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VIOO · VANGUARD S&P SMALL-CAP 600 INDEX FUND · Holdings ETF

Alerts for VIOO
$128.22 +0.08 (+0.06%)
Volume · Oct 21 71.73K Avg daily vol (3M) 81.2K

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Institutional holdings are being reconciled with SEC filings. Holder totals and changes may be incomplete until reconciliation finishes.
Holders: 70
Total Value: $334,816,673
Total Shares: 2,646,354

Institutional Ownership Trend

27 quarters

Holder Concentration

Across 70 13F filers · Δ vs Jun 30, 2026
Top Holder
43.6%
Dec 2023 → Sep 2026 · range 7.7% – 53.6%
+35.9 pts
Top 5
69.6%
Dec 2023 → Sep 2026 · range 27.6% – 77.0%
+42.1 pts
Top 10
86.4%
Dec 2023 → Sep 2026 · range 41.5% – 86.4%
+45.0 pts
HHI
2,141
Dec 2023 → Sep 2026 · range 262 – 3,057
Moderately concentrated+1,880

Who Holds VIOO

Last 8 quarters through Sep 30, 2026 (filing window open)

Each kind of 13F filer's share of the common shares 13F filers report. Holder type comes from regulatory records, never the filer's name; style, turnover and horizon are measured from each filer's own 13F book. The quarter selector does not change this card.

Jun 30, 2026, the newest closed quarter: 408 filers, like-for-like change +5.4%; actively managed books +5.4%; index-like books +6.2%.

Holder type Share Filers Change
Registered adviser 48.7% 275 +7.3%
Exempt adviser 0.0% 1 new
Adviser 3.7% 3 -4.3%
Bank 18.8% 20 -0.1%
Broker-dealer 1.9% 1 +10.7%
Non-US 0.0% 1 +5.7%
Holding company 9.8% 6 +5.1%
Insurer 0.0% 0 —
Unknown 17.2% 101 +8.7%

The Sep 30, 2026 filing window is still open, so its bar shows only the filers that have filed so far.

How the mix is measured

Shares are 13F common shares restated to today's split basis; options and principal amounts are left out. The change compares only filers with a 13F in both quarters and keeps each filer in its bucket of the later quarter on both sides; a filer that continues under a new CIK is compared through its successor. Holder type comes from each filer's current regulatory profile; client base and private funds come from the Form ADV roster current at each quarter end (rosters from December 2019, so an earlier quarter reads Unknown). Style, turnover, horizon and book size are measured from each filer's 13F book in the newest measured quarter, and Not measured means none was. Actively managed books are those measured systematic-like, concentrated or diversified active.

Excluded 2 holders with no observed 2026-03-31 13F and 3 holders with no observed 2026-06-30 13F.

Conviction and Crowding

408 13F filers, quarter ended Jun 30, 2026

Measured across every 13F filer's common-share book once the quarter's filing window closed. Crowding counts filers with high turnover or that advise private funds on Form ADV.

Conviction holders
29
7.11% of filers hold it in their top 10
Mar 31, 2026: 23
Holders above 5%
0
median weight 0.028%
Mar 31, 2026: 0
Crowding
—
shares outstanding is an issuer-wide count, not one listing's
Private-fund advisers
—
of shares outstanding
Institutional ownership
—
shares outstanding is an issuer-wide count, not one listing's
Top 10 holders
41.5%
of 13F shares, Herfindahl 0.026
Active holders
+5.4%
like-for-like share change of active filers
5% stakes on record
0
0 13D, 0 13G
How long holders have held it value-weighted 18.9 quarters
Under 1 year 5.04% 1 to 3 years 21.6% 3 years or more 73.3% Since coverage start 0.000%

Managers in the top fifth by current three-year FundScore alpha were net buyers of $0 (0 buying, 0 selling).

Quarterly Activity

vs Jun 30, 2026
New
3
Increased
20
Decreased
24
Sold Out
8
Unchanged
21

New and Sold Out count only filers that reported a 13F for both quarters: a first-time filer's book is not a buy, and a fund that has not filed, or withheld its positions under confidential treatment, has not sold.

Holder count: -340
Institutional value: -83.2%
Shares held: -81.7%

Top Buyers

vs Jun 30, 2026
Institution Added Now Holds Open

Top Sellers

vs Jun 30, 2026
Institution Sold Now Holds Open

Top New Positions

vs Jun 30, 2026
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Jun 30, 2026
Institution Previously Held Last Value (USD) Open
Showing 70 of 70
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Holder Value (USD) % of 13F Shares Open