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 | |
|---|---|---|---|---|---|---|
1751
PUT
Sysco
SYY
$39.7B
| $2.19M | ﹤0.01% |
30,700
+18,400
| +150% | +$1.52M |
|
|
XYZ
1752
Block Inc
XYZ
$45.9B
| $2.19M | ﹤0.01% |
+36,374
| New | +$2.21M |
|
1753
CALL
Neogen
NEOG
$2.05B
| $2.19M | ﹤0.01% |
235,300
-93,100
| -28% | -$916K |
|
|
Q
1754
CALL
Qnity Electronics Inc
Q
$28.3B
| $2.18M | ﹤0.01% |
18,900
+6,200
| +49% | +$658K |
|
1755
PUT
Plug Power
PLUG
$2.92B
| $2.18M | ﹤0.01% |
964,800
-678,400
| -41% | -$1.47M |
|
|
UNIT
1756
Uniti Group
UNIT
$2.63B
| $2.18M | ﹤0.01% |
231,966
-60,785
| -21% | -$477K |
|
1757
PUT
Keysight
KEYS
$54.5B
| $2.17M | ﹤0.01% |
7,700
+6,700
| +670% | +$1.68M |
|
|
GTLS
1758
CALL
DELISTED
Chart Industries
GTLS
| $2.17M | ﹤0.01% |
10,500
-100
| -0.9% | -$20.7K |
|
1759
CALL
Birkenstock
BIRK
$7.47B
| $2.15M | ﹤0.01% |
60,100
+16,500
| +38% | +$643K |
|
1760
PUT
Galicia Financial Group
GGAL
$7.92B
| $2.15M | ﹤0.01% |
+46,100
| New | +$2.24M |
|
1761
PUT
Zillow
Z
$7.04B
| $2.15M | ﹤0.01% |
52,000
-83,900
| -62% | -$4.46M |
|
1762
CALL
Otis Worldwide
OTIS
$27.4B
| $2.15M | ﹤0.01% |
27,900
+20,900
| +299% | +$1.83M |
|
1763
CALL
Warner Music
WMG
$13.8B
| $2.15M | ﹤0.01% |
84,100
+12,000
| +17% | +$340K |
|
1764
PUT
BorgWarner
BWA
$13.2B
| $2.14M | ﹤0.01% |
39,500
+5,300
| +15% | +$279K |
|
|
KLAR
1765
PUT
Klarna Group
KLAR
$6.56B
| $2.14M | ﹤0.01% |
163,400
+55,800
| +52% | +$1.1M |
|
1766
PUT
Qiagen
QGEN
$8.53B
| $2.13M | ﹤0.01% |
53,200
-15,000
| -22% | -$710K |
|
1767
Liberty Energy
LBRT
$2.83B
| $2.13M | ﹤0.01% |
73,956
+16,413
| +29% | +$418K |
|
1768
CALL
UWM Holdings
UWMC
$621M
| $2.13M | ﹤0.01% |
588,300
+282,900
| +93% | +$1.3M |
|
1769
CALL
Fluence Energy
FLNC
$1.78B
| $2.12M | ﹤0.01% |
154,400
-96,100
| -38% | -$1.93M |
|
1770
PUT
KE Holdings
BEKE
$16.8B
| $2.12M | ﹤0.01% |
141,800
-13,500
| -9% | -$232K |
|
|
JBTM
1771
CALL
JBT Marel
JBTM
$7.14B
| $2.12M | ﹤0.01% |
16,600
-5,900
| -26% | -$892K |
|
1772
Akamai
AKAM
$16.8B
| $2.11M | ﹤0.01% |
18,403
-32,073
| -64% | -$3.22M |
|
1773
CALL
Infosys
INFY
$45B
| $2.11M | ﹤0.01% |
156,200
-34,100
| -18% | -$534K |
|
1774
PUT
Enovix
ENVX
$862M
| $2.11M | ﹤0.01% |
406,900
+66,900
| +20% | +$419K |
|
1775
CALL
Quantum Computing Inc
QUBT
$1.68B
| $2.1M | ﹤0.01% |
306,900
-159,100
| -34% | -$1.45M |
|
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.