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 | |
|---|---|---|---|---|---|---|
5251
Vericel Corp
VCEL
$2.35B
| $193K | ﹤0.01% |
4,915
+3,609
| +276% | +$158K |
|
|
LFTR
5252
PUT
DELISTED
Lefteris Acquisition Corp. Class A Common Stock
LFTR
| $193K | ﹤0.01% |
19,700
-25,400
| -56% | -$249K |
|
5253
PUT
Amphenol
APH
$198B
| $192K | ﹤0.01% |
4,400
-15,400
| -78% | -$623K |
|
|
FPI
5254
PUT
Farmland Partners
FPI
$408M
| $192K | ﹤0.01% |
16,100
+1,800
| +13% | +$21.4K |
|
5255
PUT
Liberty Energy
LBRT
$3.05B
| $192K | ﹤0.01% |
19,800
+1,900
| +11% | +$22.1K |
|
5256
CALL
Maravai LifeSciences
MRVI
$969M
| $192K | ﹤0.01% |
4,600
+1,700
| +59% | +$68.9K |
|
5257
PUT
Onto Innovation
ONTO
$12.9B
| $192K | ﹤0.01% |
1,900
+1,800
| +1,800% | +$155K |
|
5258
CALL
Pebblebrook Hotel Trust
PEB
$2.15B
| $192K | ﹤0.01% |
8,600
+5,600
| +187% | +$126K |
|
|
UXIN
5259
CALL
Uxin Ltd
UXIN
$306M
| $192K | ﹤0.01% |
1,218
-2,604
| -68% | -$560K |
|
|
ERF
5260
DELISTED
Enerplus Corporation
ERF
| $192K | ﹤0.01% |
18,220
+9,484
| +109% | +$92K |
|
|
IDEX
5261
PUT
DELISTED
Ideanomics, Inc. Common Stock
IDEX
| $192K | ﹤0.01% |
1,285
-681
| -35% | -$145K |
|
|
PRTY
5262
PUT
DELISTED
Party City Holdco Inc.
PRTY
| $192K | ﹤0.01% |
34,600
-2,900
| -8% | -$19.2K |
|
5263
CALL
Beam Therapeutics
BEAM
$2.63B
| $191K | ﹤0.01% |
2,400
-10,500
| -81% | -$899K |
|
|
KYNB
5264
CALL
Kyntra Bio
KYNB
$27.2M
| $191K | ﹤0.01% |
544
-3,392
| -86% | -$1.06M |
|
5265
CALL
Genius Sports
GENI
$1.85B
| $191K | ﹤0.01% |
25,200
-273,100
| -92% | -$3.68M |
|
5266
PUT
O-I Glass
OI
$1.1B
| $191K | ﹤0.01% |
15,900
-2,000
| -11% | -$25.3K |
|
5267
CALL
Patria Investments
PAX
$1.75B
| $191K | ﹤0.01% |
11,800
+7,700
| +188% | +$132K |
|
5268
CALL
Cartesian Therapeutics
RNAC
$229M
| $191K | ﹤0.01% |
1,960
+453
| +30% | +$48.7K |
|
5269
CALL
Shoals Technologies Group
SHLS
$1.47B
| $191K | ﹤0.01% |
7,900
-42,200
| -84% | -$1.21M |
|
|
TGB
5270
CALL
Trekor Metals
TGB
$2.48B
| $191K | ﹤0.01% |
+93,500
| New | +$195K |
|
|
OTMO
5271
CALL
DELISTED
Otonomo Technologies Ltd. Ordinary shares
OTMO
| $191K | ﹤0.01% |
+3,113
| New | +$197K |
|
|
RDUS
5272
CALL
DELISTED
Radius Health, Inc.
RDUS
| $191K | ﹤0.01% |
27,700
+12,900
| +87% | +$189K |
|
5273
BARK
BARK
$81.8M
| $190K | ﹤0.01% |
2,263
-5,076
| -69% | -$582K |
|
5274
PUT
Black Hills Corp
BKH
$5.42B
| $190K | ﹤0.01% |
2,700
+2,100
| +350% | +$139K |
|
5275
Hannon Armstrong Sustainable Infrastructure Capital
HASI
$4.84B
| $190K | ﹤0.01% |
+3,577
| New | +$207K |
|
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.