CSS LLC
- SEC CIK
- 0001103646
- Latest filing
- Aug 14, 2026
Holdings changes from Q1 2021 to Q2 2021
Long positions only; new, added, reduced and sold out are based on share counts. Pick any two quarters this institution filed.
- New
- 322
- Est. +$453.5M
- Added
- 103
- Est. +$78.1M
- Reduced
- 264
- Est. −$321.3M
- Sold out
- 192
- Est. −$310.6M
Portfolio value went from $1.86B to $1.89B (+$31.4M (+1.7%)); positions from 704 to 834 (+130).
All Q2 2021 holdingsAll Q1 2021 holdings
In the shares, value and % of portfolio columns, the top figure is Q2 2021 and the gray one below is Q1 2021. For stocks that split between the two quarters, Q1 2021 shares are converted at the split ratio before comparing.
| Security | Action | Shares | Share change | Value | Est. bought or sold | % of portfolio | Weight change (pp) |
|---|---|---|---|---|---|---|---|
| Dexcom Inc252131AH0 | –– | –– | – | $101.3M$74.9M | – | 5.4%4.0% | +1.33 |
| Wayfair Inc.94419LAD3 | –– | –– | – | $82.6M$82.7M | – | 4.4%4.5% | −0.08 |
| Chegg, Inc163092AD1 | –– | –– | – | $42.0M$38.2M | – | 2.2%2.1% | +0.17 |
| GFL Environmental Inc.36168Q120 | Reduced– | 555,810699,732 | −143,922−20.6% | $41.4M$57.2M | −$10.7M | 2.2%3.1% | −0.89 |
| Nextera Energy Inc65339F796 | Reduced– | 664,618843,111 | −178,493−21.2% | $37.1M$48.6M | −$9.98M | 2.0%2.6% | −0.65 |
| Slack Technologies, Inc.83088VAB8 | New– | –0 | – | $36.9M$0 | +$36.9M | 2.0%0.0% | +1.95 |
| Square Inc852234AD5 | –– | –– | – | $35.2M$32.9M | – | 1.9%1.8% | +0.10 |
| Liberty Media Corp Del530715AN1 | –– | –– | – | $33.2M$29.6M | – | 1.8%1.6% | +0.16 |
| Plug Power Inc72919PAD5 | New– | –0 | – | $32.1M$0 | +$32.1M | 1.7%0.0% | +1.70 |
| Istar Inc45031UCB5 | –– | –– | – | $31.2M$21.9M | – | 1.7%1.2% | +0.47 |
| II-VI Inc902104AB4 | –– | –– | – | $29.6M$20.6M | – | 1.6%1.1% | +0.46 |
| Transocean Ltd.893830BT5 | –– | –– | – | $26.1M$18.1M | – | 1.4%1.0% | +0.41 |
| Zynga Inc98986TAB4 | –– | –– | – | $24.0M$15.8M | – | 1.3%0.9% | +0.42 |
| PG&E Corp69331C140 | Reduced– | 230,648450,276 | −219,628−48.8% | $23.3M$51.6M | −$22.2M | 1.2%2.8% | −1.54 |
| Nuance Communications, Inc.67020YAN0 | New– | –0 | – | $21.1M$0 | +$21.1M | 1.1%0.0% | +1.12 |
| J2 Global Inc48123VAC6 | –– | –– | – | $20.3M$3.86M | – | 1.1%0.2% | +0.87 |
| Rambus Inc750917AG1 | –– | –– | – | $19.0M$16.6M | – | 1.0%0.9% | +0.11 |
| PRAHPRA Health Sciences, Inc. | AddedHistory | 107,58514,062 | +93,523+665.1% | $17.8M$2.16M | +$15.5M | 0.9%0.1% | +0.83 |
| Avaya Hldgs Corp05351XAB7 | –– | –– | – | $17.1M$12.0M | – | 0.9%0.6% | +0.26 |
| Guess Inc401617AD7 | –– | –– | – | $17.1M$15.3M | – | 0.9%0.8% | +0.08 |
| Novavax Inc670002AB0 | –– | –– | – | $16.6M$17.5M | – | 0.9%0.9% | −0.07 |
| Proofpoint Inc743424AF0 | New– | –0 | – | $16.5M$0 | +$16.5M | 0.9%0.0% | +0.88 |
| Two HBRS Invt Corp90187BAB7 | –– | –– | – | $16.4M$12.0M | – | 0.9%0.6% | +0.22 |
