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 | |
|---|---|---|---|---|---|---|
|
CWAN
676
CALL
DELISTED
Clearwater Analytics
CWAN
| $10.6M | 0.01% |
+448,800
| New | +$10.6M |
|
677
CALL
Las Vegas Sands
LVS
$30.3B
| $10.5M | 0.01% |
195,500
-320,100
| -62% | -$18.2M |
|
678
PUT
Penumbra
PEN
$12.5B
| $10.5M | 0.01% |
32,000
+31,700
| +10,567% | +$10.7M |
|
679
PUT
MP Materials
MP
$7.47B
| $10.4M | 0.01% |
216,400
-216,800
| -50% | -$13M |
|
680
CALL
UBS Group
UBS
$170B
| $10.4M | 0.01% |
267,000
+28,300
| +12% | +$1.21M |
|
681
CALL
Tower Semiconductor
TSEM
$27B
| $10.4M | 0.01% |
59,400
+9,100
| +18% | +$1.22M |
|
682
CALL
Linde
LIN
$236B
| $10.4M | 0.01% |
21,000
-30,900
| -60% | -$14.6M |
|
683
PUT
Sea Limited
SE
$61.6B
| $10.4M | 0.01% |
125,300
-73,700
| -37% | -$7.9M |
|
684
CALL
LyondellBasell Industries
LYB
$19.7B
| $10.3M | 0.01% |
128,400
-39,300
| -23% | -$2.33M |
|
685
CALL
Equinox Gold
EQX
$7.4B
| $10.3M | 0.01% |
714,400
+315,300
| +79% | +$4.82M |
|
686
CALL
Brookfield
BN
$102B
| $10.3M | 0.01% |
268,900
+59,600
| +28% | +$2.64M |
|
687
PUT
Boston Scientific
BSX
$66B
| $10.2M | 0.01% |
163,200
-167,200
| -51% | -$13.4M |
|
688
CALL
Chewy
CHWY
$8.56B
| $10.2M | 0.01% |
378,800
+63,600
| +20% | +$1.77M |
|
|
689
PUT
Las Vegas Sands
LVS
$30.3B
| $10.2M | 0.01% |
189,700
-214,800
| -53% | -$12.2M |
|
690
CALL
Johnson Controls International
JCI
$87.4B
| $10.2M | 0.01% |
78,000
-14,100
| -15% | -$1.82M |
|
691
CALL
Eos Energy Enterprises
EOSE
$1.27B
| $10.2M | 0.01% |
2,057,600
-61,700
| -3% | -$663K |
|
692
CALL
Applied Optoelectronics
AAOI
$8.22B
| $10.2M | 0.01% |
120,500
+42,400
| +54% | +$2.71M |
|
693
PUT
US Bancorp Series B Preferred Stock
USB.PRH
$744M
| $10.2M | 0.01% |
195,300
-204,100
| -51% | -$3.85M |
|
694
ServiceNow
NOW
$101B
| $10.1M | 0.01% |
96,638
+53,464
| +124% | +$6.29M |
|
|
695
Apple
AAPL
$4.89T
| $10.1M | 0.01% |
39,784
-668,957
| -94% | -$174M |
|
696
CALL
ImmunityBio
IBRX
$7.54B
| $10.1M | 0.01% |
1,315,300
+881,300
| +203% | +$6.03M |
|
697
Astera Labs
ALAB
$51B
| $10.1M | 0.01% |
+91,866
| New | +$13.1M |
|
698
CALL
Enbridge
ENB
$124B
| $10M | 0.01% |
185,400
+98,400
| +113% | +$5.01M |
|
699
PUT
State Street SPDR Portfolio Europe ETF
SPEU
$715M
| $10M | 0.01% |
161,000
-44,900
| -22% | -$2.4M |
|
700
PUT
Teva Pharmaceuticals
TEVA
$36B
| $9.97M | 0.01% |
+330,900
| New | +$10.6M |
|
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.