Immutable verification record
VANGUARD PRIMECAP FUND
Run 363649da-fcfb-4007-87ef-de06de7710ca · portfolio period 2026-03-31 · captured 2026-07-29T14:22:09.616Z
This is the permanent record of what our July 29, 2026 data run computed for Vanguard Primecap Fund, and the exact SEC documents every number came from — it exists so anyone can check us.
Current interpretation · methodology 1.5
How to read this prior-run record now
This portfolio genuinely differs from the S&P 500 (66.6% active share). Its 0.27% fee buys real active management; whether it earned that fee is not something holdings can show.
This interpretation is computed under the current methodology and is not inserted into the immutable record below.Cite these figures
Each snippet includes the figure’s source-event date and immutable verification URL.
Best-fit active share
Sensible Investor, “VANGUARD PRIMECAP FUND — best-fit active share,” 66.6% versus the S&P 500, fund portfolio as of 2026-03-31; measured against the filed holdings of iShares Core S&P 500 ETF (IVV), as of 2026-03-31. https://sensible-investor.com/registry/vpmax/as-of/363649da-fcfb-4007-87ef-de06de7710ca
VPMAX filed expense ratio
Sensible Investor, “VANGUARD PRIMECAP FUND — filed expense ratio,” 0.27% for VPMAX, as of 2025-09-30. https://sensible-investor.com/registry/vpmax/as-of/363649da-fcfb-4007-87ef-de06de7710ca
VPMAX fee per active unit
Sensible Investor, “VANGUARD PRIMECAP FUND — fee per unit of active management,” 0.41% using the VPMAX expense ratio as of 2025-09-30 and fund portfolio as of 2026-03-31. https://sensible-investor.com/registry/vpmax/as-of/363649da-fcfb-4007-87ef-de06de7710ca
Active share by comparison index
| Index | Active share | Holdings evidence | Identifier match |
|---|---|---|---|
| the S&P 500 | 66.6% | measured against the filed holdings of iShares Core S&P 500 ETF (IVV), as of 2026-03-31 | 80.6% |
| the Russell 1000 index | 67.0% | measured against the filed holdings of iShares Russell 1000 ETF (IWB), as of 2026-03-31 | 85.0% |
| the total US market | 67.8% | measured against the filed holdings of Vanguard Total Stock Market ETF (VTI), as of 2026-03-31 | 84.7% |
| the Russell 1000 Growth index | 73.5% | measured against the filed holdings of iShares Russell 1000 Growth ETF (IWF), as of 2026-03-31 | 52.3% |
| the Russell 1000 Value index | 75.7% | measured against the filed holdings of iShares Russell 1000 Value ETF (IWD), as of 2026-03-31 | 61.2% |
| the S&P MidCap 400 | 97.4% | measured against the filed holdings of iShares Core S&P Mid-Cap ETF (IJH), as of 2026-03-31 | 3.5% |
| the S&P SmallCap 600 | 99.9% | measured against the filed holdings of iShares Core S&P Small-Cap ETF (IJR), as of 2026-03-31 | 0.1% |
| the Russell 2000 index | 100.0% | measured against the filed holdings of iShares Russell 2000 ETF (IWM), as of 2026-03-31 | 0.0% |
Filed expense ratios by share class
| Share class | Expense ratio | Filing period | SEC document |
|---|---|---|---|
| VPMAX (Vanguard Primecap Fund) | 0.27% | 2025-09-30 | Open SEC expense filing |
| VPMCX (Vanguard Primecap Fund) | 0.35% | 2025-09-30 | Open SEC expense filing |
Match rates
| Fund identifier match | 80.6% |
|---|---|
| the S&P 500 | 80.6% |
| the Russell 1000 index | 85.0% |
| the total US market | 84.7% |
| the Russell 1000 Growth index | 52.3% |
| the Russell 1000 Value index | 61.2% |
| the S&P MidCap 400 | 3.5% |
| the S&P SmallCap 600 | 0.1% |
| the Russell 2000 index | 0.0% |
Fee-drag windows
| Share class | Window | Fee drag | Window dates |
|---|---|---|---|
| VPMAX | 10 years | $8,958 | 2016-07-29 to 2026-07-29 |
| VPMAX | 20 years | $38,084 | 2006-07-31 to 2026-07-29 |
| VPMAX | 30 years | proxy history begins 2000 — no full 30-year window | Proxy history begins 2000-05-19 |
| VPMCX | 10 years | $11,678 | 2016-07-29 to 2026-07-29 |
| VPMCX | 20 years | $49,465 | 2006-07-31 to 2026-07-29 |
| VPMCX | 30 years | proxy history begins 2000 — no full 30-year window | Proxy history begins 2000-05-19 |
Check it yourself
- Open the fund’s linked SEC holdings filing and, for fees, the linked SEC expense filing in the table above.
- Find each security identifier and portfolio weight in the holdings filing, and the net annual operating expense for the relevant share class in its expense filing.
- Recalculate the comparison using the active-share formula and portfolio rules.
Raw record (JSON)
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