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 | |
|---|---|---|---|---|---|---|
|
RCM
3876
CALL
DELISTED
R1 RCM Inc. Common Stock
RCM
| $476K | ﹤0.01% |
18,700
-24,800
| -57% | -$594K |
|
3877
CALL
Titan International
TWI
$530M
| $475K | ﹤0.01% |
43,400
+32,700
| +306% | +$257K |
|
3878
CALL
Verra Mobility
VRRM
$635M
| $475K | ﹤0.01% |
30,800
-2,600
| -8% | -$39.4K |
|
|
STFC
3879
PUT
DELISTED
State Auto Financial Corp
STFC
| $475K | ﹤0.01% |
+9,200
| New | +$473K |
|
3880
PUT
Bit Digital
BTBT
$459M
| $474K | ﹤0.01% |
78,100
+59,200
| +313% | +$566K |
|
3881
CALL
Celularity
CELU
$22M
| $474K | ﹤0.01% |
+9,260
| New | +$592K |
|
3882
PUT
Payoneer
PAYO
$2.42B
| $474K | ﹤0.01% |
64,600
+11,500
| +22% | +$88.4K |
|
|
SNP
3883
DELISTED
CHINA PETROLEUM & CHEMICAL CORPORATION ADS (REP 100 ORDINARY H SHARES)
SNP
| $474K | ﹤0.01% |
10,198
+3,898
| +62% | +$189K |
|
3884
PUT
Sphere 3D
ANY
$16.8M
| $473K | ﹤0.01% |
+2,169
| New | +$841K |
|
3885
CALL
AXT Inc
AXTI
$2.8B
| $473K | ﹤0.01% |
53,700
+38,100
| +244% | +$322K |
|
3886
PUT
Trex
TREX
$4.57B
| $472K | ﹤0.01% |
3,500
-6,900
| -66% | -$828K |
|
3887
CALL
Beyond Air
XAIR
$3.93M
| $472K | ﹤0.01% |
125
+17
| +16% | +$75.9K |
|
|
JO
3888
DELISTED
iPath Series B Bloomberg Coffee Subindex Total ReturnSM ETN
JO
| $472K | ﹤0.01% |
7,713
-21,548
| -74% | -$1.3M |
|
3889
PUT
Teradata
TDC
$2.75B
| $471K | ﹤0.01% |
11,100
-4,500
| -29% | -$222K |
|
|
CHX
3890
CALL
DELISTED
ChampionX
CHX
| $470K | ﹤0.01% |
23,300
-9,200
| -28% | -$216K |
|
3891
VanEck Steel ETF
SLX
$167M
| $470K | ﹤0.01% |
8,839
-6,670
| -43% | -$368K |
|
|
ABK
3892
CALL
DELISTED
Ambac Financial Group
ABK
| $470K | ﹤0.01% |
29,300
-5,600
| -16% | -$89.8K |
|
3893
CALL
Bank OZK
OZK
$5.62B
| $469K | ﹤0.01% |
10,100
-46,700
| -82% | -$2.13M |
|
3894
CALL
Workiva
WK
$3.28B
| $469K | ﹤0.01% |
3,600
+1,900
| +112% | +$268K |
|
|
APTS
3895
CALL
DELISTED
Preferred Apartment Communities, Inc.
APTS
| $469K | ﹤0.01% |
26,000
-10,200
| -28% | -$140K |
|
|
CIM
3896
Chimera Investment
CIM
$1.06B
| $468K | ﹤0.01% |
10,356
-4,803
| -32% | -$227K |
|
3897
Guidewire Software
GWRE
$13.3B
| $468K | ﹤0.01% |
+4,129
| New | +$490K |
|
3898
Rush Street Interactive
RSI
$3.16B
| $468K | ﹤0.01% |
28,407
+5,022
| +21% | +$94.7K |
|
3899
CALL
TechTarget
TTGT
$323M
| $468K | ﹤0.01% |
4,900
+2,200
| +81% | +$207K |
|
|
BIOR
3900
PUT
DELISTED
Biora Therapeutics, Inc. Common Stock
BIOR
| $468K | ﹤0.01% |
897
+842
| +1,531% | +$604K |
|
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.