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 | |
|---|---|---|---|---|---|---|
1626
CALL
Globus Medical
GMED
$10.4B
| $2.54M | ﹤0.01% |
29,500
+20,900
| +243% | +$1.88M |
|
1627
PUT
General Dynamics
GD
$105B
| $2.54M | ﹤0.01% |
7,400
-20,700
| -74% | -$7.34M |
|
1628
PUT
Viasat
VSAT
$9.79B
| $2.54M | ﹤0.01% |
55,400
-114,800
| -67% | -$5.16M |
|
1629
CALL
Sempra
SRE
$60.8B
| $2.54M | ﹤0.01% |
26,100
-10,600
| -29% | -$970K |
|
|
MPT
1630
Medical Properties Trust
MPT
$2.89B
| $2.53M | ﹤0.01% |
547,206
-23,279
| -4% | -$121K |
|
1631
Citigroup
C
$222B
| $2.53M | ﹤0.01% |
+22,325
| New | +$2.54M |
|
1632
Stellantis
STLA
$16.5B
| $2.53M | ﹤0.01% |
356,788
+21,646
| +6% | +$181K |
|
1633
CALL
Ametek
AME
$55.5B
| $2.53M | ﹤0.01% |
11,800
-7,500
| -39% | -$1.67M |
|
1634
Frontline
FRO
$8.75B
| $2.53M | ﹤0.01% |
+72,539
| New | +$2.22M |
|
|
SERV
1635
CALL
Serve Robotics
SERV
$409M
| $2.53M | ﹤0.01% |
299,600
-153,400
| -34% | -$1.66M |
|
|
CRCO
1636
PUT
YieldMax CRCL Option Income Strategy ETF
CRCO
$17.5M
| $2.53M | ﹤0.01% |
135,100
+123,500
| +1,065% | +$2.84M |
|
|
ETHW
1637
CALL
Bitwise Ethereum ETF
ETHW
$195M
| $2.52M | ﹤0.01% |
168,100
-42,100
| -20% | -$722K |
|
1638
PUT
Teladoc Health
TDOC
$1.58B
| $2.52M | ﹤0.01% |
462,000
-129,600
| -22% | -$727K |
|
1639
PUT
Monolithic Power Systems
MPWR
$65.5B
| $2.51M | ﹤0.01% |
2,300
-3,300
| -59% | -$3.61M |
|
1640
PUT
Cencora
COR
$60.3B
| $2.51M | ﹤0.01% |
8,000
-14,800
| -65% | -$5.17M |
|
1641
CALL
Keysight
KEYS
$54.5B
| $2.51M | ﹤0.01% |
8,900
+1,400
| +19% | +$351K |
|
1642
CALL
Canadian Imperial Bank of Commerce
CM
$107B
| $2.51M | ﹤0.01% |
+26,500
| New | +$2.53M |
|
1643
CALL
Onto Innovation
ONTO
$13.6B
| $2.5M | ﹤0.01% |
12,200
-2,400
| -16% | -$491K |
|
1644
PUT
Nextpower Inc
NXT
$15.2B
| $2.5M | ﹤0.01% |
20,700
-58,200
| -74% | -$6.45M |
|
1645
PUT
Ramaco Resources Class A
METC
$676M
| $2.49M | ﹤0.01% |
161,200
-16,600
| -9% | -$294K |
|
1646
TPG
TPG
$6.87B
| $2.49M | ﹤0.01% |
+61,422
| New | +$3.15M |
|
1647
Coherent
COHR
$55.2B
| $2.49M | ﹤0.01% |
10,444
-33,767
| -76% | -$7.73M |
|
1648
CALL
Warrior Met Coal
HCC
$4.23B
| $2.49M | ﹤0.01% |
26,700
+4,900
| +22% | +$441K |
|
|
CNH
1649
CALL
CNH Industrial
CNH
$13.8B
| $2.49M | ﹤0.01% |
226,000
+123,400
| +120% | +$1.39M |
|
1650
CALL
Herbalife
HLF
$1.23B
| $2.48M | ﹤0.01% |
168,700
-13,000
| -7% | -$212K |
|
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.