Simplex Trading Portfolio holdings
Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
AMC Entertainment Holdings
AMC
|
+$39.3M |
| 2 |
AT&T
T
|
+$29.8M |
| 3 |
NVIDIA
NVDA
|
+$28.3M |
| 4 |
Micron Technology
MU
|
+$22.9M |
| 5 |
Baidu
BIDU
|
+$22.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Invesco QQQ Trust
QQQ
|
+$36.1M |
| 2 |
Tesla
TSLA
|
+$35.2M |
| 3 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$25.9M |
| 4 |
Palantir
PLTR
|
+$25.7M |
| 5 |
Wells Fargo
WFC
|
+$20.4M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.47% |
| 2 | Consumer Discretionary | 0.39% |
| 3 | Communication Services | 0.27% |
| 4 | Healthcare | 0.26% |
| 5 | Financials | 0.25% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
TGB
5651
Trekor Metals
TGB
$2.48B
| $204K | ﹤0.01% |
96,387
+2,045
| +2% | +$4.4K |
|
|
ZH
5652
CALL
Zhihu
ZH
$281M
| $204K | ﹤0.01% |
+2,517
| New | +$144K |
|
|
GPP
5653
CALL
DELISTED
Green Plains Partners LP
GPP
| $204K | ﹤0.01% |
16,000
+15,812
| +8,411% | +$193K |
|
|
PAYA
5654
DELISTED
Paya Holdings Inc. Class A Common Stock
PAYA
| $204K | ﹤0.01% |
18,568
+17,670
| +1,968% | +$188K |
|
5655
US Global Investors
GROW
$35.5M
| $203K | ﹤0.01% |
32,844
+963
| +3% | +$6.86K |
|
|
KALV
5656
PUT
DELISTED
KalVista Pharmaceuticals
KALV
| $203K | ﹤0.01% |
8,500
+8,454
| +18,378% | +$221K |
|
5657
PUT
LiveOne
LVO
$61.7M
| $203K | ﹤0.01% |
4,320
+4,290
| +14,300% | +$186K |
|
5658
CALL
Rockwell Medical
RMTI
$28.4M
| $203K | ﹤0.01% |
2,028
+2,003
| +8,012% | +$207K |
|
|
OZON
5659
DELISTED
Ozon Holdings PLC American Depositary Shares, each ADS representing one ordinary share
OZON
| $203K | ﹤0.01% |
3,466
-23,245
| -87% | -$1.35M |
|
5660
Century Casinos
CNTY
$34M
| $202K | ﹤0.01% |
+15,090
| New | +$197K |
|
|
HEPA
5661
CALL
DELISTED
Hepion Pharmaceuticals
HEPA
| $202K | ﹤0.01% |
102
+101
| +10,100% | +$185K |
|
5662
Henry Schein
HSIC
$9.77B
| $202K | ﹤0.01% |
+2,729
| New | +$206K |
|
5663
PUT
NGL Energy Partners
NGL
$2.05B
| $202K | ﹤0.01% |
85,200
+83,592
| +5,199% | +$187K |
|
5664
Watsco Inc
WSO
$12.7B
| $202K | ﹤0.01% |
707
+537
| +316% | +$154K |
|
5665
PUT
Zedge
ZDGE
$38.6M
| $202K | ﹤0.01% |
11,000
+10,576
| +2,494% | +$148K |
|
|
AAIC
5666
CALL
DELISTED
Arlington Asset Investment Corp.
AAIC
| $202K | ﹤0.01% |
49,900
+49,856
| +113,309% | +$202K |
|
|
UPH
5667
PUT
DELISTED
UpHealth, Inc.
UPH
| $202K | ﹤0.01% |
3,000
+2,862
| +2,074% | +$269K |
|
5668
PUT
AudioCodes
AUDC
$244M
| $201K | ﹤0.01% |
6,100
+5,472
| +871% | +$175K |
|
5669
CALL
Cullen/Frost Bankers
CFR
$10.3B
| $201K | ﹤0.01% |
1,800
+1,794
| +29,900% | +$210K |
|
5670
Duluth Holdings
DLTH
$155M
| $201K | ﹤0.01% |
9,736
-1,323
| -12% | -$21.8K |
|
5671
PUT
Factset
FDS
$9.36B
| $201K | ﹤0.01% |
600
+594
| +9,900% | +$194K |
|
5672
CALL
Lloyds Banking Group
LYG
$89.5B
| $201K | ﹤0.01% |
79,000
+78,413
| +13,358% | +$201K |
|
5673
CALL
Signet Jewelers
SIG
$3.61B
| $201K | ﹤0.01% |
2,500
+2,434
| +3,688% | +$158K |
|
|
TPH
5674
CALL
DELISTED
Tri Pointe Homes
TPH
| $201K | ﹤0.01% |
9,400
+9,284
| +8,003% | +$213K |
|
5675
Village Farms International
VFF
$234M
| $201K | ﹤0.01% |
18,828
+1,821
| +11% | +$19.2K |
|
Similar funds
Simplex Trading's Q2 2021 Portfolio in Review
As of Q2 2021, Simplex Trading held 11,184 positions worth $104B, up 86% from $55.7B the previous quarter. Its ten largest holdings account for 40% of the portfolio.
Simplex Trading deployed $97.5B of net new capital in Q2 2021, opening 2,250 new positions and adding to 6,673 existing holdings. Its largest new stake was AT&T: 1,311,180 shares worth $28.5M.
By sector, the portfolio is most concentrated in Technology at 0.47% of assets, down from 0.65% a quarter earlier, followed by Consumer Discretionary and Communication Services.
On the sell side, the largest reduction was State Street SPDR Dow Jones Industrial Average ETF Trust, an estimated $25.9M trimmed.
- Simplex Trading's largest Q2 2021 buy was AT&T: 1,311,180 shares worth $28.5M.
- Simplex Trading added most to AMC Entertainment Holdings in Q2 2021, an estimated $39.3M increase.
- Simplex Trading's biggest Q2 2021 reduction was State Street SPDR Dow Jones Industrial Average ETF Trust, cutting an estimated $25.9M.
- Simplex Trading fully exited Invesco QQQ Trust in Q2 2021, selling an estimated $36.1M.
- Simplex Trading's ten largest holdings make up 40% of its $104B portfolio in Q2 2021.
- Simplex Trading opened 2,250 new positions and closed 1,197 in Q2 2021.
- Simplex Trading's portfolio value rose 86% quarter-over-quarter to $104B.
Based on Simplex Trading's 13F filing for Q2 2021, filed 12 Aug 2021.