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 |
State Street Financial Select Sector SPDR ETF
XLF
|
+$42.6M |
| 2 |
Shopify
SHOP
|
+$39.6M |
| 3 |
iShares China Large-Cap ETF
FXI
|
+$35.4M |
| 4 |
Verizon
VZ
|
+$34.1M |
| 5 |
KraneShares CSI China Internet ETF
KWEB
|
+$34.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
AMC Entertainment Holdings
AMC
|
+$49.5M |
| 2 |
GE Aerospace
GE
|
+$35.2M |
| 3 |
Carnival Corporation Ltd
CCL
|
+$30.5M |
| 4 |
Advanced Micro Devices
AMD
|
+$28.8M |
| 5 |
Micron Technology
MU
|
+$23.7M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.61% |
| 2 | Consumer Discretionary | 0.43% |
| 3 | Healthcare | 0.35% |
| 4 | Communication Services | 0.23% |
| 5 | Financials | 0.21% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
MIMO
6101
CALL
DELISTED
Airspan Networks Holdings Inc
MIMO
| $110K | ﹤0.01% |
+29,100
| New | +$172K |
|
|
ROCC
6102
PUT
DELISTED
Ranger Oil Corporation Class A Common Stock
ROCC
| $110K | ﹤0.01% |
+4,100
| New | +$120K |
|
|
IO
6103
CALL
DELISTED
ION Geophysical Corporation
IO
| $110K | ﹤0.01% |
125,300
+98,400
| +366% | +$160K |
|
6104
PUT
Apple Hospitality REIT
APLE
$3.9B
| $109K | ﹤0.01% |
6,800
-2,700
| -28% | -$42.7K |
|
6105
BigBear.ai
BBAI
$1.45B
| $109K | ﹤0.01% |
+19,394
| New | +$141K |
|
6106
Brighthouse Financial
BHF
$3.59B
| $109K | ﹤0.01% |
2,123
-148
| -7% | -$7.57K |
|
|
BPT
6107
DELISTED
BP Prudhoe Bay Royalty Trust
BPT
| $109K | ﹤0.01% |
27,841
+9,732
| +54% | +$38.8K |
|
6108
PUT
Sprinklr
CXM
$1.56B
| $109K | ﹤0.01% |
+6,900
| New | +$113K |
|
6109
Invesco DB Energy Fund
DBE
$82.5M
| $109K | ﹤0.01% |
6,386
+4,423
| +225% | +$77.2K |
|
6110
PUT
Deckers Outdoor
DECK
$13.6B
| $109K | ﹤0.01% |
1,800
-21,000
| -92% | -$1.35M |
|
6111
Energizer
ENR
$1.57B
| $109K | ﹤0.01% |
2,719
+511
| +23% | +$19.6K |
|
6112
iShares MSCI Canada ETF
EWC
$6.29B
| $109K | ﹤0.01% |
+2,847
| New | +$109K |
|
|
EXK
6113
PUT
Endeavour Silver
EXK
$2.66B
| $109K | ﹤0.01% |
25,900
+6,400
| +33% | +$30.1K |
|
|
FARM
6114
CALL
DELISTED
Farmer Brothers
FARM
| $109K | ﹤0.01% |
14,700
+11,200
| +320% | +$82.5K |
|
6115
CALL
Genesco
GCO
$446M
| $109K | ﹤0.01% |
1,700
+1,300
| +325% | +$82.5K |
|
6116
Inspire Medical Systems
INSP
$1.74B
| $109K | ﹤0.01% |
478
-363
| -43% | -$88.6K |
|
6117
CALL
Pulmonx
LUNG
$84.5M
| $109K | ﹤0.01% |
+3,400
| New | +$124K |
|
6118
ManpowerGroup
MAN
$2.54B
| $109K | ﹤0.01% |
1,122
-2,956
| -72% | -$297K |
|
6119
PUT
MSC Industrial Direct
MSM
$7.11B
| $109K | ﹤0.01% |
1,300
-4,300
| -77% | -$359K |
|
6120
PUT
PolyPid
PYPD
$88.8M
| $109K | ﹤0.01% |
+637
| New | +$134K |
|
|
RYZ
6121
Ryerson Holding Corp
RYZ
$1.43B
| $109K | ﹤0.01% |
4,213
+3,751
| +812% | +$94.3K |
|
6122
CALL
SIGA Technologies
SIGA
$224M
| $109K | ﹤0.01% |
14,500
+6,400
| +79% | +$48.8K |
|
|
SNT
6123
Senstar Technologies
SNT
$46.9M
| $109K | ﹤0.01% |
37,528
+37,525
| +1,250,833% | +$135K |
|
|
AMYT
6124
DELISTED
Amryt Pharma plc American Depositary Shares
AMYT
| $109K | ﹤0.01% |
+10,093
| New | +$109K |
|
|
VLDR
6125
CALL
DELISTED
Velodyne Lidar, Inc. Common Stock
VLDR
| $109K | ﹤0.01% |
23,700
-155,800
| -87% | -$911K |
|
Similar funds
Simplex Trading's Q4 2021 Portfolio in Review
As of Q4 2021, Simplex Trading held 12,077 positions worth $99B, down 7.5% from $107B the previous quarter. Its ten largest holdings account for 33% of the portfolio.
Simplex Trading withdrew a net $10.8B in Q4 2021, closing 1,645 positions and reducing 4,258 holdings. Its most notable exit was Carnival Corporation Ltd, an estimated $30.5M position sold in full.
By sector, the portfolio is most concentrated in Technology at 0.61% of assets, up from 0.49% a quarter earlier, followed by Consumer Discretionary and Healthcare.
Against the trend, Simplex Trading opened a new position in iShares China Large-Cap ETF worth $33M.
- Simplex Trading's largest Q4 2021 buy was iShares China Large-Cap ETF: 902,666 shares worth $33M.
- Simplex Trading added most to State Street Financial Select Sector SPDR ETF in Q4 2021, an estimated $42.6M increase.
- Simplex Trading's biggest Q4 2021 reduction was AMC Entertainment Holdings, cutting an estimated $49.5M.
- Simplex Trading fully exited Carnival Corporation Ltd in Q4 2021, selling an estimated $30.5M.
- Simplex Trading's ten largest holdings make up 33% of its $99B portfolio in Q4 2021.
- Simplex Trading opened 2,269 new positions and closed 1,645 in Q4 2021.
- Simplex Trading's portfolio value fell 7.5% quarter-over-quarter to $99B.
Based on Simplex Trading's 13F filing for Q4 2021, filed 4 Feb 2022.