Route One Investment Company, L.P. 13F: Quarter-over-Quarter Portfolio Changes
Route One Investment Company, L.P. reported a disclosed portfolio value of approximately $2.3 billion in its latest SEC Form 13F-HR filing for Q1 2026, down 4.7% quarter on quarter. Over the quarter, the fund initiated 3 new positions, bought more shares in 7 holdings, and trimmed 6 holdings.
Route One Investment Company, L.P.'s top buy was a new stake in Mercadolibre INC (MELI) , equal to 3.4% of the disclosed portfolio. Its top sell was Essex Ppty Tr INC (ESS) . The fund sold 44.1% of its previously reported shares, reducing the position's portfolio weight by 2.7 percentage points.
New PositionsQ1 2026
Securities disclosed for the first time in Q1 2026 that were not present in the prior 13F-HR filing.
| Company | Ticker | Initial Portfolio Weight | History |
|---|---|---|---|
| MERCADOLIBRE INC | MELI | 3.4% | Holders → |
| GRUPO FINANCIERO GALICIA S.A | GGAL | 1.2% | Holders → |
| BANCO MACRO SA | BMA | 1.1% | Holders → |
Top BuysQ1 2026
The fund's top buys among existing positions in Q1 2026. Ranked by portfolio-weight impact, with the percentage of additional shares shown separately.
| Company | Ticker | Portfolio Weight Change | More Shares | History |
|---|---|---|---|---|
| KILROY REALTY CORP | KRC | +0.4% | +38.0% | History → |
| VISTA ENERGY SAB | VIST | +1.9% | +18.8% | Holders → |
| VEEVA SYSTEMS | VEEV | +-0.0% | +17.5% | Holders → |
| GUIDEWIRE SOFTWARE INC | GWRE | +-1.9% | +10.7% | History → |
| BBB FOODS INC | TBBB | +0.4% | +10.4% | Holders → |
| UNITEDHEALTH GROUP | UNH | +-0.7% | +5.0% | History → |
| HERBALIFE LTD | HLF | +0.9% | +0.8% | History → |
Top SellsQ1 2026
The fund's top sells among positions it retained in Q1 2026. Ranked by portfolio-weight impact. Full exits are listed separately.
| Company | Ticker | Portfolio Weight Change | Shares Sold | History |
|---|---|---|---|---|
| ESSEX PPTY TR INC | ESS | -2.7% | 44.1% | Holders → |
| NEW YORK TIMES CO MTN BE | NYT | 0.0% | 20.8% | History → |
| AMAZON.COM | AMZN | -1.5% | 9.3% | History → |
| CHARLES SCHWAB CORPORATION (SCHW) | SCHW | -0.7% | 8.5% | History → |
| POST HLDGS INC | POST | -0.2% | 5.9% | History → |
| THERMO FISHER SCIENTIFIC INC | TMO | -0.8% | 1.9% | History → |
Net Portfolio Value ChangeQ1 2026
- $2.4BPrior quarter
- $2.3BCurrent quarter
- $-0.1BNet delta
- -4.7%% change
Methodology & FAQ
How Route One Investment Company, L.P. Quarterly Changes Are Computed
All deltas are sourced from sequential SEC Form 13F-HR filings for Route One Investment Company, L.P.: each row joins the most recent filing against the immediately preceding quarterly filing for the same fund. Share-count changes reflect reported trading activity, while portfolio weights can also move because of market price changes. Portfolio weights are normalized to exclude listed options for comparability. A complete description — including how confidential treatment filings are handled — is documented in the Methodology.
What stocks did Route One Investment Company, L.P. buy in Q1 2026?
In Q1 2026, Route One Investment Company, L.P. initiated 3 new positions (MERCADOLIBRE INC (MELI), GRUPO FINANCIERO GALICIA S.A (GGAL), BANCO MACRO SA (BMA)); bought more shares of KILROY REALTY CORP (KRC), VISTA ENERGY SAB (VIST), VEEVA SYSTEMS (VEEV), GUIDEWIRE SOFTWARE INC (GWRE), BBB FOODS INC (TBBB) — the largest 5 of 7 adds.
What stocks did Route One Investment Company, L.P. sell in Q1 2026?
In Q1 2026, Route One Investment Company, L.P. reduced holdings in ESSEX PPTY TR INC (ESS), NEW YORK TIMES CO MTN BE (NYT), AMAZON.COM (AMZN), CHARLES SCHWAB CORPORATION (SCHW) (SCHW), POST HLDGS INC (POST) — the largest 5 of 6 reductions.
Which positions did Route One Investment Company, L.P. initiate in Q1 2026?
Route One Investment Company, L.P. established 3 new positions in Q1 2026: MERCADOLIBRE INC (MELI, 3.4%), GRUPO FINANCIERO GALICIA S.A (GGAL, 1.2%), BANCO MACRO SA (BMA, 1.1%).
Which existing positions saw the largest allocation increases for Route One Investment Company, L.P. in Q1 2026?
Of 7 existing positions with share-count increases in Q1 2026, the largest were: KILROY REALTY CORP (KRC, +0.4% weight, +38.0% shares), VISTA ENERGY SAB (VIST, +1.9% weight, +18.8% shares), VEEVA SYSTEMS (VEEV, +-0.0% weight, +17.5% shares), GUIDEWIRE SOFTWARE INC (GWRE, +-1.9% weight, +10.7% shares), BBB FOODS INC (TBBB, +0.4% weight, +10.4% shares), UNITEDHEALTH GROUP (UNH, +-0.7% weight, +5.0% shares), HERBALIFE LTD (HLF, +0.9% weight, +0.8% shares).
Which positions did Route One Investment Company, L.P. fully exit in Q1 2026?
Route One Investment Company, L.P. fully exited no positions in Q1 2026.
Which existing positions saw the largest allocation reductions for Route One Investment Company, L.P. in Q1 2026?
Of 6 existing positions with share-count reductions in Q1 2026, the largest were: ESSEX PPTY TR INC (ESS, -2.7% weight, -44.1% shares), NEW YORK TIMES CO MTN BE (NYT, 0.0% weight, -20.8% shares), AMAZON.COM (AMZN, -1.5% weight, -9.3% shares), CHARLES SCHWAB CORPORATION (SCHW) (SCHW, -0.7% weight, -8.5% shares), POST HLDGS INC (POST, -0.2% weight, -5.9% shares), THERMO FISHER SCIENTIFIC INC (TMO, -0.8% weight, -1.9% shares).
Do quarter-over-quarter 13F allocation changes constitute explicit trading signals?
No. Quarter-over-quarter changes reflect a combination of active trading and market price movement. A weight increase can result from price appreciation alone, without the manager adding shares. Share-count delta is the cleaner indicator of explicit trading activity. All deltas on this page are sourced from sequential SEC Form 13F-HR filings.