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 | |
|---|---|---|---|---|---|---|
4851
CALL
Eastern Bankshares
EBC
$5.26B
| $248K | ﹤0.01% |
12,300
-76,000
| -86% | -$1.58M |
|
4852
CALL
Leidos
LDOS
$14.5B
| $248K | ﹤0.01% |
2,800
-11,700
| -81% | -$1.1M |
|
4853
CALL
abrdn Physical Silver Shares ETF
SIVR
$4.02B
| $248K | ﹤0.01% |
11,100
-1,300
| -10% | -$29.3K |
|
4854
Veru
VERU
$36M
| $248K | ﹤0.01% |
4,216
+3,257
| +340% | +$249K |
|
|
VLD
4855
CALL
DELISTED
Velo3D, Inc.
VLD
| $248K | ﹤0.01% |
+909
| New | +$301K |
|
|
SGFY
4856
PUT
DELISTED
Signify Health, Inc.
SGFY
| $248K | ﹤0.01% |
17,500
+14,800
| +548% | +$229K |
|
4857
PUT
Arcturus Therapeutics
ARCT
$164M
| $247K | ﹤0.01% |
6,700
-4,800
| -42% | -$196K |
|
4858
Digi International
DGII
$2.63B
| $247K | ﹤0.01% |
10,066
+9,341
| +1,288% | +$214K |
|
4859
PUT
Healthcare Realty
HR
$7.28B
| $247K | ﹤0.01% |
7,400
-4,400
| -37% | -$147K |
|
|
CMBT
4860
CMB.TECH NV
CMBT
$4.69B
| $247K | ﹤0.01% |
+27,896
| New | +$272K |
|
|
PLAN
4861
CALL
DELISTED
Anaplan, Inc.
PLAN
| $247K | ﹤0.01% |
5,400
-18,700
| -78% | -$1.03M |
|
|
JJC
4862
DELISTED
iPath Series B Bloomberg Copper Subindex Total ReturnSM ETN
JJC
| $247K | ﹤0.01% |
+11,086
| New | +$244K |
|
4863
Arista Networks
ANET
$227B
| $246K | ﹤0.01% |
6,864
-46,080
| -87% | -$1.37M |
|
4864
CALL
Brixmor Property Group
BRX
$9.67B
| $246K | ﹤0.01% |
9,700
+7,000
| +259% | +$168K |
|
4865
PUT
Everest Group
EG
$14.5B
| $246K | ﹤0.01% |
900
-700
| -44% | -$189K |
|
4866
Eldorado Gold
EGO
$7.87B
| $246K | ﹤0.01% |
26,414
-24,513
| -48% | -$226K |
|
|
IGMS
4867
CALL
DELISTED
IGM Biosciences
IGMS
| $246K | ﹤0.01% |
8,400
+5,300
| +171% | +$263K |
|
4868
CALL
OceanFirst Financial
OCFC
$1.68B
| $246K | ﹤0.01% |
11,100
+10,600
| +2,120% | +$231K |
|
|
SAGE
4869
DELISTED
Sage Therapeutics
SAGE
| $246K | ﹤0.01% |
5,783
-6,896
| -54% | -$289K |
|
|
XELA
4870
PUT
DELISTED
Exela Technologies, Inc. Common Stock
XELA
| $246K | ﹤0.01% |
+70
| New | +$411K |
|
4871
PUT
Vanguard Total Bond Market
BND
$157B
| $245K | ﹤0.01% |
2,900
-14,900
| -84% | -$1.27M |
|
4872
CALL
Navigator Holdings
NVGS
$1.38B
| $245K | ﹤0.01% |
27,700
+15,100
| +120% | +$132K |
|
|
ECHO
4873
CALL
EchoStar
ECHO
$24.4B
| $245K | ﹤0.01% |
9,300
-23,600
| -72% | -$623K |
|
|
4874
abrdn Physical Silver Shares ETF
SIVR
$4.02B
| $245K | ﹤0.01% |
10,963
+1,244
| +13% | +$28K |
|
4875
CALL
LendingTree
TREE
$447M
| $245K | ﹤0.01% |
2,000
-7,500
| -79% | -$997K |
|
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.