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 | |
|---|---|---|---|---|---|---|
1826
Sonos
SONO
$1.75B
| $2.45M | ﹤0.01% |
82,161
+62,048
| +308% | +$1.97M |
|
1827
CALL
Omnicom Group
OMC
$22.7B
| $2.45M | ﹤0.01% |
33,400
+12,600
| +61% | +$896K |
|
|
GREE
1828
Vulcan Infrastructure and Power Inc. Class A Common Stock
GREE
| $2.45M | ﹤0.01% |
+15,245
| New | +$3.2M |
|
1829
CALL
Bit Digital
BTBT
$484M
| $2.44M | ﹤0.01% |
401,500
+385,400
| +2,394% | +$3.69M |
|
1830
CALL
International Flavors & Fragrances
IFF
$19.4B
| $2.44M | ﹤0.01% |
16,200
-2,200
| -12% | -$320K |
|
1831
CALL
Champion Homes
SKY
$4.48B
| $2.44M | ﹤0.01% |
30,900
+23,800
| +335% | +$1.72M |
|
1832
CALL
Royalty Pharma
RPRX
$26.1B
| $2.44M | ﹤0.01% |
61,200
+29,500
| +93% | +$1.15M |
|
|
SPLK
1833
DELISTED
Splunk Inc
SPLK
| $2.43M | ﹤0.01% |
21,001
-63,330
| -75% | -$8.85M |
|
1834
CALL
Protolabs
PRLB
$1.86B
| $2.43M | ﹤0.01% |
47,300
+26,200
| +124% | +$1.55M |
|
1835
PUT
Equitable Holdings
EQH
$13.1B
| $2.43M | ﹤0.01% |
74,000
+55,900
| +309% | +$1.83M |
|
|
LSI
1836
DELISTED
Life Storage, Inc.
LSI
| $2.43M | ﹤0.01% |
15,842
+8,706
| +122% | +$1.16M |
|
1837
PUT
First Horizon
FHN
$12.1B
| $2.42M | ﹤0.01% |
148,200
+52,100
| +54% | +$869K |
|
1838
CALL
Weibo
WB
$1.9B
| $2.42M | ﹤0.01% |
78,100
+41,600
| +114% | +$1.69M |
|
1839
CALL
Thor Industries
THO
$3.99B
| $2.42M | ﹤0.01% |
23,300
+4,400
| +23% | +$477K |
|
1840
PUT
Xcel Energy
XEL
$51B
| $2.42M | ﹤0.01% |
35,700
+24,600
| +222% | +$1.6M |
|
1841
PUT
FerroAtlántica
GSM
$628M
| $2.42M | ﹤0.01% |
388,900
+155,500
| +67% | +$1.06M |
|
|
VRNT
1842
PUT
DELISTED
Verint Systems
VRNT
| $2.42M | ﹤0.01% |
46,000
+31,000
| +207% | +$1.49M |
|
1843
CALL
Americold
COLD
$4.09B
| $2.41M | ﹤0.01% |
73,600
+14,100
| +24% | +$436K |
|
1844
CALL
Qiagen
QGEN
$8.53B
| $2.41M | ﹤0.01% |
40,929
+6,696
| +20% | +$384K |
|
1845
Floor & Decor
FND
$5.81B
| $2.41M | ﹤0.01% |
18,514
+14,082
| +318% | +$1.81M |
|
1846
CALL
Vanguard Total Bond Market
BND
$157B
| $2.41M | ﹤0.01% |
28,500
+17,900
| +169% | +$1.52M |
|
|
AXON
1847
PUT
Axon Enterprise
AXON
$40.5B
| $2.4M | ﹤0.01% |
15,300
-14,700
| -49% | -$2.47M |
|
1848
CSX Corp
CSX
$98.6B
| $2.4M | ﹤0.01% |
63,908
+63,529
| +16,762% | +$2.24M |
|
1849
CALL
Ingersoll Rand
IR
$33B
| $2.4M | ﹤0.01% |
38,800
+300
| +0.8% | +$17.1K |
|
1850
PUT
American Water Works
AWK
$26.3B
| $2.4M | ﹤0.01% |
12,700
-8,300
| -40% | -$1.45M |
|
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.