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 |
NVIDIA
NVDA
|
+$93M |
| 2 |
Citigroup
C
|
+$74.8M |
| 3 |
Pinduoduo
PDD
|
+$50.7M |
| 4 |
Intel
INTC
|
+$47.1M |
| 5 |
Broadcom
AVGO
|
+$46.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$94.5M |
| 2 |
Pfizer
PFE
|
+$66.4M |
| 3 |
Boeing
BA
|
+$61.6M |
| 4 |
PayPal
PYPL
|
+$42.2M |
| 5 |
GE Aerospace
GE
|
+$42M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.53% |
| 2 | Consumer Discretionary | 0.29% |
| 3 | Healthcare | 0.21% |
| 4 | Financials | 0.2% |
| 5 | Materials | 0.12% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
3026
Burford Capital
BUR
$920M
| $903K | ﹤0.01% |
+69,202
| New | +$1.02M |
|
3027
LivaNova
LIVN
$4.4B
| $902K | ﹤0.01% |
16,465
-1,403
| -8% | -$80K |
|
3028
PUT
Applied Optoelectronics
AAOI
$7.85B
| $901K | ﹤0.01% |
108,800
+28,400
| +35% | +$312K |
|
|
INFA
3029
PUT
DELISTED
Informatica
INFA
| $898K | ﹤0.01% |
29,100
+25,600
| +731% | +$806K |
|
3030
CALL
Avery Dennison
AVY
$12.5B
| $896K | ﹤0.01% |
4,100
+3,800
| +1,267% | +$844K |
|
3031
CALL
The Greenbrier Companies
GBX
$1.55B
| $896K | ﹤0.01% |
18,100
+5,900
| +48% | +$306K |
|
|
SOND
3032
CALL
DELISTED
Sonder
SOND
| $896K | ﹤0.01% |
193,700
-200
| -0.1% | -$782 |
|
3033
PUT
ODDITY Tech
ODD
$753M
| $895K | ﹤0.01% |
22,800
-28,300
| -55% | -$1.05M |
|
3034
PUT
Genpact
G
$5.48B
| $894K | ﹤0.01% |
27,800
+22,300
| +405% | +$719K |
|
3035
Summit Therapeutics
SMMT
$10.6B
| $894K | ﹤0.01% |
+114,647
| New | +$619K |
|
|
NVMI
3036
Nova
NVMI
$13.6B
| $893K | ﹤0.01% |
3,811
+2,488
| +188% | +$493K |
|
3037
CALL
Veeco
VECO
$2.97B
| $892K | ﹤0.01% |
19,100
+9,900
| +108% | +$391K |
|
3038
CALL
Grocery Outlet
GO
$933M
| $891K | ﹤0.01% |
40,300
+6,100
| +18% | +$145K |
|
3039
Dave & Buster's
PLAY
$358M
| $891K | ﹤0.01% |
22,387
-26,995
| -55% | -$1.4M |
|
3040
PUT
Agios Pharmaceuticals
AGIO
$2.23B
| $888K | ﹤0.01% |
20,600
+18,200
| +758% | +$657K |
|
3041
PUT
Bio-Techne
TECH
$11.2B
| $888K | ﹤0.01% |
12,400
-9,900
| -44% | -$729K |
|
3042
PUT
Caleres
CAL
$417M
| $887K | ﹤0.01% |
26,400
+14,800
| +128% | +$532K |
|
3043
iShares 1-3 Year Treasury Bond ETF
SHY
$25.4B
| $887K | ﹤0.01% |
10,864
+8,235
| +313% | +$670K |
|
3044
CALL
EVgo
EVGO
$221M
| $886K | ﹤0.01% |
361,700
+101,300
| +39% | +$208K |
|
3045
CALL
CarGurus
CARG
$3.16B
| $885K | ﹤0.01% |
33,800
+4,900
| +17% | +$117K |
|
3046
Repligen
RGEN
$7.39B
| $885K | ﹤0.01% |
+7,021
| New | +$1.1M |
|
3047
PUT
Joby Aviation
JOBY
$7.25B
| $884K | ﹤0.01% |
173,400
-8,700
| -5% | -$43.3K |
|
|
FFWM
3048
PUT
DELISTED
First Foundation Inc
FFWM
| $882K | ﹤0.01% |
134,700
-4,300
| -3% | -$26.3K |
|
3049
Cellebrite
CLBT
$3.67B
| $880K | ﹤0.01% |
73,687
+57,810
| +364% | +$646K |
|
3050
CALL
Masco
MAS
$16.3B
| $880K | ﹤0.01% |
13,200
+300
| +2% | +$21.1K |
|
Similar funds
Simplex Trading's Q2 2024 Portfolio in Review
As of Q2 2024, Simplex Trading held 10,213 positions worth $162B, down 6.5% from $173B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading withdrew a net $19.2B in Q2 2024, closing 1,431 positions and reducing 4,061 holdings. Its most notable exit was Boeing, an estimated $61.6M position sold in full.
By sector, the portfolio is most concentrated in Technology at 0.53% of assets, up from 0.38% a quarter earlier, followed by Consumer Discretionary and Healthcare.
Against the trend, Simplex Trading opened a new position in Citigroup worth $77M.
- Simplex Trading's largest Q2 2024 buy was Citigroup: 1,213,247 shares worth $77M.
- Simplex Trading added most to NVIDIA in Q2 2024, an estimated $93M increase.
- Simplex Trading's biggest Q2 2024 reduction was State Street Energy Select Sector SPDR ETF, cutting an estimated $94.5M.
- Simplex Trading fully exited Boeing in Q2 2024, selling an estimated $61.6M.
- Simplex Trading's ten largest holdings make up 50% of its $162B portfolio in Q2 2024.
- Simplex Trading opened 1,358 new positions and closed 1,431 in Q2 2024.
- Simplex Trading's portfolio value fell 6.5% quarter-over-quarter to $162B.
Based on Simplex Trading's 13F filing for Q2 2024, filed 25 Jul 2024.