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 | |
|---|---|---|---|---|---|---|
1276
PUT
Liberty Energy
LBRT
$2.83B
| $3.99M | ﹤0.01% |
138,600
+80,900
| +140% | +$2.06M |
|
1277
PUT
Hershey
HSY
$35.4B
| $3.99M | ﹤0.01% |
19,200
-7,300
| -28% | -$1.54M |
|
1278
PUT
BioNTech
BNTX
$22.6B
| $3.98M | ﹤0.01% |
44,800
+10,000
| +29% | +$1.03M |
|
1279
PUT
Tapestry
TPR
$28.8B
| $3.98M | ﹤0.01% |
28,200
-60,300
| -68% | -$8.55M |
|
1280
PUT
SolarEdge
SEDG
$2.59B
| $3.97M | ﹤0.01% |
77,800
-92,100
| -54% | -$3.46M |
|
1281
CALL
MakeMyTrip
MMYT
$4.67B
| $3.96M | ﹤0.01% |
+106,300
| New | +$6.16M |
|
1282
PUT
Praxis Precision Medicines
PRAX
$9.07B
| $3.96M | ﹤0.01% |
+12,300
| New | +$3.81M |
|
1283
CALL
Air Products & Chemicals
APD
$66.3B
| $3.95M | ﹤0.01% |
13,600
-10,300
| -43% | -$2.84M |
|
1284
CALL
Alaska Air
ALK
$5.15B
| $3.95M | ﹤0.01% |
107,300
+65,200
| +155% | +$3.14M |
|
1285
State Street Technology Select Sector SPDR ETF
XLK
$115B
| $3.95M | ﹤0.01% |
29,695
-21,018
| -41% | -$2.96M |
|
1286
CALL
Best Buy
BBY
$18B
| $3.94M | ﹤0.01% |
61,300
-27,900
| -31% | -$1.83M |
|
1287
CALL
AES
AES
$10.6B
| $3.94M | ﹤0.01% |
279,300
-258,200
| -48% | -$3.84M |
|
1288
Marvell Technology
MRVL
$174B
| $3.93M | ﹤0.01% |
39,690
-205,752
| -84% | -$17.3M |
|
1289
Zscaler
ZS
$23B
| $3.93M | ﹤0.01% |
28,012
+15,352
| +121% | +$2.72M |
|
1290
PUT
PG&E
PCG
$47.8B
| $3.93M | ﹤0.01% |
223,600
-773,600
| -78% | -$13.2M |
|
1291
PUT
AerCap
AER
$23.9B
| $3.92M | ﹤0.01% |
28,600
+22,400
| +361% | +$3.2M |
|
1292
CALL
Hilton Worldwide
HLT
$74B
| $3.92M | ﹤0.01% |
12,900
-11,600
| -47% | -$3.52M |
|
1293
PUT
Equinox Gold
EQX
$7.32B
| $3.92M | ﹤0.01% |
271,100
-32,500
| -11% | -$497K |
|
1294
PUT
iShares Convertible Bond ETF
ICVT
$7.23B
| $3.92M | ﹤0.01% |
88,300
+2,900
| +3% | +$300K |
|
1295
PUT
uniQure
QURE
$2.68B
| $3.91M | ﹤0.01% |
239,300
-56,500
| -19% | -$1.14M |
|
1296
iShares US Home Construction ETF
ITB
$2.41B
| $3.91M | ﹤0.01% |
43,132
+4,644
| +12% | +$475K |
|
1297
CALL
Viavi Solutions
VIAV
$9.75B
| $3.9M | ﹤0.01% |
117,200
-318,700
| -73% | -$8.42M |
|
1298
First Trust Natural Gas ETF
FCG
$632M
| $3.89M | ﹤0.01% |
122,875
+121,850
| +11,888% | +$3.29M |
|
|
WRD
1299
CALL
WeRide Inc
WRD
$1.75B
| $3.89M | ﹤0.01% |
480,900
-184,800
| -28% | -$1.43M |
|
|
FIG
1300
PUT
Figma
FIG
$11.2B
| $3.88M | ﹤0.01% |
183,400
+28,900
| +19% | +$793K |
|
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.