David Rosen: Stock Portfolio, Performance and Latest Trades
Rubric Capital Management
13F portfolio value
$10.9B
87 holdings at Q2 2026
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David Rosen's portfolio
As of Q2 2026, filed August 14, 2026 · prices as of October 8, 2026
| Company | Share of portfolio | Average buy price | Return | Current price | Last quarter |
|---|---|---|---|---|---|
| 12.7% | $138.87 | +159% | $359.22 | No change | |
| 7.45% | $140.03 | +22.2% | $171.06 | Added +16% | |
Viatris Inc.VTRS | 4.98% | $10.71 | +62.9% | $17.44 | Added +2.0% |
| 4.84% | $12.55 | +213% | $39.25 | Added +2.1% | |
Golar LNG Ltd.GLNG | 4.20% | $20.06 | +141% | $48.42 | No change |
Vistra Corp.VST | 2.61% | $177.71 | −12.1% | $156.14 | Added +20% |
| 2.57% | $10.80 | +19.4% | $12.89 | Added +14% | |
Fluor Corp.FLR | 2.41% | $48.96 | +4.2% | $51.01 | New |
| 2.35% | $24.96 | +216% | $78.75 | Added +6.7% | |
| 2.33% | $6.28 | +78.7% | $11.23 | Added +2.1% | |
| 2.19% | $90.63 | +4.5% | $94.67 | Added +176% | |
| 2.13% | $59.25 | −29.3% | $41.90 | Added +222% | |
| 1.99% | $10.99 | +123% | $24.49 | No change | |
Amazon.com Inc.AMZN | 1.97% | $251.01 | +1.2% | $254.06 | New |
| 1.95% | $13.33 | +157% | $34.21 | Added +20% | |
Zymeworks Inc.ZYME | 1.68% | $13.09 | +92.9% | $25.26 | No change |
Amcor PLCAMCR | 1.66% | $41.07 | +2.0% | $41.88 | Added +228% |
Cimpress PLCCMPR | 1.63% | $57.73 | +28.7% | $74.28 | Added +7.4% |
| 1.61% | $4.69 | +319% | $19.65 | Reduced −7.9% | |
| 1.61% | $16.12 | +37.8% | $22.21 | Added +192% | |
| 1.51% | $56.17 | +82.1% | $102.29 | Reduced −28% | |
| 1.36% | $87.63 | −30.0% | $61.34 | Added +3006% | |
| 1.28% | $19.34 | −30.7% | $13.41 | No change | |
| 1.25% | $20.31 | +277% | $76.60 | No change | |
Liberty Global Ltd-ALBTYA | 1.23% | $13.51 | −33.9% | $8.93 | No change |
| 1.13% | $7.79 | +34.7% | $10.50 | Added +30% | |
| 1.12% | $23.22 | +33.3% | $30.96 | Added +10% | |
| 1.12% | $7.60 | +14.7% | $8.72 | Added +1.6% | |
Schrodinger Inc.SDGR | 0.95% | $19.56 | +35.0% | $26.39 | Added +6.7% |
Ecovyst Inc.ECVT | 0.94% | $8.01 | +27.5% | $10.21 | Reduced −10% |
Liberty Global Ltd-ALBTYK | 0.93% | $13.36 | −34.5% | $8.75 | No change |
| 0.93% | $8.69 | +9.5% | $9.52 | Added +119% | |
| 0.90% | $5.39 | +6.2% | $5.73 | Added +4.9% | |
| 0.87% | $19.72 | +40.6% | $27.73 | Reduced −11% | |
| 0.79% | $21.23 | +54.0% | $32.71 | Added +38% | |
Ardelyx Inc.ARDX | 0.76% | $6.16 | −46.9% | $3.27 | Added +771% |
Enovis Corp.ENOV | 0.74% | $27.82 | −37.3% | $17.43 | Added +59% |
| 0.72% | $10.41 | −0.7% | $10.33 | Added +416% | |
Mannkind Corp.MNKD | 0.70% | $3.48 | −1.6% | $3.42 | Added +397% |
