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 | |
|---|---|---|---|---|---|---|
|
NEWR
1601
CALL
DELISTED
New Relic, Inc.
NEWR
| $3.1M | ﹤0.01% |
28,200
-20,400
| -42% | -$1.97M |
|
1602
PUT
Rocket Lab Corp
RKLB
$39.9B
| $3.1M | ﹤0.01% |
+252,400
| New | +$3.47M |
|
1603
PUT
DXC Technology
DXC
$1.63B
| $3.1M | ﹤0.01% |
96,200
-65,200
| -40% | -$2.12M |
|
1604
PUT
Synopsys
SNPS
$71.5B
| $3.1M | ﹤0.01% |
8,400
-30,600
| -78% | -$10.3M |
|
1605
PUT
Natural Resource Partners
NRP
$1.3B
| $3.09M | ﹤0.01% |
92,600
+64,200
| +226% | +$1.96M |
|
|
1606
CALL
DXC Technology
DXC
$1.63B
| $3.09M | ﹤0.01% |
96,100
+50,300
| +110% | +$1.64M |
|
1607
PUT
Euronet Worldwide
EEFT
$3.02B
| $3.09M | ﹤0.01% |
25,900
+25,700
| +12,850% | +$3.05M |
|
1608
CALL
Vanguard Consumer Discretionary ETF
VCR
$5.84B
| $3.08M | ﹤0.01% |
13,000
-8,600
| -40% | -$2.89M |
|
|
TRTN
1609
CALL
DELISTED
Triton International Limited
TRTN
| $3.08M | ﹤0.01% |
51,200
+13,800
| +37% | +$804K |
|
1610
Energy Transfer Partners
ET
$70.1B
| $3.08M | ﹤0.01% |
374,527
-60,884
| -14% | -$553K |
|
1611
CALL
Realty Income
O
$61.2B
| $3.08M | ﹤0.01% |
100,600
-8,998
| -8% | -$619K |
|
|
CLR
1612
CALL
DELISTED
CONTINENTAL RESOURCES INC.
CLR
| $3.08M | ﹤0.01% |
68,700
+21,600
| +46% | +$1.03M |
|
1613
General Mills
GIS
$19.2B
| $3.07M | ﹤0.01% |
+45,604
| New | +$2.9M |
|
1614
CALL
Park Hotels & Resorts
PK
$2.97B
| $3.07M | ﹤0.01% |
162,700
-17,400
| -10% | -$327K |
|
1615
CALL
Academy Sports + Outdoors
ASO
$2.89B
| $3.07M | ﹤0.01% |
69,900
-142,600
| -67% | -$6.19M |
|
1616
CALL
Bally's
BALY
$672M
| $3.06M | ﹤0.01% |
80,500
+75,600
| +1,543% | +$3.31M |
|
1617
PUT
Universal Health Services
UHS
$9.43B
| $3.06M | ﹤0.01% |
23,600
-200
| -0.8% | -$25.7K |
|
|
FOCS
1618
PUT
DELISTED
Focus Financial Partners Inc. Class A
FOCS
| $3.06M | ﹤0.01% |
51,200
+48,600
| +1,869% | +$3.03M |
|
1619
PUT
Stanley Black & Decker
SWK
$14.2B
| $3.06M | ﹤0.01% |
16,200
+3,400
| +27% | +$628K |
|
|
1620
Academy Sports + Outdoors
ASO
$2.89B
| $3.05M | ﹤0.01% |
+69,548
| New | +$3.02M |
|
|
SAIL
1621
PUT
DELISTED
SailPoint Technologies Holdings, Inc. Common Stock
SAIL
| $3.05M | ﹤0.01% |
63,100
+58,800
| +1,367% | +$2.88M |
|
1622
CALL
Darling Ingredients
DAR
$9.93B
| $3.05M | ﹤0.01% |
44,000
-10,800
| -20% | -$785K |
|
|
PRFT
1623
CALL
DELISTED
Perficient Inc
PRFT
| $3.04M | ﹤0.01% |
23,500
+21,700
| +1,206% | +$2.86M |
|
1624
CALL
Middleby
MIDD
$6.05B
| $3.03M | ﹤0.01% |
15,400
+11,000
| +250% | +$2.01M |
|
1625
CALL
CubeSmart
CUBE
$9.53B
| $3.03M | ﹤0.01% |
53,200
+23,900
| +82% | +$1.29M |
|
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.