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 | |
|---|---|---|---|---|---|---|
4026
PUT
Broadstone Net Lease
BNL
$4.3B
| $543K | ﹤0.01% |
23,200
+23,196
| +579,900% | +$498K |
|
4027
PUT
TechnipFMC
FTI
$28.9B
| $543K | ﹤0.01% |
65,200
+64,872
| +19,778% | +$548K |
|
4028
PUT
Veru
VERU
$35.8M
| $543K | ﹤0.01% |
6,740
+6,624
| +5,710% | +$583K |
|
|
MN
4029
CALL
DELISTED
MANNING & NAPIER, INC.
MN
| $543K | ﹤0.01% |
69,100
+68,965
| +51,085% | +$522K |
|
4030
PUT
Progyny
PGNY
$2.41B
| $542K | ﹤0.01% |
9,200
+9,104
| +9,483% | +$511K |
|
|
AIV
4031
CALL
Aimco
AIV
$375M
| $541K | ﹤0.01% |
80,700
+80,128
| +14,008% | +$551K |
|
4032
CALL
Aldeyra Therapeutics
ALDX
$95.3M
| $541K | ﹤0.01% |
47,800
+47,793
| +682,757% | +$575K |
|
4033
CALL
Sinclair Inc
SBGI
$1.02B
| $541K | ﹤0.01% |
16,300
+16,099
| +8,009% | +$521K |
|
4034
CALL
Alphatec Holdings
ATEC
$1.43B
| $540K | ﹤0.01% |
35,300
+35,173
| +27,695% | +$543K |
|
4035
CALL
Eos Energy Enterprises
EOSE
$1.22B
| $540K | ﹤0.01% |
30,100
+28,969
| +2,561% | +$467K |
|
4036
CALL
Extra Space Storage
EXR
$32.2B
| $540K | ﹤0.01% |
3,300
+3,064
| +1,298% | +$459K |
|
|
JOAN
4037
CALL
DELISTED
JOANN, Inc. Common Stock
JOAN
| $540K | ﹤0.01% |
+34,300
| New | +$470K |
|
4038
CALL
CareDx
CDNA
$1.85B
| $539K | ﹤0.01% |
5,900
+5,898
| +294,900% | +$469K |
|
4039
Camden Property Trust
CPT
$11.4B
| $539K | ﹤0.01% |
4,067
+2,695
| +196% | +$334K |
|
|
GNOG
4040
CALL
DELISTED
Golden Nugget Online Gaming, Inc. Class A Common Stock
GNOG
| $539K | ﹤0.01% |
42,300
+40,999
| +3,151% | +$556K |
|
|
XLRN
4041
PUT
DELISTED
Acceleron Pharma
XLRN
| $539K | ﹤0.01% |
4,300
+4,061
| +1,699% | +$512K |
|
4042
PUT
Encompass Health
EHC
$11.5B
| $538K | ﹤0.01% |
8,673
+8,540
| +6,421% | +$569K |
|
4043
Floor & Decor
FND
$6.14B
| $538K | ﹤0.01% |
+5,096
| New | +$529K |
|
|
AZUL
4044
DELISTED
Azul
AZUL
| $537K | ﹤0.01% |
+20,342
| New | +$486K |
|
4045
PUT
Cullen/Frost Bankers
CFR
$10.5B
| $537K | ﹤0.01% |
4,800
+4,783
| +28,135% | +$559K |
|
|
DEN
4046
PUT
DELISTED
Denbury Inc.
DEN
| $537K | ﹤0.01% |
+7,000
| New | +$427K |
|
4047
CALL
Leslie's
LESL
$9.83M
| $536K | ﹤0.01% |
975
+970
| +19,400% | +$532K |
|
|
FRTA
4048
PUT
DELISTED
Forterra, Inc
FRTA
| $536K | ﹤0.01% |
22,800
+22,799
| +2,279,900% | +$534K |
|
4049
Takeda Pharmaceutical
TAK
$56B
| $535K | ﹤0.01% |
31,792
+14,767
| +87% | +$251K |
|
4050
PUT
Advantage Solutions
ADV
$542M
| $534K | ﹤0.01% |
1,980
+1,973
| +28,186% | +$609K |
|
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.