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 | |
|---|---|---|---|---|---|---|
|
HZNP
1001
PUT
DELISTED
Horizon Therapeutics Public Limited Company Ordinary Shares
HZNP
| $6.96M | 0.01% |
64,600
+1,500
| +2% | +$164K |
|
1002
PUT
West Pharmaceutical
WST
$25B
| $6.94M | 0.01% |
14,800
+10,700
| +261% | +$4.61M |
|
1003
CALL
First Majestic Silver
AG
$8.12B
| $6.94M | 0.01% |
624,600
+55,000
| +10% | +$664K |
|
1004
CALL
SolarEdge
SEDG
$2.75B
| $6.93M | 0.01% |
24,700
-5,400
| -18% | -$1.7M |
|
1005
CALL
Kinder Morgan
KMI
$72.9B
| $6.93M | 0.01% |
436,900
+36,200
| +9% | +$602K |
|
1006
CALL
Li Auto
LI
$12.9B
| $6.93M | 0.01% |
215,800
-238,700
| -53% | -$7.36M |
|
|
SPR
1007
CALL
DELISTED
Spirit AeroSystems
SPR
| $6.92M | 0.01% |
160,600
+26,600
| +20% | +$1.14M |
|
1008
PUT
Southern Company
SO
$109B
| $6.91M | 0.01% |
100,800
+14,800
| +17% | +$944K |
|
1009
CALL
Toyota
TM
$209B
| $6.91M | 0.01% |
37,300
-27,400
| -42% | -$4.93M |
|
1010
CALL
Bunge Global
BG
$23.7B
| $6.9M | 0.01% |
73,900
+15,100
| +26% | +$1.35M |
|
1011
CALL
Ollie's Bargain Outlet
OLLI
$3.94B
| $6.88M | 0.01% |
134,400
+99,100
| +281% | +$6.04M |
|
1012
CALL
United Rentals
URI
$70.9B
| $6.88M | 0.01% |
20,700
-6,500
| -24% | -$2.32M |
|
1013
PUT
C3.ai
AI
$1.27B
| $6.87M | 0.01% |
219,700
+60,000
| +38% | +$2.43M |
|
1014
CALL
Tencent Music
TME
$14.3B
| $6.86M | 0.01% |
1,001,800
+422,500
| +73% | +$3.11M |
|
1015
PUT
ChargePoint
CHPT
$140M
| $6.86M | 0.01% |
17,995
+10,100
| +128% | +$4.48M |
|
1016
PUT
Waters Corp
WAT
$37.5B
| $6.86M | 0.01% |
18,400
+16,100
| +700% | +$5.63M |
|
1017
PUT
Pan American Silver
PAAS
$18.6B
| $6.85M | 0.01% |
274,500
+111,000
| +68% | +$2.8M |
|
1018
CALL
Franco-Nevada
FNV
$41.3B
| $6.84M | 0.01% |
49,500
-16,300
| -25% | -$2.25M |
|
1019
PUT
ResMed
RMD
$27.8B
| $6.75M | 0.01% |
25,900
+14,600
| +129% | +$3.79M |
|
1020
CALL
Boston Scientific
BSX
$64.8B
| $6.75M | 0.01% |
158,800
+69,100
| +77% | +$2.9M |
|
1021
PUT
Bank of Montreal
BMO
$124B
| $6.74M | 0.01% |
62,600
+39,100
| +166% | +$4.21M |
|
1022
PUT
Whirlpool
WHR
$2.31B
| $6.73M | 0.01% |
28,700
+23,800
| +486% | +$5.23M |
|
1023
Apple
AAPL
$4.72T
| $6.73M | 0.01% |
37,900
+13,200
| +53% | +$2.09M |
|
1024
PUT
United Parks & Resorts
PRKS
$2.08B
| $6.69M | 0.01% |
103,200
+39,500
| +62% | +$2.48M |
|
1025
Beyond Meat
BYND
$289M
| $6.68M | 0.01% |
102,457
+24,486
| +31% | +$2.08M |
|
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.