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 | Held Since | |
|---|---|---|---|---|---|---|---|
|
FLNA
5401
PUT
Filana Therapeutics
FLNA
$45M
| $75.7K | ﹤0.01% |
44,800
-156,100
| -78% | -$321K |
2021 Q1
20 quarters
|
|
5402
PUT
WisdomTree US Total Dividend Fund
DTD
$1.64B
| $75.7K | ﹤0.01% |
700
-1,200
| -63% | -$105K |
2014 Q4
45 quarters
|
|
|
CTLP
5403
CALL
DELISTED
Cantaloupe
CTLP
| $75.7K | ﹤0.01% |
7,000
-400
| -5% | -$4.23K |
2020 Q4
21 quarters
|
|
|
SFD
5404
PUT
Smithfield Foods
SFD
$7.43B
| $75.5K | ﹤0.01% |
2,700
+1,500
| +125% | +$36.1K |
2025 Q3
2 quarters
|
|
5405
CALL
Aegon
AEG
$12.5B
| $75.5K | ﹤0.01% |
10,400
-60,700
| -85% | -$452K |
2024 Q4
5 quarters
|
|
5406
loanDepot
LDI
$215M
| $75.4K | ﹤0.01% |
53,130
-33,882
| -39% | -$69.7K |
2025 Q2
3 quarters
|
|
5407
CALL
Erie Indemnity
ERIE
$11.6B
| $75.4K | ﹤0.01% |
+300
| New | +$80.5K |
2026 Q1
0 quarters
|
|
|
TSPY
5408
TappAlpha S&P 500 Growth & Daily Income ETF
TSPY
$342M
| $75.3K | ﹤0.01% |
+3,251
| New | +$80.7K |
2026 Q1
0 quarters
|
|
5409
CALL
Invesco CurrencyShares Australian Dollar Trust
FXA
$93M
| $75.2K | ﹤0.01% |
+1,100
| New | +$75.8K |
2026 Q1
0 quarters
|
|
5410
PUT
Sasol
SSL
$8.94B
| $75.2K | ﹤0.01% |
5,800
+2,600
| +81% | +$22.7K |
2025 Q3
2 quarters
|
|
5411
CALL
Universal Insurance Holdings
UVE
$1.22B
| $75.2K | ﹤0.01% |
2,200
-700
| -24% | -$22.5K |
2023 Q3
10 quarters
|
|
5412
Coherus Oncology
CHRS
$179M
| $75K | ﹤0.01% |
44,402
-3,642
| -8% | -$6.47K |
2025 Q1
4 quarters
|
|
5413
CALL
Lithia Motors
LAD
$6.77B
| $74.9K | ﹤0.01% |
300
+200
| +200% | +$59.4K |
2019 Q3
26 quarters
|
|
5414
CALL
Electromed
ELMD
$233M
| $74.9K | ﹤0.01% |
3,200
+1,700
| +113% | +$44.3K |
2025 Q1
4 quarters
|
|
5415
PUT
Marten Transport
MRTN
$1.09B
| $74.8K | ﹤0.01% |
+5,700
| New | +$73.1K |
2026 Q1
0 quarters
|
|
|
AHRT
5416
CALL
AH Realty Trust
AHRT
$450M
| $74.8K | ﹤0.01% |
+13,600
| New | +$86.9K |
2026 Q1
0 quarters
|
|
5417
CALL
Rollins
ROL
$14.5B
| $74.8K | ﹤0.01% |
1,400
-16,400
| -92% | -$976K |
2017 Q3
34 quarters
|
|
5418
PUT
Dave & Buster's
PLAY
$235M
| $74.7K | ﹤0.01% |
6,900
-42,100
| -86% | -$673K |
2017 Q3
34 quarters
|
|
5419
IPG Photonics
IPGP
$3.58B
| $74.7K | ﹤0.01% |
+652
| New | +$70.8K |
2026 Q1
0 quarters
|
|
5420
Direxion Daily Magnificent 7 Bear 1X ETF
QQQD
$28.3M
| $74.7K | ﹤0.01% |
+5,067
| New | +$69.6K |
2026 Q1
0 quarters
|
|
5421
PUT
Federal Realty Investment Trust
FRT
$9.27B
| $74.3K | ﹤0.01% |
700
-500
| -42% | -$52.3K |
2018 Q1
32 quarters
|
|
|
XNET
5422
Xunlei
XNET
$300M
| $74.3K | ﹤0.01% |
+13,360
| New | +$84.9K |
2026 Q1
0 quarters
|
|
|
CPXR
5423
USCF Daily Target 2X Copper Index ETF
CPXR
$13.6M
| $74.3K | ﹤0.01% |
+2,986
| New | +$81.3K |
2026 Q1
0 quarters
|
|
5424
iShares Global Clean Energy ETF
ICLN
$2.23B
| $74.3K | ﹤0.01% |
+4,060
| New | +$73.9K |
2026 Q1
0 quarters
|
|
|
TSMU
5425
GraniteShares 2x Long TSM Daily ETF
TSMU
$51.3M
| $74.2K | ﹤0.01% |
1,470
-1,512
| -51% | -$82.2K |
2025 Q1
4 quarters
|
|
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.