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 | |
|---|---|---|---|---|---|---|
1051
PUT
Middleby
MIDD
$6B
| $6.39M | 0.01% |
32,500
+31,200
| +2,400% | +$5.69M |
|
1052
Snap
SNAP
$7.28B
| $6.38M | 0.01% |
135,573
-146,595
| -52% | -$8.25M |
|
1053
CALL
Royal Bank of Canada
RY
$290B
| $6.36M | 0.01% |
59,900
-100,000
| -63% | -$10.4M |
|
1054
PENN Entertainment
PENN
$2.76B
| $6.35M | 0.01% |
+122,456
| New | +$7.42M |
|
1055
BHP
BHP
$211B
| $6.34M | 0.01% |
117,865
+113,417
| +2,550% | +$5.67M |
|
1056
CALL
Invesco CurrencyShares Euro Currency Trust
FXE
$331M
| $6.34M | 0.01% |
60,000
+20,400
| +52% | +$2.17M |
|
1057
Teladoc Health
TDOC
$1.57B
| $6.33M | 0.01% |
+68,925
| New | +$8.24M |
|
1058
CALL
Sabre
SABR
$660M
| $6.32M | 0.01% |
735,500
-90,400
| -11% | -$867K |
|
|
1059
PUT
Sabre
SABR
$660M
| $6.31M | 0.01% |
734,500
+136,800
| +23% | +$1.31M |
|
1060
CALL
Alnylam Pharmaceuticals
ALNY
$36.2B
| $6.31M | 0.01% |
37,200
+11,500
| +45% | +$2.14M |
|
|
SPWR
1061
PUT
DELISTED
SunPower Corporation Common Stock
SPWR
| $6.3M | 0.01% |
303,700
+211,200
| +228% | +$5.71M |
|
1062
CALL
Martin Marietta Materials
MLM
$33.3B
| $6.3M | 0.01% |
14,300
+9,400
| +192% | +$3.81M |
|
1063
Western Digital
WDC
$180B
| $6.28M | 0.01% |
127,501
+127,369
| +96,492% | +$5.53M |
|
1064
iShares iBoxx $ Investment Grade Corporate Bond ETF
LQD
$34.7B
| $6.28M | 0.01% |
+47,398
| New | +$6.3M |
|
|
FSR
1065
PUT
DELISTED
Fisker Inc.
FSR
| $6.26M | 0.01% |
398,300
+271,100
| +213% | +$4.69M |
|
|
SPR
1066
PUT
DELISTED
Spirit AeroSystems
SPR
| $6.26M | 0.01% |
145,300
+16,500
| +13% | +$707K |
|
1067
iShares Russell 2000 Growth ETF
IWO
$14.4B
| $6.25M | 0.01% |
+21,341
| New | +$6.43M |
|
1068
NVIDIA
NVDA
$5.03T
| $6.25M | 0.01% |
212,620
-388,480
| -65% | -$10.7M |
|
1069
US Global Jets ETF
JETS
$793M
| $6.23M | 0.01% |
295,587
+216,629
| +274% | +$4.83M |
|
1070
CALL
Exelon
EXC
$49B
| $6.23M | 0.01% |
151,276
+3,645
| +2% | +$137K |
|
1071
CALL
Trip.com Group
TCOM
$27.5B
| $6.22M | 0.01% |
252,500
+177,400
| +236% | +$5.02M |
|
|
DAY
1072
PUT
DELISTED
Dayforce
DAY
| $6.21M | 0.01% |
59,500
+42,300
| +246% | +$4.85M |
|
|
HOLX
1073
PUT
DELISTED
Hologic
HOLX
| $6.2M | 0.01% |
81,000
+65,600
| +426% | +$4.82M |
|
1074
CALL
Alexandria Real Estate Equities
ARE
$8.76B
| $6.2M | 0.01% |
27,800
+21,600
| +348% | +$4.47M |
|
|
MTTR
1075
CALL
DELISTED
Matterport, Inc. Class A Common Stock
MTTR
| $6.18M | 0.01% |
+299,700
| New | +$6.86M |
|
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.