Rubric Capital Management LP 13F: Quarter-over-Quarter Portfolio Changes
Rubric Capital Management LP reported a disclosed portfolio value of approximately $8.2 billion in its latest SEC Form 13F-HR filing for Q1 2026, down 2.4% quarter on quarter. Over the quarter, the fund initiated 15 new positions, bought more shares in 26 holdings, trimmed 14 holdings, and exited 9 positions.
Rubric Capital Management LP's top buy was a new stake in Zoom Communications (ZM) , equal to 1.0% of the disclosed portfolio. Its top sell was Fluor CORP (FLR) . The fund exited the position completely after it had accounted for 2.0% of the previous portfolio.
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 |
|---|---|---|---|
| ZOOM COMMUNICATIONS | ZM | 1.0% | Holders → |
| AMCOR PLC | AMCR | 0.6% | Holders → |
| PROTAGONIST THERAPEUTICS INC | PTGX | 0.6% | Holders → |
| DRIVEN BRANDS HLDGS INC | DRVN | 0.5% | Holders → |
| CALAVO GROWERS INC | CVGW | 0.4% | Holders → |
| VISTANCE NETWORKS INC | VISN | 0.4% | Holders → |
| BIOMARIN PHARMACEUTICALS | BMRN | 0.3% | Holders → |
| MISSION PRODUCE INC | AVO | 0.3% | Holders → |
| VENTURE GLOBAL INC | VG | 0.3% | Holders → |
| ADMA BIOLOGICS INC | ADMA | 0.2% | Holders → |
| DNOW INC (DNOW) | DNOW | 0.2% | Holders → |
| ARDELYX INC | ARDX | 0.1% | Holders → |
| GRUPO AEROMEXICO SAB DE CV | AERO | 0.1% | Holders → |
| EUPRAXIA PHARMACEUTICALS INC | EPRX | 0.1% | Holders → |
| PENNYMAC FINL SVCS INC NEW | PFSI | 0.1% | Holders → |
Top BuysQ1 2026
Showing the top 10 buys among 26 existing positions where the fund bought more shares in Q1 2026. Ranked by portfolio-weight impact, with the percentage of additional shares shown separately.
| Company | Ticker | Portfolio Weight Change | More Shares | History |
|---|---|---|---|---|
| GILDAN ACTIVEWEAR INC | GIL | +0.8% | +444.4% | Holders → |
| ARBUTUS BIOPHARMA CORP | ABUS | +0.3% | +320.6% | Holders → |
| EDGEWELL PERSONAL CARE CO | EPC | +0.8% | +297.2% | Holders → |
| CARTERS INC | CRI | +0.3% | +121.5% | Holders → |
| LIBERTY LATIN AMERICA LTD | LILA | +0.2% | +93.0% | Holders → |
| LIBERTY GLOBAL LTD | LBTYK | +0.5% | +51.3% | Holders → |
| LIBERTY LATIN AMERICA LTD | LILAK | +0.7% | +44.5% | Holders → |
| SCHRODINGER INC | SDGR | +-0.1% | +43.8% | Holders → |
| HELEN OF TROY LTD | HELE | +-0.0% | +42.5% | Holders → |
| PROTHENA CORP PLC | PRTA | +0.2% | +36.0% | Holders → |
Top SellsQ1 2026
Showing the top 10 sells among 14 existing positions where the fund sold shares in Q1 2026. Ranked by portfolio-weight impact. Full exits are listed separately.
