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 | |
|---|---|---|---|---|---|---|
5826
MKS Inc
MKSI
$21.7B
| $130K | ﹤0.01% |
749
-383
| -34% | -$59.9K |
|
5827
PUT
Manitowoc
MTW
$519M
| $130K | ﹤0.01% |
7,000
-3,300
| -32% | -$66.9K |
|
5828
Envista
NVST
$4.55B
| $130K | ﹤0.01% |
2,895
-27,958
| -91% | -$1.15M |
|
5829
PUT
Precigen
PGEN
$2.33B
| $130K | ﹤0.01% |
35,300
-13,300
| -27% | -$57.2K |
|
5830
ProQR Therapeutics
PRQR
$258M
| $130K | ﹤0.01% |
+16,291
| New | +$124K |
|
5831
CALL
ResMed
RMD
$32.4B
| $130K | ﹤0.01% |
500
-14,200
| -97% | -$3.68M |
|
5832
SelectQuote
SLQT
$131M
| $130K | ﹤0.01% |
+14,452
| New | +$158K |
|
|
RNLX
5833
CALL
DELISTED
Renalytix plc American Depositary Shares
RNLX
| $130K | ﹤0.01% |
8,200
+5,000
| +156% | +$100K |
|
|
DEN
5834
CALL
DELISTED
Denbury Inc.
DEN
| $130K | ﹤0.01% |
1,700
-41,700
| -96% | -$3.3M |
|
|
FRG
5835
PUT
DELISTED
Franchise Group, Inc.
FRG
| $130K | ﹤0.01% |
2,500
+1,300
| +108% | +$58.5K |
|
|
SEAH
5836
CALL
DELISTED
Sports Entertainment Acquisition Corp.
SEAH
| $130K | ﹤0.01% |
462,200
+361,000
| +357% | +$3.81M |
|
5837
CALL
ANI Pharmaceuticals
ANIP
$1.8B
| $129K | ﹤0.01% |
2,800
+1,800
| +180% | +$77.3K |
|
5838
BBVA Argentina
BBAR
$3.71B
| $129K | ﹤0.01% |
41,146
-3,575
| -8% | -$12.7K |
|
5839
Cabaletta Bio
CABA
$452M
| $129K | ﹤0.01% |
34,238
+28,657
| +513% | +$306K |
|
|
EFC
5840
PUT
Ellington Financial
EFC
$1.67B
| $129K | ﹤0.01% |
7,600
-13,800
| -64% | -$245K |
|
|
HONE
5841
DELISTED
HarborOne Bancorp
HONE
| $129K | ﹤0.01% |
8,701
+8,690
| +79,000% | +$126K |
|
5842
CALL
Centrus Energy
LEU
$3.72B
| $129K | ﹤0.01% |
2,600
-10,600
| -80% | -$590K |
|
5843
CALL
McEwen Inc
MUX
$1.12B
| $129K | ﹤0.01% |
14,560
+6,070
| +71% | +$63.2K |
|
|
RDHL
5844
PUT
Redhill Biopharma
RDHL
$3.94M
| $129K | ﹤0.01% |
50
+35
| +233% | +$140K |
|
|
SKYT
5845
CALL
DELISTED
SkyWater Technology
SKYT
| $129K | ﹤0.01% |
+8,000
| New | +$179K |
|
|
VMEO
5846
PUT
DELISTED
Vimeo
VMEO
| $129K | ﹤0.01% |
7,200
+3,400
| +89% | +$82.8K |
|
|
NM
5847
DELISTED
Navios Maritime Holdings Inc.
NM
| $129K | ﹤0.01% |
34,977
+14,711
| +73% | +$72.6K |
|
|
ATNX
5848
DELISTED
Athenex, Inc. Common Stock
ATNX
| $129K | ﹤0.01% |
4,750
+4,715
| +13,471% | +$199K |
|
5849
PUT
Capricor Therapeutics
CAPR
$241M
| $128K | ﹤0.01% |
43,800
-4,200
| -9% | -$14.7K |
|
5850
PUT
Carpenter Technology
CRS
$28.3B
| $128K | ﹤0.01% |
4,400
+2,600
| +144% | +$81K |
|
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.