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 | |
|---|---|---|---|---|---|---|
3601
CALL
Moody's
MCO
$83.7B
| $724K | ﹤0.01% |
2,000
+1,933
| +2,885% | +$643K |
|
3602
CALL
Sprout Social
SPT
$521M
| $724K | ﹤0.01% |
8,100
+8,055
| +17,900% | +$558K |
|
3603
PUT
Ormat Technologies
ORA
$6B
| $723K | ﹤0.01% |
10,400
+10,352
| +21,567% | +$736K |
|
|
ECHO
3604
EchoStar
ECHO
$24.3B
| $722K | ﹤0.01% |
29,733
-1,480
| -5% | -$38K |
|
3605
CALL
AeroVironment
AVAV
$7.51B
| $721K | ﹤0.01% |
7,200
+7,123
| +9,251% | +$784K |
|
|
HYRE
3606
CALL
DELISTED
HyreCar Inc. Common Stock
HYRE
| $721K | ﹤0.01% |
34,500
+34,187
| +10,922% | +$525K |
|
3607
ARK Innovation ETF
ARKK
$5.57B
| $720K | ﹤0.01% |
5,511
-16,283
| -75% | -$1.9M |
|
|
SFT
3608
CALL
DELISTED
Shift Technologies, Inc. Class A Common Stock
SFT
| $720K | ﹤0.01% |
8,400
+8,367
| +25,355% | +$670K |
|
3609
PUT
Coursera
COUR
$1.68B
| $719K | ﹤0.01% |
+18,200
| New | +$783K |
|
3610
CALL
Comstock
LODE
$223M
| $719K | ﹤0.01% |
19,830
+19,763
| +29,497% | +$762K |
|
|
SAGE
3611
DELISTED
Sage Therapeutics
SAGE
| $719K | ﹤0.01% |
12,671
-22,802
| -64% | -$1.61M |
|
3612
CALL
Sabra Healthcare REIT
SBRA
$5.7B
| $718K | ﹤0.01% |
39,500
+39,126
| +10,461% | +$697K |
|
|
SILV
3613
PUT
DELISTED
SilverCrest Metals Inc. Common Shares
SILV
| $718K | ﹤0.01% |
82,300
+81,071
| +6,597% | +$741K |
|
3614
CALL
Newell Brands
NWL
$2.26B
| $716K | ﹤0.01% |
+26,100
| New | +$719K |
|
3615
CALL
InterDigital
IDCC
$6.6B
| $715K | ﹤0.01% |
+9,800
| New | +$724K |
|
3616
PUT
Kratos Defense & Security Solutions
KTOS
$8.76B
| $715K | ﹤0.01% |
25,100
+23,970
| +2,121% | +$633K |
|
3617
CALL
Liberty Global Class C
LBTYK
$3.33B
| $715K | ﹤0.01% |
26,400
+26,147
| +10,335% | +$705K |
|
3618
PUT
Gevo
GEVO
$365M
| $713K | ﹤0.01% |
+98,100
| New | +$717K |
|
|
GOGL
3619
DELISTED
Golden Ocean Group
GOGL
| $712K | ﹤0.01% |
64,581
+14,336
| +29% | +$133K |
|
3620
iShares Russell 3000 ETF
IWV
$19.4B
| $712K | ﹤0.01% |
2,783
+2,600
| +1,421% | +$648K |
|
3621
Payoneer
PAYO
$2.41B
| $712K | ﹤0.01% |
+68,676
| New | +$722K |
|
3622
PUT
Commercial Vehicle Group
CVGI
$148M
| $711K | ﹤0.01% |
66,900
+66,536
| +18,279% | +$736K |
|
|
SC
3623
PUT
DELISTED
SANTANDER CONSUMER USA HOLDINGS INC
SC
| $711K | ﹤0.01% |
19,600
+19,486
| +17,093% | +$677K |
|
|
RAVN
3624
CALL
DELISTED
Raven Industries Inc
RAVN
| $711K | ﹤0.01% |
12,300
+12,166
| +9,079% | +$529K |
|
3625
Axsome Therapeutics
AXSM
$12.3B
| $710K | ﹤0.01% |
10,535
+10,198
| +3,026% | +$612K |
|
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.