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 | |
|---|---|---|---|---|---|---|
1426
CALL
Public Service Enterprise Group
PEG
$39.8B
| $3.29M | ﹤0.01% |
+40,600
| New | +$3.33M |
|
1427
ProShares UltraShort Gold
GLL
$128M
| $3.29M | ﹤0.01% |
162,855
+13,783
| +9% | +$272K |
|
1428
PUT
argenx
ARGX
$57.4B
| $3.29M | ﹤0.01% |
4,500
+3,600
| +400% | +$2.82M |
|
1429
PUT
QuantumScape Corp
QS
$3B
| $3.28M | ﹤0.01% |
514,300
-912,600
| -64% | -$7.58M |
|
1430
PUT
Crown Castle
CCI
$32.7B
| $3.28M | ﹤0.01% |
40,300
-13,500
| -25% | -$1.16M |
|
1431
PUT
Gildan
GIL
$9.25B
| $3.26M | ﹤0.01% |
58,600
-496,300
| -89% | -$32.1M |
|
1432
CALL
Bitwise Bitcoin ETF
BITB
$2.46B
| $3.26M | ﹤0.01% |
88,500
-126,600
| -59% | -$5.25M |
|
1433
CALL
Galicia Financial Group
GGAL
$7.92B
| $3.26M | ﹤0.01% |
+69,700
| New | +$3.39M |
|
1434
CALL
Range Resources
RRC
$9.11B
| $3.25M | ﹤0.01% |
72,000
+8,900
| +14% | +$347K |
|
1435
CALL
KE Holdings
BEKE
$16.8B
| $3.25M | ﹤0.01% |
217,100
-540,800
| -71% | -$9.28M |
|
1436
PUT
Advance Auto Parts
AAP
$3.37B
| $3.25M | ﹤0.01% |
61,600
-90,100
| -59% | -$4.51M |
|
1437
PUT
Celanese
CE
$5.09B
| $3.24M | ﹤0.01% |
49,300
-50,300
| -51% | -$2.63M |
|
1438
PUT
Knight Transportation
KNX
$11.8B
| $3.24M | ﹤0.01% |
+56,200
| New | +$3.22M |
|
1439
TechnipFMC
FTI
$30.6B
| $3.22M | ﹤0.01% |
+46,617
| New | +$2.8M |
|
1440
CALL
DexCom
DXCM
$27.6B
| $3.22M | ﹤0.01% |
51,300
-152,000
| -75% | -$10.6M |
|
1441
CALL
Kohl's
KSS
$2.03B
| $3.22M | ﹤0.01% |
249,700
-209,900
| -46% | -$3.54M |
|
1442
CALL
BioMarin Pharmaceuticals
BMRN
$11.5B
| $3.22M | ﹤0.01% |
57,000
-30,000
| -34% | -$1.75M |
|
1443
PUT
Schwab US Broad Market ETF
SCHB
$42.8B
| $3.22M | ﹤0.01% |
106,200
-21,000
| -17% | -$551K |
|
1444
Equinix
EQIX
$107B
| $3.21M | ﹤0.01% |
3,279
+2,469
| +305% | +$2.2M |
|
1445
CALL
Element Solutions
ESI
$9.12B
| $3.21M | ﹤0.01% |
94,000
+91,500
| +3,660% | +$2.87M |
|
1446
CALL
Yum! Brands
YUM
$41B
| $3.2M | ﹤0.01% |
20,600
+1,900
| +10% | +$301K |
|
1447
PUT
Bitdeer Technologies
BTDR
$2.81B
| $3.2M | ﹤0.01% |
370,100
+73,900
| +25% | +$777K |
|
1448
CALL
SBA Communications
SBAC
$18.4B
| $3.2M | ﹤0.01% |
18,600
+16,700
| +879% | +$3.13M |
|
1449
Annaly Capital Management
NLY
$16.9B
| $3.2M | ﹤0.01% |
+151,291
| New | +$3.45M |
|
|
VZLA
1450
CALL
Vizsla Silver
VZLA
$1.16B
| $3.18M | ﹤0.01% |
963,400
+552,300
| +134% | +$2.53M |
|
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.