CSS LLC
- SEC CIK
- 0001103646
- Latest filing
- Aug 14, 2026
Holdings changes from Q2 2021 to Q3 2021
Long positions only; new, added, reduced and sold out are based on share counts. Pick any two quarters this institution filed.
- New
- 339
- Est. +$409.8M
- Added
- 201
- Est. +$133.8M
- Reduced
- 175
- Est. −$154.6M
- Sold out
- 240
- Est. −$404.8M
Portfolio value went from $1.89B to $1.88B (−$10.5M (−0.6%)); positions from 834 to 933 (+99).
All Q3 2021 holdingsAll Q2 2021 holdings
In the shares, value and % of portfolio columns, the top figure is Q3 2021 and the gray one below is Q2 2021. For stocks that split between the two quarters, Q2 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 | –– | –– | – | $129.4M$101.3M | – | 6.9%5.4% | +1.53 |
| Wayfair Inc.94419LAD3 | –– | –– | – | $67.8M$82.6M | – | 3.6%4.4% | −0.76 |
| Nextera Energy Inc65339F796 | Added– | 782,410664,618 | +117,792+17.7% | $45.7M$37.1M | +$6.88M | 2.4%2.0% | +0.47 |
| Antero Resources Corp03674XAM8 | New– | –0 | – | $45.1M$0 | +$45.1M | 2.4%0.0% | +2.41 |
| Chegg, Inc163092AD1 | –– | –– | – | $36.4M$42.0M | – | 1.9%2.2% | −0.29 |
| Liberty Media Corp Del530715AN1 | –– | –– | – | $35.6M$33.2M | – | 1.9%1.8% | +0.14 |
| Istar Inc45031UCB5 | –– | –– | – | $33.9M$31.2M | – | 1.8%1.7% | +0.15 |
| Neurocrine Biosciences Inc64125CAD1 | New– | –0 | – | $28.2M$0 | +$28.2M | 1.5%0.0% | +1.50 |
| Novavax Inc670002AB0 | –– | –– | – | $28.1M$16.6M | – | 1.5%0.9% | +0.62 |
| II-VI Inc902104AB4 | –– | –– | – | $24.9M$29.6M | – | 1.3%1.6% | −0.24 |
| Plug Power Inc72919PAD5 | –– | –– | – | $24.0M$32.1M | – | 1.3%1.7% | −0.42 |
| Insight Enterprises Inc45765UAB9 | –– | –– | – | $22.6M$12.4M | – | 1.2%0.7% | +0.55 |
| Nuance Communications, Inc.67020YAN0 | –– | –– | – | $21.3M$21.1M | – | 1.1%1.1% | +0.02 |
| Transocean Ltd.893830BT5 | –– | –– | – | $20.7M$26.1M | – | 1.1%1.4% | −0.28 |
| PG&E Corp69331C140 | Reduced– | 214,260230,648 | −16,388−7.1% | $20.6M$23.3M | −$1.57M | 1.1%1.2% | −0.14 |
| Evolent Health, Inc.30050BAF8 | New– | –0 | – | $19.5M$0 | +$19.5M | 1.0%0.0% | +1.04 |
| Silicon Laboratories Inc.826919AD4 | –– | –– | – | $18.3M$4.86M | – | 1.0%0.3% | +0.72 |
| Rambus Inc750917AG1 | –– | –– | – | $18.2M$19.0M | – | 1.0%1.0% | −0.03 |
| GFL Environmental Inc.36168Q120 | Reduced– | 211,476555,810 | −344,334−62.0% | $18.1M$41.4M | −$29.4M | 1.0%2.2% | −1.23 |
| Zscaler, Inc.98980GAB8 | New– | –0 | – | $15.7M$0 | +$15.7M | 0.8%0.0% | +0.84 |
| Avaya Hldgs Corp05351XAB7 | –– | –– | – | $15.6M$17.1M | – | 0.8%0.9% | −0.07 |
| Guess Inc401617AD7 | –– | –– | – | $15.1M$17.1M | – | 0.8%0.9% | −0.10 |
| AALAmerican Airlines Group Inc. | ReducedHistory | 716,209725,974 | −9,765−1.3% | $14.7M$15.4M | −$200.4K | 0.8%0.8% | −0.03 |
