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 | |
|---|---|---|---|---|---|---|
5776
JELD-WEN Holding
JELD
$153M
| $134K | ﹤0.01% |
+5,101
| New | +$132K |
|
5777
CALL
Privia Health
PRVA
$3.02B
| $134K | ﹤0.01% |
+5,200
| New | +$130K |
|
5778
CALL
Saia
SAIA
$9.87B
| $134K | ﹤0.01% |
+400
| New | +$124K |
|
5779
CALL
Seer Inc
SEER
$123M
| $134K | ﹤0.01% |
5,900
-2,200
| -27% | -$63.4K |
|
5780
PUT
LendingTree
TREE
$464M
| $134K | ﹤0.01% |
1,100
-100
| -8% | -$13.3K |
|
5781
PUT
Westlake Chemical Partners
WLKP
$751M
| $134K | ﹤0.01% |
5,000
+1,100
| +28% | +$27.3K |
|
5782
Cushman & Wakefield Ltd
CWK
$3.22B
| $133K | ﹤0.01% |
6,024
-4,741
| -44% | -$91.6K |
|
5783
Driven Brands
DRVN
$2.42B
| $133K | ﹤0.01% |
3,984
+2,914
| +272% | +$91.3K |
|
5784
Macerich
MAC
$7.25B
| $133K | ﹤0.01% |
7,747
+6,669
| +619% | +$125K |
|
5785
PUT
Masco
MAS
$15.2B
| $133K | ﹤0.01% |
1,900
-39,100
| -95% | -$2.53M |
|
|
ONTF
5786
PUT
DELISTED
ON24
ONTF
| $133K | ﹤0.01% |
+7,700
| New | +$137K |
|
5787
CALL
BRC Group Holdings
RILY
$305M
| $133K | ﹤0.01% |
1,500
-1,700
| -53% | -$124K |
|
|
UBX
5788
DELISTED
Unity Biotechnology
UBX
| $133K | ﹤0.01% |
+9,135
| New | +$200K |
|
5789
PUT
Unisys
UIS
$222M
| $133K | ﹤0.01% |
6,500
-4,400
| -40% | -$96.8K |
|
5790
Astrana Health
ASTH
$1.77B
| $133K | ﹤0.01% |
+1,822
| New | +$150K |
|
|
CMBT
5791
PUT
CMB.TECH NV
CMBT
$4.63B
| $133K | ﹤0.01% |
15,000
-15,500
| -51% | -$151K |
|
|
Y
5792
CALL
DELISTED
Alleghany Corp
Y
| $133K | ﹤0.01% |
200
+100
| +100% | +$66.6K |
|
|
Y
5793
PUT
DELISTED
Alleghany Corp
Y
| $133K | ﹤0.01% |
200
-400
| -67% | -$267K |
|
5794
GrafTech
EAF
$202M
| $132K | ﹤0.01% |
1,117
-6,715
| -86% | -$779K |
|
5795
Vertical Aerospace
EVTL
$172M
| $132K | ﹤0.01% |
+1,971
| New | +$185K |
|
5796
CALL
Haemonetics
HAE
$3.93B
| $132K | ﹤0.01% |
2,500
-18,000
| -88% | -$1.1M |
|
5797
CALL
Liberty Latin America Class C
LILAK
$1.67B
| $132K | ﹤0.01% |
12,540
-8,030
| -39% | -$88.5K |
|
|
MSB
5798
CALL
Mesabi Trust
MSB
$295M
| $132K | ﹤0.01% |
5,000
+3,500
| +233% | +$93.7K |
|
5799
NovaGold Resources
NG
$2.79B
| $132K | ﹤0.01% |
19,366
-35,721
| -65% | -$261K |
|
5800
Nu Skin
NUS
$259M
| $132K | ﹤0.01% |
+2,613
| New | +$116K |
|
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.