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 | |
|---|---|---|---|---|---|---|
3426
PUT
Triple Flag Precious Metals
TFPM
$6.12B
| $437K | ﹤0.01% |
12,600
+3,000
| +31% | +$109K |
|
3427
CALL
Atossa Therapeutics
ATOS
$21.8M
| $437K | ﹤0.01% |
83,100
+77,280
| +1,328% | +$489K |
|
3428
PUT
Sociedad Química y Minera de Chile
SQM
$19.5B
| $437K | ﹤0.01% |
+5,400
| New | +$411K |
|
3429
Illinois Tool Works
ITW
$81.6B
| $437K | ﹤0.01% |
+1,679
| New | +$457K |
|
3430
CALL
SFL Corp
SFL
$1.64B
| $437K | ﹤0.01% |
+40,500
| New | +$392K |
|
|
GOLD
3431
CALL
Gold.com Inc
GOLD
$1.22B
| $437K | ﹤0.01% |
10,900
+1,700
| +18% | +$83.1K |
|
3432
CALL
Casey's General Stores
CASY
$32.1B
| $437K | ﹤0.01% |
600
-1,500
| -71% | -$977K |
|
3433
PUT
W.W. Grainger
GWW
$64B
| $436K | ﹤0.01% |
+400
| New | +$437K |
|
3434
CALL
Commercial Metals
CMC
$7.57B
| $436K | ﹤0.01% |
7,100
+4,400
| +163% | +$318K |
|
3435
CALL
Orion
OEC
$381M
| $436K | ﹤0.01% |
67,100
-6,300
| -9% | -$37.3K |
|
3436
PUT
CDW
CDW
$18.6B
| $436K | ﹤0.01% |
+3,600
| New | +$455K |
|
3437
Lionsgate Studios
LION
$3.98B
| $436K | ﹤0.01% |
45,426
-125,602
| -73% | -$1.16M |
|
3438
CALL
Liberty Energy
LBRT
$2.93B
| $435K | ﹤0.01% |
15,100
-20,100
| -57% | -$512K |
|
3439
PUT
Western Union
WU
$2.4B
| $435K | ﹤0.01% |
49,800
-167,500
| -77% | -$1.59M |
|
3440
CALL
KULR Technology Group
KULR
$120M
| $435K | ﹤0.01% |
183,400
-146,900
| -44% | -$456K |
|
3441
PUT
AllianceBernstein
AB
$3.43B
| $434K | ﹤0.01% |
11,600
+2,600
| +29% | +$102K |
|
3442
CALL
NGL Energy Partners
NGL
$2.01B
| $434K | ﹤0.01% |
35,200
-85,200
| -71% | -$968K |
|
3443
PUT
Structure Therapeutics
GPCR
$3.52B
| $434K | ﹤0.01% |
9,000
+1,400
| +18% | +$95.8K |
|
3444
JPMorgan Equity Premium Income ETF
JEPI
$45.7B
| $434K | ﹤0.01% |
+7,652
| New | +$445K |
|
|
UNIT
3445
CALL
Uniti Group
UNIT
$2.26B
| $432K | ﹤0.01% |
46,100
-62,900
| -58% | -$493K |
|
3446
Floor & Decor
FND
$5.98B
| $432K | ﹤0.01% |
+8,510
| New | +$554K |
|
3447
CALL
Graco
GGG
$13B
| $432K | ﹤0.01% |
5,100
| – | – |
|
3448
PUT
Omeros
OMER
$863M
| $431K | ﹤0.01% |
40,800
-78,900
| -66% | -$930K |
|
3449
CALL
Woodward
WWD
$21.2B
| $430K | ﹤0.01% |
1,200
-12,700
| -91% | -$4.57M |
|
3450
CALL
Equillium
EQ
$147M
| $429K | ﹤0.01% |
214,500
+179,000
| +504% | +$295K |
|
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.