| Encore Cap Group Inc292554AK8 | –– | –– | – | $14.4M$11.8M | – | 0.8%0.6% | +0.14 |
| Two HBRS Invt Corp90187BAB7 | –– | –– | – | $13.7M$16.4M | – | 0.7%0.9% | −0.14 |
| Atlas Air Worldwide Hldgs IN049164BH8 | –– | –– | – | $13.1M$12.1M | – | 0.7%0.6% | +0.06 |
| Omnicell Com68213NAD1 | New– | –0 | – | $12.9M$0 | +$12.9M | 0.7%0.0% | +0.69 |
| 2U, LLC90214JAB7 | –– | –– | – | $12.5M$8.23M | – | 0.7%0.4% | +0.23 |
| Palo Alto Networks Inc697435AF2 | New– | –0 | – | $12.3M$0 | +$12.3M | 0.7%0.0% | +0.66 |
| Akamai Technologies Inc00971TAJ0 | –– | –– | – | $12.3M$7.33M | – | 0.7%0.4% | +0.27 |
| Green Plains Inc.393222AK0 | –– | –– | – | $11.8M$6.44M | – | 0.6%0.3% | +0.29 |
| Lumentum Hldgs Inc55024UAB5 | –– | –– | – | $11.8M$11.7M | – | 0.6%0.6% | +0.01 |
| TSLATesla, Inc. | ReducedHistory | 14,83915,239 | −400−2.6% | $11.5M$10.4M | −$310.2K | 0.6%0.5% | +0.06 |
| Atlas Air Worldwide Hldgs IN049164BJ4 | –– | –– | – | $11.0M$4.45M | – | 0.6%0.2% | +0.35 |
| Ironwood Pharmaceuticals Inc46333XAD0 | –– | –– | – | $10.9M$11.0M | – | 0.6%0.6% | 0.00 |
| MIDDLEBY Corp596278AB7 | New– | –0 | – | $10.7M$0 | +$10.7M | 0.6%0.0% | +0.57 |
| Osi Systems Inc671044AD7 | –– | –– | – | $10.4M$10.7M | – | 0.6%0.6% | −0.01 |
| Live Nation Entertainment IN538034AQ2 | New– | –0 | – | $10.1M$0 | +$10.1M | 0.5%0.0% | +0.54 |
| First Majestic Silver Corp32076VAB9 | New– | –0 | – | $9.60M$0 | +$9.60M | 0.5%0.0% | +0.51 |
| Fluidigm Corp Del34385PAF5 | –– | –– | – | $9.28M$9.03M | – | 0.5%0.5% | +0.02 |
| VRTXVertex Pharmaceuticals Inc | AddedHistory | 49,06032,316 | +16,744+51.8% | $8.90M$6.52M | +$3.04M | 0.5%0.3% | +0.13 |
| EXEExpand Energy Corp | ReducedHistory | 142,991159,351 | −16,360−10.3% | $8.81M$8.27M | −$1.01M | 0.5%0.4% | +0.03 |
| EQT Corp26884LAK5 | –– | –– | – | $8.39M$10.1M | – | 0.4%0.5% | −0.09 |
| PEOAdams Natural Resources Fund, Inc. | ReducedHistory | 533,375538,174 | −4,799−0.9% | $8.37M$8.72M | −$75.3K | 0.4%0.5% | −0.02 |
| Green Plains Inc.393222AF1 | –– | –– | – | $8.37M$8.47M | – | 0.4%0.4% | 0.00 |
| Helix Energy Solutions Grp I42330PAK3 | –– | –– | – | $8.24M$7.77M | – | 0.4%0.4% | +0.03 |
| Chesapeake Energy Corp165167164 | Added– | 216,684200,818 | +15,866+7.9% | $7.90M$5.40M | +$578.7K | 0.4%0.3% | +0.14 |
| SPYSPDR S&P 500 ETF Trust | AddedHistory | 18,0009,000 | +9,000+100.0% | $7.72M$3.85M | +$3.86M | 0.4%0.2% | +0.21 |
| Centennial Resource Dev Inc15136AAA0 | –– | –– | – | $7.54M$9.59M | – | 0.4%0.5% | −0.11 |
| PTC Therapeutics, Inc.69366JAB7 | –– | –– | – | $7.31M$7.54M | – | 0.4%0.4% | −0.01 |
| STEWSRH Total Return Fund, Inc. | UnchangedHistory | 554,714554,714 | 00.0% | $7.27M$7.51M | $0 | 0.4%0.4% | −0.01 |
| Insulet Corp45784PAK7 | New– | –0 | – | $7.19M$0 | +$7.19M | 0.4%0.0% | +0.38 |
| Cryolife Inc228903AB6 | New– | –0 | – | $6.74M$0 | +$6.74M | 0.4%0.0% | +0.36 |
