Extraction schema:
{"type": "object", "title": "Vanguard Schedule of Investments (real content)", "additionalProperties": false, "properties": {"fund_name": {"type": "string", "description": "Fund name as printed in the page header, e.g. 'Mega Cap Growth Index Fund'."}, "as_of_date": {"type": "string", "description": "Schedule as-of date as printed after 'As of', e.g. 'March 31, 2026'."}, "total_investments_thousands": {"type": "integer", "description": "Printed 'Total Investments' market value in $000."}, "net_assets_thousands": {"type": "integer", "description": "Printed 'Net Assets (100%)' value in $000."}, "holdings": {"type": "array", "description": "Every holding row of the Schedule of Investments, in print order.", "items": {"type": "object", "additionalProperties": false, "properties": {"security_name": {"type": "string", "description": "Security name as printed (without leading footnote markers)."}, "marks": {"type": "array", "items": {"type": "string"}, "description": "Leading superscript footnote markers, e.g. ['*'] or ['1'] or ['*','2']."}, "asset_class": {"type": ["string", "null"], "description": "Top-level class heading, e.g. 'Common Stocks'."}, "asset_class_percent": {"type": ["number", "null"], "description": "Percent of net assets printed on the class heading."}, "group": {"type": ["string", "null"], "description": "Sector/country/sub-class heading, e.g. 'Basic Materials' or 'Japan'."}, "group_percent": {"type": ["number", "null"], "description": "Percent of net assets printed on the group heading."}, "shares": {"type": ["integer", "null"], "description": "Shares held (null for face-amount rows)."}, "face_amount_thousands": {"type": ["integer", "null"], "description": "Face amount in $000 for fixed-income/repo rows (null otherwise)."}, "inline_cost_thousands": {"type": ["integer", "null"], "description": "Cost printed inline after the name as '(Cost $N)', in $000."}, "market_value_thousands": {"type": "integer", "description": "Market value in $000 (0 when printed as an em dash)."}, "source_page": {"type": ["integer", "null"], "description": "1-based PDF page where this holding row is printed."}}, "required": ["security_name", "marks", "asset_class", "asset_class_percent", "group", "group_percent", "shares", "face_amount_thousands", "inline_cost_thousands", "market_value_thousands", "source_page"]}}}, "required": ["fund_name", "as_of_date", "total_investments_thousands", "net_assets_thousands", "holdings"]}

Expected output:
{"fund_name": "Mega Cap Growth Index Fund", "as_of_date": "March 31, 2026", "total_investments_thousands": 27839448, "net_assets_thousands": 27851794, "holdings": [{"security_name": "Ecolab Inc.", "marks": [], "asset_class": "Common Stocks", "asset_class_percent": 99.8, "group": "Basic Materials", "group_percent": 0.5, "shares": 487230, "face_amount_thousands": null, "inline_cost_thousands": null, "market_value_thousands": 129613, "source_page": 1}, {"security_name": "Amazon.com Inc.", "marks": ["*"], "asset_class": "Common Stocks", "asset_class_percent": 99.8, "group": "Consumer Discretionary", "group_percent": 15.6, "shares": 6142387, "face_amount_thousands": null, "inline_cost_thousands": null, "market_value_thousands": 1279275, "source_page": 1}, {"security_name": "Tesla Inc.", "marks": ["*"], "asset_class": "Common Stocks", "asset_class_percent": 99.8, "group": "Consumer Discretionary", "group_percent": 15.6, "shares": 3133401, "face_amount_thousands": null, "inline_cost_thousands": null, "market_value_thousands": 1164842, "source_page": 1}, {"security_name": "Netflix Inc.", "marks": ["*"], "asset_class": "Common Stocks", "asset_class_percent": 99.8, "group": "Consumer Discretionary", "group_percent": 15.6, "shares": 5091209, "face_amount_thousands": null, "inline_cost_thousands": null, "market_value_thousands": 489520, "source_page": 1}, {"security_name": "TJX Cos. Inc.", "marks": [], "asset_class": "Common Stocks", "asset_class_percent": 99.8, "group": "Consumer Discretionary", "group_percent": 15.6, "shares": 1562928, "face_amount_thousands": null, "inline_cost_thousands": null, "market_value_thousands": 