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 | |
|---|---|---|---|---|---|---|
1676
CALL
Illumina
ILMN
$29.4B
| $2.42M | ﹤0.01% |
19,600
-25,900
| -57% | -$3.4M |
|
1677
Peloton Interactive
PTON
$2.63B
| $2.41M | ﹤0.01% |
562,779
+467,871
| +493% | +$2.28M |
|
1678
PUT
Dutch Bros
BROS
$8.78B
| $2.41M | ﹤0.01% |
47,600
-900
| -2% | -$49.2K |
|
1679
PUT
Tetra Tech
TTEK
$8.23B
| $2.41M | ﹤0.01% |
80,000
+79,200
| +9,900% | +$2.8M |
|
1680
CALL
Polestar Automotive Holding UK
PSNY
$1.98B
| $2.41M | ﹤0.01% |
130,600
-35,500
| -21% | -$643K |
|
|
QLTB
1681
PUT
DELISTED
ISHARES BAA BA RATED CORP BOND FUND
QLTB
| $2.4M | ﹤0.01% |
11,000
-7,700
| -41% | -$1.68M |
|
1682
PUT
Copart
CPRT
$25.9B
| $2.39M | ﹤0.01% |
72,100
+23,500
| +48% | +$883K |
|
1683
Trip.com Group
TCOM
$27.5B
| $2.39M | ﹤0.01% |
48,072
+38,804
| +419% | +$2.26M |
|
1684
Symbotic
SYM
$5.11B
| $2.39M | ﹤0.01% |
44,932
-4,675
| -9% | -$268K |
|
1685
CALL
FIVE9
FIVN
$1.77B
| $2.39M | ﹤0.01% |
157,500
+42,300
| +37% | +$735K |
|
1686
PUT
Invitation Homes
INVH
$17.7B
| $2.39M | ﹤0.01% |
96,100
+56,600
| +143% | +$1.48M |
|
1687
CALL
Oshkosh
OSK
$9.67B
| $2.38M | ﹤0.01% |
16,200
+15,200
| +1,520% | +$2.37M |
|
1688
FedEx
FDX
$74.5B
| $2.36M | ﹤0.01% |
6,624
-30,137
| -82% | -$10.5M |
|
1689
PUT
Crescent Energy
CRGY
$3.72B
| $2.36M | ﹤0.01% |
174,700
-115,100
| -40% | -$1.21M |
|
1690
PUT
Contango Silver & Gold Inc
CTGO
$529M
| $2.35M | ﹤0.01% |
125,400
+122,200
| +3,819% | +$3.22M |
|
1691
CALL
SK Telecom
SKM
$13.7B
| $2.35M | ﹤0.01% |
80,100
+80,000
| +80,000% | +$2.21M |
|
|
QLTB
1692
CALL
DELISTED
ISHARES BAA BA RATED CORP BOND FUND
QLTB
| $2.34M | ﹤0.01% |
12,600
+1,100
| +10% | +$205K |
|
1693
Ametek
AME
$55.5B
| $2.34M | ﹤0.01% |
10,908
+5,964
| +121% | +$1.33M |
|
1694
PUT
Molson Coors Class B
TAP
$7.68B
| $2.34M | ﹤0.01% |
54,300
+25,700
| +90% | +$1.22M |
|
1695
AngloGold Ashanti
AU
$40.3B
| $2.33M | ﹤0.01% |
+23,983
| New | +$2.46M |
|
1696
PUT
Xylem
XYL
$28.5B
| $2.33M | ﹤0.01% |
19,500
+14,900
| +324% | +$1.95M |
|
1697
CALL
Digital Realty Trust
DLR
$73.7B
| $2.32M | ﹤0.01% |
12,900
-7,700
| -37% | -$1.32M |
|
1698
CALL
Nektar Therapeutics
NKTR
$2.39B
| $2.32M | ﹤0.01% |
32,300
-30,400
| -48% | -$1.73M |
|
1699
CALL
Pagaya Technologies
PGY
$1.32B
| $2.32M | ﹤0.01% |
199,200
-212,400
| -52% | -$3.36M |
|
1700
CALL
Northrop Grumman
NOC
$77B
| $2.32M | ﹤0.01% |
3,400
-10,100
| -75% | -$6.98M |
|
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.