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 | |
|---|---|---|---|---|---|---|
7251
PUT
CAE Inc. Common Shares
CAE
$8.3B
| $50K | ﹤0.01% |
2,000
+200
| +11% | +$5.58K |
|
7252
PUT
Clearfield
CLFD
$411M
| $50K | ﹤0.01% |
600
-7,900
| -93% | -$496K |
|
7253
CALL
ClearSign Technologies
CLIR
$24.3M
| $50K | ﹤0.01% |
3,640
+1,980
| +119% | +$32.8K |
|
7254
PUT
Compass
COMP
$8.51B
| $50K | ﹤0.01% |
5,600
-9,100
| -62% | -$99.6K |
|
7255
Entravision Communication
EVC
$1.03B
| $50K | ﹤0.01% |
+7,506
| New | +$56.8K |
|
7256
PUT
The Greenbrier Companies
GBX
$1.52B
| $50K | ﹤0.01% |
1,100
-71,600
| -98% | -$3.11M |
|
7257
PUT
Gossamer Bio
GOSS
$82.9M
| $50K | ﹤0.01% |
4,500
+4,200
| +1,400% | +$49.9K |
|
7258
CALL
Heartland Express
HTLD
$948M
| $50K | ﹤0.01% |
3,000
+2,400
| +400% | +$40.3K |
|
7259
CALL
Jack Henry & Associates
JKHY
$10.9B
| $50K | ﹤0.01% |
300
-2,700
| -90% | -$437K |
|
7260
PUT
Kiniksa Pharmaceuticals
KNSA
$5.8B
| $50K | ﹤0.01% |
4,300
-37,200
| -90% | -$457K |
|
7261
CALL
Kite Realty
KRG
$5.81B
| $50K | ﹤0.01% |
2,300
+1,900
| +475% | +$40.7K |
|
7262
PUT
LifeMD
LFMD
$169M
| $50K | ﹤0.01% |
13,100
-99,400
| -88% | -$470K |
|
|
MGIC
7263
CALL
DELISTED
Magic Software Enterprises
MGIC
| $50K | ﹤0.01% |
2,400
-13,300
| -85% | -$289K |
|
7264
PUT
Nomura Holdings
NMR
$28.3B
| $50K | ﹤0.01% |
11,700
-4,600
| -28% | -$20.9K |
|
|
ORGN
7265
PUT
DELISTED
Origin Materials
ORGN
| $50K | ﹤0.01% |
260
-1,637
| -86% | -$324K |
|
7266
CALL
PRA Group
PRAA
$663M
| $50K | ﹤0.01% |
1,000
-7,200
| -88% | -$320K |
|
7267
Ring Energy
REI
$315M
| $50K | ﹤0.01% |
22,121
-69,177
| -76% | -$214K |
|
7268
CALL
Retractable Technologies
RVP
$19.8M
| $50K | ﹤0.01% |
7,300
-3,400
| -32% | -$29.3K |
|
7269
Boston Beer
SAM
$1.91B
| $50K | ﹤0.01% |
+100
| New | +$49.9K |
|
7270
PUT
Sun Life Financial
SLF
$46B
| $50K | ﹤0.01% |
900
-36,700
| -98% | -$2.03M |
|
7271
CALL
Sensient Technologies
SXT
$5.26B
| $50K | ﹤0.01% |
+500
| New | +$48.6K |
|
7272
PUT
Target Hospitality
TH
$1.51B
| $50K | ﹤0.01% |
+14,100
| New | +$54.3K |
|
7273
PUT
Titan Machinery
TITN
$396M
| $50K | ﹤0.01% |
1,500
-1,100
| -42% | -$34.2K |
|
7274
PUT
Valaris Ltd Warrants
VAL.WS
$684M
| $50K | ﹤0.01% |
1,400
-1,500
| -52% | -$5.11K |
|
|
DOOR
7275
DELISTED
MASONITE INTERNATIONAL CORP
DOOR
| $50K | ﹤0.01% |
+427
| New | +$48.9K |
|
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.