249600, "source_page": 1}, {"security_name": "Uber Technologies Inc.", "marks": ["*"], "asset_class": "Common Stocks", "asset_class_percent": 99.8, "group": "Consumer Discretionary", "group_percent": 15.6, "shares": 3000670, "face_amount_thousands": null, "inline_cost_thousands": null, "market_value_thousands": 215838, "source_page": 1}, {"security_name": "Booking Holdings Inc.", "marks": [], "asset_class": "Common Stocks", "asset_class_percent": 99.8, "group": "Consumer Discretionary", "group_percent": 15.6, "shares": 47105, "face_amount_thousands": null, "inline_cost_thousands": null, "market_value_thousands": 198327, "source_page": 1}, {"security_name": "McDonald's Corp.", "marks": [], "asset_class": "Common Stocks", "asset_class_percent": 99.8, "group": "Consumer Discretionary", "group_percent": 15.6, "shares": 564271, "face_amount_thousands": null, "inline_cost_thousands": null, "market_value_thousands": 175370, "source_page": 1}, {"security_name": "O'Reilly Automotive Inc.", "marks": ["*"], "asset_class": "Common Stocks", "asset_class_percent": 99.8, "group": "Consumer Discretionary", "group_percent": 15.6, "shares": 1544497, "face_amount_thousands": null, "inline_cost_thousands": null, "market_value_thousands": 142572, "source_page": 1}, {"security_name": "Marriott International Inc. Class A", "marks": [], "asset_class": "Common Stocks", "asset_class_percent": 99.8, "group": "Consumer Discretionary", "group_percent": 15.6, "shares": 415242, "face_amount_thousands": null, "inline_cost_thousands": null, "market_value_thousands": 135813, "source_page": 1}, {"security_name": "Airbnb Inc. Class A", "marks": ["*"], "asset_class": "Common Stocks", "asset_class_percent": 99.8, "group": "Consumer Discretionary", "group_percent": 15.6, "shares": 867473, "face_amount_thousands": null, "inline_cost_thousands": null, "market_value_thousands": 109544, "source_page": 1}, {"security_name": "Hilton Worldwide Holdings Inc.", "marks": [], "asset_class": "Common Stocks", "asset_class_percent": 99.8, "group": "Consumer Discretionary", "group_percent": 15.6, "shares": 328358, "face_amount_thousands": null, "inline_cost_thousands": null, "market_value_thousands": 99847, "source_page": 1}, {"security_name": "AutoZone Inc.", "marks": ["*"], "asset_class": "Common Stocks", "asset_class_percent": 99.8, "group": "Consumer Discretionary", "group_percent": 15.6, "shares": 25752, "face_amount_thousands": null, "inline_cost_thousands": null, "market_value_thousands": 86985, "source_page": 1}, {"security_name": "Monster Beverage Corp.", "marks": ["*"], "asset_class": "Common Stocks", "asset_class_percent": 99.8, "group": "Consumer Staples", "group_percent": 0.4, "shares": 1541507, "face_amount_thousands": null, "inline_cost_thousands": null, "market_value_thousands": 111697, "source_page": 1}, {"security_name": "Moody's Corp.", "marks": [], "asset_class": "Common Stocks", "asset_class_percent": 99.8, "group": "Financials", "group_percent": 1.2, "shares": 290486, "face_amount_thousands": null, "inline_cost_thousands": null, "market_value_thousands": 126725, "source_page": 1}, {"security_name": "S&P Global Inc.", "marks": [], "asset_class": "Common Stocks", "asset_class_percent": 99.8, "group": "Financials", "group_percent": 1.2, "shares": 290300, "face_amount_thousands": null, "inline_cost_thousands": null, "market_value_thousands": 123476, "source_page": 1}, {"security_name": "Interactive Brokers Group Inc. Class A", "marks": [], "asset_class": "Common Stocks", "asset_class_percent": 99.8, "group": "Financials", "group_percent": 1.2, "shares": 1152497, "face_amount_thousands": null, "inline_cost_thousands": null, "market_value_thousands": 77298, "source_page": 1}, {"security_name": "Eli Lilly & Co.", "marks": [], "asset_class": "Common Stocks", "asset_class_percent": 99.8, "group": "Health Care", "group_percent": 5.2, "shares": 960628, "face_amount_thousands": null, "inline_cost_thousands": null, "market_value_thousands": 883556, "source_page": 1}, {"security_name": "Intuitive Surgical Inc.", "marks": ["*"], "asset_class": "Common