Fund · Vanguard S&P Mid-Cap 400 Index Fund · measured from SEC filings
IVOO holdings
IVOO reports 403 holdings and behaves like 276.9 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: 100% at a quoted market price (level 1), one issuer country.
What stands out
as of 2026-05-31IVOO's largest investment is Flex Ltd at 1.58% of net assets. Twilio Inc - A and Technipfmc PLC follow; the three together are 3.19%. Ten companies are 8.32% of the fund; the other 393 share the rest. Among the 721 equity funds measured here, IVOO behaves like 276.9 holdings against a median of 42.4 — 6.5 times the median. Across 27 quarterly filings IVOO has held roughly steady since 2019-11-30 (310.5 then, 276.9 now). Between the 2026-02-28 and 2026-05-31 filings 8 positions were added and 9 dropped; 10.5% 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 2019
27Between 2019-11-30 and 2026-05-31, IVOO went from behaving like 310.5 equally weighted positions to 276.9 — 11% fewer, while its top ten went from 6.51% to 8.32% of net assets. Read across the funds on the concentration-over-time table.
| Period | Holdings | Effective | Top 10 | Largest |
|---|---|---|---|---|
| 2026-05-31 | 403 | 276.9 | 8.32% | 1.58% |
| 2026-02-28 | 405 | 282.4 | 8.3% | 1.44% |
| 2025-11-30 | 404 | 293.6 | 7.74% | 1.08% |
| 2025-08-31 | 403 | 307.3 | 6.84% | 0.91% |
| 2025-05-31 | 404 | 307.2 | 6.69% | 0.81% |
| 2025-02-28 | 402 | 314.5 | 6.56% | 0.84% |
| 2024-11-30 | 404 | 313.4 | 6.6% | 0.76% |
| 2024-08-31 | 404 | 316.1 | 6.35% | 0.74% |
Earlier filings (19 more, back to 2019-11-30)
| Period | Holdings | Effective | Top 10 | Largest |
|---|---|---|---|---|
| 2024-05-31 | 402 | 318.5 | 6.54% | 0.76% |
| 2024-02-29 | 403 | 302.4 | 7.37% | 1.52% |
| 2023-11-30 | 405 | 324.1 | 6.35% | 0.74% |
| 2023-08-31 | 405 | 325.1 | 6.4% | 0.8% |
| 2023-05-31 | 404 | 324.3 | 6.25% | 0.83% |
| 2023-02-28 | 403 | 327.3 | 6.26% | 0.77% |
| 2022-11-30 | 405 | 324.7 | 6.49% | 0.82% |
| 2022-08-31 | 405 | 323 | 6.35% | 0.75% |
| 2022-05-31 | 402 | 329.6 | 6.19% | 0.77% |
| 2022-02-28 | 405 | 327.4 | 6.13% | 0.77% |
| 2021-11-30 | 402 | 315.8 | 6.71% | 0.77% |
| 2021-08-31 | 404 | 320.9 | 6.18% | 0.66% |
| 2021-05-31 | 402 | 327.3 | 5.93% | 0.68% |
| 2021-02-28 | 401 | 311.1 | 7.11% | 0.95% |
| 2020-11-30 | 403 | 301.9 | 7.19% | 0.89% |
| 2020-08-31 | 402 | 290.2 | 7.63% | 0.88% |
| 2020-05-31 | 404 | 289 | 7.7% | 0.94% |
| 2020-02-29 | 403 | 306 | 6.87% | 0.85% |
| 2019-11-30 | 403 | 310.5 | 6.51% | 0.75% |
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 403 positions in IVOO's Form N-PORT, weight as a share of net assets, securities-lending collateral excluded. Every position, every quarter: IVOO.csv.gz.
| # | Position | Weight | Cumulative |
|---|---|---|---|
| 1 | Flex Ltd | 1.58% | 1.6% |
| 2 | Twilio Inc | 0.82% | 2.4% |
| 3 | TechnipFMC PLC | 0.79% | 3.2% |
| 4 | Curtiss-Wright Corp | 0.79% | 4.0% |
| 5 | nVent Electric PLC | 0.77% | 4.7% |
| 6 | Sterling Infrastructure Inc | 0.75% | 5.5% |
| 7 | XPO Inc | 0.72% | 6.2% |
| 8 | Everpure Inc | 0.71% | 6.9% |
| 9 | Illumina Inc | 0.71% | 7.6% |
| 10 | United Therapeutics Corp | 0.68% | 8.3% |
| 11 | ATI Inc | 0.68% | 9.0% |
| 12 | MACOM Technology Solutions Holdings Inc | 0.67% | 9.7% |
| 13 | Fabrinet | 0.67% | 10.3% |
| 14 | Carpenter Technology Corp | 0.67% | 11.0% |
| 15 | Nextpower Inc | 0.66% | 11.7% |
Returns the fund reported
2019-09 – 2026-05Monthly total returns from Item B.5 of IVOO'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 0.06 percentage points over 81 months, which is roughly the distributions. Every month with the filing it came from: IVOO.json · all funds.
