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 | |
|---|---|---|---|---|---|---|
2101
CALL
Western Alliance Bancorporation
WAL
$9.07B
| $1.89M | ﹤0.01% |
17,600
-48,300
| -73% | -$5.44M |
|
2102
iShares MSCI Japan ETF
EWJ
$21.7B
| $1.89M | ﹤0.01% |
28,282
+2,785
| +11% | +$190K |
|
2103
PUT
Hecla Mining
HL
$10.2B
| $1.89M | ﹤0.01% |
361,900
+103,100
| +40% | +$576K |
|
|
PBFX
2104
CALL
DELISTED
PBF LOGISTICS LP
PBFX
| $1.89M | ﹤0.01% |
167,000
+92,700
| +125% | +$1.18M |
|
2105
Five Below
FIVE
$11.2B
| $1.89M | ﹤0.01% |
9,115
+3,662
| +67% | +$720K |
|
2106
CALL
Gogo Inc
GOGO
$515M
| $1.88M | ﹤0.01% |
139,300
-240,500
| -63% | -$3.57M |
|
|
SFIX
2107
PUT
Stitch Fix
SFIX
$478M
| $1.88M | ﹤0.01% |
99,500
+39,500
| +66% | +$1.13M |
|
2108
CALL
Mohawk Industries
MHK
$6.9B
| $1.88M | ﹤0.01% |
10,300
+2,600
| +34% | +$464K |
|
2109
PUT
Green Plains
GPRE
$1.19B
| $1.87M | ﹤0.01% |
53,900
-57,200
| -51% | -$2.13M |
|
|
FL
2110
DELISTED
Foot Locker
FL
| $1.87M | ﹤0.01% |
42,819
+24,642
| +136% | +$1.17M |
|
2111
CALL
Live Oak Bancshares
LOB
$1.95B
| $1.87M | ﹤0.01% |
21,400
-17,900
| -46% | -$1.49M |
|
2112
PUT
American Outdoor Brands
AOUT
$162M
| $1.87M | ﹤0.01% |
93,700
+54,300
| +138% | +$1.22M |
|
2113
CALL
Insulet
PODD
$11.3B
| $1.86M | ﹤0.01% |
7,000
-4,600
| -40% | -$1.33M |
|
2114
Paychex
PAYX
$40.4B
| $1.86M | ﹤0.01% |
+13,620
| New | +$1.68M |
|
2115
PUT
AeroVironment
AVAV
$7.57B
| $1.85M | ﹤0.01% |
29,900
+19,400
| +185% | +$1.58M |
|
2116
PUT
monday.com
MNDY
$3.27B
| $1.85M | ﹤0.01% |
6,000
+4,800
| +400% | +$1.64M |
|
|
QVCGA
2117
CALL
DELISTED
QVC Group Inc Series A
QVCGA
| $1.85M | ﹤0.01% |
4,876
+4,340
| +810% | +$1.96M |
|
2118
CALL
ScottsMiracle-Gro
SMG
$4.03B
| $1.85M | ﹤0.01% |
11,500
-8,400
| -42% | -$1.3M |
|
2119
PUT
Louisiana-Pacific
LPX
$5.2B
| $1.85M | ﹤0.01% |
23,600
-125,000
| -84% | -$8.57M |
|
2120
PUT
BlueLinx
BXC
$455M
| $1.85M | ﹤0.01% |
19,300
-43,100
| -69% | -$2.92M |
|
2121
Perrigo
PRGO
$1.4B
| $1.85M | ﹤0.01% |
47,518
+40,811
| +608% | +$1.71M |
|
2122
PUT
Clean Energy Fuels
CLNE
$447M
| $1.85M | ﹤0.01% |
301,400
-392,200
| -57% | -$3.08M |
|
2123
CALL
Fidelity National Financial
FNF
$13.9B
| $1.85M | ﹤0.01% |
36,816
+31,408
| +581% | +$1.5M |
|
2124
WIX.com
WIX
$2.15B
| $1.85M | ﹤0.01% |
11,711
+11,510
| +5,726% | +$2M |
|
2125
PUT
CryoPort
CYRX
$775M
| $1.85M | ﹤0.01% |
31,200
+21,600
| +225% | +$1.49M |
|
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.