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 | |
|---|---|---|---|---|---|---|
3801
Alphabet (Google) Class A
GOOGL
$4.08T
| $440K | ﹤0.01% |
2,417
-111,838
| -98% | -$18.9M |
|
3802
CALL
Ardmore Shipping
ASC
$669M
| $439K | ﹤0.01% |
19,500
-25,000
| -56% | -$493K |
|
3803
CALL
Kimco Realty
KIM
$17.7B
| $439K | ﹤0.01% |
22,600
+15,600
| +223% | +$292K |
|
3804
CALL
La-Z-Boy
LZB
$1.65B
| $439K | ﹤0.01% |
11,800
+1,700
| +17% | +$60K |
|
3805
PUT
Packaging Corp of America
PKG
$22.6B
| $438K | ﹤0.01% |
2,400
-10,100
| -81% | -$1.84M |
|
3806
PUT
Humacyte
HUMA
$170M
| $437K | ﹤0.01% |
91,200
+46,900
| +106% | +$244K |
|
3807
Tidewater
TDW
$3.71B
| $437K | ﹤0.01% |
+4,596
| New | +$453K |
|
3808
Agilent Technologies
A
$39.7B
| $435K | ﹤0.01% |
3,361
-17,722
| -84% | -$2.48M |
|
3809
Loews
L
$24.6B
| $435K | ﹤0.01% |
5,821
+869
| +18% | +$65.8K |
|
3810
PUT
QuidelOrtho
QDEL
$1.14B
| $435K | ﹤0.01% |
13,100
-9,200
| -41% | -$376K |
|
|
OPTU
3811
Optimum Communications Inc
OPTU
$298M
| $433K | ﹤0.01% |
212,311
+195,620
| +1,172% | +$434K |
|
3812
PUT
CarGurus
CARG
$3.28B
| $432K | ﹤0.01% |
16,500
+14,000
| +560% | +$333K |
|
3813
Restaurant Brands International
QSR
$26B
| $432K | ﹤0.01% |
+6,148
| New | +$439K |
|
3814
CALL
IES Holdings
IESC
$10.8B
| $431K | ﹤0.01% |
3,100
+1,600
| +107% | +$225K |
|
3815
PUT
Blue Bird Corp
BLBD
$2.34B
| $430K | ﹤0.01% |
8,000
+7,800
| +3,900% | +$359K |
|
3816
PUT
Clover Health Investments
CLOV
$2.28B
| $430K | ﹤0.01% |
350,400
+170,600
| +95% | +$153K |
|
|
GLDD
3817
CALL
DELISTED
Great Lakes Dredge & Dock
GLDD
| $430K | ﹤0.01% |
49,000
-20,300
| -29% | -$173K |
|
3818
PUT
Magnolia Oil & Gas
MGY
$5.55B
| $430K | ﹤0.01% |
17,000
-3,200
| -16% | -$81.6K |
|
|
SII
3819
CALL
Sprott
SII
$2.73B
| $430K | ﹤0.01% |
10,400
+10,000
| +2,500% | +$419K |
|
3820
Gogo Inc
GOGO
$550M
| $429K | ﹤0.01% |
44,600
-7,069
| -14% | -$67K |
|
3821
CALL
United Bankshares
UBSI
$6.71B
| $428K | ﹤0.01% |
13,200
+10,500
| +389% | +$347K |
|
3822
indie Semiconductor
INDI
$678M
| $427K | ﹤0.01% |
69,300
-15,901
| -19% | -$101K |
|
3823
CALL
Sociedad Química y Minera de Chile
SQM
$19.1B
| $427K | ﹤0.01% |
10,500
-27,900
| -73% | -$1.29M |
|
3824
Harmony Gold Mining
HMY
$9.7B
| $426K | ﹤0.01% |
+46,470
| New | +$416K |
|
3825
CALL
Yext
YEXT
$564M
| $425K | ﹤0.01% |
79,500
+57,300
| +258% | +$309K |
|
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.