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 | |
|---|---|---|---|---|---|---|
|
SNR
7101
PUT
DELISTED
NEW SENIOR INVESTMENT GROUP INC.
SNR
| $77K | ﹤0.01% |
8,800
+8,734
| +13,233% | +$60.1K |
|
|
ACR
7102
PUT
ACRES Commercial Realty
ACR
$126M
| $76K | ﹤0.01% |
4,786
+4,727
| +8,012% | +$75.3K |
|
7103
CALL
CACI
CACI
$10.5B
| $76K | ﹤0.01% |
300
+296
| +7,400% | +$76.4K |
|
7104
PUT
Genprex
GNPX
$3.06M
| $76K | ﹤0.01% |
+1
| New | +$164K |
|
7105
CALL
Immunic
IMUX
$191M
| $76K | ﹤0.01% |
620
+615
| +12,300% | +$85.1K |
|
7106
Mercer International
MERC
$39.5M
| $76K | ﹤0.01% |
6,020
-26,145
| -81% | -$387K |
|
7107
MKS Inc
MKSI
$19.8B
| $76K | ﹤0.01% |
432
-542
| -56% | -$98.5K |
|
7108
PUT
MaxLinear
MXL
$6.07B
| $76K | ﹤0.01% |
1,800
+1,778
| +8,082% | +$66.3K |
|
7109
CALL
Nomad Foods
NOMD
$1.73B
| $76K | ﹤0.01% |
2,700
+2,660
| +6,650% | +$78.3K |
|
7110
PUT
Open Text
OTEX
$6.15B
| $76K | ﹤0.01% |
1,500
+1,490
| +14,900% | +$72K |
|
7111
CALL
Oxford Square Capital
OXSQ
$151M
| $76K | ﹤0.01% |
15,500
+15,470
| +51,567% | +$76.6K |
|
7112
PUT
Puma Biotechnology
PBYI
$402M
| $76K | ﹤0.01% |
+8,300
| New | +$84.1K |
|
7113
PUT
PRA Group
PRAA
$662M
| $76K | ﹤0.01% |
2,000
+1,980
| +9,900% | +$76.1K |
|
7114
CALL
Rafael Holdings
RFL
$104M
| $76K | ﹤0.01% |
+1,521
| New | +$66.3K |
|
7115
PUT
Tradeweb Markets
TW
$20.8B
| $76K | ﹤0.01% |
900
+409
| +83% | +$33.4K |
|
7116
CALL
WD-40
WDFC
$3.06B
| $76K | ﹤0.01% |
300
+288
| +2,400% | +$73.6K |
|
7117
PUT
WisdomTree
WT
$2.88B
| $76K | ﹤0.01% |
12,400
+11,960
| +2,718% | +$78.9K |
|
|
FFAI
7118
Faraday Future Intelligent Electric
FFAI
$13.7M
| – | – |
0
| – | – |
|
|
DCPH
7119
PUT
DELISTED
Deciphera Pharmaceuticals, Inc. Common Stock
DCPH
| $76K | ﹤0.01% |
2,100
+2,082
| +11,567% | +$80.6K |
|
|
TYME
7120
PUT
DELISTED
Tyme Technologies, Inc. Common Stock
TYME
| $76K | ﹤0.01% |
60,400
+59,636
| +7,806% | +$86K |
|
|
SAIL
7121
CALL
DELISTED
SailPoint Technologies Holdings, Inc. Common Stock
SAIL
| $76K | ﹤0.01% |
1,500
+1,288
| +608% | +$61.9K |
|
7122
CALL
Bassett Furniture
BSET
$168M
| $75K | ﹤0.01% |
3,100
+3,073
| +11,381% | +$90K |
|
7123
PUT
BioXcel Therapeutics
BTAI
$24.5M
| $75K | ﹤0.01% |
163
+159
| +3,975% | +$86.7K |
|
|
CAF
7124
CALL
Morgan Stanley China A Share Fund
CAF
$325M
| $75K | ﹤0.01% |
3,300
+3,246
| +6,011% | +$74.4K |
|
7125
PUT
Dover
DOV
$27.5B
| $75K | ﹤0.01% |
500
+451
| +920% | +$66.5K |
|
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.