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 | |
|---|---|---|---|---|---|---|
|
LL
5101
DELISTED
LL Flooring Holdings, Inc.
LL
| $213K | ﹤0.01% |
12,487
-2,027
| -14% | -$35.7K |
|
|
SWAV
5102
PUT
DELISTED
Shockwave Medical, Inc. Common Stock
SWAV
| $213K | ﹤0.01% |
1,200
-3,800
| -76% | -$749K |
|
5103
PUT
Aterian
ATER
$4.45M
| $212K | ﹤0.01% |
4,308
+3,200
| +289% | +$237K |
|
|
DAO
5104
CALL
Youdao
DAO
$2.03B
| $212K | ﹤0.01% |
17,000
-6,900
| -29% | -$89.5K |
|
|
FARO
5105
DELISTED
Faro Technologies
FARO
| $212K | ﹤0.01% |
+3,039
| New | +$218K |
|
5106
CALL
Standard BioTools
LAB
$340M
| $212K | ﹤0.01% |
54,100
+31,600
| +140% | +$148K |
|
5107
CALL
Nice
NICE
$5.79B
| $212K | ﹤0.01% |
700
+500
| +250% | +$144K |
|
5108
Realty Income
O
$59.6B
| $212K | ﹤0.01% |
+2,974
| New | +$205K |
|
5109
CALL
ProQR Therapeutics
PRQR
$243M
| $212K | ﹤0.01% |
26,500
+5,200
| +24% | +$39.6K |
|
5110
Redwire
RDW
$2.06B
| $212K | ﹤0.01% |
+31,527
| New | +$304K |
|
5111
PUT
Brookfield Infrastructure
BIPC
$5.2B
| $211K | ﹤0.01% |
+4,650
| New | +$192K |
|
5112
CACI
CACI
$11B
| $211K | ﹤0.01% |
784
+295
| +60% | +$80.8K |
|
5113
CALL
Camtek
CAMT
$6.18B
| $211K | ﹤0.01% |
4,600
+4,300
| +1,433% | +$183K |
|
5114
CALL
Tilly's
TLYS
$116M
| $211K | ﹤0.01% |
13,100
+9,600
| +274% | +$145K |
|
5115
L3Harris
LHX
$51.6B
| $210K | ﹤0.01% |
+986
| New | +$219K |
|
5116
UFP Industries
UFPI
$4.9B
| $210K | ﹤0.01% |
+2,291
| New | +$193K |
|
5117
CALL
Unifirst Corp
UNF
$5.3B
| $210K | ﹤0.01% |
1,000
-100
| -9% | -$20.5K |
|
|
HOLI
5118
DELISTED
Hollsys Automation Technologies INTERNATIONAL, LTD. COMMON (British Virgin Island)
HOLI
| $210K | ﹤0.01% |
14,961
-23,164
| -61% | -$385K |
|
|
CSLT
5119
CALL
DELISTED
CASTLIGHT HEALTH, INC.
CSLT
| $210K | ﹤0.01% |
136,700
-39,000
| -22% | -$64.3K |
|
5120
Allot
ALLT
$372M
| $209K | ﹤0.01% |
17,603
+17,048
| +3,072% | +$224K |
|
5121
PUT
Costamare
CMRE
$1.88B
| $209K | ﹤0.01% |
16,600
-5,000
| -23% | -$65.4K |
|
|
ELME
5122
CALL
Elme Communities
ELME
$143M
| $209K | ﹤0.01% |
8,100
-8,100
| -50% | -$207K |
|
|
PPLI
5123
CALL
People Inc
PPLI
$3.09B
| $209K | ﹤0.01% |
1,950
-9,996
| -84% | -$1.13M |
|
|
PLL
5124
CALL
DELISTED
Piedmont Lithium
PLL
| $209K | ﹤0.01% |
4,000
-18,300
| -82% | -$1.07M |
|
|
AVTA
5125
PUT
DELISTED
Avantax, Inc. Common Stock
AVTA
| $209K | ﹤0.01% |
12,100
-20,600
| -63% | -$350K |
|
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.