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 | |
|---|---|---|---|---|---|---|
351
CALL
Dow Inc
DOW
$22.3B
| $26.8M | 0.02% |
647,800
-715,400
| -52% | -$22.7M |
|
|
B
352
PUT
Barrick Mining
B
$62.3B
| $26.7M | 0.02% |
655,200
-622,600
| -49% | -$28.8M |
|
353
PUT
Rocket Lab Corp
RKLB
$43.7B
| $26.6M | 0.02% |
413,900
-671,400
| -62% | -$50.6M |
|
354
CALL
ProShares UltraPro Short QQQ
SQQQ
$2.14B
| $26.4M | 0.02% |
345,300
-1,890,800
| -85% | -$134M |
|
355
PUT
Airbnb
ABNB
$81.6B
| $26.4M | 0.02% |
209,100
-82,800
| -28% | -$10.8M |
|
356
Cigna
CI
$75.7B
| $26.2M | 0.02% |
98,203
-41,822
| -30% | -$11.6M |
|
357
PUT
General Motors
GM
$73B
| $26.1M | 0.02% |
350,900
-435,400
| -55% | -$34.6M |
|
358
CALL
AbbVie
ABBV
$454B
| $26.1M | 0.02% |
120,000
-73,200
| -38% | -$16.2M |
|
359
PUT
Analog Devices
ADI
$185B
| $25.7M | 0.02% |
80,800
-24,400
| -23% | -$7.76M |
|
|
SHNY
360
CALL
DELISTED
Direxion Daily Silver Miners Index Bull 2X Shares
SHNY
| $25.4M | 0.02% |
950,000
+183,900
| +24% | +$4.91M |
|
361
CALL
Intuitive Surgical
ISRG
$119B
| $25.4M | 0.02% |
55,000
-56,500
| -51% | -$28.6M |
|
|
362
PUT
AbbVie
ABBV
$454B
| $25.3M | 0.02% |
116,300
-133,400
| -53% | -$29.6M |
|
363
PUT
Akamai
AKAM
$17.1B
| $25.3M | 0.02% |
220,100
-45,000
| -17% | -$4.51M |
|
364
PUT
Cameco
CCJ
$38.9B
| $25.2M | 0.02% |
232,000
-8,200
| -3% | -$938K |
|
365
PUT
Bristol-Myers Squibb
BMY
$126B
| $25.1M | 0.02% |
414,400
-491,200
| -54% | -$28.6M |
|
|
366
CALL
General Motors
GM
$73B
| $25M | 0.02% |
335,900
-169,700
| -34% | -$13.5M |
|
367
CALL
Xtrackers MSCI Emerging Markets Hedged Equity ETF
DBEM
$107M
| $24.9M | 0.02% |
762,900
+332,200
| +77% | +$11.5M |
|
368
PUT
RTX Corp
RTX
$282B
| $24.7M | 0.02% |
128,300
-91,600
| -42% | -$18.2M |
|
369
CALL
Constellation Energy
CEG
$98.4B
| $24.7M | 0.02% |
88,500
-16,000
| -15% | -$4.86M |
|
370
PUT
GameStop
GME
$9.58B
| $24.6M | 0.02% |
1,408,100
-54,100
| -4% | -$1.26M |
|
371
CALL
Blackstone
BX
$152B
| $24.5M | 0.02% |
213,400
-106,500
| -33% | -$13.9M |
|
372
PUT
FedEx
FDX
$74.7B
| $24.5M | 0.02% |
68,800
-105,400
| -61% | -$36.6M |
|
373
CALL
Home Depot
HD
$324B
| $24.3M | 0.02% |
74,000
-23,200
| -24% | -$8.45M |
|
374
PUT
Vistra
VST
$57B
| $24.3M | 0.02% |
161,600
-62,300
| -28% | -$10.1M |
|
|
SCHW
375
PUT
Charles Schwab
SCHW
$177B
| $24.2M | 0.02% |
257,500
-81,700
| -24% | -$8.01M |
|
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.