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 | |
|---|---|---|---|---|---|---|
3076
CALL
UGI
UGI
$7.91B
| $858K | ﹤0.01% |
18,700
-23,400
| -56% | -$1.04M |
|
3077
Acacia Research
ACTG
$447M
| $855K | ﹤0.01% |
166,752
+120,244
| +259% | +$649K |
|
|
MAPS
3078
PUT
DELISTED
WM TECHNOLOGY INC A
MAPS
| $855K | ﹤0.01% |
143,000
+90,200
| +171% | +$884K |
|
3079
CALL
Ares Capital
ARCC
$13.6B
| $853K | ﹤0.01% |
40,300
-39,400
| -49% | -$818K |
|
3080
PUT
Solid Power
SLDP
$481M
| $853K | ﹤0.01% |
+97,700
| New | +$964K |
|
|
LGF.B
3081
CALL
DELISTED
Lions Gate Entertainment Corp. Class B Non-Voting Shares
LGF.B
| $853K | ﹤0.01% |
51,400
+23,600
| +85% | +$331K |
|
3082
PUT
Lindblad Expeditions
LIND
$1.84B
| $851K | ﹤0.01% |
54,600
-31,000
| -36% | -$489K |
|
|
BLCN
3083
PUT
DELISTED
Siren ETF Trust Siren NexGen Economy ETF
BLCN
| $850K | ﹤0.01% |
20,000
+18,700
| +1,438% | +$877K |
|
3084
CALL
10x Genomics
TXG
$5.83B
| $849K | ﹤0.01% |
5,700
-12,000
| -68% | -$1.84M |
|
3085
PUT
FIGS
FIGS
$1.66B
| $848K | ﹤0.01% |
30,800
-1,600
| -5% | -$52.7K |
|
3086
CALL
Silicon Laboratories
SLAB
$7.17B
| $846K | ﹤0.01% |
4,100
+3,000
| +273% | +$552K |
|
3087
CALL
Winnebago Industries
WGO
$879M
| $846K | ﹤0.01% |
11,300
-45,200
| -80% | -$3.25M |
|
|
BZUN
3088
Baozun
BZUN
$164M
| $845K | ﹤0.01% |
60,851
+34,677
| +132% | +$568K |
|
3089
CALL
Ameriprise Financial
AMP
$47.6B
| $844K | ﹤0.01% |
2,800
+2,500
| +833% | +$739K |
|
|
GRTS
3090
CALL
DELISTED
Gritstone bio, Inc. Common Stock
GRTS
| $841K | ﹤0.01% |
65,400
+39,400
| +152% | +$436K |
|
|
FPAC
3091
PUT
DELISTED
Far Peak Acquisition Corporation
FPAC
| $841K | ﹤0.01% |
83,600
+71,900
| +615% | +$741K |
|
|
YELL
3092
PUT
DELISTED
Yellow Corporation Common Stock
YELL
| $841K | ﹤0.01% |
66,800
-27,100
| -29% | -$296K |
|
3093
Enphase Energy
ENPH
$5.01B
| $840K | ﹤0.01% |
4,593
-2,569
| -36% | -$536K |
|
|
BHVN
3094
CALL
DELISTED
Biohaven Pharmaceutical Holding Company Ltd.
BHVN
| $840K | ﹤0.01% |
6,100
-4,500
| -42% | -$572K |
|
3095
PUT
Adicet Bio
ACET
$75.3M
| $839K | ﹤0.01% |
3,000
+2,987
| +22,977% | +$513K |
|
3096
CEVA Inc
CEVA
$980M
| $839K | ﹤0.01% |
+19,408
| New | +$867K |
|
3097
Eversource Energy
ES
$28.1B
| $839K | ﹤0.01% |
9,226
+7,289
| +376% | +$627K |
|
3098
CALL
Leslie's
LESL
$10.8M
| $839K | ﹤0.01% |
1,775
+795
| +81% | +$343K |
|
|
MITT
3099
CALL
TPG Mortgage Investment Trust
MITT
$233M
| $839K | ﹤0.01% |
81,900
-64,000
| -44% | -$726K |
|
|
EBIX
3100
PUT
DELISTED
Ebix Inc
EBIX
| $839K | ﹤0.01% |
27,600
+6,100
| +28% | +$195K |
|
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.