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 | |
|---|---|---|---|---|---|---|
2926
CALL
Alexandria Real Estate Equities
ARE
$8.88B
| $1.13M | ﹤0.01% |
6,200
+6,009
| +3,146% | +$1.08M |
|
|
MRSH
2927
CALL
Marsh
MRSH
$86.3B
| $1.13M | ﹤0.01% |
8,000
+7,842
| +4,963% | +$1.05M |
|
|
APPH
2928
PUT
DELISTED
AppHarvest, Inc. Common Stock
APPH
| $1.12M | ﹤0.01% |
70,300
+69,688
| +11,387% | +$1.11M |
|
2929
Invesco DB Agriculture Fund
DBA
$1.26B
| $1.12M | ﹤0.01% |
60,281
+46,787
| +347% | +$854K |
|
2930
Schrodinger
SDGR
$1.12B
| $1.12M | ﹤0.01% |
14,854
+8,597
| +137% | +$623K |
|
2931
PUT
The RealReal
REAL
$1.34B
| $1.12M | ﹤0.01% |
56,600
+56,449
| +37,383% | +$1.15M |
|
|
AEVA
2932
CALL
Aeva Technologies
AEVA
$1.02B
| $1.12M | ﹤0.01% |
21,140
+20,837
| +6,877% | +$1.05M |
|
2933
Palo Alto Networks
PANW
$264B
| $1.12M | ﹤0.01% |
18,048
+17,628
| +4,197% | +$1.04M |
|
2934
Targa Resources
TRGP
$60.4B
| $1.12M | ﹤0.01% |
+25,117
| New | +$972K |
|
2935
U-Haul Holding Co
UHAL
$14B
| $1.12M | ﹤0.01% |
18,940
+18,870
| +26,957% | +$1.11M |
|
2936
PUT
Credicorp
BAP
$30.9B
| $1.11M | ﹤0.01% |
9,200
+9,113
| +10,475% | +$1.19M |
|
|
AZPN
2937
CALL
DELISTED
ASPEN TECHNOLOGY INC
AZPN
| $1.11M | ﹤0.01% |
8,100
+8,074
| +31,054% | +$1.11M |
|
2938
Cencora
COR
$60.3B
| $1.11M | ﹤0.01% |
9,729
+4,142
| +74% | +$489K |
|
|
SPNS
2939
DELISTED
Sapiens International
SPNS
| $1.11M | ﹤0.01% |
42,352
+25,647
| +154% | +$758K |
|
|
VWTR
2940
DELISTED
Vidler Water Resouces, Inc. Common Stock
VWTR
| $1.11M | ﹤0.01% |
83,630
+83,593
| +225,927% | +$861K |
|
|
WBT
2941
DELISTED
Welbilt, Inc.
WBT
| $1.11M | ﹤0.01% |
48,000
+33,279
| +226% | +$706K |
|
2942
Global X Autonomous & Electric Vehicles ETF
DRIV
$378M
| $1.11M | ﹤0.01% |
39,222
+32,176
| +457% | +$882K |
|
2943
CALL
Incyte
INCY
$23.5B
| $1.11M | ﹤0.01% |
+13,200
| New | +$1.1M |
|
2944
PUT
Axalta
AXTA
$7.01B
| $1.11M | ﹤0.01% |
36,400
+35,928
| +7,612% | +$1.14M |
|
2945
PUT
Archer Daniels Midland
ADM
$41.4B
| $1.11M | ﹤0.01% |
+18,300
| New | +$1.16M |
|
2946
Microchip Technology
MCHP
$42.8B
| $1.11M | ﹤0.01% |
14,810
-18,018
| -55% | -$1.37M |
|
|
ODP
2947
DELISTED
ODP
ODP
| $1.11M | ﹤0.01% |
23,099
+8,908
| +63% | +$393K |
|
|
BERY
2948
DELISTED
Berry Global Group, Inc.
BERY
| $1.11M | ﹤0.01% |
18,486
+5,602
| +43% | +$337K |
|
|
BECN
2949
CALL
DELISTED
Beacon Roofing Supply, Inc.
BECN
| $1.11M | ﹤0.01% |
20,800
+20,644
| +13,233% | +$1.15M |
|
2950
Dollar General
DG
$25.9B
| $1.11M | ﹤0.01% |
5,112
-2,018
| -28% | -$424K |
|
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.