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 | |
|---|---|---|---|---|---|---|---|
6551
CONMED
CNMD
$1.38B
| $25.6K | ﹤0.01% |
+723
| New | +$29.4K |
2026 Q1
0 quarters
|
|
6552
Avery Dennison
AVY
$13B
| $25.6K | ﹤0.01% |
148
-2,657
| -95% | -$488K |
2025 Q4
1 quarter
|
|
6553
Grupo Aeroportuario del Sureste
ASR
$6.94B
| $25.5K | ﹤0.01% |
+76
| New | +$26K |
2026 Q1
0 quarters
|
|
6554
CPS Technologies
CPSH
$73.5M
| $25.5K | ﹤0.01% |
6,830
-1,474
| -18% | -$6.53K |
2025 Q1
4 quarters
|
|
6555
Lakeland Industries
LAKE
$101M
| $25.5K | ﹤0.01% |
3,118
+1,822
| +141% | +$16.4K |
2025 Q1
4 quarters
|
|
|
GTM
6556
ZoomInfo Technologies
GTM
$1.12B
| $25.5K | ﹤0.01% |
+4,267
| New | +$31.4K |
2026 Q1
0 quarters
|
|
6557
CALL
Standex International
SXI
$3.5B
| $25.5K | ﹤0.01% |
+100
| New | +$25.1K |
2026 Q1
0 quarters
|
|
|
STLN
6558
PUT
Starling Oncology
STLN
$633M
| $25.5K | ﹤0.01% |
8,300
+7,800
| +1,560% | +$23.9K |
2025 Q4
1 quarter
|
|
6559
CALL
Offerpad Solutions Inc. Class A Common Stock
OPAD
$16M
| $25.4K | ﹤0.01% |
3,880
-17,960
| -82% | -$176K |
2025 Q3
2 quarters
|
|
6560
Main Street Capital
MAIN
$5.2B
| $25.4K | ﹤0.01% |
480
-1,243
| -72% | -$73.6K |
2025 Q4
1 quarter
|
|
6561
PUT
LHA Market State Tactical Beta ETF
MSTB
$197M
| $25.4K | ﹤0.01% |
1,500
+1,400
| +1,400% | +$55.7K |
2023 Q4
9 quarters
|
|
6562
abrdn Bloomberg All Commodity Longer Dated Strategy K-1 Free ETF
BCD
$439M
| $25.4K | ﹤0.01% |
709
+275
| +63% | +$9.32K |
2025 Q4
1 quarter
|
|
6563
Kopin
KOPN
$857M
| $25.4K | ﹤0.01% |
11,268
-73,406
| -87% | -$178K |
2024 Q1
8 quarters
|
|
|
AIBU
6564
Direxion Daily AI and Big Data Bull 2X ETF
AIBU
$27.1M
| $25.3K | ﹤0.01% |
703
+574
| +445% | +$25.1K |
2025 Q4
1 quarter
|
|
|
SUNS
6565
CALL
Sunrise Realty Trust
SUNS
$84.9M
| $25.3K | ﹤0.01% |
3,300
-7,600
| -70% | -$69.1K |
2025 Q1
4 quarters
|
|
|
PTRN
6566
Pattern Group Inc
PTRN
$3.09B
| $25.3K | ﹤0.01% |
2,036
+1,133
| +125% | +$13.9K |
2025 Q4
1 quarter
|
|
|
ASM
6567
PUT
Avino Silver & Gold Mines
ASM
$936M
| $25.3K | ﹤0.01% |
+4,000
| New | +$32K |
2026 Q1
0 quarters
|
|
6568
Shenandoah Telecom
SHEN
$617M
| $25.3K | ﹤0.01% |
+1,639
| New | +$21.4K |
2026 Q1
0 quarters
|
|
6569
CALL
Upbound Group
UPBD
$914M
| $25.3K | ﹤0.01% |
1,400
+200
| +17% | +$3.9K |
2016 Q2
39 quarters
|
|
6570
InMode
INMD
$808M
| $25.3K | ﹤0.01% |
1,847
-63,896
| -97% | -$911K |
2023 Q4
9 quarters
|
|
|
ARMG
6571
Leverage Shares 2X Long ARM Daily ETF
ARMG
$76.7M
| $25.2K | ﹤0.01% |
+2,599
| New | +$17.5K |
2026 Q1
0 quarters
|
|
6572
PUT
NewtekOne
NEWT
$325M
| $25.2K | ﹤0.01% |
2,300
+1,900
| +475% | +$24.1K |
2024 Q1
8 quarters
|
|
6573
PUT
Korn Ferry
KFY
$4.05B
| $25.2K | ﹤0.01% |
400
-1,100
| -73% | -$71K |
2024 Q4
5 quarters
|
|
6574
PUT
RCI Hospitality Holdings
RICK
$206M
| $25.1K | ﹤0.01% |
1,100
-700
| -39% | -$16.5K |
2018 Q3
30 quarters
|
|
6575
PUT
Rocket Pharmaceuticals
RCKT
$284M
| $25.1K | ﹤0.01% |
7,000
-4,900
| -41% | -$19.5K |
2022 Q1
16 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.