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 | |
|---|---|---|---|---|---|---|
2976
CALL
Ambarella
AMBA
$3.04B
| $643K | ﹤0.01% |
12,500
-22,700
| -64% | -$1.42M |
|
2977
Brookfield Asset Management
BAM
$75.6B
| $643K | ﹤0.01% |
+14,463
| New | +$706K |
|
2978
PUT
Axsome Therapeutics
AXSM
$11.7B
| $642K | ﹤0.01% |
3,800
-20,900
| -85% | -$3.61M |
|
2979
PUT
Skyward Specialty Insurance
SKWD
$2.53B
| $642K | ﹤0.01% |
+14,700
| New | +$668K |
|
2980
CALL
Weibo
WB
$1.97B
| $641K | ﹤0.01% |
73,300
-82,800
| -53% | -$831K |
|
|
CIM
2981
CALL
Chimera Investment
CIM
$1.06B
| $641K | ﹤0.01% |
51,100
+25,000
| +96% | +$326K |
|
2982
Strive Inc
ASST
$930M
| $641K | ﹤0.01% |
+63,975
| New | +$796K |
|
2983
Bath & Body Works
BBWI
$3.97B
| $640K | ﹤0.01% |
34,304
-3,562
| -9% | -$77K |
|
2984
CALL
Tactile Systems Technology
TCMD
$618M
| $640K | ﹤0.01% |
24,500
+24,300
| +12,150% | +$693K |
|
2985
CALL
Patterson-UTI
PTEN
$3.54B
| $640K | ﹤0.01% |
59,100
-316,200
| -84% | -$2.71M |
|
2986
Algoma Steel
ASTL
$450M
| $640K | ﹤0.01% |
154,905
+80,777
| +109% | +$350K |
|
2987
PUT
Willis Towers Watson
WTW
$29.8B
| $640K | ﹤0.01% |
+2,200
| New | +$675K |
|
2988
PUT
Wave Life Sciences
WVE
$1.12B
| $639K | ﹤0.01% |
88,200
-100,900
| -53% | -$1.31M |
|
2989
CALL
Marriott Vacations Worldwide
VAC
$3.53B
| $638K | ﹤0.01% |
+9,800
| New | +$607K |
|
2990
PUT
Viridian Therapeutics
VRDN
$2.2B
| $638K | ﹤0.01% |
+32,600
| New | +$968K |
|
2991
CALL
Paylocity
PCTY
$7.75B
| $637K | ﹤0.01% |
5,900
+5,000
| +556% | +$614K |
|
2992
CALL
Newell Brands
NWL
$2.21B
| $637K | ﹤0.01% |
185,700
-120,900
| -39% | -$508K |
|
2993
CALL
Hayward Holdings
HAYW
$3.23B
| $637K | ﹤0.01% |
47,600
+44,400
| +1,388% | +$691K |
|
2994
CALL
WEC Energy
WEC
$36.3B
| $637K | ﹤0.01% |
5,500
+1,800
| +49% | +$202K |
|
2995
PUT
GoDaddy
GDDY
$13.9B
| $637K | ﹤0.01% |
7,700
-9,700
| -56% | -$921K |
|
2996
CALL
Donaldson
DCI
$10.7B
| $637K | ﹤0.01% |
7,500
+6,600
| +733% | +$637K |
|
2997
Blackstone
BX
$104B
| $636K | ﹤0.01% |
+5,533
| New | +$720K |
|
|
BABO
2998
CALL
YieldMax BABA Option Income Strategy ETF
BABO
$17.6M
| $636K | ﹤0.01% |
18,900
-108,100
| -85% | -$1.37M |
|
|
TRON
2999
CALL
Tron Inc
TRON
$693M
| $634K | ﹤0.01% |
279,100
+51,300
| +23% | +$80.7K |
|
3000
Nutanix
NTNX
$16.1B
| $634K | ﹤0.01% |
+16,667
| New | +$702K |
|
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.