Who borrows IVOO's shares
2026-05-31The fund lends its holdings, and Item B.4.a of the filing names every firm holding them. At 2026-05-31, $15m was out to 9 borrowers, 0.27% of net assets. The largest, BARCLAYS BANK PLC, held 29.2% of it.
| Borrower | On loan | Share of the loan |
|---|---|---|
| BARCLAYS BANK PLC | $4m | 29.2% |
| CITIGROUP GLOBAL MARKETS INC. | $3m | 18.8% |
| BofA Securities, Inc. | $3m | 16.6% |
| UBS SECURITIES LLC | $2m | 16.3% |
| HSBC BANK PLC | $1m | 7.0% |
Cash collateral reported against the loan: 0.27% of net assets, 100.1% of the amount lent. That is a floor on the collateral, not the whole of it — collateral the fund does not hold as a position is not in this filing, so a figure under 100% is not evidence of under-collateralisation. How that figure behaves across all funds. Every quarter IVOO has filed, with each borrower: IVOO.json · all funds.
Since the previous filing
2026-02-28 → 2026-05-31403 positions became 402: 8 added (2.4% of the fund at the later date), 9 dropped (4.0% at the earlier date). Half the sum of all weight changes, a turnover proxy: 10.5%. Positions are matched on identifiers, so a security whose identifier changed shows as one drop and one add. Every filing of IVOO 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 |
|---|---|---|---|---|---|
| Flex Ltd | 0.68% | 1.58% | Royal Gold Inc | 0.70% | 0.52% |
| Sterling Infrastructure Inc | 0.38% | 0.75% | Tenet Healthcare Corp | 0.61% | 0.44% |
| Twilio Inc | 0.53% | 0.82% | Hecla Mining Co | 0.48% | 0.34% |
| Okta Inc | 0.35% | 0.60% | Tempur Sealy International Inc | 0.54% | 0.42% |
| nVent Electric PLC | 0.55% | 0.77% | AECOM | 0.38% | 0.26% |
| TD SYNNEX Corp | 0.34% | 0.56% | US Foods Holding Corp | 0.62% | 0.51% |
New: SiTime Corp (0.45%), Solstice Advanced Materials Inc (0.38%), DigitalOcean Holdings Inc (0.35%), Moog Inc (0.29%), CareTrust REIT Inc (0.26%), SharkNinja Inc (0.25%). Gone: Lumentum Holdings Inc (1.44%), Coherent Corp (1.18%), Casey's General Stores Inc (0.74%), EchoStar Corp (0.45%), Flowers Foods Inc (0.06%), Kemper Corp (0.05%).
Asset categories and pricing
as of 2026-05-3199.64% equity, 0.36% 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 2026-05-31A 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 $5.60B. Notional of an interest-rate or currency swap is not equity exposure.
| Swap counterparty | Notional | % of net assets |
|---|---|---|
| Bank of America NA | $5M | 0.09% |
Financing leg as filed: the fund pays OBFR01 + 0% on $5M of long swap notional . Issuers fill the spread field differently (some file the all-in rate), so compare within an issuer, not across.
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 IVOO (276.9). Same filings, same arithmetic. Position in this list says nothing about which fund is better.
| Fund | Reports | Behaves like | Top ten | As of |
|---|---|---|---|---|
| VXUS Vanguard Total International Stock Index Fund | 8,832 | 253.6 | 13.32% | 2026-07-31 |
| IEFA iShares Core MSCI EAFE ETF | 2,630 | 267.8 | 11.97% | 2026-07-31 |
| VEA Vanguard Developed Markets Index Fund | 3,890 | 268.9 | 13.15% | 2026-06-30 |
| AVUV Avantis U.S. Small Cap Value ETF | 797 | 272.3 | 8.67% | 2026-05-31 |
| KOMP State Street(R) SPDR(R) S&P Kensho New Economies Composite ETF | 505 | 272.8 | 9.91% | 2026-06-30 |
| DWM WisdomTree International Equity Fund | 1,406 | 277.3 | 11.38% | 2026-06-30 |
| VIOV Vanguard S&P Small-Cap 600 Value Index Fund | 463 | 282.3 | 8.86% | 2026-05-31 |
| BSVO EA Bridgeway Omni Small-Cap Value ETF | 576 | 283.5 | 7.98% | 2026-06-30 |
| DDWM WisdomTree Dynamic International Equity Fund | 1,533 | 284.3 | 11.22% | 2026-06-30 |
| IMCB iShares Morningstar Mid-Cap ETF | 396 | 285.6 | 6.94% | 2026-07-31 |
Essays that examine IVOO
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.