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 | |
|---|---|---|---|---|---|---|
|
LSXMK
1851
DELISTED
Liberty Media Corporation Series C Liberty SiriusXM Common Stock
LSXMK
| $2.94M | ﹤0.01% |
+132,663
| New | +$3.16M |
|
1852
Direxion Daily TSLA Bull 2X ETF
TSLL
$2.44B
| $2.94M | ﹤0.01% |
+319,354
| New | +$2.42M |
|
1853
CALL
Huntington Ingalls Industries
HII
$11.3B
| $2.93M | ﹤0.01% |
11,900
-10,600
| -47% | -$2.76M |
|
1854
CALL
BlackLine
BL
$1.69B
| $2.93M | ﹤0.01% |
60,400
+13,200
| +28% | +$725K |
|
1855
CALL
Comfort Systems
FIX
$61B
| $2.92M | ﹤0.01% |
9,600
-19,100
| -67% | -$6.07M |
|
1856
PUT
Tilray
TLRY
$479M
| $2.92M | ﹤0.01% |
175,700
+85,490
| +95% | +$1.64M |
|
1857
CALL
Infosys
INFY
$45B
| $2.91M | ﹤0.01% |
156,500
+75,200
| +92% | +$1.31M |
|
1858
PUT
Fortis
FTS
$30B
| $2.91M | ﹤0.01% |
75,000
+72,000
| +2,400% | +$2.84M |
|
1859
CALL
Concentrix
CNXC
$1.36B
| $2.91M | ﹤0.01% |
46,000
-51,800
| -53% | -$3.11M |
|
1860
CALL
Axos Financial
AX
$5.45B
| $2.91M | ﹤0.01% |
50,900
+6,100
| +14% | +$332K |
|
1861
PUT
MarketAxess Holdings
MKTX
$4.15B
| $2.91M | ﹤0.01% |
14,500
+4,600
| +46% | +$949K |
|
|
CTLT
1862
PUT
DELISTED
CATALENT, INC.
CTLT
| $2.91M | ﹤0.01% |
51,700
-16,300
| -24% | -$909K |
|
1863
Under Armour
UAA
$3B
| $2.91M | ﹤0.01% |
435,789
+27,135
| +7% | +$185K |
|
1864
PUT
Cincinnati Financial
CINF
$28.3B
| $2.9M | ﹤0.01% |
24,600
-13,600
| -36% | -$1.59M |
|
1865
CALL
BorgWarner
BWA
$13.2B
| $2.9M | ﹤0.01% |
90,000
-126,200
| -58% | -$4.37M |
|
1866
PUT
Safe Bulkers
SB
$781M
| $2.9M | ﹤0.01% |
498,300
+459,900
| +1,198% | +$2.48M |
|
1867
PUT
Invesco CurrencyShares Euro Currency Trust
FXE
$331M
| $2.9M | ﹤0.01% |
29,300
-53,500
| -65% | -$5.32M |
|
1868
iShares Select Dividend ETF
DVY
$24B
| $2.89M | ﹤0.01% |
+23,924
| New | +$2.9M |
|
1869
Direxion Daily Semiconductor Bear 3X ETF
SOXS
$1.74B
| $2.89M | ﹤0.01% |
638
+483
| +312% | +$2.94M |
|
1870
CALL
State Street SPDR S&P MIDCAP 400 ETF Trust
MDY
$27B
| $2.89M | ﹤0.01% |
5,400
-1,200
| -18% | -$645K |
|
1871
CALL
Beyond Meat
BYND
$288M
| $2.88M | ﹤0.01% |
429,800
-70,700
| -14% | -$502K |
|
1872
Linde
LIN
$237B
| $2.88M | ﹤0.01% |
+6,564
| New | +$2.89M |
|
1873
PUT
Rambus
RMBS
$10.4B
| $2.88M | ﹤0.01% |
49,000
-27,000
| -36% | -$1.54M |
|
1874
CALL
Clear Secure
YOU
$5.26B
| $2.88M | ﹤0.01% |
153,900
-16,100
| -9% | -$291K |
|
1875
PUT
Ollie's Bargain Outlet
OLLI
$4.01B
| $2.88M | ﹤0.01% |
29,300
+10,300
| +54% | +$819K |
|
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.