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 | |
|---|---|---|---|---|---|---|
2376
CALL
Canadian Pacific Kansas City
CP
$81.4B
| $1.13M | ﹤0.01% |
+14,400
| New | +$1.14M |
|
2377
PUT
Service Corp International
SCI
$11.7B
| $1.13M | ﹤0.01% |
13,700
+13,400
| +4,467% | +$1.08M |
|
2378
CALL
Doximity
DOCS
$3.85B
| $1.13M | ﹤0.01% |
48,500
-53,600
| -52% | -$1.67M |
|
|
HNGE
2379
PUT
Hinge Health
HNGE
$5.82B
| $1.13M | ﹤0.01% |
29,300
+25,800
| +737% | +$1.07M |
|
2380
PUT
Nordic American Tanker
NAT
$1.35B
| $1.13M | ﹤0.01% |
+192,700
| New | +$912K |
|
2381
PUT
BrightSpring Health Services
BTSG
$14.2B
| $1.13M | ﹤0.01% |
+26,500
| New | +$1.07M |
|
|
NVMI
2382
CALL
Nova
NVMI
$12.8B
| $1.13M | ﹤0.01% |
2,600
-1,100
| -30% | -$484K |
|
2383
PUT
Alpha Metallurgical Resources
AMR
$1.84B
| $1.13M | ﹤0.01% |
+5,500
| New | +$1.11M |
|
2384
PUT
Ternium
TX
$9.68B
| $1.13M | ﹤0.01% |
28,100
+27,200
| +3,022% | +$1.13M |
|
|
TGB
2385
CALL
Trekor Metals
TGB
$2.52B
| $1.13M | ﹤0.01% |
174,900
+32,700
| +23% | +$238K |
|
2386
PUT
Fresenius Medical Care
FMS
$13.3B
| $1.13M | ﹤0.01% |
50,000
+17,400
| +53% | +$400K |
|
|
CWAN
2387
PUT
DELISTED
Clearwater Analytics
CWAN
| $1.13M | ﹤0.01% |
+47,600
| New | +$1.13M |
|
2388
CALL
Bit Digital
BTBT
$459M
| $1.12M | ﹤0.01% |
858,200
-1,395,100
| -62% | -$2.56M |
|
2389
CALL
Forward Air
FWRD
$467M
| $1.12M | ﹤0.01% |
67,200
-198,300
| -75% | -$4.83M |
|
2390
Opendoor
OPEN
$3.8B
| $1.12M | ﹤0.01% |
269,150
+86,391
| +47% | +$466K |
|
2391
PUT
Aflac
AFL
$65.9B
| $1.12M | ﹤0.01% |
10,200
-16,400
| -62% | -$1.82M |
|
2392
HDFC Bank
HDB
$121B
| $1.12M | ﹤0.01% |
44,911
-10,219
| -19% | -$318K |
|
2393
CALL
RELX
RELX
$66B
| $1.12M | ﹤0.01% |
33,700
+31,900
| +1,772% | +$1.12M |
|
2394
CALL
Coursera
COUR
$1.68B
| $1.12M | ﹤0.01% |
191,900
-6,500
| -3% | -$40.6K |
|
2395
CALL
Wingstop
WING
$3.67B
| $1.12M | ﹤0.01% |
7,200
-17,900
| -71% | -$4.3M |
|
2396
Western Midstream Partners
WES
$19.4B
| $1.12M | ﹤0.01% |
+27,100
| New | +$1.12M |
|
2397
Rayonier
RYN
$6.64B
| $1.12M | ﹤0.01% |
54,085
+39,130
| +262% | +$862K |
|
2398
PUT
United Microelectronic
UMC
$43.6B
| $1.11M | ﹤0.01% |
+124,100
| New | +$1.21M |
|
2399
CALL
Materion
MTRN
$4.36B
| $1.11M | ﹤0.01% |
7,700
+7,100
| +1,183% | +$1.03M |
|
2400
PUT
Synaptics
SYNA
$4.33B
| $1.11M | ﹤0.01% |
15,900
-9,300
| -37% | -$755K |
|
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.