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 | |
|---|---|---|---|---|---|---|
1326
PUT
ImmunityBio
IBRX
$7.44B
| $3.76M | ﹤0.01% |
489,700
+191,400
| +64% | +$1.31M |
|
1327
PUT
Whirlpool
WHR
$2.42B
| $3.75M | ﹤0.01% |
69,600
+14,400
| +26% | +$1.06M |
|
1328
CALL
VanEck Durable High Dividend ETF
DURA
$38.7M
| $3.75M | ﹤0.01% |
22,500
-9,900
| -31% | -$363K |
|
1329
PUT
BigBear.ai
BBAI
$1.32B
| $3.74M | ﹤0.01% |
1,063,000
-730,600
| -41% | -$3.39M |
|
|
GAP
1330
CALL
The Gap Inc
GAP
$6.84B
| $3.73M | ﹤0.01% |
154,300
-704,000
| -82% | -$18.6M |
|
1331
TTM Technologies
TTMI
$13.6B
| $3.73M | ﹤0.01% |
38,315
+26,071
| +213% | +$2.48M |
|
1332
PUT
KB Home
KBH
$3.48B
| $3.72M | ﹤0.01% |
71,800
-5,700
| -7% | -$335K |
|
1333
PUT
Check Point Software Technologies
CHKP
$13.3B
| $3.71M | ﹤0.01% |
+26,000
| New | +$4.35M |
|
1334
CALL
Protagonist Therapeutics
PTGX
$8.75B
| $3.71M | ﹤0.01% |
+35,200
| New | +$3.12M |
|
1335
PUT
Clorox
CLX
$11.6B
| $3.71M | ﹤0.01% |
35,800
+5,200
| +17% | +$590K |
|
1336
CALL
Peabody Energy
BTU
$2.78B
| $3.71M | ﹤0.01% |
112,500
-287,900
| -72% | -$10.1M |
|
1337
CALL
Murphy USA
MUSA
$11.3B
| $3.7M | ﹤0.01% |
7,500
-500
| -6% | -$214K |
|
|
SA
1338
CALL
Seabridge Gold
SA
$2.8B
| $3.7M | ﹤0.01% |
130,500
-188,600
| -59% | -$6.02M |
|
1339
PUT
Opendoor
OPEN
$3.69B
| $3.7M | ﹤0.01% |
1,063,800
-2,593,500
| -71% | -$14M |
|
1340
CALL
Methanex
MEOH
$4.32B
| $3.69M | ﹤0.01% |
62,000
+60,200
| +3,344% | +$3.03M |
|
1341
PUT
Lamb Weston
LW
$6.82B
| $3.69M | ﹤0.01% |
87,300
-15,300
| -15% | -$683K |
|
1342
CALL
Royalty Pharma
RPRX
$26.1B
| $3.67M | ﹤0.01% |
76,600
+46,400
| +154% | +$2.03M |
|
1343
PUT
PNC Financial Services
PNC
$100B
| $3.66M | ﹤0.01% |
17,600
-21,500
| -55% | -$4.68M |
|
1344
PUT
JPMorgan Inflation Managed Bond ETF
JCPI
$865M
| $3.65M | ﹤0.01% |
+65,800
| New | +$3.19M |
|
1345
Advance Auto Parts
AAP
$3.37B
| $3.64M | ﹤0.01% |
69,028
-22,725
| -25% | -$1.14M |
|
1346
CALL
Baxter International
BAX
$11.6B
| $3.63M | ﹤0.01% |
216,200
+74,600
| +53% | +$1.44M |
|
1347
CALL
WIX.com
WIX
$2.15B
| $3.63M | ﹤0.01% |
40,300
+25,300
| +169% | +$2.12M |
|
1348
PUT
CRISPR Therapeutics
CRSP
$4.58B
| $3.63M | ﹤0.01% |
76,300
-65,000
| -46% | -$3.43M |
|
1349
CALL
Celanese
CE
$5.09B
| $3.62M | ﹤0.01% |
55,100
| – | – |
|
1350
PUT
Humana
HUM
$46.7B
| $3.62M | ﹤0.01% |
20,900
-38,700
| -65% | -$7.93M |
|
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.