Route One Investment Company, L.P. — 13F Holdings & Portfolio
CIK 1512171 · latest 13F-HR filed 2026-05-15
Route One Investment Company, L.P. manages $2.35B in 13F-reported U.S. long-equity assets across 19 reported positions as of its 2026-03-31 13F-HR filing. Its largest disclosed positions are POST (12.42%), GWRE (11.77%), AMZN (9.15%). Quarter over quarter (versus its 2025-12-31 filing) the fund opened 3 new positions, exited 0, added to 3, and trimmed 10.
AUM is the long-equity portion reported on Form 13F-HR. Excludes short positions, cash, foreign holdings, and non-13F assets. For informational purposes only — not investment advice.
$2.35B
Long-equity book
19
Distinct positions
2026-03-31
Filed 2026-05-15
+3 / −0 / ↑3 / ↓10
vs 2025-12-31
| Name | Title / Status | Ownership | Type |
|---|
Top Adds (vs prior quarter)
- VISTA ENERGY S.A.B. DE C.V.$42.0M +84.2%
- HERBALIFE LTD$15.9M +15.1%
- BBB FOODS INC$7.8M +16.9%
Top Trims
- ESSEX PPTY TR INC-$67.4M -48.3%
- GUIDEWIRE SOFTWARE INC-$59.2M -17.6%
- AMAZON COM INC-$47.7M -18.2%
- THERMO FISHER SCIENTIFIC INC-$25.6M -16.7%
- SCHWAB CHARLES CORP-$25.6M -13.9%
New Positions
- MERCADOLIBRE INC$77.4M
- GRUPO FINANCIERO GALICIA S.A$27.1M
- BANCO MACRO SA$25.7M
Rows tagged Call or Put are options positions, not stock. Per SEC Form 13F-HR, Value shows the notional value of the underlying (shares covered × underlying price), not the option premium. Shares is the number of underlying shares covered (divide by 100 for contract count).
| # | Issuer | Symbol | CUSIP | Value | Weight | Shares | Type |
|---|---|---|---|---|---|---|---|
| 1 | POST HLDGS INC | POST | 737446104 | $291.7M | 12.42% | 2,950,568 | SH |
| 2 | GUIDEWIRE SOFTWARE INC | GWRE | 40171V100 | $276.6M | 11.77% | 1,849,364 | SH |
| 3 | AMAZON COM INC | AMZN | 023135106 | $215.0M | 9.15% | 1,032,200 | SH |
| 4 | NEW YORK TIMES CO | NYT | 650111107 | $205.9M | 8.76% | 2,458,659 | SH |
| 5 | ALPHABET INC | GOOG | 02079K107 | $197.7M | 8.41% | 689,080 | SH |
| 6 | SCHWAB CHARLES CORP | SCHW | 808513105 | $158.1M | 6.73% | 1,682,243 | SH |
| 7 | UNITEDHEALTH GROUP INC | UNH | 91324P102 | $144.2M | 6.14% | 532,875 | SH |
| 8 | THERMO FISHER SCIENTIFIC INC | TMO | 883556102 | $127.2M | 5.41% | 258,700 | SH |
| 9 | HERBALIFE LTD | HLF | G4412G101 | $121.1M | 5.16% | 8,227,300 | SH |
| 10 | KILROY RLTY CORP | KRC | 49427F108 | $114.2M | 4.86% | 4,049,563 | SH |
| 11 | VISTA ENERGY S.A.B. DE C.V. | VIST | 92837L109 | $91.8M | 3.91% | 1,216,700 | SH |
| 12 | MERCADOLIBRE INC | MELI | 58733R102 | $77.4M | 3.30% | 44,785 | SH |
| 13 | ESSEX PPTY TR INC | ESS | 297178105 | $72.1M | 3.07% | 297,912 | SH |
| 14 | SPDR S&P 500 ETF TR Put | SPY | 78462F103 | $65.0M | 2.77% | 100,000 | SH |
| 15 | BBB FOODS INC | TBBB | G0896C103 | $54.1M | 2.30% | 1,529,296 | SH |
| 16 | PROCORE TECHNOLOGIES INC | PCOR | 74275K108 | $52.3M | 2.23% | 918,205 | SH |
| 17 | VEEVA SYS INC | VEEV | 922475108 | $32.0M | 1.36% | 182,200 | SH |
| 18 | GRUPO FINANCIERO GALICIA S.A | GGAL | 399909100 | $27.1M | 1.15% | 579,350 | SH |
| 19 | BANCO MACRO SA | BMA | 05961W105 | $25.7M | 1.09% | 332,111 | SH |
| Period | Filed | AUM | Holdings | Accession |
|---|---|---|---|---|
| 2026-03-31 | 2026-05-15 | $2.35B | 19 | 0000935836-26-000267 |
| 2025-12-31 | 2026-02-17 | $2.69B | 16 | 0000935836-26-000110 |
| 2025-09-30 | 2025-11-14 | $2.70B | 18 | 0000935836-25-000701 |