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 | |
|---|---|---|---|---|---|---|
1301
CALL
CoStar Group
CSGP
$11.3B
| $3.87M | ﹤0.01% |
95,900
-81,700
| -46% | -$4.25M |
|
1302
PUT
Li Auto
LI
$12.6B
| $3.87M | ﹤0.01% |
216,900
-563,000
| -72% | -$9.83M |
|
1303
PUT
Corcept Therapeutics
CORT
$10.2B
| $3.87M | ﹤0.01% |
95,900
-137,800
| -59% | -$5.15M |
|
1304
CALL
Progressive
PGR
$124B
| $3.87M | ﹤0.01% |
19,500
-13,600
| -41% | -$2.81M |
|
1305
PUT
Celestica
CLS
$35.1B
| $3.86M | ﹤0.01% |
13,700
-144,500
| -91% | -$41.9M |
|
|
TYNS
1306
PUT
DELISTED
Direxion Daily 7-10 Year Treasury Bear 1X Shares
TYNS
| $3.85M | ﹤0.01% |
32,900
+9,200
| +39% | +$1.08M |
|
1307
PUT
Cedar Fair
FUN
$1.78B
| $3.85M | ﹤0.01% |
+216,700
| New | +$3.66M |
|
1308
CALL
Campbell Soup
CPB
$6.51B
| $3.84M | ﹤0.01% |
172,600
+91,400
| +113% | +$2.35M |
|
1309
CALL
Unilever
UL
$131B
| $3.83M | ﹤0.01% |
84,600
+11,500
| +16% | +$771K |
|
1310
PUT
Viking Holdings
VIK
$44.9B
| $3.81M | ﹤0.01% |
51,900
+22,800
| +78% | +$1.67M |
|
1311
CALL
Natera
NTRA
$37.5B
| $3.8M | ﹤0.01% |
19,000
+14,600
| +332% | +$3.14M |
|
1312
CALL
Comstock Resources
CRK
$3.97B
| $3.8M | ﹤0.01% |
180,200
+101,100
| +128% | +$2.15M |
|
1313
CALL
Amdocs
DOX
$5.53B
| $3.8M | ﹤0.01% |
58,200
+20,100
| +53% | +$1.47M |
|
1314
PUT
Diageo
DEO
$46.2B
| $3.8M | ﹤0.01% |
51,000
+8,200
| +19% | +$715K |
|
1315
PUT
Saia
SAIA
$11.3B
| $3.79M | ﹤0.01% |
10,800
+9,000
| +500% | +$3.28M |
|
1316
uniQure
QURE
$2.68B
| $3.79M | ﹤0.01% |
231,769
+121,094
| +109% | +$2.45M |
|
1317
Plexus
PLXS
$6.81B
| $3.78M | ﹤0.01% |
18,687
+12,829
| +219% | +$2.44M |
|
1318
Invesco DB Agriculture Fund
DBA
$1.26B
| $3.78M | ﹤0.01% |
+138,363
| New | +$3.61M |
|
1319
PUT
Baker Hughes
BKR
$56.8B
| $3.78M | ﹤0.01% |
61,900
-29,400
| -32% | -$1.7M |
|
1320
CALL
Hawaiian Electric Industries
HE
$2.33B
| $3.78M | ﹤0.01% |
254,500
-75,700
| -23% | -$1.14M |
|
1321
Rigetti Computing
RGTI
$4.7B
| $3.77M | ﹤0.01% |
268,841
-166,485
| -38% | -$3.12M |
|
1322
PUT
JFrog
FROG
$9.71B
| $3.77M | ﹤0.01% |
80,400
+59,200
| +279% | +$2.91M |
|
1323
PUT
NRG Energy
NRG
$29.8B
| $3.77M | ﹤0.01% |
25,800
-68,600
| -73% | -$10.8M |
|
1324
CALL
Realty Income
O
$61.2B
| $3.76M | ﹤0.01% |
61,500
-58,200
| -49% | -$3.64M |
|
1325
CALL
HubSpot
HUBS
$10.5B
| $3.76M | ﹤0.01% |
15,400
-4,000
| -21% | -$1.12M |
|
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.