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 | |
|---|---|---|---|---|---|---|
4501
Seer Inc
SEER
$122M
| $313K | ﹤0.01% |
+13,732
| New | +$396K |
|
|
TRTN
4502
PUT
DELISTED
Triton International Limited
TRTN
| $313K | ﹤0.01% |
5,200
-6,600
| -56% | -$384K |
|
4503
Amplify Travel Tech ETF
AWAY
$26.1M
| $312K | ﹤0.01% |
12,829
-15,482
| -55% | -$409K |
|
4504
Direxion Daily MSCI Brazil Bull 2X ETF
BRZU
$105M
| $312K | ﹤0.01% |
4,706
+2,654
| +129% | +$191K |
|
4505
PUT
Orion
OEC
$381M
| $312K | ﹤0.01% |
17,000
+16,800
| +8,400% | +$313K |
|
4506
PUT
Offerpad Solutions
OPAD
$18.3M
| $312K | ﹤0.01% |
+326
| New | +$374K |
|
4507
Riot Platforms
RIOT
$7.63B
| $312K | ﹤0.01% |
14,000
-2,741
| -16% | -$81.6K |
|
4508
CALL
Unum
UNM
$13.6B
| $312K | ﹤0.01% |
12,700
-13,400
| -51% | -$343K |
|
4509
PUT
InfraCap MLP ETF
AMZA
$470M
| $311K | ﹤0.01% |
12,200
+8,200
| +205% | +$219K |
|
4510
Enbridge
ENB
$119B
| $311K | ﹤0.01% |
7,979
-13,058
| -62% | -$524K |
|
4511
CALL
Herbalife
HLF
$1.29B
| $311K | ﹤0.01% |
7,600
-15,200
| -67% | -$632K |
|
|
FUV
4512
PUT
DELISTED
Arcimoto, Inc. Common Stock
FUV
| $311K | ﹤0.01% |
2,005
-600
| -23% | -$123K |
|
|
CD
4513
CALL
DELISTED
Chindata Group Holdings Limited American Depositary Shares
CD
| $311K | ﹤0.01% |
47,200
+25,800
| +121% | +$221K |
|
|
CZOO
4514
PUT
DELISTED
Cazoo Group Ltd
CZOO
| $311K | ﹤0.01% |
+26
| New | +$402K |
|
|
AZEK
4515
DELISTED
The AZEK Co
AZEK
| $309K | ﹤0.01% |
+6,684
| New | +$266K |
|
4516
PUT
Lightwave Logic
LWLG
$995M
| $309K | ﹤0.01% |
+20,800
| New | +$274K |
|
|
ORC
4517
PUT
Orchid Island Capital
ORC
$1.3B
| $309K | ﹤0.01% |
13,740
+6,340
| +86% | +$152K |
|
4518
PUT
Dover
DOV
$27.6B
| $308K | ﹤0.01% |
1,700
+1,200
| +240% | +$204K |
|
4519
CALL
Emergent Biosolutions
EBS
$373M
| $308K | ﹤0.01% |
7,100
+4,600
| +184% | +$208K |
|
4520
CALL
Ondas Inc
ONDS
$4.27B
| $308K | ﹤0.01% |
+46,000
| New | +$394K |
|
4521
PUT
Open Text
OTEX
$6.15B
| $308K | ﹤0.01% |
6,500
+5,000
| +333% | +$246K |
|
4522
Rogers Communications
RCI
$18.3B
| $308K | ﹤0.01% |
6,481
+424
| +7% | +$19.9K |
|
4523
PUT
Champion Homes
SKY
$4.37B
| $308K | ﹤0.01% |
3,900
+3,600
| +1,200% | +$260K |
|
|
SGFY
4524
DELISTED
Signify Health, Inc.
SGFY
| $308K | ﹤0.01% |
+21,668
| New | +$335K |
|
4525
LivaNova
LIVN
$4.4B
| $307K | ﹤0.01% |
3,516
+3,046
| +648% | +$254K |
|
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.