Stocks", "asset_class_percent": 99.8, "group": "Health Care", "group_percent": 5.2, "shares": 501900, "face_amount_thousands": null, "inline_cost_thousands": null, "market_value_thousands": 231371, "source_page": 1}, {"security_name": "Vertex Pharmaceuticals Inc.", "marks": ["*"], "asset_class": "Common Stocks", "asset_class_percent": 99.8, "group": "Health Care", "group_percent": 5.2, "shares": 404174, "face_amount_thousands": null, "inline_cost_thousands": null, "market_value_thousands": 180480, "source_page": 1}, {"security_name": "Boston Scientific Corp.", "marks": [], "asset_class": "Common Stocks", "asset_class_percent": 99.8, "group": "Health Care", "group_percent": 5.2, "shares": 2436940, "face_amount_thousands": null, "inline_cost_thousands": null, "market_value_thousands": 152918, "source_page": 1}, {"security_name": "Visa Inc. Class A", "marks": [], "asset_class": "Common Stocks", "asset_class_percent": 99.8, "group": "Industrials", "group_percent": 6.3, "shares": 1813309, "face_amount_thousands": null, "inline_cost_thousands": null, "market_value_thousands": 548054, "source_page": 1}, {"security_name": "Mastercard Inc. Class A", "marks": [], "asset_class": "Common Stocks", "asset_class_percent": 99.8, "group": "Industrials", "group_percent": 6.3, "shares": 961228, "face_amount_thousands": null, "inline_cost_thousands": null, "market_value_thousands": 480287, "source_page": 1}, {"security_name": "GE Vernova Inc.", "marks": [], "asset_class": "Common Stocks", "asset_class_percent": 99.8, "group": "Industrials", "group_percent": 6.3, "shares": 363473, "face_amount_thousands": null, "inline_cost_thousands": null, "market_value_thousands": 317276, "source_page": 1}, {"security_name": "Boeing Co.", "marks": ["*"], "asset_class": "Common Stocks", "asset_class_percent": 99.8, "group": "Industrials", "group_percent": 6.3, "shares": 1098393, "face_amount_thousands": null, "inline_cost_thousands": null, "market_value_thousands": 218613, "source_page": 1}, {"security_name": "Sherwin-Williams Co.", "marks": [], "asset_class": "Common Stocks", "asset_class_percent": 99.8, "group": "Industrials", "group_percent": 6.3, "shares": 312003, "face_amount_thousands": null, "inline_cost_thousands": null, "market_value_thousands": 100013, "source_page": 1}, {"security_name": "Cintas Corp.", "marks": [], "asset_class": "Common Stocks", "asset_class_percent": 99.8, "group": "Industrials", "group_percent": 6.3, "shares": 483522, "face_amount_thousands": null, "inline_cost_thousands": null, "market_value_thousands": 81783, "source_page": 1}, {"security_name": "Welltower Inc.", "marks": [], "asset_class": "Common Stocks", "asset_class_percent": 99.8, "group": "Real Estate", "group_percent": 1.3, "shares": 1040923, "face_amount_thousands": null, "inline_cost_thousands": null, "market_value_thousands": 205801, "source_page": 1}, {"security_name": "Equinix Inc.", "marks": [], "asset_class": "Common Stocks", "asset_class_percent": 99.8, "group": "Real Estate", "group_percent": 1.3, "shares": 169913, "face_amount_thousands": null, "inline_cost_thousands": null, "market_value_thousands": 166555, "source_page": 1}, {"security_name": "NVIDIA Corp.", "marks": [], "asset_class": "Common Stocks", "asset_class_percent": 99.8, "group": "Technology", "group_percent": 68.3, "shares": 21954606, "face_amount_thousands": null, "inline_cost_thousands": null, "market_value_thousands": 3828883, "source_page": 1}, {"security_name": "Apple Inc.", "marks": [], "asset_class": "Common Stocks", "asset_class_percent": 99.8, "group": "Technology", "group_percent": 68.3, "shares": 13827068, "face_amount_thousands": null, "inline_cost_thousands": null, "market_value_thousands": 3509172, "source_page": 1}, {"security_name": "Microsoft Corp.", "marks": [], "asset_class": "Common Stocks", "asset_class_percent": 99.8, "group": "Technology", "group_percent": 68.3, "shares": 6782733, "face_amount_thousands": null, "inline_cost_thousands": null, "market_value_thousands": 2510764, "source_page": 1}, {"security_name": "Alphabet Inc. Class A", "marks": [], "asset_class": "Common Stocks", "asset_class_percent": 