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 | Miscellaneous | 98.3% |
| 2 | Technology | 0.62% |
| 3 | Communication Services | 0.22% |
| 4 | Consumer Discretionary | 0.21% |
| 5 | Healthcare | 0.2% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
476
CALL
EQT Corp
EQT
$31.2B
| $17.3M | 0.01% |
272,500
-80,400
| -23% | -$4.71M |
|
477
CALL
The Kraft Heinz Company
KHC
$27.9B
| $17.3M | 0.01% |
769,400
-349,000
| -31% | -$8.21M |
|
478
CALL
Waste Management
WM
$82.5B
| $17.3M | 0.01% |
75,100
+47,300
| +170% | +$10.9M |
|
479
CALL
Archer Daniels Midland
ADM
$38.7B
| $17.2M | 0.01% |
237,200
-90,100
| -28% | -$6.08M |
|
480
CALL
Workday
WDAY
$45.5B
| $17.2M | 0.01% |
132,500
+78,300
| +144% | +$12.4M |
|
481
PUT
Applied Optoelectronics
AAOI
$8.22B
| $17.2M | 0.01% |
203,500
-311,600
| -60% | -$19.9M |
|
482
PUT
United Therapeutics
UTHR
$20.8B
| $17.2M | 0.01% |
+29,000
| New | +$14.4M |
|
483
PUT
Amgen
AMGN
$226B
| $17.2M | 0.01% |
48,800
-7,700
| -14% | -$2.75M |
|
484
CALL
Fidelity Wise Origin Bitcoin Fund
FBTC
$15.5B
| $17.2M | 0.01% |
+290,700
| New | +$19.3M |
|
485
CALL
Blackrock
BLK
$166B
| $17.1M | 0.01% |
17,800
+600
| +3% | +$631K |
|
486
CALL
Teucrium Corn Fund
CORN
$142M
| $17.1M | 0.01% |
811,400
+382,200
| +89% | +$6.81M |
|
487
PUT
Union Pacific
UNP
$163B
| $16.9M | 0.01% |
69,500
+900
| +1% | +$220K |
|
488
CALL
Norwegian Cruise Line
NCLH
$6.57B
| $16.8M | 0.01% |
+899,300
| New | +$19.6M |
|
489
CALL
Duolingo
DUOL
$6.28B
| $16.7M | 0.01% |
169,900
+2,000
| +1% | +$247K |
|
490
CALL
Marathon Petroleum
MPC
$109B
| $16.7M | 0.01% |
68,200
-11,000
| -14% | -$2.22M |
|
491
PUT
Regeneron Pharmaceuticals
REGN
$77.4B
| $16.6M | 0.01% |
21,500
-15,700
| -42% | -$12M |
|
492
PUT
T-Mobile US
TMUS
$179B
| $16.6M | 0.01% |
78,800
-13,300
| -14% | -$2.73M |
|
|
METD
493
PUT
Direxion Daily META Bear 1X ETF
METD
$15M
| $16.5M | 0.01% |
310,500
-2,300
| -0.7% | -$37.3K |
|
494
CALL
Synopsys
SNPS
$80B
| $16.4M | 0.01% |
41,400
-29,800
| -42% | -$13.5M |
|
495
CALL
CF Industries
CF
$17.5B
| $16.4M | 0.01% |
126,400
+69,400
| +122% | +$7.08M |
|
|
496
PUT
Duolingo
DUOL
$6.28B
| $16.4M | 0.01% |
166,000
+132,000
| +388% | +$16.3M |
|
497
CALL
iShares Core MSCI Emerging Markets ETF
IEMG
$161B
| $16.3M | 0.01% |
218,500
+152,900
| +233% | +$11M |
|
|
498
PUT
CF Industries
CF
$17.5B
| $16.3M | 0.01% |
125,200
+60,200
| +93% | +$6.14M |
|
499
CALL
KLA
KLAC
$247B
| $16.2M | 0.01% |
110,000
-42,000
| -28% | -$6.14M |
|
500
PUT
Futu Holdings
FUTU
$15.7B
| $16.2M | 0.01% |
118,300
-132,400
| -53% | -$20.6M |
|
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's Q1 2026 filing shows 2,157 new, 2,651 increased, 3,926 reduced and 1,574 closed positions. Its largest new stake was Amazon: 764,884 shares worth $159M. The largest sale was Apple, an estimated $174M.
By sector, the portfolio is most concentrated in Miscellaneous at 98% of assets, up from 98% a quarter earlier, followed by Technology and Communication Services.
- 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 2,157 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.