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 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$272M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$99M |
| 3 |
NVIDIA
NVDA
|
+$89.9M |
| 4 |
TSMC
TSM
|
+$87.7M |
| 5 |
Amazon
AMZN
|
+$61M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$518M |
| 2 |
Strategy Inc
MSTR
|
+$81.2M |
| 3 |
Alibaba
BABA
|
+$66.7M |
| 4 |
Advanced Micro Devices
AMD
|
+$44.3M |
| 5 |
Uber
UBER
|
+$41.3M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.41% |
| 2 | Consumer Discretionary | 0.22% |
| 3 | Healthcare | 0.17% |
| 4 | Communication Services | 0.15% |
| 5 | Financials | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2026
PUT
ATI
ATI
$27B
| $2M | ﹤0.01% |
38,500
+33,000
| +600% | +$1.87M |
|
2027
PUT
Noble Corp
NE
$6.9B
| $2M | ﹤0.01% |
84,500
-142,400
| -63% | -$4.08M |
|
2028
US Global Jets ETF
JETS
$802M
| $2M | ﹤0.01% |
96,265
+93,940
| +4,040% | +$2.3M |
|
2029
CoStar Group
CSGP
$11.3B
| $2M | ﹤0.01% |
+25,214
| New | +$1.92M |
|
2030
CALL
MACOM Technology Solutions
MTSI
$20.4B
| $2M | ﹤0.01% |
19,900
-34,500
| -63% | -$4.2M |
|
2031
PUT
Performance Food Group
PFGC
$17.5B
| $2M | ﹤0.01% |
25,400
+19,200
| +310% | +$1.6M |
|
2032
CALL
Navios Maritime Partners
NMM
$2.25B
| $2M | ﹤0.01% |
50,900
-176,300
| -78% | -$7.44M |
|
2033
CALL
Ventas
VTR
$48.9B
| $1.99M | ﹤0.01% |
29,000
-68,000
| -70% | -$4.34M |
|
2034
CALL
Genesis Energy
GEL
$1.84B
| $1.99M | ﹤0.01% |
126,900
+122,800
| +2,995% | +$1.5M |
|
|
ARR
2035
CALL
Armour Residential REIT
ARR
$2.02B
| $1.99M | ﹤0.01% |
116,300
+28,300
| +32% | +$528K |
|
2036
Macy's
M
$6.15B
| $1.99M | ﹤0.01% |
158,286
-130,809
| -45% | -$1.9M |
|
2037
CALL
Red Cat Holdings
RCAT
$1.16B
| $1.99M | ﹤0.01% |
337,800
+9,600
| +3% | +$76.9K |
|
2038
Philip Morris
PM
$301B
| $1.99M | ﹤0.01% |
+12,508
| New | +$1.77M |
|
2039
CALL
Packaging Corp of America
PKG
$22.7B
| $1.98M | ﹤0.01% |
10,000
+2,900
| +41% | +$619K |
|
2040
CALL
KBR
KBR
$4.68B
| $1.97M | ﹤0.01% |
39,600
+24,300
| +159% | +$1.3M |
|
2041
Vale
VALE
$62.9B
| $1.97M | ﹤0.01% |
196,978
-1,081,062
| -85% | -$10.2M |
|
2042
PUT
Nasdaq
NDAQ
$51.5B
| $1.96M | ﹤0.01% |
25,900
-63,700
| -71% | -$5.01M |
|
2043
PUT
Semtech
SMTC
$11.7B
| $1.96M | ﹤0.01% |
57,100
-800
| -1% | -$39.5K |
|
2044
Prudential Financial
PRU
$41.7B
| $1.96M | ﹤0.01% |
+17,582
| New | +$2M |
|
2045
CALL
Open Text
OTEX
$5.43B
| $1.96M | ﹤0.01% |
77,700
+35,800
| +85% | +$982K |
|
2046
CALL
Northern Oil and Gas
NOG
$2.3B
| $1.96M | ﹤0.01% |
64,900
-83,200
| -56% | -$2.85M |
|
2047
CALL
Pentair
PNR
$10.2B
| $1.96M | ﹤0.01% |
22,400
-29,500
| -57% | -$2.81M |
|
2048
PUT
Powell Industries
POWL
$8.46B
| $1.96M | ﹤0.01% |
34,500
+5,400
| +19% | +$376K |
|
2049
PUT
Moody's
MCO
$81.7B
| $1.96M | ﹤0.01% |
4,200
-10,900
| -72% | -$5.25M |
|
2050
PUT
Clean Harbors
CLH
$16.1B
| $1.95M | ﹤0.01% |
9,900
+9,000
| +1,000% | +$1.97M |
|
Similar funds
Simplex Trading's Q1 2025 Portfolio in Review
As of Q1 2025, Simplex Trading held 10,070 positions worth $156B, down 13% from $179B the previous quarter. Its ten largest holdings account for 51% of the portfolio.
Simplex Trading withdrew a net $7.93B in Q1 2025, closing 1,547 positions and reducing 3,654 holdings. Its most notable exit was Alibaba, an estimated $66.7M position sold in full.
By sector, the portfolio is most concentrated in Technology at 0.41% of assets, down from 0.68% a quarter earlier, followed by Consumer Discretionary and Healthcare.
Against the trend, Simplex Trading opened a new position in iShares 20+ Year Treasury Bond ETF worth $278M.
- Simplex Trading's largest Q1 2025 buy was iShares 20+ Year Treasury Bond ETF: 3,057,978 shares worth $278M.
- Simplex Trading added most to NVIDIA in Q1 2025, an estimated $89.9M increase.
- Simplex Trading's biggest Q1 2025 reduction was Apple, cutting an estimated $518M.
- Simplex Trading fully exited Alibaba in Q1 2025, selling an estimated $66.7M.
- Simplex Trading's ten largest holdings make up 51% of its $156B portfolio in Q1 2025.
- Simplex Trading opened 1,566 new positions and closed 1,547 in Q1 2025.
- Simplex Trading's portfolio value fell 13% quarter-over-quarter to $156B.
Based on Simplex Trading's 13F filing for Q1 2025, filed 12 May 2025.