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 | |
|---|---|---|---|---|---|---|
1076
CALL
Snap-on
SNA
$21B
| $6.18M | 0.01% |
28,700
+28,200
| +5,640% | +$6.02M |
|
1077
PUT
Teradyne
TER
$54.7B
| $6.18M | 0.01% |
37,800
+22,600
| +149% | +$3.18M |
|
|
SBNY
1078
CALL
DELISTED
Signature Bank
SBNY
| $6.18M | 0.01% |
19,100
+10,900
| +133% | +$3.4M |
|
1079
CALL
Agnico Eagle Mines
AEM
$72.5B
| $6.17M | 0.01% |
116,200
-17,900
| -13% | -$951K |
|
|
MRSH
1080
PUT
Marsh
MRSH
$86.2B
| $6.15M | 0.01% |
35,400
+22,500
| +174% | +$3.74M |
|
|
PPLC
1081
PUT
DELISTED
PortfolioPlus S&P 500 ETF
PPLC
| $6.15M | 0.01% |
139,500
-23,100
| -14% | -$1.02M |
|
1082
CALL
Aflac
AFL
$63.8B
| $6.15M | 0.01% |
105,300
+55,200
| +110% | +$3.09M |
|
1083
CALL
JFrog
FROG
$9.71B
| $6.15M | 0.01% |
207,000
+159,100
| +332% | +$5.24M |
|
1084
PUT
Deutsche Bank
DB
$66.4B
| $6.14M | 0.01% |
490,900
+112,600
| +30% | +$1.43M |
|
1085
CALL
United Natural Foods
UNFI
$3B
| $6.12M | 0.01% |
124,700
-31,200
| -20% | -$1.51M |
|
1086
PUT
Invesco CurrencyShares Japanese Yen Trust
FXY
$423M
| $6.12M | 0.01% |
75,100
+72,100
| +2,403% | +$5.96M |
|
1087
PUT
Sarepta Therapeutics
SRPT
$1.67B
| $6.1M | 0.01% |
67,700
+29,500
| +77% | +$2.52M |
|
1088
CALL
Stratasys
SSYS
$697M
| $6.09M | 0.01% |
248,900
+45,600
| +22% | +$1.27M |
|
1089
PUT
MarketAxess Holdings
MKTX
$4.14B
| $6.09M | 0.01% |
14,800
+10,700
| +261% | +$4.22M |
|
1090
CALL
American International
AIG
$41.9B
| $6.08M | 0.01% |
107,000
-19,000
| -15% | -$1.08M |
|
1091
PUT
Nutrien
NTR
$32.8B
| $6.08M | 0.01% |
80,800
+34,300
| +74% | +$2.4M |
|
1092
CALL
Tandem Diabetes Care
TNDM
$1.18B
| $6.05M | 0.01% |
40,200
-35,100
| -47% | -$4.74M |
|
|
BNY
1093
PUT
Bank of New York Mellon
BNY
$108B
| $6.04M | 0.01% |
104,000
+58,900
| +131% | +$3.39M |
|
|
GES
1094
DELISTED
Guess Inc
GES
| $6.04M | 0.01% |
+254,950
| New | +$5.65M |
|
1095
CALL
Prologis
PLD
$137B
| $6.03M | 0.01% |
35,800
-52,300
| -59% | -$7.81M |
|
1096
PUT
VF Corp
VFC
$6.71B
| $6.02M | 0.01% |
82,200
+43,300
| +111% | +$3.16M |
|
1097
PUT
Applovin
APP
$132B
| $6.01M | 0.01% |
63,800
+47,800
| +299% | +$4.45M |
|
1098
PUT
Teck Resources
TECK
$29.6B
| $6.01M | 0.01% |
208,400
-171,200
| -45% | -$4.7M |
|
1099
PUT
Vanguard Consumer Discretionary ETF
VCR
$5.84B
| $6M | 0.01% |
21,200
+1,000
| +5% | +$336K |
|
|
1100
PUT
Aflac
AFL
$63.8B
| $5.97M | 0.01% |
102,300
+68,500
| +203% | +$3.84M |
|
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.