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 |
Boeing
BA
|
+$55.8M |
| 2 |
Microsoft
MSFT
|
+$42.2M |
| 3 |
Pinduoduo
PDD
|
+$41.3M |
| 4 |
Apple
AAPL
|
+$32M |
| 5 |
Direxion Daily Semiconductor Bull 3X ETF
SOXL
|
+$28.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Broadcom
AVGO
|
+$95.2M |
| 2 |
Citigroup
C
|
+$57.2M |
| 3 |
Pfizer
PFE
|
+$56.4M |
| 4 |
TSMC
TSM
|
+$39.7M |
| 5 |
Starbucks
SBUX
|
+$35.5M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.4% |
| 2 | Consumer Discretionary | 0.29% |
| 3 | Healthcare | 0.15% |
| 4 | Industrials | 0.13% |
| 5 | Financials | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
3951
CALL
B2Gold
BTG
$5.12B
| $357K | ﹤0.01% |
116,000
+30,100
| +35% | +$87.4K |
|
|
CNH
3952
CALL
CNH Industrial
CNH
$14.2B
| $357K | ﹤0.01% |
32,200
-48,100
| -60% | -$490K |
|
|
ATSG
3953
PUT
DELISTED
Air Transport Services Group
ATSG
| $356K | ﹤0.01% |
22,000
+2,600
| +13% | +$39.7K |
|
|
DM
3954
CALL
DELISTED
Desktop Metal, Inc.
DM
| $356K | ﹤0.01% |
76,400
-3,300
| -4% | -$15.1K |
|
3955
Genesis Energy
GEL
$1.81B
| $355K | ﹤0.01% |
+26,589
| New | +$362K |
|
3956
CALL
LivePerson
LPSN
$22.9M
| $355K | ﹤0.01% |
18,493
+14,526
| +366% | +$246K |
|
3957
RCI Hospitality Holdings
RICK
$203M
| $355K | ﹤0.01% |
7,971
+3,995
| +100% | +$179K |
|
3958
CALL
TTM Technologies
TTMI
$11.3B
| $355K | ﹤0.01% |
19,500
+19,000
| +3,800% | +$367K |
|
3959
PUT
Charles River Laboratories
CRL
$11.6B
| $354K | ﹤0.01% |
1,800
-600
| -25% | -$125K |
|
3960
CALL
Cedar Fair
FUN
$1.91B
| $354K | ﹤0.01% |
+8,800
| New | +$403K |
|
|
HIVE
3961
HIVE Digital Technologies
HIVE
$760M
| $354K | ﹤0.01% |
+113,215
| New | +$369K |
|
3962
CALL
Vaxcyte
PCVX
$7.88B
| $354K | ﹤0.01% |
3,100
-13,700
| -82% | -$1.23M |
|
3963
PUT
Pinnacle West Capital
PNW
$12.8B
| $354K | ﹤0.01% |
4,000
-1,800
| -31% | -$154K |
|
3964
East-West Bancorp
EWBC
$18B
| $353K | ﹤0.01% |
+4,268
| New | +$342K |
|
3965
PUT
Domo
DOMO
$170M
| $352K | ﹤0.01% |
47,000
-484,900
| -91% | -$3.7M |
|
3966
PUT
Everest Group
EG
$15.8B
| $352K | ﹤0.01% |
900
-12,900
| -93% | -$4.91M |
|
3967
PUT
Kulicke & Soffa
KLIC
$4.76B
| $352K | ﹤0.01% |
7,800
+5,600
| +255% | +$248K |
|
3968
PUT
Ocular Therapeutix
OCUL
$1.85B
| $352K | ﹤0.01% |
40,500
-31,300
| -44% | -$258K |
|
3969
CALL
Structure Therapeutics
GPCR
$3.4B
| $351K | ﹤0.01% |
8,000
-58,700
| -88% | -$2.27M |
|
3970
Schwab US Large-Cap Growth ETF
SCHG
$59.1B
| $351K | ﹤0.01% |
+13,480
| New | +$339K |
|
3971
CALL
Arrowhead Research
ARWR
$12.1B
| $350K | ﹤0.01% |
18,100
-5,000
| -22% | -$122K |
|
3972
Ryman Hospitality Properties
RHP
$8.58B
| $350K | ﹤0.01% |
3,268
+2,333
| +250% | +$238K |
|
3973
CALL
Arhaus
ARHS
$1.12B
| $349K | ﹤0.01% |
28,400
-7,900
| -22% | -$107K |
|
3974
Spectrum Brands
SPB
$2.08B
| $349K | ﹤0.01% |
3,671
+3,298
| +884% | +$292K |
|
3975
CALL
Terex
TEX
$7.84B
| $349K | ﹤0.01% |
6,600
-2,200
| -25% | -$122K |
|
Similar funds
Simplex Trading's Q3 2024 Portfolio in Review
As of Q3 2024, Simplex Trading held 9,964 positions worth $170B, up 5.3% from $162B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading's Q3 2024 filing shows 1,185 new, 3,232 increased, 3,829 reduced and 1,476 closed positions. Its largest new stake was Boeing: 325,328 shares worth $49.5M. The largest sale was Broadcom, an estimated $95.2M.
By sector, the portfolio is most concentrated in Technology at 0.4% of assets, down from 0.53% a quarter earlier, followed by Consumer Discretionary and Healthcare.
- Simplex Trading's largest Q3 2024 buy was Boeing: 325,328 shares worth $49.5M.
- Simplex Trading added most to Pinduoduo in Q3 2024, an estimated $41.3M increase.
- Simplex Trading's biggest Q3 2024 reduction was Citigroup, cutting an estimated $57.2M.
- Simplex Trading fully exited Broadcom in Q3 2024, selling an estimated $95.2M.
- Simplex Trading's ten largest holdings make up 50% of its $170B portfolio in Q3 2024.
- Simplex Trading opened 1,185 new positions and closed 1,476 in Q3 2024.
- Simplex Trading's portfolio value rose 5.3% quarter-over-quarter to $170B.
Based on Simplex Trading's 13F filing for Q3 2024, filed 8 Nov 2024.