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 | |
|---|---|---|---|---|---|---|
|
TREC
8576
PUT
DELISTED
Trecora Resources
TREC
| $17K | ﹤0.01% |
2,200
-19,500
| -90% | -$161K |
|
8577
PUT
American Coastal Insurance
ACIC
$525M
| $16K | ﹤0.01% |
3,900
+1,400
| +56% | +$6.01K |
|
|
ADAP
8578
CALL
DELISTED
Adaptimmune Therapeutics
ADAP
| $16K | ﹤0.01% |
4,300
-19,500
| -82% | -$88.8K |
|
8579
PUT
Adecoagro
AGRO
$1.41B
| $16K | ﹤0.01% |
2,200
-7,200
| -77% | -$61K |
|
8580
PUT
Ameresco
AMRC
$1.02B
| $16K | ﹤0.01% |
200
-2,400
| -92% | -$192K |
|
8581
Atlanticus Holdings
ATLC
$1.57B
| $16K | ﹤0.01% |
+225
| New | +$15K |
|
8582
Avista
AVA
$3.43B
| $16K | ﹤0.01% |
400
| – | – |
|
8583
PUT
AXT Inc
AXTI
$2.6B
| $16K | ﹤0.01% |
1,900
-1,200
| -39% | -$10.1K |
|
8584
CALL
AZZ Inc
AZZ
$4.29B
| $16K | ﹤0.01% |
300
-600
| -67% | -$32.6K |
|
8585
Banner Corp
BANR
$2.39B
| $16K | ﹤0.01% |
270
-30
| -10% | -$1.77K |
|
|
BLRX
8586
BioLineRX
BLRX
$12.3M
| $16K | ﹤0.01% |
+206
| New | +$21.5K |
|
8587
PUT
Biomerica
BMRA
$4.85M
| $16K | ﹤0.01% |
538
-3,925
| -88% | -$151K |
|
8588
CALL
Bank of Hawaii
BOH
$3.16B
| $16K | ﹤0.01% |
200
-4,600
| -96% | -$387K |
|
|
8589
PUT
Bank of Hawaii
BOH
$3.16B
| $16K | ﹤0.01% |
200
-200
| -50% | -$16.8K |
|
8590
PUT
Bruker
BRKR
$9.43B
| $16K | ﹤0.01% |
200
+100
| +100% | +$8.02K |
|
|
SLAI
8591
DELISTED
SOLAI Ltd ADS
SLAI
| $16K | ﹤0.01% |
38
-94
| -71% | -$51.5K |
|
8592
PUT
Byrna Technologies
BYRN
$94.9M
| $16K | ﹤0.01% |
+1,200
| New | +$19.6K |
|
|
CLSD
8593
DELISTED
Clearside Biomedical
CLSD
| $16K | ﹤0.01% |
+401
| New | +$26K |
|
8594
PUT
Corvus Pharmaceuticals
CRVS
$1.1B
| $16K | ﹤0.01% |
6,700
+4,800
| +253% | +$18.6K |
|
|
DX
8595
PUT
Dynex Capital
DX
$3.19B
| $16K | ﹤0.01% |
1,000
-900
| -47% | -$15.6K |
|
8596
CALL
The Ensign Group
ENSG
$10.6B
| $16K | ﹤0.01% |
200
+100
| +100% | +$7.78K |
|
8597
PUT
Eos Energy Enterprises
EOSE
$1.18B
| $16K | ﹤0.01% |
2,200
-44,800
| -95% | -$455K |
|
|
FINV
8598
FinVolution Group
FINV
$1.2B
| $16K | ﹤0.01% |
3,352
-35,814
| -91% | -$208K |
|
|
FRSX
8599
PUT
Foresight Autonomous Holdings
FRSX
$3.67M
| $16K | ﹤0.01% |
79
-167
| -68% | -$53.2K |
|
|
FSP
8600
CALL
Franklin Street Properties
FSP
$50.3M
| $16K | ﹤0.01% |
2,800
+2,000
| +250% | +$11.2K |
|
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.