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 | |
|---|---|---|---|---|---|---|
576
CALL
Astera Labs
ALAB
$56B
| $13.3M | 0.01% |
121,300
-229,000
| -65% | -$32.6M |
|
577
PUT
YieldMax TSLA Option Income Strategy ETF
TSLY
$623M
| $13.3M | 0.01% |
482,400
-599,100
| -55% | -$20.1M |
|
578
CALL
EOG Resources
EOG
$77.5B
| $13.2M | 0.01% |
91,500
-14,200
| -13% | -$1.72M |
|
579
PUT
GraniteShares Bloomberg Commodity Broad Strategy No K-1 ETF
COMB
$136M
| $13.2M | 0.01% |
404,800
-116,200
| -22% | -$2.75M |
|
580
CALL
Biogen
BIIB
$29.6B
| $13.2M | 0.01% |
71,900
+13,400
| +23% | +$2.47M |
|
581
CALL
Riot Platforms
RIOT
$9.02B
| $13.2M | 0.01% |
1,065,700
-2,551,900
| -71% | -$39.1M |
|
582
CALL
TJX Companies
TJX
$170B
| $13.1M | 0.01% |
82,300
-30,500
| -27% | -$4.75M |
|
583
CALL
Dollar General
DG
$25.4B
| $13.1M | 0.01% |
110,600
-70,300
| -39% | -$10M |
|
|
BULL
584
CALL
Webull Corp
BULL
$4.17B
| $13.1M | 0.01% |
2,732,500
+503,300
| +23% | +$3.26M |
|
585
PUT
DoorDash
DASH
$74B
| $13.1M | 0.01% |
87,300
-37,500
| -30% | -$6.93M |
|
586
Union Pacific
UNP
$181B
| $13.1M | 0.01% |
54,003
+51,913
| +2,484% | +$12.7M |
|
587
CALL
Danaher
DHR
$135B
| $13.1M | 0.01% |
69,100
-53,600
| -44% | -$11.4M |
|
588
PUT
Vertex Pharmaceuticals
VRTX
$120B
| $13.1M | 0.01% |
29,300
+2,600
| +10% | +$1.21M |
|
589
PUT
Valero Energy
VLO
$90.6B
| $13.1M | 0.01% |
52,900
-57,100
| -52% | -$11.8M |
|
590
PUT
iShares Core MSCI Emerging Markets ETF
IEMG
$152B
| $13.1M | 0.01% |
166,200
+50,100
| +43% | +$3.62M |
|
591
CALL
Williams Companies
WMB
$92B
| $13M | 0.01% |
179,300
+7,700
| +4% | +$533K |
|
592
CALL
MPLX
MPLX
$58.4B
| $13M | 0.01% |
227,000
-57,600
| -20% | -$3.27M |
|
593
CALL
Affirm
AFRM
$23.8B
| $12.9M | 0.01% |
281,300
-144,400
| -34% | -$8.34M |
|
594
PUT
Interactive Brokers
IBKR
$40.9B
| $12.8M | 0.01% |
+190,400
| New | +$13.6M |
|
595
CALL
United Rentals
URI
$70.9B
| $12.7M | 0.01% |
17,500
+2,600
| +17% | +$2.18M |
|
596
CALL
Regeneron Pharmaceuticals
REGN
$68.3B
| $12.7M | 0.01% |
16,500
-25,700
| -61% | -$19.7M |
|
597
CALL
Kenvue
KVUE
$36.3B
| $12.7M | 0.01% |
739,300
-1,307,400
| -64% | -$23.3M |
|
598
CALL
Oneok
OKE
$58.7B
| $12.7M | 0.01% |
140,800
-77,800
| -36% | -$6.41M |
|
599
CALL
Suncor Energy
SU
$78.4B
| $12.7M | 0.01% |
191,700
+82,400
| +75% | +$4.55M |
|
600
CALL
Bunge Global
BG
$23.7B
| $12.7M | 0.01% |
99,600
+48,100
| +93% | +$5.58M |
|
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.