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 | |
|---|---|---|---|---|---|---|
7526
CALL
DHI Group
DHX
$175M
| $8.15K | ﹤0.01% |
+2,900
| New | +$6.42K |
|
|
STKL
7527
DELISTED
SunOpta
STKL
| $8.14K | ﹤0.01% |
1,256
-1,300
| -51% | -$7.35K |
|
7528
CALL
Brady Corp
BRC
$4.4B
| $8.12K | ﹤0.01% |
+100
| New | +$8.7K |
|
7529
PUT
Wyndham Hotels & Resorts
WH
$5.67B
| $8.12K | ﹤0.01% |
+100
| New | +$7.84K |
|
7530
Aspen Aerogels
ASPN
$417M
| $8.12K | ﹤0.01% |
2,374
-2,458
| -51% | -$8.29K |
|
7531
CALL
Apyx Medical
APYX
$171M
| $8.12K | ﹤0.01% |
2,200
+1,800
| +450% | +$6.73K |
|
7532
SI-BONE Inc
SIBN
$759M
| $8.11K | ﹤0.01% |
642
-6,255
| -91% | -$97.9K |
|
|
IRS
7533
PUT
IRSA Inversiones y Representaciones
IRS
$1.28B
| $8.11K | ﹤0.01% |
500
-100
| -17% | -$1.59K |
|
7534
PUT
OFG Bancorp
OFG
$2.11B
| $8.09K | ﹤0.01% |
+200
| New | +$8.1K |
|
7535
PUT
National Health Investors
NHI
$3.84B
| $8.09K | ﹤0.01% |
100
-5,600
| -98% | -$466K |
|
7536
PUT
Adient
ADNT
$1.56B
| $8.08K | ﹤0.01% |
400
-1,000
| -71% | -$22.2K |
|
7537
CALL
Harmonic Inc
HLIT
$1.35B
| $8.08K | ﹤0.01% |
+900
| New | +$8.94K |
|
7538
PUT
Gran Tierra Energy
GTE
$235M
| $8.07K | ﹤0.01% |
900
+700
| +350% | +$4.44K |
|
7539
PUT
StoneX
SNEX
$8.41B
| $8.06K | ﹤0.01% |
150
-75
| -33% | -$3.79K |
|
7540
iShares US Consumer Staples ETF
IYK
$1.38B
| $8.05K | ﹤0.01% |
115
-65
| -36% | -$4.67K |
|
|
DMC
7541
CALL
Del Monte Corp
DMC
$1.38B
| $8.05K | ﹤0.01% |
200
+100
| +100% | +$3.99K |
|
|
DMC
7542
PUT
Del Monte Corp
DMC
$1.38B
| $8.05K | ﹤0.01% |
200
+100
| +100% | +$3.99K |
|
|
MTLS
7543
Materialise
MTLS
$380M
| $8.05K | ﹤0.01% |
1,630
-14,985
| -90% | -$80.9K |
|
7544
PUT
Vera Therapeutics
VERA
$2.67B
| $8.04K | ﹤0.01% |
200
-1,400
| -88% | -$60.3K |
|
7545
ProShares UltraShort Financials
SKF
$10.5M
| $8.04K | ﹤0.01% |
261
-353
| -57% | -$9.96K |
|
|
NVDW
7546
Roundhill NVDA WeeklyPay ETF
NVDW
$111M
| $8.04K | ﹤0.01% |
+236
| New | +$9.09K |
|
7547
PUT
Orthofix Medical
OFIX
$467M
| $8.03K | ﹤0.01% |
700
-1,500
| -68% | -$19.8K |
|
7548
PUT
Lyell Immunopharma
LYEL
$317M
| $8.02K | ﹤0.01% |
400
-900
| -69% | -$21K |
|
7549
CALL
CS Disco
LAW
$264M
| $8.02K | ﹤0.01% |
2,100
| – | – |
|
7550
PUT
Ingersoll Rand
IR
$31.4B
| $8.01K | ﹤0.01% |
100
-3,800
| -97% | -$336K |
|
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.