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 | |
|---|---|---|---|---|---|---|
5126
CALL
Digimarc Corp
DMRC
$149M
| $110K | ﹤0.01% |
4,100
+1,100
| +37% | +$32.4K |
|
5127
Element Solutions
ESI
$8.98B
| $110K | ﹤0.01% |
4,070
-10,738
| -73% | -$281K |
|
5128
CALL
OneSpan
OSPN
$572M
| $110K | ﹤0.01% |
6,600
-94,300
| -93% | -$1.4M |
|
5129
Ring Energy
REI
$317M
| $110K | ﹤0.01% |
69,035
+26,984
| +64% | +$48.3K |
|
|
CMRC
5130
Commerce.com Inc Series 1
CMRC
$257M
| $109K | ﹤0.01% |
+18,711
| New | +$123K |
|
|
CMPS
5131
CALL
Compass Pathways
CMPS
$1.54B
| $109K | ﹤0.01% |
17,400
+9,200
| +112% | +$64.9K |
|
|
DESP
5132
PUT
DELISTED
Despegar.com
DESP
| $109K | ﹤0.01% |
8,800
-4,600
| -34% | -$55.3K |
|
5133
GoPro
GPRO
$129M
| $109K | ﹤0.01% |
80,375
+30,618
| +62% | +$42.2K |
|
5134
Nuvation Bio
NUVB
$2.2B
| $109K | ﹤0.01% |
47,697
+40,641
| +576% | +$124K |
|
5135
Invesco Aerospace & Defense ETF
PPA
$8.27B
| $109K | ﹤0.01% |
952
+252
| +36% | +$27.4K |
|
5136
PUT
Runway Growth Finance
RWAY
$231M
| $109K | ﹤0.01% |
10,600
+7,500
| +242% | +$82.3K |
|
5137
CALL
Surgery Partners
SGRY
$2.02B
| $109K | ﹤0.01% |
3,400
+3,000
| +750% | +$88.6K |
|
5138
CALL
Vuzix
VUZI
$194M
| $109K | ﹤0.01% |
93,700
+21,300
| +29% | +$23.2K |
|
|
LAR
5139
PUT
Lithium Argentina AG
LAR
$985M
| $109K | ﹤0.01% |
33,500
+32,100
| +2,293% | +$89.1K |
|
|
ACLX
5140
CALL
DELISTED
Arcellx
ACLX
| $108K | ﹤0.01% |
+1,300
| New | +$86.6K |
|
5141
Direxion Daily Aerospace & Defense Bull 3X ETF
DFEN
$388M
| $108K | ﹤0.01% |
+3,035
| New | +$92.9K |
|
5142
PUT
Vaalco Energy
EGY
$571M
| $108K | ﹤0.01% |
18,900
-3,300
| -15% | -$20.8K |
|
5143
PUT
Kilroy Realty
KRC
$4.52B
| $108K | ﹤0.01% |
2,800
-11,900
| -81% | -$421K |
|
5144
LifeVantage
LFVN
$81.4M
| $108K | ﹤0.01% |
+8,964
| New | +$74.2K |
|
5145
CALL
MidCap Financial Investment
MFIC
$785M
| $108K | ﹤0.01% |
8,100
+3,600
| +80% | +$50.8K |
|
5146
CALL
Medallion Financial
MFIN
$228M
| $108K | ﹤0.01% |
13,300
+300
| +2% | +$2.38K |
|
5147
PUT
NetSol Technologies
NTWK
$51.2M
| $108K | ﹤0.01% |
37,900
+23,000
| +154% | +$63.1K |
|
5148
PUT
Grupo Aeroportuario Centro Norte
OMAB
$5.17B
| $108K | ﹤0.01% |
1,600
-100
| -6% | -$6.75K |
|
5149
PUT
Pliant Therapeutics
PLRX
$64.4M
| $108K | ﹤0.01% |
9,700
+6,700
| +223% | +$83.8K |
|
5150
PVH
PVH
$4B
| $108K | ﹤0.01% |
+1,077
| New | +$107K |
|
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.