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 | |
|---|---|---|---|---|---|---|
5226
PUT
Graphic Packaging
GPK
$3.17B
| $196K | ﹤0.01% |
10,100
-14,700
| -59% | -$294K |
|
5227
N-able
NABL
$882M
| $196K | ﹤0.01% |
+17,683
| New | +$219K |
|
5228
CALL
Vanguard S&P 500 Value ETF
VOOV
$6.59B
| $196K | ﹤0.01% |
700
+600
| +600% | +$88.3K |
|
5229
CALL
Angi Inc
ANGI
$229M
| $195K | ﹤0.01% |
2,120
-130
| -6% | -$14.1K |
|
5230
ICU Medical
ICUI
$4.21B
| $195K | ﹤0.01% |
822
+269
| +49% | +$62.8K |
|
5231
LSB Industries
LXU
$783M
| $195K | ﹤0.01% |
+17,702
| New | +$168K |
|
5232
CALL
Portland General Electric
POR
$5.8B
| $195K | ﹤0.01% |
3,700
-2,700
| -42% | -$135K |
|
5233
PUT
Prospect Capital
PSEC
$1.07B
| $195K | ﹤0.01% |
23,300
+7,000
| +43% | +$58.9K |
|
5234
CALL
RadNet
RDNT
$5.02B
| $195K | ﹤0.01% |
6,500
-400
| -6% | -$11.8K |
|
5235
ProShares UltraPro Short 20+ Year Treasury
TTT
$19.5M
| $195K | ﹤0.01% |
6,322
-15,479
| -71% | -$499K |
|
5236
PUT
Energous
WATT
$77.6M
| $195K | ﹤0.01% |
260
-68
| -21% | -$70.3K |
|
|
CHS
5237
PUT
DELISTED
Chicos FAS, Inc.
CHS
| $195K | ﹤0.01% |
36,400
-6,900
| -16% | -$37.6K |
|
5238
PUT
German American Bancorp
GABC
$1.91B
| $194K | ﹤0.01% |
+5,000
| New | +$200K |
|
5239
PUT
Ironwood Pharmaceuticals
IRWD
$696M
| $194K | ﹤0.01% |
16,700
-5,000
| -23% | -$61.3K |
|
5240
PUT
loanDepot
LDI
$532M
| $194K | ﹤0.01% |
+40,500
| New | +$237K |
|
|
OLP
5241
PUT
One Liberty Properties
OLP
$530M
| $194K | ﹤0.01% |
5,500
+700
| +15% | +$23.2K |
|
5242
PUT
Steris
STE
$22.3B
| $194K | ﹤0.01% |
800
+500
| +167% | +$114K |
|
|
EVLO
5243
DELISTED
Evelo Biosciences, Inc. Common Stock
EVLO
| $194K | ﹤0.01% |
1,605
+1,601
| +40,025% | +$270K |
|
|
HYRE
5244
CALL
DELISTED
HyreCar Inc. Common Stock
HYRE
| $194K | ﹤0.01% |
41,400
+10,900
| +36% | +$68.1K |
|
5245
PUT
Brookfield
BN
$104B
| $193K | ﹤0.01% |
50,470
+41,749
| +479% | +$1.32M |
|
5246
PUT
Granite Construction
GVA
$5.29B
| $193K | ﹤0.01% |
5,000
+1,300
| +35% | +$51.6K |
|
5247
iShares Self-Driving EV and Tech ETF
IDRV
$125M
| $193K | ﹤0.01% |
+3,570
| New | +$190K |
|
5248
CALL
Old National Bancorp
ONB
$10.2B
| $193K | ﹤0.01% |
10,700
+700
| +7% | +$12.5K |
|
5249
Children's Place
PLCE
$54.3M
| $193K | ﹤0.01% |
2,437
-181
| -7% | -$15.9K |
|
5250
CALL
Twist Bioscience
TWST
$5.7B
| $193K | ﹤0.01% |
2,500
+800
| +47% | +$82.1K |
|
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.