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 | |
|---|---|---|---|---|---|---|
1701
CALL
FIGS
FIGS
$1.59B
| $2.32M | ﹤0.01% |
157,000
+49,700
| +46% | +$637K |
|
1702
PUT
Chubb
CB
$140B
| $2.31M | ﹤0.01% |
7,100
-3,100
| -30% | -$995K |
|
1703
Realty Income
O
$61.2B
| $2.31M | ﹤0.01% |
+37,812
| New | +$2.37M |
|
1704
Air Products & Chemicals
APD
$66.3B
| $2.31M | ﹤0.01% |
7,958
+3,394
| +74% | +$936K |
|
1705
CALL
Mondelez International
MDLZ
$77.7B
| $2.31M | ﹤0.01% |
40,100
-59,100
| -60% | -$3.42M |
|
1706
PUT
Blue Owl Capital
OBDC
$5.35B
| $2.31M | ﹤0.01% |
+208,900
| New | +$2.45M |
|
1707
AB InBev
BUD
$158B
| $2.31M | ﹤0.01% |
+33,295
| New | +$2.4M |
|
1708
CALL
APi Group
APG
$17.1B
| $2.31M | ﹤0.01% |
56,900
+39,500
| +227% | +$1.67M |
|
1709
PUT
HEICO Corp Class A
HEI.A
$35.4B
| $2.3M | ﹤0.01% |
8,400
+8,300
| +8,300% | +$2.04M |
|
1710
PUT
ZTO Express
ZTO
$18.2B
| $2.3M | ﹤0.01% |
91,500
+10,000
| +12% | +$234K |
|
1711
PUT
MGM Resorts International
MGM
$11.7B
| $2.3M | ﹤0.01% |
62,100
-114,700
| -65% | -$4.09M |
|
1712
CALL
BioCryst Pharmaceuticals
BCRX
$2.37B
| $2.29M | ﹤0.01% |
+240,900
| New | +$1.87M |
|
1713
CALL
Packaging Corp of America
PKG
$22.7B
| $2.29M | ﹤0.01% |
10,800
+10,000
| +1,250% | +$2.23M |
|
1714
CALL
Aon
AON
$77.3B
| $2.29M | ﹤0.01% |
7,100
+4,900
| +223% | +$1.63M |
|
|
CTRA
1715
CALL
DELISTED
Coterra Energy
CTRA
| $2.29M | ﹤0.01% |
65,200
-259,700
| -80% | -$7.81M |
|
1716
PUT
Sprott Uranium Miners ETF
URNM
$1.78B
| $2.29M | ﹤0.01% |
37,400
-137,300
| -79% | -$9.38M |
|
|
TE
1717
CALL
T1 Energy
TE
$1.4B
| $2.29M | ﹤0.01% |
520,900
+10,600
| +2% | +$77.7K |
|
1718
CALL
Mirion Technologies
MIR
$4.05B
| $2.29M | ﹤0.01% |
123,000
-21,000
| -15% | -$474K |
|
|
GRMN
1719
CALL
Garmin
GRMN
$46.9B
| $2.27M | ﹤0.01% |
9,800
+2,600
| +36% | +$582K |
|
1720
PUT
Franco-Nevada
FNV
$41.4B
| $2.27M | ﹤0.01% |
9,200
+4,900
| +114% | +$1.21M |
|
1721
PACS Group
PACS
$7.42B
| $2.27M | ﹤0.01% |
+70,720
| New | +$2.6M |
|
1722
PUT
Sphere Entertainment
SPHR
$4.88B
| $2.27M | ﹤0.01% |
19,300
-12,500
| -39% | -$1.31M |
|
1723
Caesars Entertainment
CZR
$6.1B
| $2.26M | ﹤0.01% |
+85,659
| New | +$2.04M |
|
1724
Mobileye
MBLY
$2.03B
| $2.26M | ﹤0.01% |
329,323
+261,711
| +387% | +$2.37M |
|
1725
CALL
Telus
TU
$16B
| $2.26M | ﹤0.01% |
176,300
+149,600
| +560% | +$2.03M |
|
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.