IWO holdings

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), 17 issuer countries.

IWO's largest investment is Moog Inc at 0.73% of net assets. BrightSpring Health Services Inc and MaxLinear Inc follow; the three together are 2.07%. Ten companies are 6.06% of the fund; the other 1,126 share the rest. Among the 721 equity funds measured here, IWO behaves like 409.7 holdings against a median of 42.4 — 9.7 times the median. Across 28 quarterly filings IWO has held roughly steady since 2019-09-30 (464.1 then, 409.7 now). Between the 2026-03-31 and 2026-06-30 filings 304 positions were added and 272 dropped; 39.8% 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.

Between 2019-09-30 and 2026-06-30, IWO went from behaving like 464.1 equally weighted positions to 409.7 — 12% fewer, while its top ten went from 5.39% to 6.06% of net assets. Read across the funds on the concentration-over-time table.

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.

IWO's filing lists 1,137 positions including 14.75% of net assets in securities-lending cash collateral. Counted as filed the fund reads 41.4 effective holdings with a top ten of 20.27%; on its own investments — the figure above — it reads 409.7 with a top ten of 6.06%. 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.

The 15 largest of 1,136 positions in IWO's Form N-PORT, weight as a share of net assets, securities-lending collateral excluded. Every position, every quarter: IWO.csv.gz.

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

Monthly total returns from Item B.5 of IWO's own filings, 84 months on record. Not computed here and not from a price feed.

Cross-checked against a series computed separately from prices: median difference 0.07 percentage points over 84 months, which is roughly the distributions. Every month with the filing it came from: IWO.json · all funds.

The fund lends its holdings, and Item B.4.a of the filing names every firm holding them. At 2026-06-30, $2.2bn was out to 31 borrowers, 14.38% of net assets. The largest, JP MORGAN SECURITIES LLC, held 20.9% of it.

Cash collateral reported against the loan: 14.75% of net assets, 102.6% 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 IWO has filed, with each borrower: IWO.json · all funds.

1,101 positions became 1,133: 304 added (17.0% of the fund at the later date), 272 dropped (31.2% at the earlier date). Half the sum of all weight changes, a turnover proxy: 39.8%. Positions are matched on identifiers, so a security whose identifier changed shows as one drop and one add. Every filing of IWO compared this way, as a feed: changes.xml · all funds: filings received.

New: JFrog Ltd. (0.60%), Cipher Digital, Inc. (0.50%), ACM Research, Inc. (0.41%), Riot Platforms, Inc. (0.39%), Hut 8 Corp. (0.38%), Perimeter Solutions, Inc. (0.33%). Gone: Bloom Energy Corp. (1.99%), Fabrinet (1.27%), Credo Technology Group Holding Ltd. (1.02%), Nextpower, Inc. (0.94%), Kratos Defense & Security Solutions, Inc. (0.86%), Advanced Energy Industries, Inc. (0.82%).

87.09% equity, 12.91% 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.

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 $15.43B. 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).

Every measured equity fund lined up by how many holdings it behaves like; these sit either side of IWO (409.7). Same filings, same arithmetic. Position in this list says nothing about which fund is better.

• Why 2,017 IWM Holdings Read as 33: Securities Lending in the Russell 2000 ETF

  IWM, the iShares Russell 2000 ETF, files 2,017 holdings but our concentration measure read it as 33. The cause is a 17% cash-collateral position from securities lending, flagged in the filing itself; set it aside and the fund's own investments behave like about 840. Seventy-three funds on this site, including IJH, IJR, RSP, LQD and HYG, had the same problem. What we found, what we changed today, and what is still open.

  14 Sept 2026 6 min ETF Analysis