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 | Miscellaneous | 98.3% |
| 2 | Technology | 0.62% |
| 3 | Communication Services | 0.22% |
| 4 | Consumer Discretionary | 0.21% |
| 5 | Healthcare | 0.2% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
7251
PUT
Schrodinger
SDGR
$2.31B
| $11.4K | ﹤0.01% |
1,000
-800
| -44% | -$11.1K |
|
|
VRE
7252
CALL
DELISTED
Veris Residential
VRE
| $11.3K | ﹤0.01% |
600
-400
| -40% | -$6.79K |
|
|
GOOD
7253
Gladstone Commercial Corp
GOOD
$603M
| $11.3K | ﹤0.01% |
988
-774
| -44% | -$9.08K |
|
|
AAT
7254
American Assets Trust
AAT
$1.31B
| $11.3K | ﹤0.01% |
+613
| New | +$11.5K |
|
7255
PUT
Kilroy Realty
KRC
$3.88B
| $11.3K | ﹤0.01% |
400
-300
| -43% | -$9.85K |
|
|
EHAB
7256
CALL
DELISTED
Enhabit
EHAB
| $11.3K | ﹤0.01% |
+800
| New | +$9.58K |
|
7257
CALL
Ingredion
INGR
$6B
| $11.3K | ﹤0.01% |
100
-100
| -50% | -$11.5K |
|
7258
PUT
Lands' End
LE
$304M
| $11.2K | ﹤0.01% |
+1,000
| New | +$15.8K |
|
7259
PUT
Silicon Motion
SIMO
$9.41B
| $11.2K | ﹤0.01% |
+100
| New | +$12.1K |
|
7260
Chegg
CHGG
$78.8M
| $11.2K | ﹤0.01% |
15,117
+7,223
| +91% | +$5.07K |
|
7261
Costamare
CMRE
$1.76B
| $11.2K | ﹤0.01% |
661
-29,056
| -98% | -$482K |
|
7262
CALL
Fortis
FTS
$26.9B
| $11.2K | ﹤0.01% |
200
-400
| -67% | -$22K |
|
7263
ACI Worldwide
ACIW
$5.05B
| $11.2K | ﹤0.01% |
272
-206
| -43% | -$8.65K |
|
7264
CALL
FingerMotion
FNGR
$13.6M
| $11.1K | ﹤0.01% |
11,200
-66,100
| -86% | -$78.9K |
|
7265
Invesco KBW High Dividend Yield Financial ETF
KBWD
$364M
| $11.1K | ﹤0.01% |
+888
| New | +$12K |
|
7266
PUT
Patrick Industries
PATK
$2.15B
| $11.1K | ﹤0.01% |
+100
| New | +$12.4K |
|
7267
CALL
Fomento Económico Mexicano
FMX
$40.1B
| $11.1K | ﹤0.01% |
+100
| New | +$10.8K |
|
7268
PUT
ProKidney
PROK
$345M
| $11.1K | ﹤0.01% |
6,200
-145,200
| -96% | -$308K |
|
7269
Vitesse Energy
VTS
$701M
| $11.1K | ﹤0.01% |
611
-3,192
| -84% | -$64.3K |
|
7270
Steven Madden
SHOO
$3.26B
| $11.1K | ﹤0.01% |
+327
| New | +$12.7K |
|
|
PBT
7271
Permian Basin Royalty Trust
PBT
$1.44B
| $11.1K | ﹤0.01% |
515
-58,513
| -99% | -$1.14M |
|
7272
CALL
KBR
KBR
$4.51B
| $11.1K | ﹤0.01% |
300
-300
| -50% | -$12.3K |
|
7273
CALL
Coty
COTY
$2.31B
| $11.1K | ﹤0.01% |
5,500
-42,400
| -89% | -$114K |
|
|
AAT
7274
CALL
American Assets Trust
AAT
$1.31B
| $11K | ﹤0.01% |
600
+500
| +500% | +$9.37K |
|
7275
PUT
Westlake Chemical Partners
WLKP
$745M
| $11K | ﹤0.01% |
500
-700
| -58% | -$15K |
|
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's Q1 2026 filing shows 2,157 new, 2,651 increased, 3,926 reduced and 1,574 closed positions. Its largest new stake was Amazon: 764,884 shares worth $159M. The largest sale was Apple, an estimated $174M.
By sector, the portfolio is most concentrated in Miscellaneous at 98% of assets, up from 98% a quarter earlier, followed by Technology and Communication Services.
- 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 2,157 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.