| Company | Ticker | Portfolio Weight Change | Shares Sold | History |
|---|---|---|---|---|
| PROTO LABS INC | PRLB | -0.3% | 56.7% | Holders → |
| MANNKIND CORP | MNKD | -0.4% | 51.6% | Holders → |
| COMPASS INC | COMP | -0.5% | 46.5% | Holders → |
| ROIVANT SCIENCES LTD | ROIV | -0.6% | 44.4% | Holders → |
| FTAI AVIATION LTD | FTAI | -1.0% | 30.4% | History → |
| TEVA PHARMACEUTICAL INDS LTD | TEVA | -2.3% | 28.6% | History → |
| VISTRA CORP | VST | -1.1% | 25.0% | History → |
| PRIMO BRANDS CORPORATION | PRMB | -0.1% | 23.3% | Holders → |
| ANDERSONS INC | ANDE | 0.1% | 14.9% | Holders → |
| COLLEGIUM PHARMACEUTICAL INC. | COLL | -0.3% | 14.5% | Holders → |
Full ExitsQ1 2026
Positions present in the prior 13F-HR filing that no longer appear in Q1 2026.
| Company | Ticker | Last-Reported Portfolio Weight |
|---|---|---|
| FLUOR CORP | FLR | 2.0% |
| EOS ENERGY ENTERPRISES INC | EOSE | 0.9% |
| ARCHER DANIELS MIDLAND CO | ADM | 0.8% |
| BUNGE GLOBAL SA | BG | 0.7% |
| GRAPHIC PACKAGING HLDG CO | GPK | 0.4% |
| NEW FORTRESS ENERGY INC | NFE | 0.3% |
| DARLING INGREDIENTS INC | DAR | 0.3% |
| SMURFIT WESTROCK PLC | SW | 0.2% |
| STUBHUB HLDGS INC | STUB | 0.1% |
Net Portfolio Value ChangeQ1 2026
- $8.4BPrior quarter
- $8.2BCurrent quarter
- $-0.2BNet delta
- -2.4%% change
Methodology & FAQ
How Rubric Capital Management LP Quarterly Changes Are Computed
All deltas are sourced from sequential SEC Form 13F-HR filings for Rubric Capital Management LP: 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 Rubric Capital Management LP buy in Q1 2026?
In Q1 2026, Rubric Capital Management LP initiated 15 new positions (ZOOM COMMUNICATIONS (ZM), AMCOR PLC (AMCR), PROTAGONIST THERAPEUTICS INC (PTGX), DRIVEN BRANDS HLDGS INC (DRVN), CALAVO GROWERS INC (CVGW), VISTANCE NETWORKS INC (VISN), BIOMARIN PHARMACEUTICALS (BMRN), MISSION PRODUCE INC (AVO), VENTURE GLOBAL INC (VG), ADMA BIOLOGICS INC (ADMA), DNOW INC (DNOW) (DNOW), ARDELYX INC (ARDX), GRUPO AEROMEXICO SAB DE CV (AERO), EUPRAXIA PHARMACEUTICALS INC (EPRX), PENNYMAC FINL SVCS INC NEW (PFSI)); bought more shares of GILDAN ACTIVEWEAR INC (GIL), ARBUTUS BIOPHARMA CORP (ABUS), EDGEWELL PERSONAL CARE CO (EPC), CARTERS INC (CRI), LIBERTY LATIN AMERICA LTD (LILA) — the largest 5 of 26 adds.
What stocks did Rubric Capital Management LP sell in Q1 2026?
In Q1 2026, Rubric Capital Management LP fully sold 9 positions (FLUOR CORP (FLR), EOS ENERGY ENTERPRISES INC (EOSE), ARCHER DANIELS MIDLAND CO (ADM), BUNGE GLOBAL SA (BG), GRAPHIC PACKAGING HLDG CO (GPK), NEW FORTRESS ENERGY INC (NFE), DARLING INGREDIENTS INC (DAR), SMURFIT WESTROCK PLC (SW), STUBHUB HLDGS INC (STUB)); reduced holdings in PROTO LABS INC (PRLB), MANNKIND CORP (MNKD), COMPASS INC (COMP), ROIVANT SCIENCES LTD (ROIV), FTAI AVIATION LTD (FTAI) — the largest 5 of 14 reductions.
Which positions did Rubric Capital Management LP initiate in Q1 2026?
