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 | |
|---|---|---|---|---|---|---|
7376
CALL
ArcBest
ARCB
$3.52B
| $9.84K | ﹤0.01% |
100
-100
| -50% | -$9.48K |
|
7377
PUT
Lexicon Pharmaceuticals
LXRX
$1.03B
| $9.83K | ﹤0.01% |
6,300
+1,700
| +37% | +$2.47K |
|
7378
PUT
PDF Solutions
PDFS
$2.05B
| $9.81K | ﹤0.01% |
300
-400
| -57% | -$13.1K |
|
7379
CALL
Avanos Medical
AVNS
$1.17B
| $9.81K | ﹤0.01% |
700
-700
| -50% | -$9.43K |
|
7380
First Trust Water ETF
FIW
$1.81B
| $9.8K | ﹤0.01% |
95
-318
| -77% | -$35.2K |
|
7381
CALL
Janus International
JBI
$719M
| $9.79K | ﹤0.01% |
+1,900
| New | +$12.3K |
|
|
SILA
7382
DELISTED
Sila Realty Trust
SILA
| $9.78K | ﹤0.01% |
413
-226
| -35% | -$5.54K |
|
|
LADR
7383
PUT
Ladder Capital
LADR
$1.26B
| $9.77K | ﹤0.01% |
1,000
+900
| +900% | +$9.46K |
|
7384
CALL
Ovid Therapeutics
OVID
$430M
| $9.77K | ﹤0.01% |
4,400
-46,500
| -91% | -$83.1K |
|
7385
PUT
Hyster-Yale Materials Handling
HY
$569M
| $9.75K | ﹤0.01% |
300
-400
| -57% | -$13.7K |
|
|
TOKE
7386
DELISTED
Cambria Cannabis ETF
TOKE
| $9.75K | ﹤0.01% |
+1,908
| New | +$10.9K |
|
7387
CION Investment
CION
$307M
| $9.75K | ﹤0.01% |
1,425
+1,113
| +357% | +$9.35K |
|
|
OLP
7388
One Liberty Properties
OLP
$547M
| $9.74K | ﹤0.01% |
454
-16
| -3% | -$355 |
|
7389
Loews
L
$23.6B
| $9.71K | ﹤0.01% |
+91
| New | +$9.74K |
|
7390
Pacer US Cash Cows 100 ETF
COWZ
$18.2B
| $9.7K | ﹤0.01% |
155
-384
| -71% | -$24.1K |
|
7391
Dimensional US Large Cap Value ETF
DFLV
$6.62B
| $9.68K | ﹤0.01% |
271
+255
| +1,594% | +$9.19K |
|
7392
CALL
Regional Management Corp
RM
$383M
| $9.68K | ﹤0.01% |
+300
| New | +$10.4K |
|
7393
PUT
NeoGenomics
NEO
$1.85B
| $9.65K | ﹤0.01% |
1,300
+1,100
| +550% | +$11.6K |
|
7394
PUT
La-Z-Boy
LZB
$1.6B
| $9.64K | ﹤0.01% |
300
-700
| -70% | -$25.3K |
|
|
NSLR
7395
PUT
Neostellar Capital Corp
NSLR
$285M
| $9.64K | ﹤0.01% |
900
| – | – |
|
7396
CALL
Kiniksa Pharmaceuticals
KNSA
$4.89B
| $9.63K | ﹤0.01% |
+200
| New | +$8.86K |
|
7397
CALL
BARK
BARK
$82M
| $9.63K | ﹤0.01% |
950
+90
| +10% | +$1.38K |
|
7398
CALL
Stevanato
STVN
$5.23B
| $9.63K | ﹤0.01% |
+700
| New | +$11.6K |
|
7399
CALL
Outset Medical
OM
$75.3M
| $9.6K | ﹤0.01% |
2,500
+1,000
| +67% | +$4.1K |
|
|
IVSS
7400
PUT
Applied Finance IVS US SMID ETF
IVSS
$26.7M
| $9.59K | ﹤0.01% |
+1,800
| New | +$47.8K |
|
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.