| Okta, Inc.679295AD7 | –– | –– | – | $6.27M$4.95M | – | 0.3%0.3% | +0.07 |
| INFOIHS Markit Ltd. | ReducedHistory | 52,75857,661 | −4,903−8.5% | $6.15M$6.50M | −$571.8K | 0.3%0.3% | −0.02 |
| XECCimarex Energy Co | AddedHistory | 70,5413,000 | +67,541+2,251.4% | $6.15M$217.0K | +$5.89M | 0.3%<0.1% | +0.32 |
| LBRDALiberty Broadband Corp | ReducedHistory | 35,34035,639 | −299−0.8% | $5.95M$5.99M | −$50.3K | 0.3%0.3% | 0.00 |
| CNX Res Corp12653CAG3 | –– | –– | – | $5.90M$10.7M | – | 0.3%0.6% | −0.25 |
| Change Healthcare Inc.15912K209 | Reduced– | 80,73083,770 | −3,040−3.6% | $5.63M$6.42M | −$211.9K | 0.3%0.3% | −0.04 |
| RBC Bearings INC75524B203 | New– | 50,6780 | +50,678 | $5.59M$0 | +$5.59M | 0.3%0.0% | +0.30 |
| BIO.BBio-Rad Laboratories, Inc. | UnchangedHistory | 7,3757,375 | 00.0% | $5.50M$4.75M | $0 | 0.3%0.3% | +0.04 |
| Nabors Inds Inc New62957HAB1 | –– | –– | – | $5.41M$2.68M | – | 0.3%0.1% | +0.15 |
| Khosla Ventures Acqut Co III482506102 | Reduced– | 545,424571,425 | −26,001−4.6% | $5.34M$5.64M | −$254.8K | 0.3%0.3% | −0.01 |
| Macquarie Infrastructure Cor55608B105 | Added– | 130,51617,000 | +113,516+667.7% | $5.29M$651.0K | +$4.60M | 0.3%<0.1% | +0.25 |
| BHP Group Ltd05545E209 | Added– | 104,2413,541 | +100,700+2,843.8% | $5.28M$212.0K | +$5.10M | 0.3%<0.1% | +0.27 |
| Liberty Media Corp Del531229607 | Reduced– | 108,549156,178 | −47,629−30.5% | $5.15M$7.25M | −$2.26M | 0.3%0.4% | −0.11 |
| CITCit Group Inc | AddedHistory | 98,46558,904 | +39,561+67.2% | $5.12M$3.04M | +$2.06M | 0.3%0.2% | +0.11 |
| Argus Capital Corp04026L204 | New– | 492,1870 | +492,187 | $4.97M$0 | +$4.97M | 0.3%0.0% | +0.26 |
| Theravance Inc88338TAB0 | New– | –0 | – | $4.79M$0 | +$4.79M | 0.3%0.0% | +0.26 |
| TBCPThunder Bridge Capital Partners III Inc. | ReducedHistory | 491,085491,709 | −624−0.1% | $4.79M$4.77M | −$6.09K | 0.3%0.3% | 0.00 |
| Liberty Media Corp531229409 | Added– | 100,25195,718 | +4,533+4.7% | $4.73M$4.46M | +$213.8K | 0.3%0.2% | +0.02 |
| Evolent Health, Inc.30050BAD3 | New– | –0 | – | $4.58M$0 | +$4.58M | 0.2%0.0% | +0.24 |
| Chesapeake Energy Corp165167172 | Added– | 139,459128,159 | +11,300+8.8% | $4.55M$3.13M | +$368.9K | 0.2%0.2% | +0.08 |
| Pegasystems Inc705573AB9 | New– | –0 | – | $4.51M$0 | +$4.51M | 0.2%0.0% | +0.24 |
| HIGHartford Insurance Group, Inc. | UnchangedHistory | 63,50663,506 | 00.0% | $4.46M$3.94M | $0 | 0.2%0.2% | +0.03 |
| MOAltria Group, Inc. | AddedHistory | 97,70015,000 | +82,700+551.3% | $4.45M$715.0K | +$3.76M | 0.2%<0.1% | +0.20 |
| SPESpecial Opportunities Fund, Inc. | AddedHistory | 286,39699,786 | +186,610+187.0% | $4.40M$1.51M | +$2.87M | 0.2%0.1% | +0.15 |
| iShares Russell 1000 Value ETF464287598 | Added– | 28,00017,900 | +10,100+56.4% | $4.38M$2.84M | +$1.58M | 0.2%0.2% | +0.08 |
