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 | |
|---|---|---|---|---|---|---|
4176
CALL
IMAX
IMAX
$2.66B
| $387K | ﹤0.01% |
21,700
+2,200
| +11% | +$42.2K |
|
4177
PUT
Renaissance IPO ETF
IPO
$149M
| $387K | ﹤0.01% |
6,700
-69,300
| -91% | -$4.4M |
|
4178
CALL
Lisata Therapeutics
LSTA
$10.3M
| $387K | ﹤0.01% |
30,660
+10,320
| +51% | +$159K |
|
|
SOHU
4179
CALL
Sohu.com
SOHU
$355M
| $387K | ﹤0.01% |
23,800
+1,300
| +6% | +$24.5K |
|
4180
PUT
Spruce Power Holding Corp
SPRU
$35.8M
| $387K | ﹤0.01% |
14,638
-237
| -2% | -$9.16K |
|
|
CIO
4181
DELISTED
City Office REIT
CIO
| $386K | ﹤0.01% |
+19,602
| New | +$360K |
|
4182
CALL
Liberty Broadband Class C
LBRDK
$4.89B
| $386K | ﹤0.01% |
2,400
+100
| +4% | +$16.5K |
|
4183
PUT
US Foods
USFD
$22.5B
| $386K | ﹤0.01% |
11,100
+1,700
| +18% | +$59.2K |
|
|
TE
4184
T1 Energy
TE
$1.04B
| $386K | ﹤0.01% |
+34,584
| New | +$374K |
|
|
RWT
4185
CALL
Redwood Trust
RWT
$587M
| $385K | ﹤0.01% |
29,200
-14,600
| -33% | -$197K |
|
4186
PUT
American Superconductor
AMSC
$1.29B
| $384K | ﹤0.01% |
35,300
-75,300
| -68% | -$1.09M |
|
4187
CALL
Community Health Systems
CYH
$385M
| $384K | ﹤0.01% |
28,900
-1,000
| -3% | -$12.6K |
|
4188
EPR Properties
EPR
$4.9B
| $384K | ﹤0.01% |
8,104
-29,793
| -79% | -$1.48M |
|
4189
PUT
Global X MSCI Norway ETF
NORW
$86.2M
| $384K | ﹤0.01% |
17,500
+12,500
| +250% | +$389K |
|
4190
PUT
SPS Commerce
SPSC
$2.54B
| $384K | ﹤0.01% |
+2,700
| New | +$405K |
|
|
INFN
4191
CALL
DELISTED
Infinera Corporation Common Stock
INFN
| $384K | ﹤0.01% |
40,100
-81,800
| -67% | -$693K |
|
4192
CALL
Broadridge
BR
$18.4B
| $383K | ﹤0.01% |
2,100
-11,600
| -85% | -$2.04M |
|
|
LADR
4193
CALL
Ladder Capital
LADR
$1.24B
| $383K | ﹤0.01% |
32,000
-9,000
| -22% | -$107K |
|
|
HGEN
4194
CALL
DELISTED
HUMANIGEN, INC.
HGEN
| $383K | ﹤0.01% |
103,100
+87,700
| +569% | +$513K |
|
|
VLDR
4195
DELISTED
Velodyne Lidar, Inc. Common Stock
VLDR
| $383K | ﹤0.01% |
82,722
+24,759
| +43% | +$145K |
|
4196
PUT
Bionano Genomics
BNGO
$12.4M
| $382K | ﹤0.01% |
213
-267
| -56% | -$714K |
|
4197
CALL
Edison International
EIX
$30.3B
| $382K | ﹤0.01% |
5,600
-12,200
| -69% | -$774K |
|
4198
CALL
Acuity Brands
AYI
$9.95B
| $381K | ﹤0.01% |
1,800
-10,000
| -85% | -$2.07M |
|
|
GTLS
4199
DELISTED
Chart Industries
GTLS
| $381K | ﹤0.01% |
2,392
+2,305
| +2,649% | +$407K |
|
4200
CALL
Halozyme
HALO
$9.91B
| $381K | ﹤0.01% |
9,500
-33,100
| -78% | -$1.24M |
|
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.