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 | |
|---|---|---|---|---|---|---|
4551
CALL
Intrepid Potash
IPI
$456M
| $303K | ﹤0.01% |
7,100
+1,700
| +31% | +$72.3K |
|
4552
Manchester United
MANU
$3.97B
| $303K | ﹤0.01% |
21,331
-42,974
| -67% | -$677K |
|
4553
PUT
Oscar Health
OSCR
$9.41B
| $303K | ﹤0.01% |
38,600
+5,700
| +17% | +$71.6K |
|
4554
PUT
Teucrium Soybean Fund
SOYB
$61M
| $303K | ﹤0.01% |
15,700
-14,500
| -48% | -$317K |
|
|
TGB
4555
Trekor Metals
TGB
$2.48B
| $303K | ﹤0.01% |
147,922
+51,535
| +53% | +$108K |
|
|
MYOV
4556
PUT
DELISTED
Myovant Sciences Ltd.
MYOV
| $303K | ﹤0.01% |
19,500
-15,300
| -44% | -$292K |
|
|
REGI
4557
DELISTED
Renewable Energy Group, Inc.
REGI
| $303K | ﹤0.01% |
+7,154
| New | +$365K |
|
4558
DigitalOcean
DOCN
$13.7B
| $302K | ﹤0.01% |
+3,766
| New | +$353K |
|
4559
PUT
Funko
FNKO
$326M
| $302K | ﹤0.01% |
16,100
+12,600
| +360% | +$224K |
|
4560
Gerdau
GGB
$9.74B
| $302K | ﹤0.01% |
+77,484
| New | +$294K |
|
4561
PUT
Icahn Enterprises
IEP
$5.24B
| $302K | ﹤0.01% |
6,100
-8,500
| -58% | -$452K |
|
|
CCEC
4562
Capital Clean Energy Carriers
CCEC
$1.34B
| $302K | ﹤0.01% |
18,759
-25,539
| -58% | -$375K |
|
4563
Clearwater Paper
CLW
$339M
| $301K | ﹤0.01% |
8,213
+4,980
| +154% | +$199K |
|
4564
PUT
Dole
DOLE
$1.35B
| $301K | ﹤0.01% |
+22,600
| New | +$316K |
|
4565
CALL
Impinj
PI
$4.62B
| $301K | ﹤0.01% |
3,400
-3,400
| -50% | -$247K |
|
4566
PUT
Spire Global
SPIR
$444M
| $301K | ﹤0.01% |
+11,163
| New | +$452K |
|
|
GMS
4567
PUT
DELISTED
GMS Inc
GMS
| $300K | ﹤0.01% |
5,000
-13,700
| -73% | -$740K |
|
|
LX
4568
PUT
LexinFintech Holdings
LX
$241M
| $300K | ﹤0.01% |
77,900
-135,200
| -63% | -$673K |
|
4569
TransDigm Group
TDG
$70.2B
| $300K | ﹤0.01% |
472
-1,071
| -69% | -$671K |
|
4570
CALL
XPEL
XPEL
$1.22B
| $300K | ﹤0.01% |
4,400
-30,000
| -87% | -$2.16M |
|
|
TE
4571
PUT
T1 Energy
TE
$1.16B
| $300K | ﹤0.01% |
+26,900
| New | +$291K |
|
|
WIRE
4572
CALL
DELISTED
Encore Wire Corp
WIRE
| $300K | ﹤0.01% |
2,100
-700
| -25% | -$90.6K |
|
4573
Atea Pharmaceuticals
AVIR
$376M
| $299K | ﹤0.01% |
+33,535
| New | +$523K |
|
4574
PUT
Centrus Energy
LEU
$3.48B
| $299K | ﹤0.01% |
6,000
-36,000
| -86% | -$2M |
|
4575
Perion Network
PERI
$375M
| $299K | ﹤0.01% |
12,453
-32,606
| -72% | -$796K |
|
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.