99.8, "group": "Technology", "group_percent": 68.3, "shares": 5339630, "face_amount_thousands": null, "inline_cost_thousands": null, "market_value_thousands": 1535464, "source_page": 1}, {"security_name": "Broadcom Inc.", "marks": [], "asset_class": "Common Stocks", "asset_class_percent": 99.8, "group": "Technology", "group_percent": 68.3, "shares": 3963205, "face_amount_thousands": null, "inline_cost_thousands": null, "market_value_thousands": 1226651, "source_page": 1}, {"security_name": "Alphabet Inc. Class C", "marks": [], "asset_class": "Common Stocks", "asset_class_percent": 99.8, "group": "Technology", "group_percent": 68.3, "shares": 4239359, "face_amount_thousands": null, "inline_cost_thousands": null, "market_value_thousands": 1216102, "source_page": 1}, {"security_name": "Meta Platforms Inc. Class A", "marks": [], "asset_class": "Common Stocks", "asset_class_percent": 99.8, "group": "Technology", "group_percent": 68.3, "shares": 2030783, "face_amount_thousands": null, "inline_cost_thousands": null, "market_value_thousands": 1161872, "source_page": 1}, {"security_name": "Advanced Micro Devices Inc.", "marks": ["*"], "asset_class": "Common Stocks", "asset_class_percent": 99.8, "group": "Technology", "group_percent": 68.3, "shares": 2046268, "face_amount_thousands": null, "inline_cost_thousands": null, "market_value_thousands": 416272, "source_page": 1}, {"security_name": "Palantir Technologies Inc. Class A", "marks": ["*"], "asset_class": "Common Stocks", "asset_class_percent": 99.8, "group": "Technology", "group_percent": 68.3, "shares": 2696548, "face_amount_thousands": null, "inline_cost_thousands": null, "market_value_thousands": 394451, "source_page": 1}, {"security_name": "Lam Research Corp.", "marks": [], "asset_class": "Common Stocks", "asset_class_percent": 99.8, "group": "Technology", "group_percent": 68.3, "shares": 1631258, "face_amount_thousands": null, "inline_cost_thousands": null, "market_value_thousands": 348535, "source_page": 1}, {"security_name": "Oracle Corp.", "marks": [], "asset_class": "Common Stocks", "asset_class_percent": 99.8, "group": "Technology", "group_percent": 68.3, "shares": 2228203, "face_amount_thousands": null, "inline_cost_thousands": null, "market_value_thousands": 327791, "source_page": 1}, {"security_name": "KLA Corp.", "marks": [], "asset_class": "Common Stocks", "asset_class_percent": 99.8, "group": "Technology", "group_percent": 68.3, "shares": 184658, "face_amount_thousands": null, "inline_cost_thousands": null, "market_value_thousands": 271892, "source_page": 1}, {"security_name": "Amphenol Corp. Class A", "marks": [], "asset_class": "Common Stocks", "asset_class_percent": 99.8, "group": "Technology", "group_percent": 68.3, "shares": 1769442, "face_amount_thousands": null, "inline_cost_thousands": null, "market_value_thousands": 223569, "source_page": 1}, {"security_name": "Palo Alto Networks Inc.", "marks": ["*"], "asset_class": "Common Stocks", "asset_class_percent": 99.8, "group": "Technology", "group_percent": 68.3, "shares": 1238209, "face_amount_thousands": null, "inline_cost_thousands": null, "market_value_thousands": 198510, "source_page": 1}, {"security_name": "Intuit Inc.", "marks": [], "asset_class": "Common Stocks", "asset_class_percent": 99.8, "group": "Technology", "group_percent": 68.3, "shares": 422970, "face_amount_thousands": null, "inline_cost_thousands": null, "market_value_thousands": 182884, "source_page": 1}, {"security_name": "Sandisk Corp.", "marks": ["*"], "asset_class": "Common Stocks", "asset_class_percent": 99.8, "group": "Technology", "group_percent": 68.3, "shares": 271771, "face_amount_thousands": null, "inline_cost_thousands": null, "market_value_thousands": 172667, "source_page": 2}, {"security_name": "ServiceNow Inc.", "marks": ["*"], "asset_class": "Common Stocks", "asset_class_percent": 99.8, "group": "Technology", "group_percent": 68.3, "shares": 1604167, "face_amount_thousands": null, "inline_cost_thousands": null, "market_value_thousands": 167716, "source_page": 2}, {"security_name": "Crowdstrike Holdings Inc. Class