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 | |
|---|---|---|---|---|---|---|
1951
CALL
Eastman Chemical
EMN
$7.8B
| $2.65M | ﹤0.01% |
27,100
-4,700
| -15% | -$466K |
|
1952
PUT
Yum China
YUMC
$14.9B
| $2.65M | ﹤0.01% |
86,000
-40,200
| -32% | -$1.47M |
|
1953
PUT
KE Holdings
BEKE
$16.8B
| $2.65M | ﹤0.01% |
187,400
-452,700
| -71% | -$7.09M |
|
1954
Blackrock
BLK
$164B
| $2.65M | ﹤0.01% |
+3,366
| New | +$2.63M |
|
1955
CALL
2x Long VIX Futures ETF
UVIX
$286M
| $2.65M | ﹤0.01% |
1,702
-471
| -22% | -$725K |
|
1956
CALL
Western Midstream Partners
WES
$19.6B
| $2.65M | ﹤0.01% |
66,600
+17,000
| +34% | +$626K |
|
1957
PUT
Fastly Inc
FSLY
$3.17B
| $2.64M | ﹤0.01% |
358,500
-113,400
| -24% | -$1.11M |
|
1958
PUT
Ares Capital
ARCC
$13.5B
| $2.64M | ﹤0.01% |
126,700
+71,300
| +129% | +$1.49M |
|
1959
CALL
Qiagen
QGEN
$8.53B
| $2.64M | ﹤0.01% |
62,417
+34,514
| +124% | +$1.51M |
|
1960
TG Therapeutics
TGTX
$8.58B
| $2.63M | ﹤0.01% |
148,108
-41,741
| -22% | -$666K |
|
1961
CALL
FS KKR Capital
FSK
$2.98B
| $2.63M | ﹤0.01% |
133,500
+95,500
| +251% | +$1.88M |
|
1962
PUT
Gen Digital
GEN
$15.6B
| $2.63M | ﹤0.01% |
105,100
-60,700
| -37% | -$1.39M |
|
1963
PUT
Grab
GRAB
$13.5B
| $2.62M | ﹤0.01% |
739,300
+152,000
| +26% | +$534K |
|
1964
CALL
Structure Therapeutics
GPCR
$3.49B
| $2.62M | ﹤0.01% |
66,700
+1,700
| +3% | +$69.8K |
|
1965
CALL
RUM Group Inc
RUM
$1.57B
| $2.62M | ﹤0.01% |
471,800
+44,900
| +11% | +$289K |
|
1966
CALL
Rocket Lab Corp
RKLB
$39.9B
| $2.61M | ﹤0.01% |
543,400
-160,900
| -23% | -$671K |
|
1967
CALL
Vermilion Energy
VET
$1.73B
| $2.6M | ﹤0.01% |
236,000
-88,400
| -27% | -$1.05M |
|
1968
CALL
Fortive
FTV
$19B
| $2.59M | ﹤0.01% |
46,445
-6,900
| -13% | -$401K |
|
1969
PUT
Annexon
ANNX
$855M
| $2.59M | ﹤0.01% |
528,600
+480,600
| +1,001% | +$2.49M |
|
1970
Cenovus Energy
CVE
$54.6B
| $2.58M | ﹤0.01% |
+131,489
| New | +$2.66M |
|
1971
Ciena
CIEN
$55.3B
| $2.58M | ﹤0.01% |
53,635
+33,975
| +173% | +$1.61M |
|
1972
PUT
Paychex
PAYX
$40.4B
| $2.58M | ﹤0.01% |
21,800
+600
| +3% | +$73.3K |
|
1973
CALL
Joby Aviation
JOBY
$6.82B
| $2.58M | ﹤0.01% |
505,600
+114,100
| +29% | +$568K |
|
1974
Direxion Daily S&P Biotech Bull 3X ETF
LABU
$571M
| $2.57M | ﹤0.01% |
+22,686
| New | +$2.43M |
|
1975
CALL
WD-40
WDFC
$3.1B
| $2.57M | ﹤0.01% |
11,700
+2,400
| +26% | +$555K |
|
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.