Based on U.S. Department of Labor Form 5500 filings (plan years 2022–2024), 1 U.S. retirement plans report holding Mainstay S & P 500 Idx I in their Schedule of Assets, totaling $24.0M in parsed positions. Matched on the normalized security name across each plan’s latest filing and ranked by position size.
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| # | Sponsor / Plan | Location | Participants | Plan assets (EOY) | Position |
|---|---|---|---|---|---|
| 1 | IBEW LOCAL UNION 269 ANNUITY FUND IBEW LOCAL UNION 269 ANNUITY FUND | WEST TRENTON NJ | 989 | $298.1M | $24.0M |