| 0.68% | $13.68 | −14.0% | $11.77 | Added +77% | |
| 0.66% | $1.28 | +6.8% | $1.37 | No change | |
| 0.65% | $12.83 | −8.1% | $11.79 | Added +246% | |
Adeia Inc.ADEA | 0.64% | $10.18 | +137% | $24.11 | Reduced −50% |
| 0.63% | $5.97 | +15.5% | $6.90 | No change | |
Stratasys Ltd.SSYS | 0.63% | $11.46 | −29.8% | $8.05 | No change |
| 0.63% | $11.78 | −61.3% | $4.56 | Added +6.8% | |
| 0.63% | $52.34 | +27.1% | $66.53 | Added +17% | |
| 0.60% | $18.48 | +4.7% | $19.34 | Reduced −4.0% | |
| 0.59% | $51.29 | −5.6% | $48.40 | New | |
| 0.59% | $8.83 | −30.4% | $6.14 | New | |
| 0.59% | $27.84 | −27.9% | $20.09 | New | |
| 0.55% | $12.12 | +9.7% | $13.29 | Added +261% | |
| 0.54% | $71.84 | −15.6% | $60.61 | New | |
| 0.53% | $49.74 | −75.0% | $12.41 | No change | |
Alvotech SAALVO | 0.53% | $3.57 | +58.6% | $5.67 | New |
| 0.48% | $8.75 | +109% | $18.33 | Added +18% | |
Dnow Inc.DNOW | 0.46% | $13.16 | +18.9% | $15.65 | Added +208% |
| 0.45% | $9.14 | −5.8% | $8.61 | No change | |
| 0.43% | $4.59 | +180% | $12.83 | Reduced −33% | |
| 0.42% | $28.55 | −22.5% | $22.11 | No change | |
| 0.33% | $4.09 | +2.3% | $4.18 | Added +14% | |
Versigent PLCVGNT | 0.33% | $39.85 | +10.8% | $44.16 | New |
Xperi Inc.XPER | 0.31% | $11.24 | −53.3% | $5.25 | No change |
| 0.31% | $18.46 | −51.3% | $9.00 | No change | |
Tripadvisor Inc.TRIP | 0.31% | $11.31 | −20.8% | $8.96 | New |
| 0.28% | $19.41 | −38.9% | $11.86 | No change | |
| 0.27% | $7.58 | +15.7% | $8.77 | Added +0.7% | |
Biohaven Ltd.BHVN | 0.23% | $10.76 | +10.8% | $11.93 | New |
| 0.23% | $18.24 | −67.0% | $6.02 | No change | |
| 0.20% | $80.22 | −10.3% | $71.98 | New | |
Uniqure NVQURE | 0.17% | $46.06 | −51.1% | $22.54 | New |
| 0.14% | $10.97 | +8.3% | $11.88 | New | |
| 0.14% | $28.61 | −21.8% | $22.36 | No change | |
| 0.13% | $38.60 | −21.1% | $30.44 | New | |
| 0.12% | $2.19 | −83.6% | $0.36 | No change | |
Proto Labs Inc.PRLB | 0.08% | $38.16 | +142% | $92.21 | Reduced −78% |
| 0.08% | $18.15 | −13.1% | $15.78 | No change | |
Omeros Corp.OMER | 0.06% | $11.90 | +60.7% | $19.12 | New |
| 0.05% | $7.81 | −3.1% | $7.57 | Added +26% | |
| 0.05% | $2.44 | +50.0% | $3.66 | Reduced −2.6% | |
| 0.04% | $2.37 | −84.2% | $0.375 | No change | |
| 0.03% | $5.49 | −9.7% | $4.96 | New | |
| 0.03% | $34.05 | −4.5% | $32.52 | Reduced −91% | |
| 0.02% | $8.18 | −75.4% | $2.01 | No change | |
Opko Health Inc.Bond68375NAG8 | 0.02% | — | — | — | No change |
| 0.02% | $9.80 | −37.5% | $6.12 | New | |
Service Properties Trust81761L102 | 0.01% | $1.69 | — | — | New |
David Rosen's options
As of Q2 2026. Value = shares the options cover.
