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 | |
|---|---|---|---|---|---|---|
4151
Omeros
OMER
$834M
| $393K | ﹤0.01% |
61,150
-55,947
| -48% | -$406K |
|
4152
CALL
Roper Technologies
ROP
$40.4B
| $393K | ﹤0.01% |
800
-4,900
| -86% | -$2.33M |
|
4153
CALL
Vanguard FTSE Developed Markets ETF
VEA
$224B
| $393K | ﹤0.01% |
7,700
-9,500
| -55% | -$488K |
|
4154
Watsco Inc
WSO
$12.8B
| $393K | ﹤0.01% |
1,259
+552
| +78% | +$164K |
|
4155
BeyondSpring
BYSI
$48.5M
| $392K | ﹤0.01% |
86,583
+80,455
| +1,313% | +$909K |
|
4156
PUT
Clarivate
CLVT
$1.37B
| $392K | ﹤0.01% |
16,700
-74,500
| -82% | -$1.73M |
|
|
DENN
4157
CALL
DELISTED
Denny's
DENN
| $392K | ﹤0.01% |
24,500
-4,200
| -15% | -$64.3K |
|
|
HUYA
4158
CALL
Huya Inc
HUYA
$561M
| $392K | ﹤0.01% |
56,500
+20,500
| +57% | +$170K |
|
4159
Inseego
INSG
$103M
| $392K | ﹤0.01% |
6,732
-4,409
| -40% | -$287K |
|
4160
PUT
AES
AES
$10.6B
| $391K | ﹤0.01% |
16,100
+4,200
| +35% | +$102K |
|
|
POSH
4161
DELISTED
Poshmark, Inc. Class A Common Stock
POSH
| $391K | ﹤0.01% |
+22,987
| New | +$486K |
|
4162
CALL
AllianceBernstein
AB
$3.46B
| $390K | ﹤0.01% |
8,000
-12,500
| -61% | -$654K |
|
4163
PUT
Alkermes
ALKS
$8.08B
| $390K | ﹤0.01% |
16,800
+400
| +2% | +$10.5K |
|
4164
PUT
Nektar Therapeutics
NKTR
$2.39B
| $390K | ﹤0.01% |
1,927
+774
| +67% | +$168K |
|
4165
PUT
Portillo's
PTLO
$343M
| $390K | ﹤0.01% |
+10,400
| New | +$417K |
|
4166
PUT
BRC Group Holdings
RILY
$264M
| $390K | ﹤0.01% |
4,400
+3,100
| +238% | +$227K |
|
4167
Reliance Steel & Aluminium
RS
$20.6B
| $390K | ﹤0.01% |
+2,405
| New | +$372K |
|
|
TVRD
4168
CALL
Tvardi Therapeutics
TVRD
$19.9M
| $390K | ﹤0.01% |
892
-811
| -48% | -$408K |
|
|
VIEW
4169
CALL
DELISTED
View, Inc. Class A Common Stock
VIEW
| $390K | ﹤0.01% |
1,663
-3,582
| -68% | -$1.03M |
|
|
VXRT
4170
CALL
DELISTED
Vaxart
VXRT
| $389K | ﹤0.01% |
62,200
-314,500
| -83% | -$2.15M |
|
|
AVCT
4171
CALL
DELISTED
American Virtual Cloud Technologies, Inc. Common Stock
AVCT
| $389K | ﹤0.01% |
10,680
+8,160
| +324% | +$246K |
|
4172
CALL
Aviat Networks
AVNW
$254M
| $388K | ﹤0.01% |
12,100
+7,000
| +137% | +$219K |
|
4173
Coeur Mining
CDE
$15B
| $388K | ﹤0.01% |
77,006
-12,295
| -14% | -$73.9K |
|
4174
PUT
Rigel Pharmaceuticals
RIGL
$726M
| $388K | ﹤0.01% |
14,650
-5,950
| -29% | -$180K |
|
4175
American Superconductor
AMSC
$1.29B
| $387K | ﹤0.01% |
35,653
+14,156
| +66% | +$204K |
|
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.