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 | |
|---|---|---|---|---|---|---|
4426
PUT
Daktronics
DAKT
$946M
| $180K | ﹤0.01% |
9,200
+8,900
| +2,967% | +$203K |
|
4427
CBIZ
CBZ
$2.95B
| $180K | ﹤0.01% |
6,687
+6,334
| +1,794% | +$223K |
|
4428
CALL
iShares Core Dividend ETF
DIVB
$1.71B
| $179K | ﹤0.01% |
3,900
-400
| -9% | -$22K |
|
4429
PUT
Vital Farms
VITL
$586M
| $179K | ﹤0.01% |
12,700
-5,200
| -29% | -$123K |
|
4430
PUT
Invesco CurrencyShares British Pound Sterling Trust
FXB
$77.1M
| $178K | ﹤0.01% |
1,400
+600
| +75% | +$77.8K |
|
4431
PUT
United Bankshares
UBSI
$6.69B
| $178K | ﹤0.01% |
+4,300
| New | +$179K |
|
4432
Milestone Pharmaceuticals
MIST
$129M
| $178K | ﹤0.01% |
+149,291
| New | +$261K |
|
4433
Geron
GERN
$898M
| $177K | ﹤0.01% |
119,000
+84,401
| +244% | +$128K |
|
|
ABX
4434
PUT
Abacus Global Management
ABX
$988M
| $177K | ﹤0.01% |
22,500
+14,500
| +181% | +$126K |
|
4435
Perspective Therapeutics
CATX
$327M
| $177K | ﹤0.01% |
+42,486
| New | +$179K |
|
4436
PUT
Kennametal
KMT
$2.56B
| $177K | ﹤0.01% |
+4,900
| New | +$179K |
|
|
ALMS
4437
Alumis Inc
ALMS
$3.36B
| $177K | ﹤0.01% |
+8,030
| New | +$201K |
|
4438
CALL
BBB Foods
TBBB
$4.76B
| $177K | ﹤0.01% |
5,000
+500
| +11% | +$17.5K |
|
4439
abrdn Physical Gold Shares ETF
SGOL
$6.9B
| $177K | ﹤0.01% |
+3,963
| New | +$184K |
|
4440
CALL
Sprott Junior Gold Miners ETF
SGDJ
$268M
| $177K | ﹤0.01% |
2,100
+1,500
| +250% | +$145K |
|
|
CONI
4441
GraniteShares 2x Short COIN Daily ETF
CONI
$11.4M
| $176K | ﹤0.01% |
2,866
-625
| -18% | -$44.6K |
|
4442
FormFactor
FORM
$6.51B
| $176K | ﹤0.01% |
+1,817
| New | +$156K |
|
4443
PUT
Trimble
TRMB
$13.6B
| $176K | ﹤0.01% |
2,700
| – | – |
|
4444
PUT
Alight
ALIT
$534M
| $176K | ﹤0.01% |
15,095
-40
| -0.3% | -$953 |
|
4445
PUT
First Commonwealth Financial
FCF
$2.22B
| $176K | ﹤0.01% |
+10,000
| New | +$176K |
|
4446
CALL
NRX Pharmaceuticals
NRXP
$138M
| $176K | ﹤0.01% |
82,400
-21,800
| -21% | -$44K |
|
4447
PUT
Immuneering
IMRX
$262M
| $175K | ﹤0.01% |
33,300
+23,000
| +223% | +$118K |
|
4448
FreightCar America
RAIL
$263M
| $175K | ﹤0.01% |
22,018
+10,021
| +84% | +$114K |
|
4449
TransAlta
TAC
$3.93B
| $175K | ﹤0.01% |
13,392
+3,845
| +40% | +$49.5K |
|
|
TXNM
4450
PUT
TXNM Energy Inc
TXNM
$6.39B
| $175K | ﹤0.01% |
3,000
-1,400
| -32% | -$82.5K |
|
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.