| Company | Type | Value of shares covered | Last quarter |
|---|---|---|---|
| Put · bet on a fall or hedge | — | Sold out |
David Rosen's buys and sells
| Company | Action | Shares change | Value now |
|---|---|---|---|
| Sold out | −1,400,000 | — | |
| Sold out | −2,000,000 | — | |
Vistra Corp.VST | New | +2,000,000 | $322.7M |
| New | +670,000 | $236.7M | |
| Reduced −13% | −3,294,490 | $666.5M | |
| Added +10% | +339,447 | $728.3M | |
Viatris Inc.VTRS | Added +66% | +10,115,000 | $317.5M |
| Reduced −55% | −11,000,000 | $195.3M | |
| New | +1,200,000 | $104.7M | |
| Sold out | −3,774,889 | — | |
| New | +7,000,000 | $74M | |
Zymeworks Inc.ZYME | Added +22% | +1,039,449 | $151.4M |
| New | +1,101,583 | $63.3M | |
| New | +3,628,815 | $59.3M | |
| New | +1,005,631 | $53.5M | |
| Reduced −24% | −3,438,061 | $62.2M | |
| New | +2,473,885 | $46.9M | |
| Added +259% | +488,163 | $60.3M | |
| Reduced −37% | −3,800,000 | $74.5M | |
| Reduced −23% | −2,477,880 | $240.2M | |
Alight Inc. - Class A01626W101 | Sold out | −11,398,583 | — |
| Sold out | −343,414 | — | |
Schrodinger Inc.SDGR | Reduced −21% | −1,097,319 | $74.6M |
| Reduced −56% | −4,765,111 | $47.2M | |
| New | +2,000,000 | $30.1M | |
| Reduced −47% | −1,330,062 | $69.3M | |
| Sold out | −5,101,886 | — | |
| Reduced −19% | −860,581 | $107.9M | |
| Sold out | −595,366 | — | |
New Fortress Energy Inc.644393100 | Reduced −4.3% | −1,065,688 | $27M |
Cimpress PLCCMPR | Added +29% | +344,211 | $101.5M |
| Added +38% | +1,700,000 | $72.2M | |
| Sold out | −4,529,783 | — | |
Fluor Corp.FLR | Reduced −7.9% | −356,192 | $164.2M |
| New | +680,827 | $24.5M | |
| Sold out | −1,319,589 | — | |
Day One Biopharmaceuticals I23954D109 | Sold out | −3,377,071 | — |
Stratasys Ltd.SSYS | Reduced −5.9% | −463,071 | $63.7M |
Liberty Global Ltd-ALBTYA | Added +29% | +2,268,065 | $111.6M |
| Added +139% | +2,136,958 | $35.1M | |
Mannkind Corp.MNKD | Reduced −35% | −3,938,176 | $42.4M |
| Added +66% | +2,448,880 | $49.1M | |
Enovis Corp.ENOV | Reduced −11% | −296,735 | $65.4M |
| Reduced −17% | −671,347 | $137.3M | |
| Added +17% | +3,000,000 | $187.5M | |
| New | +1,007,071 | $17.2M | |
| New | +675,000 | $16.5M | |
| New | +400,000 | $15.5M | |
| Reduced −23% | −250,000 | $12.1M | |
| New | +460,000 | $14.9M | |
Liberty Global Ltd-ALBTYK | Added +35% | +1,583,012 | $67.6M |
| Added +1.3% | +100,000 | $96.3M | |
| Added +16% | +250,000 | $75.9M | |
| Added +204% | +172,146 | $16M | |
Ecovyst Inc.ECVT | Added +1.0% | +100,000 | $102.2M |
| Sold out | −85,726 | — | |
| New | +784,854 | $10.6M | |
Indivior PLCG4766E116 | Reduced −56% | −632,434 | $17.9M |
| Added +3.9% | +400,000 | $79.5M | |
| Added +11% | +1,832,874 | $224.8M | |
| New | +256,937 | $5.5M | |
| Added +17% | +500,000 | $56.2M | |
| Added +3.3% | +946,100 | $39.1M | |
| Sold out | −70,372 | — | |
| Added +11% | +200,000 | $14.4M |
David Rosen's portfolio by sector
Share of the stock portfolio at Q2 2026.
| Sector | Share |
|---|---|
| Health Care | 33% |
| Utilities | 19% |
| Industrials | 16% |
| Consumer Discretionary | 7.3% |
| Communication Services | 5.8% |
| Financials | 5.8% |
| Technology | 3.8% |
| Materials | 2.7% |
| Consumer Staples | 2.1% |
| Real Estate | 1.9% |
| Energy | 1.3% |
| Other | 0.7% |
Portfolio performance: David Rosen vs. benchmarks
Your result if you had bought each reported portfolio on the day it was made public and held it until the next report, against the S&P 500 and Nasdaq-100.
- You, copying after each 13F filing – estimated value
- S&P 500
- Nasdaq-100
| Total return | Per year | |
|---|---|---|
| You, copying after each 13F filing – estimated value | +115.0% | +16.5% |
| S&P 500 | +89.0% | +13.6% |
| Nasdaq-100 | +113.3% | +16.4% |
Prices were available for 68% of the portfolio value on average; the rest is left out of the return.
David Rosen's most traded stocks
Quarters with a buy or a sell, all reports since Q4 2016.
| Company | Quarters bought | Quarters sold |
|---|---|---|
| 9 | 13 | |
Liberty Global Ltd-ALBTYA | 16 | 4 |
| 12 | 8 | |
| 15 | 4 | |
Fluor Corp.FLR | 9 | 9 |
Aar Corp.AIR | 7 | 11 |
| 8 | 9 | |
| 8 | 8 | |
| 8 | 8 | |
| 7 | 9 | |
| 10 | 6 | |
| 10 | 5 | |
Schrodinger Inc.SDGR | 11 | 4 |
| 8 | 7 | |
| 11 | 4 |