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 | |
|---|---|---|---|---|---|---|
3001
CALL
Banc of California
BANC
$3.28B
| $858K | ﹤0.01% |
55,500
-69,700
| -56% | -$1.1M |
|
3002
CALL
Leggett & Platt
LEG
$1.52B
| $858K | ﹤0.01% |
89,400
-15,000
| -14% | -$180K |
|
3003
Lincoln National
LNC
$7.91B
| $858K | ﹤0.01% |
+27,076
| New | +$902K |
|
3004
Vir Biotechnology
VIR
$1.47B
| $856K | ﹤0.01% |
116,627
+112,354
| +2,629% | +$886K |
|
3005
Kohl's
KSS
$2.03B
| $855K | ﹤0.01% |
60,963
-63,590
| -51% | -$1.1M |
|
3006
NETGEAR
NTGR
$669M
| $854K | ﹤0.01% |
+30,677
| New | +$721K |
|
3007
PUT
Viper Energy
VNOM
$8.81B
| $853K | ﹤0.01% |
17,400
-1,400
| -7% | -$72.1K |
|
3008
Denison Mines
DNN
$2.63B
| $852K | ﹤0.01% |
473,527
-125,745
| -21% | -$265K |
|
3009
PUT
Lightspeed Commerce
LSPD
$1.3B
| $852K | ﹤0.01% |
56,000
-6,800
| -11% | -$112K |
|
|
AMED
3010
DELISTED
Amedisys
AMED
| $848K | ﹤0.01% |
9,350
-1,195
| -11% | -$110K |
|
|
SHOE
3011
Shoe Station Group
SHOE
$395M
| $846K | ﹤0.01% |
25,592
+25,584
| +319,800% | +$926K |
|
3012
CALL
NewAmsterdam Pharma
NAMS
$3.47B
| $845K | ﹤0.01% |
32,900
+32,700
| +16,350% | +$695K |
|
3013
PUT
GigaCloud Technology
GCT
$1.35B
| $844K | ﹤0.01% |
45,600
-22,600
| -33% | -$523K |
|
3014
CALL
Molina Healthcare
MOH
$10.3B
| $844K | ﹤0.01% |
2,900
-4,300
| -60% | -$1.33M |
|
3015
Byrna Technologies
BYRN
$80.3M
| $843K | ﹤0.01% |
29,266
+14,374
| +97% | +$282K |
|
3016
Genesis Energy
GEL
$1.84B
| $843K | ﹤0.01% |
83,403
+56,814
| +214% | +$671K |
|
3017
CALL
Vaxcyte
PCVX
$7.89B
| $843K | ﹤0.01% |
10,300
+7,200
| +232% | +$715K |
|
3018
PUT
Universal Health Services
UHS
$9.43B
| $843K | ﹤0.01% |
4,700
-7,900
| -63% | -$1.61M |
|
3019
PUT
Revolve Group
RVLV
$1.79B
| $840K | ﹤0.01% |
25,100
-900
| -3% | -$27.9K |
|
3020
CALL
RPM International
RPM
$13.7B
| $836K | ﹤0.01% |
6,800
+5,800
| +580% | +$765K |
|
3021
CALL
SM Energy
SM
$7.96B
| $833K | ﹤0.01% |
21,500
-45,500
| -68% | -$1.92M |
|
3022
Centrus Energy
LEU
$3.22B
| $832K | ﹤0.01% |
12,503
+4,142
| +50% | +$323K |
|
3023
CALL
Bentley Systems
BSY
$9.54B
| $831K | ﹤0.01% |
17,800
+4,300
| +32% | +$210K |
|
3024
Conagra Brands
CAG
$7.07B
| $830K | ﹤0.01% |
29,925
+16,413
| +121% | +$466K |
|
3025
Evolent Health
EVH
$475M
| $828K | ﹤0.01% |
+73,680
| New | +$1.29M |
|
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.