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 | |
|---|---|---|---|---|---|---|
2351
ZTO Express
ZTO
$18.2B
| $1.5M | ﹤0.01% |
53,036
+43,456
| +454% | +$1.3M |
|
|
BCM
2352
PUT
DELISTED
iPath Pure Beta Broad Commodity ETN
BCM
| $1.5M | ﹤0.01% |
+63,700
| New | +$2.47M |
|
2353
Canadian Solar
CSIQ
$906M
| $1.49M | ﹤0.01% |
47,761
+12,320
| +35% | +$441K |
|
2354
CALL
Outdoor Holding Co
POWW
$239M
| $1.49M | ﹤0.01% |
274,300
+83,500
| +44% | +$510K |
|
2355
CALL
Equity Residential
EQR
$25.4B
| $1.49M | ﹤0.01% |
16,500
-20,900
| -56% | -$1.8M |
|
2356
CALL
L3Harris
LHX
$55.9B
| $1.49M | ﹤0.01% |
7,000
-14,200
| -67% | -$3.15M |
|
2357
CALL
ThredUp
TDUP
$736M
| $1.49M | ﹤0.01% |
117,000
+95,400
| +442% | +$1.74M |
|
|
LNW
2358
CALL
DELISTED
Light & Wonder
LNW
| $1.49M | ﹤0.01% |
22,300
-22,400
| -50% | -$1.63M |
|
|
SAND
2359
CALL
DELISTED
Sandstorm Gold
SAND
| $1.49M | ﹤0.01% |
240,100
-7,100
| -3% | -$44.4K |
|
|
SKX
2360
CALL
DELISTED
Skechers
SKX
| $1.49M | ﹤0.01% |
34,300
+6,800
| +25% | +$305K |
|
2361
CALL
Marriott Vacations Worldwide
VAC
$3.24B
| $1.49M | ﹤0.01% |
8,800
+4,900
| +126% | +$787K |
|
2362
PUT
PBF Energy
PBF
$7.29B
| $1.49M | ﹤0.01% |
114,600
+62,800
| +121% | +$870K |
|
2363
CALL
Archer Aviation
ACHR
$3.64B
| $1.49M | ﹤0.01% |
+245,900
| New | +$1.63M |
|
|
DCP
2364
CALL
DELISTED
DCP Midstream, LP
DCP
| $1.48M | ﹤0.01% |
54,000
-69,300
| -56% | -$2.01M |
|
2365
CALL
Sturm, Ruger & Co
RGR
$610M
| $1.48M | ﹤0.01% |
21,800
-100
| -0.5% | -$7.26K |
|
2366
Global X Copper Miners ETF NEW
COPX
$7.13B
| $1.48M | ﹤0.01% |
40,130
+16,708
| +71% | +$612K |
|
2367
Liberty Broadband Class C
LBRDK
$4.15B
| $1.48M | ﹤0.01% |
+9,194
| New | +$1.51M |
|
2368
CALL
Certara
CERT
$1.17B
| $1.48M | ﹤0.01% |
+52,100
| New | +$1.75M |
|
2369
Sarepta Therapeutics
SRPT
$1.66B
| $1.48M | ﹤0.01% |
16,443
-2,268
| -12% | -$194K |
|
2370
CALL
MGIC Investment
MTG
$6.27B
| $1.48M | ﹤0.01% |
102,600
-12,800
| -11% | -$194K |
|
2371
Crown Holdings
CCK
$12.8B
| $1.48M | ﹤0.01% |
13,369
+8,644
| +183% | +$919K |
|
|
SLCA
2372
PUT
DELISTED
U.S. SILICA HOLDINGS, INC.
SLCA
| $1.48M | ﹤0.01% |
157,300
-13,300
| -8% | -$133K |
|
|
WBT
2373
DELISTED
Welbilt, Inc.
WBT
| $1.48M | ﹤0.01% |
62,221
+15,610
| +33% | +$370K |
|
2374
Veeva Systems
VEEV
$30.3B
| $1.48M | ﹤0.01% |
+5,783
| New | +$1.68M |
|
2375
CALL
AeroVironment
AVAV
$7.57B
| $1.48M | ﹤0.01% |
23,800
+15,500
| +187% | +$1.26M |
|
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.