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 | |
|---|---|---|---|---|---|---|
9551
E.W. Scripps
SSP
$274M
| $5K | ﹤0.01% |
304
-809
| -73% | -$15.6K |
|
9552
CALL
Stantec
STN
$7.69B
| $5K | ﹤0.01% |
+100
| New | +$5.4K |
|
9553
PUT
Strategic Education
STRA
$1.71B
| $5K | ﹤0.01% |
100
-600
| -86% | -$37.6K |
|
9554
PUT
Sterling Infrastructure
STRL
$20.3B
| $5K | ﹤0.01% |
200
-19,800
| -99% | -$509K |
|
9555
CALL
Savara
SVRA
$1.13B
| $5K | ﹤0.01% |
4,100
-73,800
| -95% | -$87.8K |
|
|
TGNA
9556
PUT
DELISTED
TEGNA Inc
TGNA
| $5K | ﹤0.01% |
300
-1,000
| -77% | -$20K |
|
9557
Target Hospitality
TH
$1.61B
| $5K | ﹤0.01% |
1,491
+1,215
| +440% | +$4.68K |
|
9558
PUT
Turkcell
TKC
$4.84B
| $5K | ﹤0.01% |
1,400
+800
| +133% | +$3.2K |
|
9559
CALL
ReposiTrak
TRAK
$148M
| $5K | ﹤0.01% |
1,000
-3,700
| -79% | -$21.1K |
|
9560
Twist Bioscience
TWST
$5.62B
| $5K | ﹤0.01% |
72
-668
| -90% | -$68.6K |
|
9561
United States Antimony
UAMY
$766M
| $5K | ﹤0.01% |
+10,183
| New | +$7.49K |
|
9562
PUT
Procure Space ETF
UFO
$620M
| $5K | ﹤0.01% |
200
-100
| -33% | -$2.92K |
|
|
UHT
9563
PUT
Universal Health Realty Income Trust
UHT
$608M
| $5K | ﹤0.01% |
100
-200
| -67% | -$11.6K |
|
|
UMH
9564
PUT
UMH Properties
UMH
$1.32B
| $5K | ﹤0.01% |
200
-1,500
| -88% | -$36.1K |
|
9565
CALL
UroGen Pharma
URGN
$2B
| $5K | ﹤0.01% |
+600
| New | +$8.46K |
|
9566
PUT
VEON
VEON
$3.53B
| $5K | ﹤0.01% |
120
+28
| +30% | +$1.36K |
|
9567
Worthington Enterprises
WOR
$2.76B
| $5K | ﹤0.01% |
+149
| New | +$4.9K |
|
|
WPRT
9568
CALL
Westport Fuel Systems
WPRT
$36.4M
| $5K | ﹤0.01% |
230
-6,740
| -97% | -$193K |
|
9569
CALL
WSFS Financial
WSFS
$4.1B
| $5K | ﹤0.01% |
+100
| New | +$5.24K |
|
|
9570
PUT
WSFS Financial
WSFS
$4.1B
| $5K | ﹤0.01% |
+100
| New | +$5.24K |
|
9571
Select Water Solutions
WTTR
$2.51B
| $5K | ﹤0.01% |
897
-1,349
| -60% | -$8.39K |
|
9572
Xencor
XNCR
$1.44B
| $5K | ﹤0.01% |
140
-151
| -52% | -$5.72K |
|
9573
XWELL
XWEL
$8.87M
| $5K | ﹤0.01% |
130
| – | – |
|
9574
CALL
cbdMD
YCBD
$5.65M
| $5K | ﹤0.01% |
14
-58
| -81% | -$33.7K |
|
|
TBRG
9575
DELISTED
TruBridge
TBRG
| $5K | ﹤0.01% |
+196
| New | +$6.4K |
|
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.