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 | |
|---|---|---|---|---|---|---|
|
ZGNX
1801
DELISTED
Zogenix, Inc.
ZGNX
| $2.5M | ﹤0.01% |
153,860
+120,093
| +356% | +$1.76M |
|
1802
CrowdStrike
CRWD
$187B
| $2.5M | ﹤0.01% |
+48,804
| New | +$2.97M |
|
1803
PUT
iShares Convertible Bond ETF
ICVT
$7.23B
| $2.5M | ﹤0.01% |
75,100
-71,500
| -49% | -$6.96M |
|
1804
CALL
Cirrus Logic
CRUS
$6.74B
| $2.49M | ﹤0.01% |
27,100
+21,100
| +352% | +$1.75M |
|
1805
CALL
JB Hunt Transport Services
JBHT
$27.1B
| $2.49M | ﹤0.01% |
12,200
-7,800
| -39% | -$1.5M |
|
1806
NextEra Energy
NEE
$187B
| $2.49M | ﹤0.01% |
26,713
-23,386
| -47% | -$2.02M |
|
1807
CALL
Gerdau
GGB
$9.44B
| $2.49M | ﹤0.01% |
638,190
+233,604
| +58% | +$888K |
|
1808
PUT
Vulcan Materials
VMC
$36.3B
| $2.49M | ﹤0.01% |
12,000
-2,900
| -19% | -$562K |
|
1809
PUT
Weibo
WB
$1.9B
| $2.49M | ﹤0.01% |
80,300
+38,200
| +91% | +$1.55M |
|
1810
T. Rowe Price
TROW
$25B
| $2.49M | ﹤0.01% |
+12,645
| New | +$2.57M |
|
1811
PUT
AerCap
AER
$23.9B
| $2.48M | ﹤0.01% |
38,000
+17,800
| +88% | +$1.1M |
|
|
NEWR
1812
DELISTED
New Relic, Inc.
NEWR
| $2.48M | ﹤0.01% |
22,571
-4,770
| -17% | -$460K |
|
1813
CALL
Incyte
INCY
$23.5B
| $2.48M | ﹤0.01% |
33,800
+20,600
| +156% | +$1.39M |
|
|
MRTX
1814
CALL
DELISTED
Mirati Therapeutics, Inc. Common Stock
MRTX
| $2.48M | ﹤0.01% |
16,900
+7,600
| +82% | +$1.18M |
|
|
JMIA
1815
CALL
Jumia Technologies
JMIA
$726M
| $2.48M | ﹤0.01% |
217,300
-75,100
| -26% | -$1.17M |
|
1816
CALL
VF Corp
VFC
$6.68B
| $2.47M | ﹤0.01% |
33,800
+12,000
| +55% | +$877K |
|
1817
CALL
Cooper Companies
COO
$13.7B
| $2.47M | ﹤0.01% |
23,600
+22,400
| +1,867% | +$2.28M |
|
1818
PUT
American Express Global Business Travel
GBTG
$4.91B
| $2.47M | ﹤0.01% |
+250,100
| New | +$2.46M |
|
1819
CALL
C3.ai
AI
$1.27B
| $2.46M | ﹤0.01% |
78,800
-70,800
| -47% | -$2.87M |
|
|
NNDM
1820
PUT
Nano Dimension
NNDM
$309M
| $2.46M | ﹤0.01% |
647,800
+165,900
| +34% | +$842K |
|
1821
CALL
Camping World
CWH
$363M
| $2.46M | ﹤0.01% |
60,900
+13,400
| +28% | +$541K |
|
1822
PUT
Kinross Gold
KGC
$28.5B
| $2.46M | ﹤0.01% |
423,400
-73,700
| -15% | -$441K |
|
|
FRC
1823
CALL
DELISTED
First Republic Bank
FRC
| $2.46M | ﹤0.01% |
11,900
+2,100
| +21% | +$443K |
|
1824
PUT
Vodafone
VOD
$34.9B
| $2.45M | ﹤0.01% |
164,400
+100
| +0.1% | +$1.53K |
|
1825
PUT
Corsair Gaming
CRSR
$1.05B
| $2.45M | ﹤0.01% |
116,700
-18,700
| -14% | -$447K |
|
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.