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 | |
|---|---|---|---|---|---|---|
1251
CALL
Sharplink Inc
SBET
$1.22B
| $4.07M | ﹤0.01% |
630,300
-299,200
| -32% | -$2.42M |
|
1252
American Tower
AMT
$77.7B
| $4.06M | ﹤0.01% |
23,508
+8,776
| +60% | +$1.58M |
|
1253
PUT
TransDigm Group
TDG
$69.2B
| $4.06M | ﹤0.01% |
3,500
+3,400
| +3,400% | +$4.46M |
|
1254
PUT
Crocs
CROX
$6.69B
| $4.04M | ﹤0.01% |
48,700
-20,000
| -29% | -$1.71M |
|
1255
PUT
Trane Technologies
TT
$106B
| $4.04M | ﹤0.01% |
9,700
+6,000
| +162% | +$2.55M |
|
1256
Antero Resources
AR
$10.9B
| $4.04M | ﹤0.01% |
+95,227
| New | +$3.48M |
|
1257
CALL
GitLab
GTLB
$5.28B
| $4.04M | ﹤0.01% |
186,500
-217,600
| -54% | -$6.36M |
|
|
CHGX
1258
CALL
DELISTED
AXS Change Finance ESG ETF
CHGX
| $4.04M | ﹤0.01% |
+136,200
| New | +$4.04M |
|
1259
PUT
Upstart Holdings
UPST
$2.58B
| $4.03M | ﹤0.01% |
157,200
-92,200
| -37% | -$3.24M |
|
1260
CALL
Williams-Sonoma
WSM
$26.7B
| $4.03M | ﹤0.01% |
22,100
+15,200
| +220% | +$3.03M |
|
|
ETHE
1261
CALL
Grayscale Ethereum Staking ETF Shares
ETHE
$1.51B
| $4.03M | ﹤0.01% |
+236,000
| New | +$4.61M |
|
1262
CALL
FMC
FMC
$1.42B
| $4.03M | ﹤0.01% |
233,800
-17,500
| -7% | -$262K |
|
1263
CALL
Hudbay
HBM
$9.92B
| $4.03M | ﹤0.01% |
192,600
+12,600
| +7% | +$295K |
|
1264
iShares Russell 2000 ETF
IWM
$80.9B
| $4.02M | ﹤0.01% |
+16,229
| New | +$4.19M |
|
|
VISN
1265
PUT
Vistance Networks Inc
VISN
$2.66B
| $4.02M | ﹤0.01% |
221,000
-95,900
| -30% | -$1.75M |
|
|
1266
CALL
American Tower
AMT
$77.7B
| $4.02M | ﹤0.01% |
23,300
-11,900
| -34% | -$2.14M |
|
1267
Applied Materials
AMAT
$426B
| $4.02M | ﹤0.01% |
11,757
-2,874
| -20% | -$967K |
|
1268
CALL
Twilio
TWLO
$29.1B
| $4.01M | ﹤0.01% |
31,900
-104,300
| -77% | -$12.8M |
|
1269
CALL
Kinross Gold
KGC
$28.5B
| $4M | ﹤0.01% |
131,000
-370,000
| -74% | -$12.1M |
|
1270
PUT
Proshares UltraShort Technology
REW
$3.48M
| $4M | ﹤0.01% |
118,800
-6,500
| -5% | -$148K |
|
1271
PUT
Teucrium Corn Fund
CORN
$190M
| $4M | ﹤0.01% |
172,800
+162,400
| +1,562% | +$2.89M |
|
1272
CALL
Keurig Dr Pepper
KDP
$40.4B
| $4M | ﹤0.01% |
151,800
-402,700
| -73% | -$11.3M |
|
1273
CALL
Royal Gold
RGLD
$17.1B
| $4M | ﹤0.01% |
15,700
-1,100
| -7% | -$292K |
|
1274
PUT
United States Natural Gas Fund
UNG
$470M
| $3.99M | ﹤0.01% |
340,500
-65,700
| -16% | -$811K |
|
1275
PUT
Owens Corning
OC
$11.5B
| $3.99M | ﹤0.01% |
36,900
-6,600
| -15% | -$787K |
|
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.