Rubric Capital Management LP established 15 new positions in Q1 2026: ZOOM COMMUNICATIONS (ZM, 1.0%), AMCOR PLC (AMCR, 0.6%), PROTAGONIST THERAPEUTICS INC (PTGX, 0.6%), DRIVEN BRANDS HLDGS INC (DRVN, 0.5%), CALAVO GROWERS INC (CVGW, 0.4%), VISTANCE NETWORKS INC (VISN, 0.4%), BIOMARIN PHARMACEUTICALS (BMRN, 0.3%), MISSION PRODUCE INC (AVO, 0.3%), VENTURE GLOBAL INC (VG, 0.3%), ADMA BIOLOGICS INC (ADMA, 0.2%), DNOW INC (DNOW) (DNOW, 0.2%), ARDELYX INC (ARDX, 0.1%), GRUPO AEROMEXICO SAB DE CV (AERO, 0.1%), EUPRAXIA PHARMACEUTICALS INC (EPRX, 0.1%), PENNYMAC FINL SVCS INC NEW (PFSI, 0.1%).
Which existing positions saw the largest allocation increases for Rubric Capital Management LP in Q1 2026?
Of 26 existing positions with share-count increases in Q1 2026, the largest were: GILDAN ACTIVEWEAR INC (GIL, +0.8% weight, +444.4% shares), ARBUTUS BIOPHARMA CORP (ABUS, +0.3% weight, +320.6% shares), EDGEWELL PERSONAL CARE CO (EPC, +0.8% weight, +297.2% shares), CARTERS INC (CRI, +0.3% weight, +121.5% shares), LIBERTY LATIN AMERICA LTD (LILA, +0.2% weight, +93.0% shares), LIBERTY GLOBAL LTD (LBTYK, +0.5% weight, +51.3% shares), LIBERTY LATIN AMERICA LTD (LILAK, +0.7% weight, +44.5% shares), SCHRODINGER INC (SDGR, +-0.1% weight, +43.8% shares), HELEN OF TROY LTD (HELE, +-0.0% weight, +42.5% shares), PROTHENA CORP PLC (PRTA, +0.2% weight, +36.0% shares).
Which positions did Rubric Capital Management LP fully exit in Q1 2026?
Rubric Capital Management LP fully exited 9 positions in Q1 2026: FLUOR CORP (FLR, last-reported weight 2.0%), EOS ENERGY ENTERPRISES INC (EOSE, last-reported weight 0.9%), ARCHER DANIELS MIDLAND CO (ADM, last-reported weight 0.8%), BUNGE GLOBAL SA (BG, last-reported weight 0.7%), GRAPHIC PACKAGING HLDG CO (GPK, last-reported weight 0.4%), NEW FORTRESS ENERGY INC (NFE, last-reported weight 0.3%), DARLING INGREDIENTS INC (DAR, last-reported weight 0.3%), SMURFIT WESTROCK PLC (SW, last-reported weight 0.2%), STUBHUB HLDGS INC (STUB, last-reported weight 0.1%).
Which existing positions saw the largest allocation reductions for Rubric Capital Management LP in Q1 2026?
Of 14 existing positions with share-count reductions in Q1 2026, the largest were: PROTO LABS INC (PRLB, -0.3% weight, -56.7% shares), MANNKIND CORP (MNKD, -0.4% weight, -51.6% shares), COMPASS INC (COMP, -0.5% weight, -46.5% shares), ROIVANT SCIENCES LTD (ROIV, -0.6% weight, -44.4% shares), FTAI AVIATION LTD (FTAI, -1.0% weight, -30.4% shares), TEVA PHARMACEUTICAL INDS LTD (TEVA, -2.3% weight, -28.6% shares), VISTRA CORP (VST, -1.1% weight, -25.0% shares), PRIMO BRANDS CORPORATION (PRMB, -0.1% weight, -23.3% shares), ANDERSONS INC (ANDE, 0.1% weight, -14.9% shares), COLLEGIUM PHARMACEUTICAL INC. (COLL, -0.3% weight, -14.5% 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.