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 | |
|---|---|---|---|---|---|---|
4901
Spire Global
SPIR
$425M
| $117K | ﹤0.01% |
9,314
-15,731
| -63% | -$168K |
|
4902
CALL
AutoNation
AN
$6.97B
| $117K | ﹤0.01% |
600
+300
| +100% | +$60.6K |
|
|
DQ
4903
PUT
Daqo New Energy
DQ
$790M
| $117K | ﹤0.01% |
5,500
-13,600
| -71% | -$331K |
|
4904
CALL
Ameris Bancorp
ABCB
$5.89B
| $117K | ﹤0.01% |
1,500
-400
| -21% | -$31.8K |
|
4905
Quest Diagnostics
DGX
$25.1B
| $117K | ﹤0.01% |
596
-4,362
| -88% | -$847K |
|
4906
PUT
Prospect Capital
PSEC
$1.06B
| $117K | ﹤0.01% |
44,700
-27,100
| -38% | -$74.2K |
|
4907
CALL
Procure Space ETF
UFO
$620M
| $117K | ﹤0.01% |
2,600
+1,900
| +271% | +$85.4K |
|
4908
CALL
Helios Technologies
HLIO
$2.64B
| $116K | ﹤0.01% |
1,800
+300
| +20% | +$20.1K |
|
4909
CALL
Neumora Therapeutics
NMRA
$276M
| $116K | ﹤0.01% |
59,700
+34,500
| +137% | +$89.4K |
|
4910
PUT
ODDITY Tech
ODD
$708M
| $116K | ﹤0.01% |
8,700
+4,200
| +93% | +$105K |
|
4911
CALL
Taysha Gene Therapies
TSHA
$1.59B
| $116K | ﹤0.01% |
26,000
+1,800
| +7% | +$8.37K |
|
4912
Open Text
OTEX
$5.43B
| $116K | ﹤0.01% |
+5,224
| New | +$136K |
|
4913
Sprott Gold Miners ETF
SGDM
$551M
| $116K | ﹤0.01% |
1,537
+1,502
| +4,291% | +$121K |
|
4914
PUT
Trinity Industries
TRN
$2.97B
| $116K | ﹤0.01% |
3,600
+1,800
| +100% | +$55.2K |
|
4915
PUT
ABM Industries
ABM
$2.8B
| $116K | ﹤0.01% |
3,000
+1,700
| +131% | +$73.5K |
|
4916
CALL
Sky Harbour Group
SKYH
$351M
| $116K | ﹤0.01% |
+12,000
| New | +$111K |
|
4917
PUT
Perspective Therapeutics
CATX
$332M
| $116K | ﹤0.01% |
+27,700
| New | +$117K |
|
4918
Avantor
AVTR
$7.81B
| $115K | ﹤0.01% |
14,727
+5,636
| +62% | +$55.5K |
|
4919
CALL
Xeris Biopharma Holdings
XERS
$1.44B
| $115K | ﹤0.01% |
+19,900
| New | +$132K |
|
4920
SandRidge Energy
SD
$510M
| $115K | ﹤0.01% |
7,066
-6,108
| -46% | -$98.9K |
|
4921
PUT
NewAmsterdam Pharma
NAMS
$3.47B
| $115K | ﹤0.01% |
3,600
-13,500
| -79% | -$440K |
|
4922
PUT
Neogen
NEOG
$2.05B
| $115K | ﹤0.01% |
12,400
+2,400
| +24% | +$23.6K |
|
4923
CALL
Philips
PHG
$25.4B
| $115K | ﹤0.01% |
4,356
-2,800
| -39% | -$79.2K |
|
4924
CALL
Hyatt Hotels
H
$17.6B
| $115K | ﹤0.01% |
800
-1,400
| -64% | -$222K |
|
4925
PUT
Immix Biopharma
IMMX
$607M
| $115K | ﹤0.01% |
12,600
-17,700
| -58% | -$130K |
|
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.