Based on U.S. Department of Labor Form 5500 filings (plan years 2022–2024), 2 U.S. retirement plans report holding Blackrock Mortgage-Backed Securities K Mutual Fund in their Schedule of Assets, totaling $14K 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 | SPRINGWELL, INC. SPRINGWELL RETIREMENT PLAN | WALTHAM MA | 261 | $14.7M | $10K |
| 2 | HUDICK EXCAVATING, INC. HEI CIVIL 401(K) PLAN | CASTLE ROCK CO | 412 | $6.4M | $4K |
