Based on U.S. Department of Labor Form 5500 filings (plan years 2022–2024), 2 U.S. retirement plans report holding SHARES / PAR 912803GS6 UNITED STATES OF AMERICA BOND ZERO CPN 1 SEMI-ANN. 0.000% 05/15/2053 in their Schedule of Assets, totaling $239.9M in parsed positions. Matched on the normalized security name across each plan’s latest filing and ranked by position size.