Inc. | 0.31% | 0.54% | Williams-Sonoma, Inc. | 0.53% | 0.43% |
| Jabil, Inc. | 0.50% | 0.67% | Builders FirstSource, Inc. | 0.27% | 0.18% |
Gone: Exact Sciences Corp. (0.40%), Comerica, Inc. (0.24%), Dayforce, Inc. (0.23%), Confluent, Inc. (0.18%), Avidity Biosciences, Inc. (0.18%), Cadence Bank (0.16%).
Asset categories and pricing
as of 2026-07-3195.89% equity, 4.11% short-term investment as filed; 100.0% 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 2026-04-30A 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 $2.03B. 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, equity funds
10Every measured equity fund lined up by how many holdings it behaves like; these sit either side of BBMC (358.2). Same filings, same arithmetic. Position in this list says nothing about which fund is better.
| Fund | Reports | Behaves like | Top ten | As of |
|---|---|---|---|---|
| BKMC BNY Mellon US Mid Cap Core Equity ETF | 403 | 325.1 | 6.4% | 2026-07-31 |
| EZM WisdomTree U.S. MidCap Fund | 507 | 330.3 | 7.77% | 2026-06-30 |
| ESML iShares ESG Aware MSCI USA Small-Cap ETF | 899 | 349.4 | 7.64% | 2026-05-31 |
| DFSV Dimensional US Small Cap Value ETF | 995 | 354.9 | 6.89% | 2026-07-31 |
| IJR iShares Core S&P Small-Cap ETF | 655 | 356.1 | 7.46% | 2026-06-30 |
| DFSI Dimensional International Sustainability Core 1 ETF | 2,809 | 361.8 | 9.77% | 2026-07-31 |
| FSMD Fidelity Small-Mid Multifactor ETF | 588 | 371.9 | 8.16% | 2026-07-31 |
| JHSC John Hancock Multifactor Small Cap ETF | 490 | 377.9 | 5.38% | 2026-06-30 |
| DFAI Dimensional International Core Equity Market ETF | 3,781 | 389.8 | 9.29% | 2026-07-31 |
| AVDV Avantis International Small Cap Value ETF | 1,758 | 392.8 | 8.14% | 2026-05-31 |
Essays that examine BBMC
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.