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 | |
|---|---|---|---|---|---|---|
4076
CALL
Daktronics
DAKT
$953M
| $343K | ﹤0.01% |
24,600
+16,800
| +215% | +$179K |
|
4077
CALL
Power Integrations
POWI
$3.3B
| $343K | ﹤0.01% |
4,900
+3,100
| +172% | +$223K |
|
4078
PUT
Spectrum Brands
SPB
$2.08B
| $343K | ﹤0.01% |
4,000
-3,500
| -47% | -$304K |
|
4079
American Electric Power
AEP
$72.4B
| $342K | ﹤0.01% |
3,898
-17,001
| -81% | -$1.49M |
|
4080
PUT
Globus Medical
GMED
$10.9B
| $342K | ﹤0.01% |
5,000
+1,700
| +52% | +$102K |
|
|
MAPS
4081
CALL
DELISTED
WM TECHNOLOGY INC A
MAPS
| $342K | ﹤0.01% |
329,500
+217,900
| +195% | +$239K |
|
4082
CALL
Mirion Technologies
MIR
$4.11B
| $342K | ﹤0.01% |
31,900
-45,600
| -59% | -$485K |
|
4083
Fidelity National Financial
FNF
$14.6B
| $341K | ﹤0.01% |
+6,906
| New | +$348K |
|
4084
Markel Group
MKL
$25.5B
| $341K | ﹤0.01% |
+217
| New | +$337K |
|
|
AAMI
4085
CALL
Acadian Asset Management
AAMI
$2.94B
| $341K | ﹤0.01% |
15,400
-9,400
| -38% | -$212K |
|
4086
Granite Construction
GVA
$5.31B
| $339K | ﹤0.01% |
5,480
-119
| -2% | -$7.05K |
|
|
SAFE
4087
CALL
Safehold
SAFE
$1.19B
| $339K | ﹤0.01% |
17,600
+12,100
| +220% | +$233K |
|
4088
Zevra Therapeutics
ZVRA
$575M
| $339K | ﹤0.01% |
69,197
+33,731
| +95% | +$160K |
|
4089
CALL
Acuity Brands
AYI
$10.3B
| $338K | ﹤0.01% |
1,400
-600
| -30% | -$153K |
|
4090
CALL
Banco Macro
BMA
$5.81B
| $338K | ﹤0.01% |
5,900
-10,900
| -65% | -$625K |
|
|
JAMF
4091
CALL
DELISTED
Jamf
JAMF
| $338K | ﹤0.01% |
20,500
-4,600
| -18% | -$80.5K |
|
4092
CALL
Aldeyra Therapeutics
ALDX
$95.3M
| $337K | ﹤0.01% |
102,000
-5,200
| -5% | -$20.4K |
|
4093
ProShares UltraShort QQQ
QID
$293M
| $337K | ﹤0.01% |
8,818
+3,968
| +82% | +$175K |
|
4094
TAL Education Group
TAL
$5.79B
| $337K | ﹤0.01% |
31,633
-28,067
| -47% | -$332K |
|
|
OKLO
4095
Oklo
OKLO
$6.89B
| $337K | ﹤0.01% |
39,892
+17,595
| +79% | +$198K |
|
4096
CALL
Akebia Therapeutics
AKBA
$341M
| $336K | ﹤0.01% |
329,800
+5,500
| +2% | +$6.8K |
|
4097
Casey's General Stores
CASY
$31.7B
| $336K | ﹤0.01% |
881
-3,492
| -80% | -$1.17M |
|
4098
National Fuel Gas
NFG
$7.73B
| $336K | ﹤0.01% |
6,202
-6,654
| -52% | -$365K |
|
|
SCS
4099
PUT
DELISTED
Steelcase
SCS
| $336K | ﹤0.01% |
26,000
+5,300
| +26% | +$67.5K |
|
4100
Sensata Technologies
ST
$6.8B
| $336K | ﹤0.01% |
8,996
-58,017
| -87% | -$2.23M |
|
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.