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 | |
|---|---|---|---|---|---|---|
|
DIDI
4651
DELISTED
DiDi Global Inc. American depositary shares, each four representing one Class A ordinary share
DIDI
| $285K | ﹤0.01% |
+57,229
| New | +$435K |
|
|
FMAC
4652
CALL
DELISTED
FirstMark Horizon Acquisition Corp.
FMAC
| $285K | ﹤0.01% |
28,900
-259,000
| -90% | -$2.56M |
|
4653
Genworth Financial
GNW
$3.76B
| $284K | ﹤0.01% |
70,329
+25,721
| +58% | +$107K |
|
4654
PUT
Photronics
PLAB
$1.79B
| $284K | ﹤0.01% |
15,100
+13,600
| +907% | +$199K |
|
|
AVEO
4655
CALL
DELISTED
AVEO Pharmaceuticals, Inc.
AVEO
| $284K | ﹤0.01% |
64,500
+11,300
| +21% | +$70.1K |
|
4656
CALL
American Well
AMWL
$180M
| $283K | ﹤0.01% |
2,350
-4,350
| -65% | -$663K |
|
4657
PUT
MarineMax
HZO
$759M
| $283K | ﹤0.01% |
4,800
-17,800
| -79% | -$953K |
|
4658
StepStone Group
STEP
$3.61B
| $283K | ﹤0.01% |
6,829
+4,415
| +183% | +$195K |
|
|
WPRT
4659
PUT
Westport Fuel Systems
WPRT
$33.5M
| $283K | ﹤0.01% |
11,960
+9,540
| +394% | +$272K |
|
4660
Carlisle Companies
CSL
$14.3B
| $282K | ﹤0.01% |
1,138
+186
| +20% | +$42.7K |
|
|
FOLD
4661
CALL
DELISTED
Amicus Therapeutics
FOLD
| $282K | ﹤0.01% |
24,500
-10,000
| -29% | -$111K |
|
|
ONT
4662
CALL
Onterris Inc
ONT
$759M
| $282K | ﹤0.01% |
4,000
+3,600
| +900% | +$249K |
|
4663
Wingstop
WING
$3.53B
| $282K | ﹤0.01% |
1,635
+1,118
| +216% | +$187K |
|
4664
Bumble
BMBL
$372M
| $281K | ﹤0.01% |
+8,312
| New | +$354K |
|
4665
PUT
Navigator Holdings
NVGS
$1.38B
| $281K | ﹤0.01% |
31,700
+7,200
| +29% | +$63.2K |
|
4666
CALL
Xos
XOS
$28.7M
| $281K | ﹤0.01% |
+2,980
| New | +$368K |
|
|
GLOP
4667
PUT
DELISTED
GASLOG PARTNERS LP
GLOP
| $281K | ﹤0.01% |
66,000
+2,000
| +3% | +$9.61K |
|
|
CVM.WS
4668
CALL
DELISTED
Cel-Sci Corp Series S
CVM.WS
| $281K | ﹤0.01% |
39,700
-166,400
| -81% | -$1.18M |
|
4669
PUT
Karyopharm Therapeutics
KPTI
$43.5M
| $280K | ﹤0.01% |
2,913
+2,300
| +375% | +$229K |
|
|
ORC
4670
Orchid Island Capital
ORC
$1.3B
| $280K | ﹤0.01% |
12,486
+9,099
| +269% | +$218K |
|
|
SPCK
4671
The SPAC and New Issue ETF
SPCK
$8.28M
| $280K | ﹤0.01% |
10,020
-58,769
| -85% | -$1.68M |
|
4672
Workhorse Group
WKHS
$33.2M
| $280K | ﹤0.01% |
21
-11
| -34% | -$200K |
|
|
ZUO
4673
PUT
DELISTED
Zuora, Inc.
ZUO
| $280K | ﹤0.01% |
15,000
+2,100
| +16% | +$42.2K |
|
4674
CALL
Build-A-Bear
BBW
$425M
| $279K | ﹤0.01% |
14,300
-15,300
| -52% | -$270K |
|
4675
Descartes Systems
DSGX
$6.44B
| $279K | ﹤0.01% |
3,381
+2,981
| +745% | +$244K |
|
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.