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 |
Amazon
AMZN
|
+$168M |
| 2 |
NVIDIA
NVDA
|
+$141M |
| 3 |
TSMC
TSM
|
+$121M |
| 4 |
Meta Platforms (Facebook)
META
|
+$107M |
| 5 |
SPDR Gold Trust
GLD
|
+$103M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$174M |
| 2 |
Western Digital
WDC
|
+$87.7M |
| 3 |
Broadcom
AVGO
|
+$62.2M |
| 4 |
Direxion Daily Semiconductor Bull 3X ETF
SOXL
|
+$52M |
| 5 |
Netflix
NFLX
|
+$44.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.62% |
| 2 | Communication Services | 0.22% |
| 3 | Consumer Discretionary | 0.21% |
| 4 | Healthcare | 0.2% |
| 5 | Industrials | 0.1% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1001
CALL
DigitalBridge
DBRG
$2.94B
| $5.9M | ﹤0.01% |
382,500
-377,700
| -50% | -$5.81M |
|
1002
CALL
KeyCorp
KEY
$24.3B
| $5.9M | ﹤0.01% |
294,100
+138,900
| +89% | +$2.91M |
|
1003
CALL
Vanguard Consumer Discretionary ETF
VCR
$5.84B
| $5.88M | ﹤0.01% |
12,100
-14,700
| -55% | -$5.67M |
|
1004
CALL
Matador Resources
MTDR
$6.31B
| $5.88M | ﹤0.01% |
93,100
+30,600
| +49% | +$1.53M |
|
1005
CALL
Humana
HUM
$46.7B
| $5.88M | ﹤0.01% |
33,900
-56,100
| -62% | -$11.5M |
|
1006
CALL
Ross Stores
ROST
$76.6B
| $5.87M | ﹤0.01% |
27,100
-58,900
| -68% | -$11.7M |
|
1007
CALL
KB Home
KBH
$3.48B
| $5.87M | ﹤0.01% |
113,400
+65,200
| +135% | +$3.83M |
|
1008
CALL
Roper Technologies
ROP
$36.3B
| $5.84M | ﹤0.01% |
16,500
+16,300
| +8,150% | +$6.01M |
|
1009
CALL
Pultegroup
PHM
$24.5B
| $5.83M | ﹤0.01% |
49,600
-17,500
| -26% | -$2.24M |
|
1010
Penumbra
PEN
$12.5B
| $5.82M | ﹤0.01% |
17,719
+17,589
| +13,530% | +$5.96M |
|
1011
Moog Inc Class A
MOG.A
$13B
| $5.81M | ﹤0.01% |
19,867
+11,742
| +145% | +$3.59M |
|
1012
CALL
SAP
SAP
$187B
| $5.8M | ﹤0.01% |
33,900
-28,600
| -46% | -$5.9M |
|
1013
PUT
Cogent Biosciences
COGT
$6.79B
| $5.8M | ﹤0.01% |
150,700
+82,100
| +120% | +$3.03M |
|
|
GLXY
1014
PUT
Galaxy Digital Inc
GLXY
$4.34B
| $5.8M | ﹤0.01% |
314,200
+129,700
| +70% | +$3.08M |
|
1015
CALL
XP
XP
$8.62B
| $5.79M | ﹤0.01% |
304,300
+209,500
| +221% | +$4.05M |
|
1016
CALL
Emerson Electric
EMR
$82.9B
| $5.76M | ﹤0.01% |
44,000
-27,000
| -38% | -$3.88M |
|
1017
PUT
Zoom
ZM
$25.8B
| $5.76M | ﹤0.01% |
71,600
-119,800
| -63% | -$10M |
|
1018
CALL
CRH
CRH
$66.7B
| $5.75M | ﹤0.01% |
54,700
-43,100
| -44% | -$5.06M |
|
1019
CALL
Dominion Energy
D
$62.5B
| $5.74M | ﹤0.01% |
92,800
-97,600
| -51% | -$6.03M |
|
1020
Strategy Inc
MSTR
$33.5B
| $5.73M | ﹤0.01% |
+45,923
| New | +$6.56M |
|
1021
iShares China Large-Cap ETF
FXI
$4.31B
| $5.71M | ﹤0.01% |
159,011
+135,269
| +570% | +$5.15M |
|
|
VTEL
1022
PUT
Vanguard Long-Term Tax-Exempt Bond ETF
VTEL
$280M
| $5.71M | ﹤0.01% |
114,400
+105,600
| +1,200% | +$11M |
|
1023
CALL
Futu Holdings
FUTU
$13.9B
| $5.7M | ﹤0.01% |
41,700
-119,200
| -74% | -$18.5M |
|
1024
CALL
Agilent Technologies
A
$39.1B
| $5.7M | ﹤0.01% |
50,000
+24,400
| +95% | +$3.1M |
|
1025
CALL
Valaris
VAL
$5.51B
| $5.7M | ﹤0.01% |
58,100
-13,600
| -19% | -$1.06M |
|
Similar funds
Simplex Trading's Q1 2026 Portfolio in Review
As of Q1 2026, Simplex Trading held 10,500 positions worth $149B, down 16% from $177B the previous quarter. Its ten largest holdings account for 51% of the portfolio.
Simplex Trading withdrew a net $18.1B in Q1 2026, closing 1,574 positions and reducing 3,926 holdings. Its most notable exit was Direxion Daily Semiconductor Bull 3X ETF, an estimated $52M position sold in full.
By sector, the portfolio is most concentrated in Technology at 0.62% of assets, up from 0.59% a quarter earlier, followed by Communication Services and Consumer Discretionary.
Against the trend, Simplex Trading opened a new position in Amazon worth $159M.
- Simplex Trading's largest Q1 2026 buy was Amazon: 764,884 shares worth $159M.
- Simplex Trading added most to NVIDIA in Q1 2026, an estimated $141M increase.
- Simplex Trading's biggest Q1 2026 reduction was Apple, cutting an estimated $174M.
- Simplex Trading fully exited Direxion Daily Semiconductor Bull 3X ETF in Q1 2026, selling an estimated $52M.
- Simplex Trading's ten largest holdings make up 51% of its $149B portfolio in Q1 2026.
- Simplex Trading opened 2,156 new positions and closed 1,574 in Q1 2026.
- Simplex Trading's portfolio value fell 16% quarter-over-quarter to $149B.
Based on Simplex Trading's 13F filing for Q1 2026, filed 14 May 2026.