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 | |
|---|---|---|---|---|---|---|
2026
PUT
First Trust Natural Gas ETF
FCG
$632M
| $2.21M | ﹤0.01% |
21,500
+20,977
| +4,011% | +$300K |
|
2027
CALL
SiriusXM
SIRI
$10B
| $2.21M | ﹤0.01% |
33,800
+33,653
| +22,893% | +$2.11M |
|
|
PFPT
2028
PUT
DELISTED
Proofpoint, Inc.
PFPT
| $2.21M | ﹤0.01% |
12,700
+12,562
| +9,103% | +$2.04M |
|
2029
CALL
Aurinia Pharmaceuticals
AUPH
$1.97B
| $2.21M | ﹤0.01% |
+170,200
| New | +$2.17M |
|
2030
CALL
Hancock Whitney
HWC
$6.13B
| $2.2M | ﹤0.01% |
49,600
+49,440
| +30,900% | +$2.3M |
|
2031
CALL
Public Service Enterprise Group
PEG
$39.8B
| $2.2M | ﹤0.01% |
36,900
+36,812
| +41,832% | +$2.27M |
|
|
AZEK
2032
CALL
DELISTED
The AZEK Co
AZEK
| $2.2M | ﹤0.01% |
51,900
+51,069
| +6,145% | +$2.29M |
|
2033
Vanguard Total Stock Market ETF
VTI
$654B
| $2.2M | ﹤0.01% |
9,880
-183
| -2% | -$39.7K |
|
2034
CALL
Raymond James Financial
RJF
$32.5B
| $2.19M | ﹤0.01% |
25,350
+24,910
| +5,661% | +$2.17M |
|
2035
CALL
KeyCorp
KEY
$24.3B
| $2.19M | ﹤0.01% |
+106,200
| New | +$2.31M |
|
2036
PUT
Tandem Diabetes Care
TNDM
$1.17B
| $2.19M | ﹤0.01% |
22,500
+22,262
| +9,354% | +$1.99M |
|
2037
CALL
Interactive Brokers
IBKR
$40.9B
| $2.19M | ﹤0.01% |
133,200
+130,384
| +4,630% | +$2.26M |
|
2038
PUT
Jefferies Financial Group
JEF
$12.9B
| $2.19M | ﹤0.01% |
66,944
+66,463
| +13,818% | +$2.03M |
|
|
TSP
2039
PUT
DELISTED
TuSimple Holdings Inc. Class A Common Stock
TSP
| $2.19M | ﹤0.01% |
+30,700
| New | +$1.32M |
|
2040
CALL
Kratos Defense & Security Solutions
KTOS
$8.88B
| $2.19M | ﹤0.01% |
76,700
+75,608
| +6,924% | +$2M |
|
|
MDP
2041
CALL
DELISTED
Meredith Corporation
MDP
| $2.19M | ﹤0.01% |
+50,300
| New | +$1.78M |
|
2042
PUT
AllianceBernstein
AB
$3.47B
| $2.18M | ﹤0.01% |
46,900
+46,505
| +11,773% | +$2.03M |
|
2043
Agnico Eagle Mines
AEM
$72.6B
| $2.18M | ﹤0.01% |
36,097
-17,305
| -32% | -$1.16M |
|
2044
CALL
Amdocs
DOX
$5.53B
| $2.18M | ﹤0.01% |
28,200
+28,192
| +352,400% | +$2.18M |
|
2045
PUT
International Flavors & Fragrances
IFF
$19.4B
| $2.18M | ﹤0.01% |
14,600
+14,107
| +2,861% | +$2.02M |
|
2046
CALL
Broadridge
BR
$17.2B
| $2.18M | ﹤0.01% |
13,500
+13,489
| +122,627% | +$2.16M |
|
2047
CALL
JFrog
FROG
$9.71B
| $2.18M | ﹤0.01% |
47,900
+47,488
| +11,526% | +$2.14M |
|
2048
CALL
Rayonier
RYN
$6.49B
| $2.18M | ﹤0.01% |
66,905
+66,735
| +39,256% | +$2.19M |
|
|
AMED
2049
PUT
DELISTED
Amedisys
AMED
| $2.18M | ﹤0.01% |
8,900
+8,888
| +74,067% | +$2.33M |
|
|
VLTA
2050
CALL
DELISTED
Volta Inc.
VLTA
| $2.18M | ﹤0.01% |
217,200
+211,854
| +3,963% | +$2.15M |
|
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.