A", "marks": ["*"], "asset_class": "Common Stocks", "asset_class_percent": 99.8, "group": "Technology", "group_percent": 68.3, "shares": 397567, "face_amount_thousands": null, "inline_cost_thousands": null, "market_value_thousands": 155214, "source_page": 2}, {"security_name": "AppLovin Corp. Class A", "marks": ["*"], "asset_class": "Common Stocks", "asset_class_percent": 99.8, "group": "Technology", "group_percent": 68.3, "shares": 383092, "face_amount_thousands": null, "inline_cost_thousands": null, "market_value_thousands": 152471, "source_page": 2}, {"security_name": "Salesforce Inc.", "marks": [], "asset_class": "Common Stocks", "asset_class_percent": 99.8, "group": "Technology", "group_percent": 68.3, "shares": 761372, "face_amount_thousands": null, "inline_cost_thousands": null, "market_value_thousands": 142125, "source_page": 2}, {"security_name": "Cadence Design Systems Inc.", "marks": ["*"], "asset_class": "Common Stocks", "asset_class_percent": 99.8, "group": "Technology", "group_percent": 68.3, "shares": 500175, "face_amount_thousands": null, "inline_cost_thousands": null, "market_value_thousands": 138984, "source_page": 2}, {"security_name": "Synopsys Inc.", "marks": ["*"], "asset_class": "Common Stocks", "asset_class_percent": 99.8, "group": "Technology", "group_percent": 68.3, "shares": 344075, "face_amount_thousands": null, "inline_cost_thousands": null, "market_value_thousands": 136419, "source_page": 2}, {"security_name": "Corning Inc.", "marks": [], "asset_class": "Common Stocks", "asset_class_percent": 99.8, "group": "Technology", "group_percent": 68.3, "shares": 911200, "face_amount_thousands": null, "inline_cost_thousands": null, "market_value_thousands": 123896, "source_page": 2}, {"security_name": "Marvell Technology Inc.", "marks": [], "asset_class": "Common Stocks", "asset_class_percent": 99.8, "group": "Technology", "group_percent": 68.3, "shares": 1152228, "face_amount_thousands": null, "inline_cost_thousands": null, "market_value_thousands": 114128, "source_page": 2}, {"security_name": "Adobe Inc.", "marks": ["*"], "asset_class": "Common Stocks", "asset_class_percent": 99.8, "group": "Technology", "group_percent": 68.3, "shares": 434985, "face_amount_thousands": null, "inline_cost_thousands": null, "market_value_thousands": 105736, "source_page": 2}, {"security_name": "Fortinet Inc.", "marks": ["*"], "asset_class": "Common Stocks", "asset_class_percent": 99.8, "group": "Technology", "group_percent": 68.3, "shares": 1052337, "face_amount_thousands": null, "inline_cost_thousands": null, "market_value_thousands": 85997, "source_page": 2}, {"security_name": "Autodesk Inc.", "marks": ["*"], "asset_class": "Common Stocks", "asset_class_percent": 99.8, "group": "Technology", "group_percent": 68.3, "shares": 349030, "face_amount_thousands": null, "inline_cost_thousands": null, "market_value_thousands": 83558, "source_page": 2}, {"security_name": "Snowflake Inc.", "marks": ["*"], "asset_class": "Common Stocks", "asset_class_percent": 99.8, "group": "Technology", "group_percent": 68.3, "shares": 514752, "face_amount_thousands": null, "inline_cost_thousands": null, "market_value_thousands": 77635, "source_page": 2}, {"security_name": "Arista Networks Inc.", "marks": ["*"], "asset_class": "Common Stocks", "asset_class_percent": 99.8, "group": "Telecommunications", "group_percent": 1.1, "shares": 1595378, "face_amount_thousands": null, "inline_cost_thousands": null, "market_value_thousands": 195881, "source_page": 2}, {"security_name": "T-Mobile US Inc.", "marks": [], "asset_class": "Common Stocks", "asset_class_percent": 99.8, "group": "Telecommunications", "group_percent": 1.1, "shares": 512256, "face_amount_thousands": null, "inline_cost_thousands": null, "market_value_thousands": 107589, "source_page": 2}, {"security_name": "Vanguard Market Liquidity Fund, 3.687%", "marks": ["1"], "asset_class": "Temporary Cash Investments", "asset_class_percent": 0.2, "group": "Money Market Fund", "group_percent": 0.2, "shares": 435752, "face_amount_thousands": null, "inline_cost_thousands": 43574, "market_value_thousands": 43571, "source_page": 2}]}