Largest institutional buys per CUSIP this quarter (cross-fund leaderboard)

Derived cross-fund leaderboard of quarter-over-quarter institutional accumulation. Walks the top-N filers in the requested quarter (ranked by AUM), diffs each filer's per-position share count against the immediately-prior retained quarter, aggregates the POSITIVE share-deltas by CUSIP, and returns the largest rollups by dollar value. Each row reports total shares added, total value added (in $thousands), distinct fund count, and a sample of the top contributing buyers. PUT/CALL option rows are excluded (stock-accumulation signal only). Sales are excluded - this is a strict 'buy' signal. Optional ?quarter=<stem> scans a historical quarter (default: newest retained stem; from_stem is auto-resolved to the next-prior stem in the retention manifest). v1 limitation: scope bounded to top-N filers (default 100, max 300); full-universe scan deferred to v2 via ingest-side pre-aggregation.

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🟢200OK

application/json

Cross-fund leaderboard of CUSIPs accumulated this quarter.

Bodyapplication/json

Example

{
    "data": {
        "comparison": {
            "from_period_end": "string",
            "to_period_end": "string",
            "quarters_apart": 0,
            "calendar_adjacent": true,
            "skipped_quarters": [
                "string"
            ],
            "note": "string"
        },
        "to_stem": "string",
        "from_stem": "string",
        "filer_top_n": 0,
        "filers_scanned": 0,
        "funds_with_buys": 0,
        "cusip_count": 0,
        "limit": 0,
        "top_buys": [
            {
                "cusip": "037833100",
                "issuer": "string",
                "title": "string",
                "total_shares_added": 0,
                "total_value_added_usd_thousands": 0,
                "funds_buying": 0,
                "sample_buyers": [
                    {
                        "cik": "0001067983",
                        "manager_name": "BERKSHIRE HATHAWAY INC",
                        "shares_delta": 0,
                        "value_delta_usd_thousands": 0
                    }
                ]
            }
        ]
    },
    "meta": {
        "endpoint": "/api/v1/fred/us/cpi",
        "data_time": "2026-04-16T14:30:00Z",
        "response_time": "2026-04-16T14:30:12Z",
        "provider": "Sugra API v1.0.1",
        "data_age_days": 0,
        "source": "string",
        "attribution": "string",
        "fallback_used": true,
        "fallback_chain": [
            "string"
        ],
        "cached": true,
        "stale": true,
        "period": "string",
        "notes": "string"
    }
}

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🟠422Parameter Error

🟠429

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Largest institutional buys per CUSIP this quarter (cross-fund leaderboard)

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