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 | |
|---|---|---|---|---|---|---|
|
ABB
1776
CALL
DELISTED
ABB Ltd
ABB
| $2.58M | ﹤0.01% |
67,500
-165,700
| -71% | -$5.81M |
|
|
STOR
1777
CALL
DELISTED
STORE Capital Corporation
STOR
| $2.57M | ﹤0.01% |
74,600
+1,300
| +2% | +$44.1K |
|
|
CFLT
1778
PUT
DELISTED
Confluent
CFLT
| $2.56M | ﹤0.01% |
+33,600
| New | +$2.42M |
|
|
GES
1779
PUT
DELISTED
Guess Inc
GES
| $2.56M | ﹤0.01% |
108,100
+61,700
| +133% | +$1.37M |
|
1780
Equifax
EFX
$20.3B
| $2.56M | ﹤0.01% |
8,734
+6,214
| +247% | +$1.73M |
|
1781
CALL
Vulcan Materials
VMC
$36.3B
| $2.55M | ﹤0.01% |
12,300
-3,900
| -24% | -$755K |
|
1782
CALL
LivaNova
LIVN
$4.3B
| $2.55M | ﹤0.01% |
29,200
+28,800
| +7,200% | +$2.4M |
|
1783
CALL
State Street SPDR Portfolio Europe ETF
SPEU
$712M
| $2.54M | ﹤0.01% |
55,100
-43,500
| -44% | -$1.84M |
|
1784
CALL
BioCryst Pharmaceuticals
BCRX
$2.37B
| $2.54M | ﹤0.01% |
183,400
-70,200
| -28% | -$929K |
|
1785
CALL
International Paper
IP
$22.3B
| $2.54M | ﹤0.01% |
105,800
+13,611
| +15% | +$671K |
|
1786
Charles River Laboratories
CRL
$10.9B
| $2.54M | ﹤0.01% |
+6,740
| New | +$2.62M |
|
1787
CALL
Axsome Therapeutics
AXSM
$12.4B
| $2.54M | ﹤0.01% |
67,200
+61,800
| +1,144% | +$2.27M |
|
1788
PUT
Box
BOX
$4.02B
| $2.54M | ﹤0.01% |
96,900
+82,200
| +559% | +$2.12M |
|
1789
PUT
QuidelOrtho
QDEL
$1.09B
| $2.54M | ﹤0.01% |
18,800
-4,200
| -18% | -$585K |
|
1790
PUT
Floor & Decor
FND
$5.81B
| $2.54M | ﹤0.01% |
19,500
-43,800
| -69% | -$5.64M |
|
1791
CALL
Sprout Social
SPT
$455M
| $2.53M | ﹤0.01% |
27,900
+19,800
| +244% | +$2.24M |
|
1792
PUT
Corpay
CPAY
$24.2B
| $2.53M | ﹤0.01% |
11,300
-17,600
| -61% | -$4.2M |
|
1793
CALL
RPM International
RPM
$13.7B
| $2.52M | ﹤0.01% |
25,000
+19,700
| +372% | +$1.79M |
|
1794
CALL
KE Holdings
BEKE
$16.8B
| $2.52M | ﹤0.01% |
125,300
-71,100
| -36% | -$1.46M |
|
1795
CALL
Globe Life
GL
$13.5B
| $2.52M | ﹤0.01% |
26,900
+22,600
| +526% | +$2.09M |
|
|
ACB
1796
CALL
Aurora Cannabis
ACB
$165M
| $2.52M | ﹤0.01% |
66,920
+43,495
| +186% | +$2.93M |
|
|
DM
1797
DELISTED
Desktop Metal, Inc.
DM
| $2.52M | ﹤0.01% |
50,823
+43,791
| +623% | +$2.95M |
|
|
CONE
1798
CALL
DELISTED
CyrusOne Inc Common Stock
CONE
| $2.51M | ﹤0.01% |
28,000
+15,200
| +119% | +$1.29M |
|
1799
KB Home
KBH
$3.48B
| $2.51M | ﹤0.01% |
56,064
-21,956
| -28% | -$919K |
|
1800
CALL
Pultegroup
PHM
$24.5B
| $2.5M | ﹤0.01% |
43,800
+12,500
| +40% | +$641K |
|
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.