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 | |
|---|---|---|---|---|---|---|
7451
PUT
Acadia Pharmaceuticals
ACAD
$4.35B
| $8.9K | ﹤0.01% |
400
-10,000
| -96% | -$239K |
|
7452
CALL
ACV Auctions
ACVA
$1.29B
| $8.9K | ﹤0.01% |
2,100
-40,100
| -95% | -$263K |
|
7453
CALL
Inseego
INSG
$122M
| $8.9K | ﹤0.01% |
800
+600
| +300% | +$6.75K |
|
|
CGAU
7454
PUT
Centerra Gold
CGAU
$3.02B
| $8.89K | ﹤0.01% |
500
-500
| -50% | -$8.89K |
|
7455
CALL
CuriosityStream
CURI
$152M
| $8.88K | ﹤0.01% |
3,000
-200
| -6% | -$675 |
|
7456
CALL
Walker & Dunlop
WD
$1.66B
| $8.88K | ﹤0.01% |
+200
| New | +$11.3K |
|
7457
CALL
Oric Pharmaceuticals
ORIC
$1.12B
| $8.87K | ﹤0.01% |
700
+300
| +75% | +$3.41K |
|
7458
CALL
Frequency Electronics
FEIM
$657M
| $8.85K | ﹤0.01% |
+200
| New | +$10.2K |
|
7459
Jack Henry & Associates
JKHY
$10.9B
| $8.85K | ﹤0.01% |
+56
| New | +$9.59K |
|
|
NVA
7460
PUT
Nova Minerals Corp
NVA
$163M
| $8.8K | ﹤0.01% |
+1,500
| New | +$11.2K |
|
7461
CAE Inc
CAE
$7.9B
| $8.8K | ﹤0.01% |
338
-304
| -47% | -$9.2K |
|
|
CIM
7462
PUT
Chimera Investment
CIM
$1.06B
| $8.79K | ﹤0.01% |
700
-7,500
| -91% | -$97.8K |
|
|
SLSR
7463
Solaris Resources
SLSR
$1.19B
| $8.79K | ﹤0.01% |
1,024
-4,482
| -81% | -$41.3K |
|
7464
CALL
Revvity
RVTY
$12.3B
| $8.76K | ﹤0.01% |
100
-5,300
| -98% | -$525K |
|
|
7465
PUT
Revvity
RVTY
$12.3B
| $8.76K | ﹤0.01% |
100
-3,100
| -97% | -$307K |
|
7466
Tidal Trust II Defiance Nasdaq 100 Weekly Distribution ETF
QQQY
$186M
| $8.72K | ﹤0.01% |
422
+19
| +5% | +$426 |
|
7467
Lear
LEA
$7.15B
| $8.72K | ﹤0.01% |
+72
| New | +$8.98K |
|
7468
CALL
NCR Atleos
NATL
$3.48B
| $8.72K | ﹤0.01% |
200
-6,200
| -97% | -$256K |
|
7469
PUT
Pentair
PNR
$10B
| $8.71K | ﹤0.01% |
100
-1,700
| -94% | -$167K |
|
|
NIQ
7470
NIQ Global Intelligence PLC
NIQ
$3.17B
| $8.71K | ﹤0.01% |
+766
| New | +$10.3K |
|
7471
CALL
Conduent
CNDT
$248M
| $8.7K | ﹤0.01% |
6,800
-2,600
| -28% | -$3.96K |
|
7472
PUT
Rush Street Interactive
RSI
$3.55B
| $8.7K | ﹤0.01% |
400
-900
| -69% | -$17.2K |
|
|
CLSX
7473
Tradr 2X Long CLSK Daily ETF
CLSX
$33M
| $8.66K | ﹤0.01% |
+1,024
| New | +$16.4K |
|
|
NOAH
7474
Noah Holdings
NOAH
$609M
| $8.66K | ﹤0.01% |
875
+860
| +5,733% | +$9.87K |
|
7475
PUT
MeiraGTx Holdings
MGTX
$1.13B
| $8.66K | ﹤0.01% |
1,000
| – | – |
|
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.