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 |
Apple
AAPL
|
+$552M |
| 2 |
Strategy Inc
MSTR
|
+$85.8M |
| 3 |
MSTX
Defiance Daily Target 2x Long MSTR ETF
MSTX
|
+$48.1M |
| 4 |
Intel
INTC
|
+$45.4M |
| 5 |
Uber
UBER
|
+$43M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$133M |
| 2 |
Pinduoduo
PDD
|
+$82.6M |
| 3 |
Boeing
BA
|
+$49.8M |
| 4 |
KraneShares CSI China Internet ETF
KWEB
|
+$45.1M |
| 5 |
Microsoft
MSFT
|
+$41M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.68% |
| 2 | Consumer Discretionary | 0.23% |
| 3 | Healthcare | 0.19% |
| 4 | Financials | 0.13% |
| 5 | Communication Services | 0.11% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
SKE
5126
PUT
Skeena Resources
SKE
$3.26B
| $105K | ﹤0.01% |
12,100
| – | – |
|
5127
TriplePoint Venture Growth BDC
TPVG
$186M
| $105K | ﹤0.01% |
14,346
-5,504
| -28% | -$40.5K |
|
5128
PUT
W.R. Berkley
WRB
$27B
| $105K | ﹤0.01% |
2,100
-3,750
| -64% | -$225K |
|
5129
GraniteShares 2x Long AMD Daily ETF
AMDL
$1B
| $105K | ﹤0.01% |
13,749
+12,765
| +1,297% | +$146K |
|
5130
CALL
Viant Technology
DSP
$237M
| $104K | ﹤0.01% |
5,500
-1,800
| -25% | -$28.1K |
|
5131
Health Catalyst
HCAT
$155M
| $104K | ﹤0.01% |
14,767
-6,170
| -29% | -$49.1K |
|
5132
Global X US Infrastructure Development ETF
PAVE
$13.9B
| $104K | ﹤0.01% |
+2,592
| New | +$111K |
|
5133
QuickLogic
QUIK
$228M
| $104K | ﹤0.01% |
9,242
+7,978
| +631% | +$64.7K |
|
5134
PUT
STAG Industrial
STAG
$7.38B
| $104K | ﹤0.01% |
3,100
+1,100
| +55% | +$40.2K |
|
5135
PUT
Protara Therapeutics
TARA
$220M
| $104K | ﹤0.01% |
+19,800
| New | +$64K |
|
|
TSE
5136
DELISTED
Trinseo
TSE
| $104K | ﹤0.01% |
20,516
+2,995
| +17% | +$14.8K |
|
5137
Voya Financial
VOYA
$9.05B
| $104K | ﹤0.01% |
1,521
-15,256
| -91% | -$1.19M |
|
|
CURB
5138
Curbline Properties
CURB
$3.5B
| $104K | ﹤0.01% |
+4,497
| New | +$106K |
|
5139
First Trust RBA American Industrial Renaissance ETF
AIRR
$10.1B
| $103K | ﹤0.01% |
+1,345
| New | +$107K |
|
5140
CALL
Cadiz
CDZI
$262M
| $103K | ﹤0.01% |
+19,900
| New | +$71.7K |
|
5141
PUT
Douglas Elliman
DOUG
$155M
| $103K | ﹤0.01% |
+61,700
| New | +$119K |
|
5142
PUT
MidCap Financial Investment
MFIC
$792M
| $103K | ﹤0.01% |
7,700
+100
| +1% | +$1.36K |
|
5143
Modine Manufacturing
MOD
$10.6B
| $103K | ﹤0.01% |
+897
| New | +$115K |
|
|
OLO
5144
DELISTED
Olo Inc
OLO
| $103K | ﹤0.01% |
13,511
+13,083
| +3,057% | +$81.7K |
|
5145
Tecnoglass
TGLS
$1.92B
| $103K | ﹤0.01% |
+1,299
| New | +$98.9K |
|
|
TRUE
5146
DELISTED
TrueCar
TRUE
| $103K | ﹤0.01% |
27,839
+27,634
| +13,480% | +$109K |
|
5147
United Microelectronic
UMC
$48.7B
| $103K | ﹤0.01% |
15,871
-36,582
| -70% | -$262K |
|
5148
CALL
Upland Software
UPLD
$12.7M
| $103K | ﹤0.01% |
2,380
+2,290
| +2,544% | +$74.3K |
|
5149
PUT
Loar Holdings
LOAR
$6.41B
| $103K | ﹤0.01% |
+1,400
| New | +$115K |
|
|
AGEN
5150
PUT
Agenus
AGEN
$325M
| $102K | ﹤0.01% |
37,800
+1,600
| +4% | +$5.92K |
|
Similar funds
Simplex Trading's Q4 2024 Portfolio in Review
As of Q4 2024, Simplex Trading held 10,008 positions worth $179B, up 4.8% from $170B the previous quarter. Its ten largest holdings account for 49% of the portfolio.
Simplex Trading's Q4 2024 filing shows 1,520 new, 3,222 increased, 3,616 reduced and 1,504 closed positions. Its largest new stake was Strategy Inc: 285,022 shares worth $82.5M. The largest sale was NVIDIA, an estimated $133M.
By sector, the portfolio is most concentrated in Technology at 0.68% of assets, up from 0.4% a quarter earlier, followed by Consumer Discretionary and Healthcare.
- Simplex Trading's largest Q4 2024 buy was Strategy Inc: 285,022 shares worth $82.5M.
- Simplex Trading added most to Apple in Q4 2024, an estimated $552M increase.
- Simplex Trading's biggest Q4 2024 reduction was NVIDIA, cutting an estimated $133M.
- Simplex Trading fully exited Pinduoduo in Q4 2024, selling an estimated $82.6M.
- Simplex Trading's ten largest holdings make up 49% of its $179B portfolio in Q4 2024.
- Simplex Trading opened 1,520 new positions and closed 1,504 in Q4 2024.
- Simplex Trading's portfolio value rose 4.8% quarter-over-quarter to $179B.
Based on Simplex Trading's 13F filing for Q4 2024, filed 11 Feb 2025.