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 | |
|---|---|---|---|---|---|---|---|
4526
PUT
Asana
ASAN
$2.04B
| $166K | ﹤0.01% |
25,900
-19,500
| -43% | -$172K |
2020 Q4
21 quarters
|
|
4527
Dakota Gold
DC
$802M
| $165K | ﹤0.01% |
+32,762
| New | +$194K |
2026 Q1
0 quarters
|
|
4528
PUT
Amylyx Pharmaceuticals
AMLX
$3.58B
| $165K | ﹤0.01% |
11,900
+9,200
| +341% | +$129K |
2022 Q1
16 quarters
|
|
4529
Robert Half
RHI
$3.87B
| $165K | ﹤0.01% |
6,504
-9,640
| -60% | -$255K |
2025 Q2
3 quarters
|
|
4530
CALL
Mission Produce
AVO
$1.12B
| $165K | ﹤0.01% |
12,000
+10,200
| +567% | +$136K |
2021 Q4
17 quarters
|
|
|
NFGC
4531
CALL
New Found Gold
NFGC
$619M
| $165K | ﹤0.01% |
85,100
-49,000
| -37% | -$131K |
2025 Q2
3 quarters
|
|
4532
Triumph Financial Inc
TFIN
$1.46B
| $165K | ﹤0.01% |
2,761
+1,239
| +81% | +$77.5K |
2025 Q3
2 quarters
|
|
4533
W&T Offshore
WTI
$548M
| $164K | ﹤0.01% |
+48,234
| New | +$119K |
2026 Q1
0 quarters
|
|
4534
CALL
Algoma Steel
ASTL
$434M
| $164K | ﹤0.01% |
39,800
-93,800
| -70% | -$407K |
2022 Q2
15 quarters
|
|
4535
CALL
Ironwood Pharmaceuticals
IRWD
$621M
| $164K | ﹤0.01% |
+46,800
| New | +$192K |
2026 Q1
0 quarters
|
|
|
YSS
4536
PUT
York Space Systems
YSS
$1.18B
| $164K | ﹤0.01% |
+7,400
| New | +$179K |
2026 Q1
0 quarters
|
|
4537
Clover Health Investments
CLOV
$2.25B
| $164K | ﹤0.01% |
+93,109
| New | +$202K |
2026 Q1
0 quarters
|
|
4538
News Corp Class A
NWSA
$15.4B
| $164K | ﹤0.01% |
6,572
-7,440
| -53% | -$184K |
2025 Q4
1 quarter
|
|
4539
PUT
Perion Network
PERI
$345M
| $164K | ﹤0.01% |
16,400
-125,000
| -88% | -$1.13M |
2019 Q3
26 quarters
|
|
4540
Direxion Daily MSFT Bull 2X ETF
MSFU
$541M
| $164K | ﹤0.01% |
+7,112
| New | +$217K |
2026 Q1
0 quarters
|
|
4541
CALL
Polaris
PII
$2.98B
| $164K | ﹤0.01% |
3,000
-12,300
| -80% | -$770K |
2014 Q4
45 quarters
|
|
4542
PUT
Rambus
RMBS
$11.6B
| $163K | ﹤0.01% |
1,900
-3,100
| -62% | -$309K |
2018 Q3
30 quarters
|
|
4543
Atlanta Braves Holdings Series B
BATRK
$3.35B
| $163K | ﹤0.01% |
3,823
-40
| -1% | -$1.66K |
2025 Q2
3 quarters
|
|
4544
CALL
W.P. Carey
WPC
$14.5B
| $163K | ﹤0.01% |
2,400
-76,600
| -97% | -$5.37M |
2017 Q4
33 quarters
|
|
4545
PUT
Vanguard S&P 500 Growth ETF
VOOG
$27.6B
| $163K | ﹤0.01% |
2,400
-13,800
| -85% | -$998K |
2024 Q1
8 quarters
|
|
|
FMDG
4546
CALL
DELISTED
Fieldstone Merlin Dynamic Large Cap Growth ETF
FMDG
| $163K | ﹤0.01% |
4,000
-4,000
| -50% | -$163K |
2025 Q2
3 quarters
|
|
|
EQPT
4547
CALL
EquipmentShare.com Inc
EQPT
$4.43B
| $163K | ﹤0.01% |
+8,000
| New | +$229K |
2026 Q1
0 quarters
|
|
4548
PUT
Global Net Lease
GNL
$1.91B
| $163K | ﹤0.01% |
17,400
-22,800
| -57% | -$215K |
2018 Q3
30 quarters
|
|
4549
Fortress Biotech
FBIO
$69M
| $163K | ﹤0.01% |
+58,329
| New | +$198K |
2026 Q1
0 quarters
|
|
4550
PUT
Matthews International
MATW
$580M
| $163K | ﹤0.01% |
6,300
-8,700
| -58% | -$228K |
2025 Q3
2 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.