| AALAmerican Airlines Group Inc. | ReducedHistory | 725,9742,778,370 | −2,052,396−73.9% | $15.4M$66.4M | −$43.5M | 0.8%3.6% | −2.76 |
| Colfax Corp194014205 | Reduced– | 78,477343,318 | −264,841−77.1% | $14.7M$62.0M | −$49.6M | 0.8%3.3% | −2.56 |
| DTEDte Energy Co | NewHistory | 99,9770 | +99,977 | $13.0M$0 | +$13.0M | 0.7%0.0% | +0.69 |
| Hannon Armstrong Sust Infr C41068XAB6 | –– | –– | – | $12.7M$9.60M | – | 0.7%0.5% | +0.16 |
| MongoDB, Inc.60937PAD8 | –– | –– | – | $12.6M$7.22M | – | 0.7%0.4% | +0.28 |
| Zillow Group, Inc.98954MAC5 | New– | –0 | – | $12.5M$0 | +$12.5M | 0.7%0.0% | +0.66 |
| Insight Enterprises Inc45765UAB9 | –– | –– | – | $12.4M$6.27M | – | 0.7%0.3% | +0.32 |
| Atlas Air Worldwide Hldgs IN049164BH8 | –– | –– | – | $12.1M$15.0M | – | 0.6%0.8% | −0.17 |
| Encore Cap Group Inc292554AK8 | –– | –– | – | $11.8M$4.59M | – | 0.6%0.2% | +0.38 |
| Coupa Software Inc22266LAC0 | –– | –– | – | $11.8M$8.51M | – | 0.6%0.5% | +0.17 |
| Brookfield Property Partrs LG16249107 | New– | 619,3560 | +619,356 | $11.7M$0 | +$11.7M | 0.6%0.0% | +0.62 |
| Lumentum Hldgs Inc55024UAB5 | New– | –0 | – | $11.7M$0 | +$11.7M | 0.6%0.0% | +0.62 |
| Ironwood Pharmaceuticals Inc46333XAD0 | –– | –– | – | $11.0M$10.9M | – | 0.6%0.6% | 0.00 |
| Osi Systems Inc671044AD7 | –– | –– | – | $10.7M$8.09M | – | 0.6%0.4% | +0.13 |
| CNX Res Corp12653CAG3 | New– | –0 | – | $10.7M$0 | +$10.7M | 0.6%0.0% | +0.57 |
| TSLATesla, Inc. | ReducedHistory | 15,23926,368 | −11,129−42.2% | $10.4M$17.6M | −$7.56M | 0.5%0.9% | −0.40 |
| EQT Corp26884LAK5 | New– | –0 | – | $10.1M$0 | +$10.1M | 0.5%0.0% | +0.54 |
| MIECohen & Steers MLP Income & Energy Opportunity Fund | AddedHistory | 2,464,4571,607,973 | +856,484+53.3% | $10.0M$5.15M | +$3.49M | 0.5%0.3% | +0.25 |
| Integra Lifesciences Hldgs C457985AM1 | –– | –– | – | $9.88M$5.61M | – | 0.5%0.3% | +0.22 |
| Centennial Resource Dev Inc15136AAA0 | –– | –– | – | $9.59M$4.79M | – | 0.5%0.3% | +0.25 |
| Fluidigm Corp Del34385PAF5 | –– | –– | – | $9.03M$7.07M | – | 0.5%0.4% | +0.10 |
| PEOAdams Natural Resources Fund, Inc. | ReducedHistory | 538,174582,259 | −44,085−7.6% | $8.72M$8.56M | −$714.1K | 0.5%0.5% | 0.00 |
| Green Plains Inc.393222AF1 | –– | –– | – | $8.47M$4.43M | – | 0.4%0.2% | +0.21 |
| EXEExpand Energy Corp | ReducedHistory | 159,351195,435 | −36,084−18.5% | $8.27M$8.48M | −$1.87M | 0.4%0.5% | −0.02 |
| 2U, LLC90214JAB7 | New– | –0 | – | $8.23M$0 | +$8.23M | 0.4%0.0% | +0.44 |
| Helix Energy Solutions Grp I42330PAK3 | –– | –– | – | $7.77M$7.69M | – | 0.4%0.4% | 0.00 |
| PTC Therapeutics, Inc.69366JAB7 | –– | –– | – | $7.54M$8.06M | – | 0.4%0.4% | −0.03 |
| STEWSRH Total Return Fund, Inc. | ReducedHistory | 554,714629,811 | −75,097−11.9% | $7.51M$7.92M | −$1.02M | 0.4%0.4% | −0.03 |
| Akamai Technologies Inc00971TAJ0 | New– | –0 | – | $7.33M$0 | +$7.33M | 0.4%0.0% | +0.39 |
