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 | |
|---|---|---|---|---|---|---|
1476
CALL
BWX Technologies
BWXT
$16B
| $3.09M | ﹤0.01% |
15,100
-600
| -4% | -$122K |
|
1477
PUT
GlobalFoundries
GFS
$29.4B
| $3.09M | ﹤0.01% |
69,400
+12,900
| +23% | +$569K |
|
1478
CALL
Cardinal Health
CAH
$53.4B
| $3.09M | ﹤0.01% |
14,600
-600
| -4% | -$129K |
|
1479
BridgeBio Pharma
BBIO
$16.5B
| $3.08M | ﹤0.01% |
41,434
+23,022
| +125% | +$1.67M |
|
1480
PUT
Liquidia Corp
LQDA
$7.67B
| $3.08M | ﹤0.01% |
81,500
+58,200
| +250% | +$2.16M |
|
1481
Duolingo
DUOL
$5.7B
| $3.08M | ﹤0.01% |
+31,200
| New | +$3.85M |
|
1482
PUT
Lithia Motors
LAD
$7.78B
| $3.07M | ﹤0.01% |
12,300
+12,200
| +12,200% | +$3.62M |
|
|
HSAI
1483
CALL
Hesai Group
HSAI
$2.29B
| $3.07M | ﹤0.01% |
160,500
+51,000
| +47% | +$1.29M |
|
1484
PUT
Restaurant Brands International
QSR
$25.1B
| $3.07M | ﹤0.01% |
41,500
+16,100
| +63% | +$1.13M |
|
1485
CALL
Penske Automotive Group
PAG
$14.3B
| $3.07M | ﹤0.01% |
20,500
+20,300
| +10,150% | +$3.21M |
|
1486
BellRing Brands
BRBR
$1.51B
| $3.06M | ﹤0.01% |
+190,436
| New | +$3.86M |
|
1487
CALL
Insmed
INSM
$23.2B
| $3.06M | ﹤0.01% |
18,700
-109,400
| -85% | -$16.8M |
|
1488
CALL
Par Pacific Holdings
PARR
$3.88B
| $3.05M | ﹤0.01% |
48,700
+3,800
| +8% | +$170K |
|
1489
CALL
Globalstar
GSAT
$10.2B
| $3.05M | ﹤0.01% |
45,900
-947,100
| -95% | -$57.8M |
|
1490
Adobe
ADBE
$89.5B
| $3.05M | ﹤0.01% |
12,528
+10,593
| +547% | +$2.93M |
|
1491
CALL
Evolv Technologies
EVLV
$943M
| $3.04M | ﹤0.01% |
+502,100
| New | +$2.94M |
|
1492
PUT
Oneok
OKE
$58.7B
| $3.04M | ﹤0.01% |
33,600
-20,400
| -38% | -$1.68M |
|
1493
Applovin
APP
$132B
| $3.03M | ﹤0.01% |
+7,614
| New | +$3.68M |
|
1494
CALL
Axsome Therapeutics
AXSM
$12.4B
| $3.03M | ﹤0.01% |
17,900
+2,500
| +16% | +$432K |
|
1495
CALL
Stellantis
STLA
$16.5B
| $3.02M | ﹤0.01% |
426,400
-146,800
| -26% | -$1.23M |
|
1496
iShares MSCI South Korea ETF
EWY
$21.7B
| $3.02M | ﹤0.01% |
+24,562
| New | +$3.07M |
|
1497
CALL
Kosmos Energy
KOS
$1.56B
| $3.02M | ﹤0.01% |
1,086,400
+440,500
| +68% | +$828K |
|
1498
CALL
Vanguard FTSE Europe ETF
VGK
$30B
| $3.02M | ﹤0.01% |
+46,100
| New | +$3.96M |
|
1499
PUT
Capricor Therapeutics
CAPR
$1.14B
| $3.02M | ﹤0.01% |
99,300
+31,400
| +46% | +$837K |
|
1500
CALL
Travere Therapeutics
TVTX
$5.33B
| $3.02M | ﹤0.01% |
101,600
-101,600
| -50% | -$3.04M |
|
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.