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 | |
|---|---|---|---|---|---|---|
326
CALL
Centene
CNC
$31.5B
| $29.9M | 0.02% |
914,700
-400,500
| -30% | -$16.4M |
|
327
PUT
Albemarle
ALB
$13.8B
| $29.9M | 0.02% |
166,600
-148,900
| -47% | -$25.4M |
|
328
CALL
Wynn Resorts
WYNN
$10B
| $29.8M | 0.02% |
293,000
-9,400
| -3% | -$1.03M |
|
329
PUT
Cloudflare
NET
$93.1B
| $29.7M | 0.02% |
144,100
+25,400
| +21% | +$4.84M |
|
330
CALL
Core Scientific
CORZ
$7.62B
| $29.7M | 0.02% |
1,986,700
-1,001,600
| -34% | -$17.1M |
|
331
PUT
ARK Space & Defense Innovation ETF
ARKX
$817M
| $29.6M | 0.02% |
470,000
-740,700
| -61% | -$23.7M |
|
332
PUT
ConocoPhillips
COP
$146B
| $29.4M | 0.02% |
223,100
-107,200
| -32% | -$11.9M |
|
333
PUT
Snowflake
SNOW
$91.9B
| $29.3M | 0.02% |
194,600
-418,400
| -68% | -$77.4M |
|
334
CALL
Halliburton
HAL
$27.3B
| $29.3M | 0.02% |
751,400
-305,800
| -29% | -$10.6M |
|
335
PUT
Baidu
BIDU
$36.5B
| $28.7M | 0.02% |
257,900
-177,800
| -41% | -$24.1M |
|
336
CALL
First Majestic Silver
AG
$8.12B
| $28.7M | 0.02% |
1,336,300
-461,300
| -26% | -$10.6M |
|
337
PUT
Coherent
COHR
$61.3B
| $28.5M | 0.02% |
119,500
-2,500
| -2% | -$572K |
|
338
PUT
KKR & Co
KKR
$86.2B
| $28.4M | 0.02% |
306,600
-27,900
| -8% | -$2.94M |
|
339
PUT
Alcoa
AA
$11.9B
| $28.3M | 0.02% |
427,300
-70,100
| -14% | -$4.3M |
|
340
SLB Ltd
SLB
$70.6B
| $28.1M | 0.02% |
547,131
+68,056
| +14% | +$3.3M |
|
341
CALL
Vale
VALE
$63.1B
| $28.1M | 0.02% |
1,767,100
-409,600
| -19% | -$6.39M |
|
342
CALL
RTX Corp
RTX
$282B
| $28.1M | 0.02% |
145,500
-98,400
| -40% | -$19.6M |
|
343
PUT
Philip Morris
PM
$298B
| $27.9M | 0.02% |
168,900
-70,000
| -29% | -$12.2M |
|
|
XYZ
344
CALL
Block Inc
XYZ
$45.5B
| $27.9M | 0.02% |
464,000
-477,800
| -51% | -$29.1M |
|
345
CALL
Spotify
SPOT
$96.4B
| $27.9M | 0.02% |
57,500
+26,400
| +85% | +$13.2M |
|
346
CALL
Mastercard
MA
$469B
| $27.7M | 0.02% |
55,500
-3,200
| -5% | -$1.69M |
|
347
CALL
Enterprise Products Partners
EPD
$83.9B
| $27.7M | 0.02% |
732,000
-155,500
| -18% | -$5.5M |
|
348
CALL
CVS Health
CVS
$136B
| $27.5M | 0.02% |
383,000
-378,400
| -50% | -$29.1M |
|
349
CALL
Fair Isaac
FICO
$28B
| $27.3M | 0.02% |
25,600
+17,500
| +216% | +$24M |
|
350
CALL
Ford
F
$56.4B
| $27.2M | 0.02% |
2,357,100
-318,800
| -12% | -$4.2M |
|
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.