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 | |
|---|---|---|---|---|---|---|
5976
Bausch Health
BHC
$1.7B
| $45.7K | ﹤0.01% |
8,456
+1,978
| +31% | +$11.8K |
|
5977
PUT
Aquestive Therapeutics
AQST
$494M
| $45.6K | ﹤0.01% |
11,000
-53,300
| -83% | -$216K |
|
|
XOVR
5978
PUT
EntrepreneurShares Series Trust ERShares Private-Public Crossover ETF
XOVR
$1.87B
| $45.6K | ﹤0.01% |
+2,700
| New | +$49.1K |
|
5979
John B. Sanfilippo & Son
JBSS
$939M
| $45.5K | ﹤0.01% |
+574
| New | +$44.2K |
|
5980
CALL
Theravance Biopharma
TBPH
$871M
| $45.4K | ﹤0.01% |
2,800
-27,300
| -91% | -$483K |
|
5981
PUT
Regency Centers
REG
$15.1B
| $45.4K | ﹤0.01% |
600
| – | – |
|
5982
PUT
LivePerson
LPSN
$18.6M
| $45.4K | ﹤0.01% |
17,800
-12,400
| -41% | -$37.8K |
|
|
SEE
5983
DELISTED
Sealed Air
SEE
| $45.4K | ﹤0.01% |
1,079
-6,599
| -86% | -$276K |
|
5984
Taboola.com
TBLA
$1.34B
| $45.4K | ﹤0.01% |
14,632
-48,506
| -77% | -$173K |
|
5985
iShares MSCI Brazil Small-Cap ETF
EWZS
$236M
| $45.3K | ﹤0.01% |
3,060
+2,969
| +3,263% | +$43K |
|
5986
PUT
Sprott Junior Gold Miners ETF
SGDJ
$281M
| $45.3K | ﹤0.01% |
600
+400
| +200% | +$38.7K |
|
5987
PUT
Kopin
KOPN
$695M
| $45.2K | ﹤0.01% |
20,100
-13,500
| -40% | -$32.7K |
|
5988
Perion Network
PERI
$364M
| $45.2K | ﹤0.01% |
+4,527
| New | +$41K |
|
|
LGN
5989
CALL
Legence Corp
LGN
$5.6B
| $45.2K | ﹤0.01% |
+800
| New | +$40.3K |
|
5990
Global X Russell 2000 Covered Call ETF
RYLD
$1.37B
| $45.1K | ﹤0.01% |
+3,019
| New | +$46.7K |
|
|
AVGG
5991
Leverage Shares 2X Long AVGO Daily ETF
AVGG
$60.5M
| $45.1K | ﹤0.01% |
+2,221
| New | +$52.7K |
|
5992
CALL
Genco Shipping & Trading
GNK
$1.11B
| $45.1K | ﹤0.01% |
+2,000
| New | +$42.8K |
|
5993
PUT
Delek US
DK
$4.06B
| $45.1K | ﹤0.01% |
1,000
-600
| -38% | -$21.4K |
|
5994
CALL
Gilat Satellite Networks
GILT
$854M
| $45.1K | ﹤0.01% |
+3,000
| New | +$49.9K |
|
5995
Honda
HMC
$37B
| $45K | ﹤0.01% |
1,853
-6,200
| -77% | -$180K |
|
5996
CarParts.com
PRTS
$35.8M
| $45K | ﹤0.01% |
5,724
+1,631
| +40% | +$10.6K |
|
5997
CALL
Kimbell Royalty Partners
KRP
$1.49B
| $44.9K | ﹤0.01% |
3,100
-20,500
| -87% | -$281K |
|
|
MBX
5998
PUT
MBX Biosciences
MBX
$2.77B
| $44.8K | ﹤0.01% |
1,500
-43,200
| -97% | -$1.47M |
|
|
SSK
5999
REX-Osprey SOL + Staking ETF
SSK
$73.4M
| $44.8K | ﹤0.01% |
3,980
-3,096
| -44% | -$45.1K |
|
6000
Caleres
CAL
$422M
| $44.8K | ﹤0.01% |
+4,248
| New | +$50.6K |
|
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.