| Liberty Media Corp Del531229607 | Added– | 156,17875,467 | +80,711+106.9% | $7.25M$3.33M | +$3.74M | 0.4%0.2% | +0.20 |
| VRTXVertex Pharmaceuticals Inc | NewHistory | 32,3160 | +32,316 | $6.52M$0 | +$6.52M | 0.3%0.0% | +0.35 |
| INFOIHS Markit Ltd. | NewHistory | 57,6610 | +57,661 | $6.50M$0 | +$6.50M | 0.3%0.0% | +0.34 |
| BRWSaba Capital Income & Opportunities Fund | NewHistory | 1,373,9980 | +1,373,998 | $6.47M$0 | +$6.47M | 0.3%0.0% | +0.34 |
| Green Plains Inc.393222AK0 | –– | –– | – | $6.44M$7.86M | – | 0.3%0.4% | −0.08 |
| Fti Consulting, Inc302941AP4 | –– | –– | – | $6.43M$6.59M | – | 0.3%0.4% | −0.01 |
| Change Healthcare Inc.15912K209 | Added– | 83,77034,185 | +49,585+145.0% | $6.42M$2.54M | +$3.80M | 0.3%0.1% | +0.20 |
| LBRDALiberty Broadband Corp | AddedHistory | 35,63924,639 | +11,000+44.6% | $5.99M$3.58M | +$1.85M | 0.3%0.2% | +0.12 |
| Nuvasive Inc670704AL9 | New– | –0 | – | $5.75M$0 | +$5.75M | 0.3%0.0% | +0.30 |
| Khosla Ventures Acqut Co III482506102 | Added– | 571,425511,599 | +59,826+11.7% | $5.64M$5.09M | +$590.5K | 0.3%0.3% | +0.02 |
| iShares Tr46432F388 | Reduced– | 53,00066,600 | −13,600−20.4% | $5.57M$6.82M | −$1.43M | 0.3%0.4% | −0.07 |
| CCLCarnival Corp Ltd. | UnchangedHistory | 209,801209,801 | 00.0% | $5.53M$5.57M | $0 | 0.3%0.3% | −0.01 |
| South Jersey Inds Inc838518306 | Added– | 97,33015,046 | +82,284+546.9% | $5.40M$747.0K | +$4.56M | 0.3%<0.1% | +0.25 |
| Chesapeake Energy Corp165167164 | Added– | 200,818135,569 | +65,249+48.1% | $5.40M$2.72M | +$1.75M | 0.3%0.1% | +0.14 |
| Qad Inc74727D207 | Added– | 61,88659,922 | +1,964+3.3% | $5.33M$2.59M | +$169.3K | 0.3%0.1% | +0.14 |
| MPCMarathon Petroleum Corp | AddedHistory | 85,9154,000 | +81,915+2,047.9% | $5.19M$214.0K | +$4.95M | 0.3%<0.1% | +0.26 |
| Khosla Ventures Acqustn Co I482505104 | Added– | 505,381348,977 | +156,404+44.8% | $5.02M$3.52M | +$1.55M | 0.3%0.2% | +0.08 |
| TLNDTalend S.A. | AddedHistory | 76,46318,202 | +58,261+320.1% | $5.02M$1.16M | +$3.82M | 0.3%0.1% | +0.20 |
| Okta, Inc.679295AD7 | New– | –0 | – | $4.95M$0 | +$4.95M | 0.3%0.0% | +0.26 |
| Silicon Laboratories Inc.826919AD4 | New– | –0 | – | $4.86M$0 | +$4.86M | 0.3%0.0% | +0.26 |
| Jaws Hurricane Acquisitn Cor47201B202 | New– | 477,3510 | +477,351 | $4.80M$0 | +$4.80M | 0.3%0.0% | +0.25 |
| TBCPThunder Bridge Capital Partners III Inc. | NewHistory | 491,7090 | +491,709 | $4.77M$0 | +$4.77M | 0.3%0.0% | +0.25 |
| BIO.BBio-Rad Laboratories, Inc. | UnchangedHistory | 7,3757,375 | 00.0% | $4.75M$4.21M | $0 | 0.3%0.2% | +0.02 |
| Apellis Pharmaceuticals, Inc.03753UAB2 | New– | –0 | – | $4.65M$0 | +$4.65M | 0.2%0.0% | +0.25 |
| PCGPG&E Corp | ReducedHistory | 445,120621,320 | −176,200−28.4% | $4.53M$7.28M | −$1.79M | 0.2%0.4% | −0.15 |
| Liberty Media Corp531229409 | Reduced– | 95,718177,721 | −82,003−46.1% | $4.46M$7.83M | −$3.82M | 0.2%0.4% | −0.19 |
