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 | |
|---|---|---|---|---|---|---|---|
|
BLD
6226
PUT
DELISTED
TopBuild
BLD
| $35.1K | ﹤0.01% |
100
-200
| -67% | -$89.6K |
2022 Q2
15 quarters
|
|
6227
PUT
Humacyte
HUMA
$140M
| $35.1K | ﹤0.01% |
57,900
+5,000
| +9% | +$5.2K |
2021 Q4
17 quarters
|
|
6228
CALL
Allison Transmission
ALSN
$9.6B
| $35.1K | ﹤0.01% |
+300
| New | +$34.1K |
2026 Q1
0 quarters
|
|
6229
CALL
Otter Tail
OTTR
$3.71B
| $35.1K | ﹤0.01% |
400
+300
| +300% | +$26K |
2025 Q4
1 quarter
|
|
6230
Tenaya Therapeutics
TNYA
$127M
| $35.1K | ﹤0.01% |
50,655
+12,112
| +31% | +$8.94K |
2023 Q3
10 quarters
|
|
6231
CALL
NewtekOne
NEWT
$325M
| $35K | ﹤0.01% |
3,200
-2,200
| -41% | -$27.9K |
2018 Q2
31 quarters
|
|
6232
CALL
Columbia Financial
CLBK
$3.01B
| $35K | ﹤0.01% |
+4,400
| New | +$34.4K |
2026 Q1
0 quarters
|
|
6233
CALL
Simmons First National
SFNC
$3.28B
| $35K | ﹤0.01% |
1,800
+800
| +80% | +$16K |
2022 Q4
13 quarters
|
|
6234
CALL
JELD-WEN Holding
JELD
$170M
| $35K | ﹤0.01% |
+28,200
| New | +$61.7K |
2026 Q1
0 quarters
|
|
6235
PUT
Lifecore Biomedical
LFCR
$248M
| $35K | ﹤0.01% |
9,400
-5,600
| -37% | -$38.7K |
2024 Q3
6 quarters
|
|
|
PVL
6236
CALL
Permianville Royalty Trust
PVL
$60.7M
| $35K | ﹤0.01% |
18,900
+17,700
| +1,475% | +$31.7K |
2025 Q2
3 quarters
|
|
|
AVR
6237
CALL
Anteris Technologies
AVR
$742M
| $35K | ﹤0.01% |
+6,300
| New | +$36.2K |
2026 Q1
0 quarters
|
|
|
BTCL
6238
CALL
T-Rex 2X Long Bitcoin Daily Target ETF
BTCL
$38.2M
| $35K | ﹤0.01% |
4,600
+1,900
| +70% | +$40.4K |
2024 Q4
5 quarters
|
|
6239
Range Nuclear Renaissance Index ETF
NUKZ
$693M
| $34.9K | ﹤0.01% |
+531
| New | +$37K |
2026 Q1
0 quarters
|
|
6240
CALL
Morgan Stanley Direct Lending Fund
MSDL
$1.15B
| $34.9K | ﹤0.01% |
+2,500
| New | +$38.7K |
2026 Q1
0 quarters
|
|
6241
PAR Technology
PAR
$595M
| $34.8K | ﹤0.01% |
2,612
-10,475
| -80% | -$246K |
2025 Q1
4 quarters
|
|
|
WBS
6242
PUT
DELISTED
Webster Financial
WBS
| $34.7K | ﹤0.01% |
500
-200
| -29% | -$13.7K |
2025 Q4
1 quarter
|
|
|
ATYR
6243
PUT
aTyr Pharma
ATYR
$28.8M
| $34.6K | ﹤0.01% |
44,300
-26,600
| -38% | -$22.5K |
2024 Q4
5 quarters
|
|
6244
Kyverna Therapeutics
KYTX
$403M
| $34.5K | ﹤0.01% |
+3,998
| New | +$33.3K |
2026 Q1
0 quarters
|
|
|
YQ
6245
17 Education & Technology Group
YQ
$34.1M
| $34.5K | ﹤0.01% |
+19,055
| New | +$59.8K |
2026 Q1
0 quarters
|
|
|
OTLY
6246
PUT
Oatly Group
OTLY
$348M
| $34.5K | ﹤0.01% |
3,400
-48,000
| -93% | -$532K |
2021 Q2
19 quarters
|
|
6247
PUT
Pinnacle Financial Partners Inc
PNFP
$14.3B
| $34.5K | ﹤0.01% |
+400
| New | +$37.2K |
2026 Q1
0 quarters
|
|
|
ODVWW
6248
PUT
DELISTED
Osisko Development Corp. Warrant
ODVWW
| $34.5K | ﹤0.01% |
10,600
-6,200
| -37% | -$20.1K |
2025 Q3
2 quarters
|
|
6249
CALL
Kite Realty
KRG
$4.9B
| $34.4K | ﹤0.01% |
1,400
-400
| -22% | -$9.85K |
2025 Q1
4 quarters
|
|
6250
Bio-Rad Laboratories Class A
BIO
$9.51B
| $34.3K | ﹤0.01% |
+123
| New | +$35.4K |
2026 Q1
0 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.