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 | |
|---|---|---|---|---|---|---|
601
CALL
Caesars Entertainment
CZR
$6.09B
| $12.6M | 0.01% |
+477,100
| New | +$11.3M |
|
602
CALL
Credo Technology Group
CRDO
$44.1B
| $12.6M | 0.01% |
+134,200
| New | +$16.3M |
|
603
PUT
Hims & Hers Health
HIMS
$7.58B
| $12.6M | 0.01% |
605,000
-230,800
| -28% | -$5.45M |
|
604
PUT
HSBC
HSBC
$349B
| $12.5M | 0.01% |
152,100
-27,300
| -15% | -$2.31M |
|
605
PUT
Capital One
COF
$123B
| $12.5M | 0.01% |
68,700
-51,300
| -43% | -$10.7M |
|
606
PUT
Blue Owl Capital
OWL
$6.22B
| $12.5M | 0.01% |
1,371,900
+457,400
| +50% | +$5.53M |
|
607
CALL
Fortinet
FTNT
$111B
| $12.5M | 0.01% |
152,600
-28,900
| -16% | -$2.33M |
|
608
CALL
Oscar Health
OSCR
$8.72B
| $12.5M | 0.01% |
1,086,700
-621,000
| -36% | -$8.75M |
|
609
PUT
Novartis
NVS
$297B
| $12.5M | 0.01% |
81,600
-27,600
| -25% | -$4.23M |
|
|
PPLT
610
CALL
abrdn Physical Platinum Shares ETF
PPLT
$1.82B
| $12.3M | 0.01% |
692,000
+53,000
| +8% | +$1.06M |
|
611
CALL
Hecla Mining
HL
$10.3B
| $12.3M | 0.01% |
661,000
-623,900
| -49% | -$14M |
|
612
CALL
Southwest Airlines
LUV
$21.9B
| $12.3M | 0.01% |
327,200
+252,000
| +335% | +$11.4M |
|
613
CALL
Vanguard Emerging Markets Government Bond ETF
VWOB
$6.14B
| $12.3M | 0.01% |
84,500
-1,400
| -2% | -$94.1K |
|
|
BNY
614
CALL
Bank of New York Mellon
BNY
$109B
| $12.3M | 0.01% |
103,400
+5,700
| +6% | +$678K |
|
615
PUT
The Mosaic Company
MOS
$7.08B
| $12.3M | 0.01% |
480,500
+229,000
| +91% | +$6.28M |
|
616
CALL
SiriusXM
SIRI
$10.1B
| $12.2M | 0.01% |
529,400
-50,300
| -9% | -$1.08M |
|
617
PUT
Blackrock
BLK
$161B
| $12.2M | 0.01% |
12,700
-19,700
| -61% | -$20.7M |
|
618
CALL
Electronic Arts
EA
$52.4B
| $12.2M | 0.01% |
59,900
+13,000
| +28% | +$2.62M |
|
619
CALL
British American Tobacco
BTI
$129B
| $12.2M | 0.01% |
208,100
-140,100
| -40% | -$8.29M |
|
|
B
620
Barrick Mining
B
$62.3B
| $12.2M | 0.01% |
297,916
+41,749
| +16% | +$1.93M |
|
621
PUT
APA Corp
APA
$12.9B
| $12.1M | 0.01% |
285,500
-143,000
| -33% | -$4.32M |
|
622
CALL
CleanSpark
CLSK
$4.01B
| $12.1M | 0.01% |
1,422,300
-1,577,900
| -53% | -$16.9M |
|
623
CALL
Canadian Natural Resources
CNQ
$98B
| $12.1M | 0.01% |
248,100
-88,000
| -26% | -$3.62M |
|
624
CALL
State Street SPDR S&P MIDCAP 400 ETF Trust
MDY
$26.9B
| $12.1M | 0.01% |
19,600
-50,700
| -72% | -$32.1M |
|
625
PUT
Dick's Sporting Goods
DKS
$18.3B
| $12.1M | 0.01% |
60,800
-34,200
| -36% | -$6.94M |
|
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.