| CCLCarnival Corp Ltd. | ReducedHistory | 174,364209,801 | −35,437−16.9% | $4.36M$5.53M | −$886.3K | 0.2%0.3% | −0.06 |
| Decarbonization Plus Acquisition Corp IVG2773W129 | New– | 431,6750 | +431,675 | $4.36M$0 | +$4.36M | 0.2%0.0% | +0.23 |
| Khosla Ventures Acquisition482504107 | Reduced– | 429,306437,617 | −8,311−1.9% | $4.24M$4.33M | −$82.0K | 0.2%0.2% | 0.00 |
| Colicity Inc194170106 | Added– | 432,545420,150 | +12,395+3.0% | $4.22M$4.10M | +$121.1K | 0.2%0.2% | +0.01 |
| Kensington Capital AcquisitiG5251K111 | New– | 409,1860 | +409,186 | $4.17M$0 | +$4.17M | 0.2%0.0% | +0.22 |
| HIIIHudson Executive Investment Corp. III | AddedHistory | 426,80711,456 | +415,351+3,625.6% | $4.15M$112.0K | +$4.04M | 0.2%<0.1% | +0.22 |
| Compute Health Acquisitin Co204833107 | Added– | 423,870325,720 | +98,150+30.1% | $4.14M$3.20M | +$958.9K | 0.2%0.2% | +0.05 |
| Ares Acquisition CorporationG33032106 | Added– | 402,63669,303 | +333,333+481.0% | $3.92M$676.0K | +$3.25M | 0.2%<0.1% | +0.17 |
| Social Leverage Acquisn Corp83363K102 | Added– | 399,45567,535 | +331,920+491.5% | $3.91M$656.0K | +$3.25M | 0.2%<0.1% | +0.17 |
| Allscripts Healthcare Solutn01988PAF5 | New– | –0 | – | $3.90M$0 | +$3.90M | 0.2%0.0% | +0.21 |
| Independence Holdings CorpG4761A101 | New– | 398,9290 | +398,929 | $3.90M$0 | +$3.90M | 0.2%0.0% | +0.21 |
| PCGPG&E Corp | ReducedHistory | 395,320445,120 | −49,800−11.2% | $3.79M$4.53M | −$478.1K | 0.2%0.2% | −0.04 |
| PICCPivotal Investment Corp III | AddedHistory | 389,69143,501 | +346,190+795.8% | $3.79M$424.0K | +$3.37M | 0.2%<0.1% | +0.18 |
| Periphas Capital Partnering Corp713895209 | Unchanged– | 149,584149,584 | 00.0% | $3.69M$3.74M | $0 | 0.2%0.2% | 0.00 |
| FTAAFTAC Athena Acquisition Corp. | NewHistory | 368,7560 | +368,756 | $3.64M$0 | +$3.64M | 0.2%0.0% | +0.19 |
| WBDWarner Bros. Discovery, Inc. | AddedHistory | 143,07810,000 | +133,078+1,330.8% | $3.63M$307.0K | +$3.38M | 0.2%<0.1% | +0.18 |
| Mason Industrial Technolgy I57520Y106 | Added– | 370,10010,100 | +360,000+3,564.4% | $3.60M$98.0K | +$3.51M | 0.2%<0.1% | +0.19 |
| RMG Acquisition Corp IIIG76088106 | Added– | 368,40327,410 | +340,993+1,244.0% | $3.58M$267.0K | +$3.32M | 0.2%<0.1% | +0.18 |
| Lazard Growth Acquisition CoG54035103 | Added– | 366,67546,677 | +319,998+685.6% | $3.57M$456.0K | +$3.11M | 0.2%<0.1% | +0.17 |
| BRWSaba Capital Income & Opportunities Fund | ReducedHistory | 777,6471,373,998 | −596,351−43.4% | $3.54M$6.47M | −$2.71M | 0.2%0.3% | −0.15 |
| Cree Inc225447AB7 | New– | –0 | – | $3.52M$0 | +$3.52M | 0.2%0.0% | +0.19 |
| VTAInvesco Dynamic Credit Opportunities Fund | NewHistory | 299,0720 | +299,072 | $3.50M$0 | +$3.50M | 0.2%0.0% | +0.19 |
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.