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 | |
|---|---|---|---|---|---|---|
|
SOL
4626
DELISTED
Emeren Group
SOL
| $289K | ﹤0.01% |
48,544
+4,367
| +10% | +$31.2K |
|
4627
Aecom
ACM
$9.3B
| $288K | ﹤0.01% |
3,726
+2,645
| +245% | +$186K |
|
4628
CALL
Century Aluminum
CENX
$4.43B
| $288K | ﹤0.01% |
17,400
+4,300
| +33% | +$62.9K |
|
4629
CALL
Omnicell
OMCL
$1.61B
| $288K | ﹤0.01% |
1,600
-14,000
| -90% | -$2.43M |
|
4630
Invesco S&P 500 Equal Weight Technology ETF
RSPT
$5.49B
| $288K | ﹤0.01% |
+8,890
| New | +$275K |
|
|
SF
4631
CALL
Stifel
SF
$12.6B
| $288K | ﹤0.01% |
6,150
-42,450
| -87% | -$2.06M |
|
4632
CALL
SK Telecom
SKM
$12.1B
| $288K | ﹤0.01% |
10,800
+10,739
| +17,605% | +$496K |
|
4633
PUT
Clear Secure
YOU
$5.57B
| $288K | ﹤0.01% |
+9,200
| New | +$340K |
|
|
DOMA
4634
CALL
DELISTED
Doma Holdings, Inc.
DOMA
| $288K | ﹤0.01% |
+2,272
| New | +$351K |
|
|
AIV
4635
PUT
Aimco
AIV
$387M
| $287K | ﹤0.01% |
37,300
-12,200
| -25% | -$93.2K |
|
4636
American Tower
AMT
$80.8B
| $287K | ﹤0.01% |
982
-32,177
| -97% | -$8.79M |
|
4637
Moody's
MCO
$82.8B
| $287K | ﹤0.01% |
735
-548
| -43% | -$211K |
|
4638
CALL
Newegg Commerce
NEGG
$279M
| $287K | ﹤0.01% |
1,385
+1,380
| +27,600% | +$390K |
|
|
EAR
4639
CALL
DELISTED
Eargo, Inc. Common Stock
EAR
| $287K | ﹤0.01% |
2,815
+275
| +11% | +$35.8K |
|
4640
PUT
Clearwater Paper
CLW
$339M
| $286K | ﹤0.01% |
7,800
+5,200
| +200% | +$207K |
|
4641
Icahn Enterprises
IEP
$5.24B
| $286K | ﹤0.01% |
5,780
-6,554
| -53% | -$349K |
|
|
HEP
4642
PUT
DELISTED
Holly Energy Partners, L.P.
HEP
| $286K | ﹤0.01% |
17,400
+10,200
| +142% | +$181K |
|
4643
CALL
Core Laboratories
CLB
$488M
| $285K | ﹤0.01% |
12,800
+4,800
| +60% | +$125K |
|
|
DSL
4644
PUT
DoubleLine Income Solutions Fund
DSL
$1.22B
| $285K | ﹤0.01% |
17,700
-24,900
| -58% | -$426K |
|
|
LPRO
4645
CALL
Open Lending Corp
LPRO
| $285K | ﹤0.01% |
12,700
-36,500
| -74% | -$1.03M |
|
4646
CALL
POSCO
PKX
$16.1B
| $285K | ﹤0.01% |
4,900
+1,200
| +32% | +$74.6K |
|
|
VRNT
4647
DELISTED
Verint Systems
VRNT
| $285K | ﹤0.01% |
5,439
+51
| +0.9% | +$2.45K |
|
4648
CALL
Xeris Biopharma Holdings
XERS
$1.39B
| $285K | ﹤0.01% |
97,500
-55,500
| -36% | -$120K |
|
4649
PUT
XWELL
XWEL
$8.28M
| $285K | ﹤0.01% |
7,065
-370
| -5% | -$11.7K |
|
|
TGH
4650
DELISTED
Textainer Group Holdings limited
TGH
| $285K | ﹤0.01% |
+7,995
| New | +$290K |
|
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.