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 | |
|---|---|---|---|---|---|---|
|
ACOR
8226
PUT
DELISTED
Acorda Therapeutics
ACOR
| $23K | ﹤0.01% |
485
-455
| -48% | -$31.4K |
|
|
MNTV
8227
PUT
DELISTED
Momentive Global Inc. Common Stock
MNTV
| $23K | ﹤0.01% |
1,100
-13,300
| -92% | -$293K |
|
|
DTEA
8228
CALL
DELISTED
DAVIDsTEA Inc. Common Stock
DTEA
| $23K | ﹤0.01% |
7,600
-76,900
| -91% | -$272K |
|
|
EPZM
8229
CALL
DELISTED
Epizyme, Inc
EPZM
| $23K | ﹤0.01% |
9,400
+6,700
| +248% | +$26.3K |
|
|
COR
8230
PUT
DELISTED
Coresite Realty Corporation
COR
| $23K | ﹤0.01% |
+40,200
| New | +$6.36M |
|
|
NTP
8231
CALL
DELISTED
Nam Tai Property Inc.
NTP
| $23K | ﹤0.01% |
2,300
-27,600
| -92% | -$549K |
|
|
ADTX
8232
PUT
DELISTED
ADITXT INC
ADTX
| – | – |
0
| – | – |
|
8233
CALL
Airgain
AIRG
$71.1M
| $22K | ﹤0.01% |
2,100
-4,500
| -68% | -$48.4K |
|
8234
CALL
Arlo Technologies
ARLO
$1.58B
| $22K | ﹤0.01% |
2,100
-18,300
| -90% | -$143K |
|
|
AVNS
8235
DELISTED
Avanos Medical
AVNS
| $22K | ﹤0.01% |
638
+528
| +480% | +$17.1K |
|
8236
PUT
Axogen
AXGN
$2.2B
| $22K | ﹤0.01% |
2,400
+100
| +4% | +$1.2K |
|
|
FABC
8237
Fabric.AI Inc
FABC
$15.7M
| $22K | ﹤0.01% |
111
-14
| -11% | -$4.51K |
|
|
BCTX
8238
Briacell Therapeutics
BCTX
$29.6M
| $22K | ﹤0.01% |
+18
| New | +$23.6K |
|
8239
PUT
BioXcel Therapeutics
BTAI
$24.8M
| $22K | ﹤0.01% |
69
-94
| -58% | -$40.3K |
|
8240
Diamondrock Hospitality Co
DRH
$2.69B
| $22K | ﹤0.01% |
2,299
-17,395
| -88% | -$164K |
|
8241
Ecopetrol
EC
$33.7B
| $22K | ﹤0.01% |
+1,749
| New | +$25K |
|
8242
CALL
Enanta Pharmaceuticals
ENTA
$362M
| $22K | ﹤0.01% |
300
+200
| +200% | +$15.7K |
|
8243
Evogene
EVGN
$5.83M
| $22K | ﹤0.01% |
1,361
+43
| +3% | +$976 |
|
8244
JFrog
FROG
$8.88B
| $22K | ﹤0.01% |
758
-2,864
| -79% | -$94.4K |
|
|
GIFI
8245
DELISTED
Gulf Island Fabrication
GIFI
| $22K | ﹤0.01% |
+5,679
| New | +$23.1K |
|
8246
Genasys
GNSS
$76.5M
| $22K | ﹤0.01% |
5,735
+3,061
| +114% | +$14.1K |
|
8247
CALL
Idacorp
IDA
$8B
| $22K | ﹤0.01% |
200
-1,400
| -88% | -$149K |
|
8248
PUT
InflaRx
IFRX
$243M
| $22K | ﹤0.01% |
4,700
-10,500
| -69% | -$42.2K |
|
8249
CALL
KALA BIO
KALA
$12.5M
| $22K | ﹤0.01% |
8
+7
| +700% | +$32.5K |
|
8250
PUT
Kforce
KFRC
$1.05B
| $22K | ﹤0.01% |
300
-300
| -50% | -$21.5K |
|
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.