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 | |
|---|---|---|---|---|---|---|
|
DCH
5576
CALL
Dauch Corp
DCH
$1.37B
| $152K | ﹤0.01% |
16,300
-40,700
| -71% | -$389K |
|
5577
PUT
Caribou Biosciences
CRBU
$149M
| $152K | ﹤0.01% |
+10,100
| New | +$196K |
|
5578
CALL
CareTrust REIT
CTRE
$9.78B
| $152K | ﹤0.01% |
6,700
+5,400
| +415% | +$114K |
|
5579
PUT
Dana Inc
DAN
$2.97B
| $152K | ﹤0.01% |
6,700
+6,200
| +1,240% | +$144K |
|
5580
PUT
Freshpet
FRPT
$2.91B
| $152K | ﹤0.01% |
1,600
+1,100
| +220% | +$136K |
|
5581
PUT
Hyster-Yale Materials Handling
HY
$623M
| $152K | ﹤0.01% |
+3,700
| New | +$162K |
|
5582
CALL
International Bancshares
IBOC
$4.75B
| $152K | ﹤0.01% |
3,600
-600
| -14% | -$25.8K |
|
5583
CALL
MillerKnoll
MLKN
$1.62B
| $152K | ﹤0.01% |
3,900
-27,900
| -88% | -$1.09M |
|
5584
Smith Micro Software
SMSI
$14.9M
| $152K | ﹤0.01% |
776
-739
| -49% | -$162K |
|
|
ATCX
5585
CALL
DELISTED
Atlas Technical Consultants, Inc. Class A Common Stock
ATCX
| $152K | ﹤0.01% |
+18,100
| New | +$174K |
|
5586
CALL
Belden
BDC
$4.85B
| $151K | ﹤0.01% |
+2,300
| New | +$144K |
|
5587
PUT
Coca-Cola Europacific Partners
CCEP
$47.7B
| $151K | ﹤0.01% |
2,700
-2,600
| -49% | -$140K |
|
5588
PUT
Chord Energy
CHRD
$7.77B
| $151K | ﹤0.01% |
1,200
+700
| +140% | +$83.2K |
|
5589
CALL
Evolus
EOLS
$393M
| $151K | ﹤0.01% |
23,200
-17,300
| -43% | -$119K |
|
5590
PUT
Global Ship Lease
GSL
$1.59B
| $151K | ﹤0.01% |
+6,600
| New | +$151K |
|
5591
CALL
InflaRx
IFRX
$258M
| $151K | ﹤0.01% |
+31,900
| New | +$128K |
|
5592
Direxion Daily 7-10 Year Treasury Bear 3X ETF
TYO
$12.5M
| $151K | ﹤0.01% |
17,849
+16,165
| +960% | +$139K |
|
|
ZYNE
5593
CALL
DELISTED
Zynerba Pharmaceuticals, Inc
ZYNE
| $151K | ﹤0.01% |
52,600
-900
| -2% | -$3.33K |
|
|
MYOV
5594
DELISTED
Myovant Sciences Ltd.
MYOV
| $151K | ﹤0.01% |
9,737
-1,435
| -13% | -$27.4K |
|
|
MTOR
5595
DELISTED
MERITOR, Inc.
MTOR
| $151K | ﹤0.01% |
6,128
+1,148
| +23% | +$29.3K |
|
|
IBTX
5596
PUT
DELISTED
Independent Bank Group, Inc.
IBTX
| $151K | ﹤0.01% |
2,100
-2,200
| -51% | -$159K |
|
5597
Ambarella
AMBA
$3.65B
| $150K | ﹤0.01% |
+742
| New | +$138K |
|
|
BRY
5598
PUT
DELISTED
Berry Corp
BRY
| $150K | ﹤0.01% |
+17,900
| New | +$158K |
|
5599
CALL
Douglas Emmett
DEI
$1.98B
| $150K | ﹤0.01% |
4,500
+1,100
| +32% | +$37.2K |
|
5600
PUT
Edgewell Personal Care
EPC
$1.28B
| $150K | ﹤0.01% |
3,300
-4,200
| -56% | -$169K |
|
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.