| Atlas Air Worldwide Hldgs IN049164BJ4 | –– | –– | – | $4.45M$1.82M | – | 0.2%0.1% | +0.14 |
| SWZTotal Return Securities Fund | ReducedHistory | 455,505461,919 | −6,414−1.4% | $4.43M$4.06M | −$62.4K | 0.2%0.2% | +0.02 |
| Lumentum Hldgs Inc55024UAD1 | –– | –– | – | $4.34M$4.79M | – | 0.2%0.3% | −0.03 |
| Khosla Ventures Acquisition482504107 | Reduced– | 437,617461,180 | −23,563−5.1% | $4.33M$4.66M | −$233.0K | 0.2%0.3% | −0.02 |
| Gores Guggenheim, Inc.38286Q206 | Added– | 420,356272,182 | +148,174+54.4% | $4.21M$2.70M | +$1.48M | 0.2%0.1% | +0.08 |
| Essential Utils Inc29670G201 | New– | 72,5860 | +72,586 | $4.18M$0 | +$4.18M | 0.2%0.0% | +0.22 |
| Colicity Inc194170106 | New– | 420,1500 | +420,150 | $4.10M$0 | +$4.10M | 0.2%0.0% | +0.22 |
| Neogenomics Inc64049MAA8 | –– | –– | – | $4.07M$8.05M | – | 0.2%0.4% | −0.22 |
| Lazard Growth Acquisition CoG54035129 | Reduced– | 398,025472,982 | −74,957−15.8% | $3.97M$4.73M | −$748.2K | 0.2%0.3% | −0.04 |
| Apollo Strategic GRWT CPTL IG0412A110 | Reduced– | 395,310473,892 | −78,582−16.6% | $3.95M$4.73M | −$785.8K | 0.2%0.3% | −0.05 |
| HIGHartford Insurance Group, Inc. | AddedHistory | 63,50654,806 | +8,700+15.9% | $3.94M$3.66M | +$539.1K | 0.2%0.2% | +0.01 |
| SPYSPDR S&P 500 ETF Trust | NewHistory | 9,0000 | +9,000 | $3.85M$0 | +$3.85M | 0.2%0.0% | +0.20 |
| Vanguard Morningstar Small-Cap Value ETF922908611 | Reduced– | 22,16226,662 | −4,500−16.9% | $3.85M$4.42M | −$781.5K | 0.2%0.2% | −0.03 |
| Pivotal Investment Corp III72582M205 | Reduced– | 384,361427,862 | −43,501−10.2% | $3.84M$4.28M | −$435.1K | 0.2%0.2% | −0.03 |
| Independence Holdings CorpG4761A119 | Added– | 384,174250,027 | +134,147+53.7% | $3.84M$2.50M | +$1.34M | 0.2%0.1% | +0.07 |
| Workiva Inc98139AAB1 | New– | –0 | – | $3.82M$0 | +$3.82M | 0.2%0.0% | +0.20 |
| Periphas Capital Partnering Corp713895209 | Reduced– | 149,584150,084 | −500−0.3% | $3.74M$3.69M | −$12.5K | 0.2%0.2% | 0.00 |
| Dycom Inds Inc267475AB7 | –– | –– | – | $3.70M$7.28M | – | 0.2%0.4% | −0.20 |
| Mason Industrial Technolgy I57520Y205 | Reduced– | 362,184403,700 | −41,516−10.3% | $3.65M$4.01M | −$418.0K | 0.2%0.2% | −0.02 |
| Priveterra Acquisition Corp74275N201 | Reduced– | 364,200514,380 | −150,180−29.2% | $3.63M$5.11M | −$1.50M | 0.2%0.3% | −0.08 |
| Equity Distr Acquisition Cor29465E106 | Reduced– | 364,318467,233 | −102,915−22.0% | $3.59M$4.63M | −$1.01M | 0.2%0.2% | −0.06 |
| One Equity Partners Open WTR68237L204 | Reduced– | 356,520381,226 | −24,706−6.5% | $3.56M$3.80M | −$247.0K | 0.2%0.2% | −0.02 |
Estimated amounts multiply the change in shares by the quarter-end price implied by the filing (market value divided by shares): new positions use this quarter's value and sold-out positions last quarter's; positions reported only as principal (PRN) cannot be estimated. 13F shows only quarter-end holdings, not when trades happened or at what price.