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 | |
|---|---|---|---|---|---|---|
3201
CALL
Solid Power
SLDP
$463M
| $524K | ﹤0.01% |
174,600
-27,000
| -13% | -$109K |
|
3202
PUT
Moody's
MCO
$83.5B
| $524K | ﹤0.01% |
1,200
-300
| -20% | -$142K |
|
|
EXK
3203
PUT
Endeavour Silver
EXK
$2.3B
| $522K | ﹤0.01% |
56,100
+2,900
| +5% | +$32.8K |
|
3204
CALL
Bloomin' Brands
BLMN
$759M
| $522K | ﹤0.01% |
96,700
+12,400
| +15% | +$79.4K |
|
3205
CALL
Patrick Industries
PATK
$2.79B
| $522K | ﹤0.01% |
+4,700
| New | +$581K |
|
|
NNE
3206
Nano Nuclear Energy
NNE
$896M
| $522K | ﹤0.01% |
+25,472
| New | +$695K |
|
3207
CALL
Kyndryl
KD
$2.98B
| $521K | ﹤0.01% |
39,700
+2,600
| +7% | +$45.8K |
|
|
NTSK
3208
CALL
Netskope Inc
NTSK
$4.89B
| $520K | ﹤0.01% |
61,300
-32,900
| -35% | -$408K |
|
|
CSGS
3209
CALL
DELISTED
CSG Systems International
CSGS
| $520K | ﹤0.01% |
+6,500
| New | +$518K |
|
3210
CALL
Academy Sports + Outdoors
ASO
$3B
| $519K | ﹤0.01% |
+9,200
| New | +$524K |
|
3211
CALL
PTC Therapeutics
PTCT
$6.26B
| $518K | ﹤0.01% |
7,600
+5,900
| +347% | +$418K |
|
3212
CALL
Trex
TREX
$4.56B
| $517K | ﹤0.01% |
14,200
+11,800
| +492% | +$475K |
|
3213
PUT
RELX
RELX
$63.9B
| $517K | ﹤0.01% |
15,600
+15,200
| +3,800% | +$534K |
|
3214
CALL
Biohaven
BHVN
$2.08B
| $517K | ﹤0.01% |
61,100
-65,400
| -52% | -$715K |
|
3215
CALL
Norfolk Southern
NSC
$75B
| $517K | ﹤0.01% |
1,800
-19,600
| -92% | -$5.83M |
|
3216
VanEck Pharmaceutical ETF
PPH
$970M
| $517K | ﹤0.01% |
4,973
+2,510
| +102% | +$267K |
|
3217
CALL
Sphere Entertainment
SPHR
$5.31B
| $517K | ﹤0.01% |
4,400
-20,500
| -82% | -$2.14M |
|
3218
Viatris
VTRS
$20.7B
| $516K | ﹤0.01% |
+38,221
| New | +$535K |
|
3219
CALL
Kingstone Companies
KINS
$293M
| $516K | ﹤0.01% |
35,400
-2,800
| -7% | -$44K |
|
3220
PUT
Array Technologies
ARRY
$781M
| $515K | ﹤0.01% |
71,200
-44,100
| -38% | -$408K |
|
3221
PUT
Alignment Healthcare
ALHC
$3.85B
| $515K | ﹤0.01% |
29,200
+28,600
| +4,767% | +$574K |
|
3222
PUT
Satellogic
SATL
$517M
| $514K | ﹤0.01% |
94,500
+68,200
| +259% | +$251K |
|
3223
PUT
Organon & Co
OGN
$3.56B
| $514K | ﹤0.01% |
85,800
-45,900
| -35% | -$345K |
|
3224
BioCryst Pharmaceuticals
BCRX
$2.35B
| $514K | ﹤0.01% |
+53,965
| New | +$419K |
|
|
MFA
3225
MFA Financial
MFA
$935M
| $514K | ﹤0.01% |
53,626
-50,517
| -49% | -$498K |
|
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.