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 | |
|---|---|---|---|---|---|---|
4101
CALL
Clearway Energy Class C
CWEN
$4.79B
| $407K | ﹤0.01% |
11,500
-8,500
| -43% | -$300K |
|
4102
CALL
ING
ING
$92.9B
| $407K | ﹤0.01% |
29,300
+2,700
| +10% | +$39.2K |
|
|
HIBB
4103
DELISTED
Hibbett, Inc. Common Stock
HIBB
| $407K | ﹤0.01% |
+5,661
| New | +$451K |
|
4104
Affiliated Managers Group
AMG
$9.51B
| $406K | ﹤0.01% |
+2,474
| New | +$415K |
|
4105
PUT
Heron Therapeutics
HRTX
$93.4M
| $406K | ﹤0.01% |
44,500
+38,100
| +595% | +$389K |
|
4106
CALL
LSB Industries
LXU
$824M
| $406K | ﹤0.01% |
36,820
-21,290
| -37% | -$202K |
|
4107
PUT
Senseonics Holdings Inc
SENS
$254M
| $406K | ﹤0.01% |
7,620
-12,670
| -62% | -$823K |
|
|
SILV
4108
PUT
DELISTED
SilverCrest Metals Inc. Common Shares
SILV
| $406K | ﹤0.01% |
51,400
-30,900
| -38% | -$251K |
|
4109
CALL
Aterian
ATER
$4.07M
| $405K | ﹤0.01% |
8,225
-3,100
| -27% | -$229K |
|
4110
Eagle Materials
EXP
$6.49B
| $405K | ﹤0.01% |
2,439
-1,122
| -32% | -$172K |
|
4111
PUT
Pacific Biosciences
PACB
$435M
| $405K | ﹤0.01% |
19,800
-50,200
| -72% | -$1.21M |
|
|
MCFE
4112
DELISTED
McAfee Corp. Class A Common Stock
MCFE
| $405K | ﹤0.01% |
15,733
+5,943
| +61% | +$143K |
|
|
MITT
4113
TPG Mortgage Investment Trust
MITT
$228M
| $404K | ﹤0.01% |
39,464
-24,459
| -38% | -$277K |
|
|
CLPR
4114
PUT
Clipper Realty
CLPR
$46.4M
| $403K | ﹤0.01% |
+40,600
| New | +$364K |
|
4115
PUT
Navient
NAVI
$819M
| $403K | ﹤0.01% |
19,000
-4,800
| -20% | -$97K |
|
|
RWT
4116
Redwood Trust
RWT
$588M
| $403K | ﹤0.01% |
30,591
-35,696
| -54% | -$483K |
|
|
DRE
4117
DELISTED
Duke Realty Corp.
DRE
| $403K | ﹤0.01% |
6,151
+5,751
| +1,438% | +$332K |
|
4118
CALL
Zai Lab
ZLAB
$2.07B
| $402K | ﹤0.01% |
6,400
+6,300
| +6,300% | +$534K |
|
|
RRD
4119
DELISTED
RR Donnelley & Sons Co.
RRD
| $402K | ﹤0.01% |
35,781
-21,461
| -37% | -$186K |
|
|
AHT
4120
PUT
Ashford Hospitality Trust
AHT
$20.8M
| $401K | ﹤0.01% |
4,180
-41,810
| -91% | -$5.21M |
|
|
ANSS
4121
PUT
DELISTED
Ansys
ANSS
| $401K | ﹤0.01% |
1,000
-5,600
| -85% | -$2.15M |
|
4122
CALL
WisdomTree
WT
$2.79B
| $401K | ﹤0.01% |
65,600
+60,100
| +1,093% | +$372K |
|
4123
PUT
Arch Capital
ACGL
$36.5B
| $400K | ﹤0.01% |
9,000
+6,300
| +233% | +$267K |
|
|
API
4124
CALL
Agora
API
$333M
| $400K | ﹤0.01% |
24,700
-1,900
| -7% | -$42.1K |
|
4125
CareDx
CDNA
$1.83B
| $400K | ﹤0.01% |
+8,801
| New | +$459K |
|
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.