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 | |
|---|---|---|---|---|---|---|---|
5901
PUT
Hubbell
HUBB
$25B
| $49.1K | ﹤0.01% |
100
-100
| -50% | -$49.1K |
2025 Q3
2 quarters
|
|
5902
CALL
Lightbridge
LTBR
$223M
| $49K | ﹤0.01% |
4,600
-25,600
| -85% | -$356K |
2024 Q3
6 quarters
|
|
5903
AvePoint
AVPT
$3.02B
| $49K | ﹤0.01% |
5,156
+3,632
| +238% | +$40.9K |
2025 Q4
1 quarter
|
|
5904
PUT
Knife River
KNF
$2.83B
| $49K | ﹤0.01% |
+600
| New | +$48.3K |
2026 Q1
0 quarters
|
|
5905
CALL
Innoviva
INVA
$1.49B
| $48.9K | ﹤0.01% |
2,100
+600
| +40% | +$12.9K |
2025 Q4
1 quarter
|
|
|
GRFS
5906
PUT
Grifois
GRFS
$5B
| $48.9K | ﹤0.01% |
6,100
+4,200
| +221% | +$37K |
2020 Q3
22 quarters
|
|
5907
H&R Block
HRB
$5.2B
| $48.9K | ﹤0.01% |
1,540
-11,663
| -88% | -$406K |
2025 Q3
2 quarters
|
|
|
BTGO
5908
BitGo Holdings
BTGO
$864M
| $48.9K | ﹤0.01% |
+5,937
| New | +$64.9K |
2026 Q1
0 quarters
|
|
5909
PUT
Camden Property Trust
CPT
$11.1B
| $48.8K | ﹤0.01% |
500
-800
| -62% | -$84.8K |
2023 Q1
12 quarters
|
|
|
BZUN
5910
CALL
Baozun
BZUN
$180M
| $48.8K | ﹤0.01% |
20,400
-34,700
| -63% | -$90.3K |
2017 Q1
36 quarters
|
|
5911
State Street SPDR Portfolio Developed World ex-US ETF
SPDW
$41.1B
| $48.8K | ﹤0.01% |
+1,068
| New | +$50.1K |
2026 Q1
0 quarters
|
|
|
PROF
5912
CALL
Profound Medical
PROF
$214M
| $48.6K | ﹤0.01% |
7,500
+7,400
| +7,400% | +$51.1K |
2025 Q4
1 quarter
|
|
5913
PUT
Tilly's
TLYS
$139M
| $48.6K | ﹤0.01% |
12,000
+11,900
| +11,900% | +$24K |
2025 Q4
1 quarter
|
|
5914
CALL
National Health Investors
NHI
$3.23B
| $48.5K | ﹤0.01% |
600
+100
| +20% | +$8.33K |
2025 Q2
3 quarters
|
|
5915
CALL
Horizon Technology Finance
HRZN
$310M
| $48.4K | ﹤0.01% |
11,500
+2,400
| +26% | +$13.9K |
2025 Q2
3 quarters
|
|
5916
Vishay Precision Group
VPG
$1.05B
| $48.3K | ﹤0.01% |
1,113
-611
| -35% | -$27.6K |
2025 Q4
1 quarter
|
|
5917
CALL
Lakeland Industries
LAKE
$100M
| $48.3K | ﹤0.01% |
5,900
-18,200
| -76% | -$164K |
2025 Q3
2 quarters
|
|
|
CAI
5918
CALL
Caris Life Sciences
CAI
$8.01B
| $48.3K | ﹤0.01% |
2,700
-6,800
| -72% | -$149K |
2025 Q2
3 quarters
|
|
5919
PUT
First American
FAF
$6.38B
| $48.2K | ﹤0.01% |
+800
| New | +$51.2K |
2026 Q1
0 quarters
|
|
5920
CALL
Appian
APPN
$2.67B
| $48.2K | ﹤0.01% |
2,000
+100
| +5% | +$2.71K |
2021 Q1
20 quarters
|
|
5921
SPX Corp
SPXC
$8.7B
| $48.2K | ﹤0.01% |
241
-391
| -62% | -$84K |
2025 Q3
2 quarters
|
|
5922
Perimeter Solutions
PRM
$4.48B
| $48.2K | ﹤0.01% |
1,972
-32,910
| -94% | -$840K |
2025 Q3
2 quarters
|
|
5923
PUT
Takeda Pharmaceutical
TAK
$57B
| $48.2K | ﹤0.01% |
+2,600
| New | +$45.6K |
2026 Q1
0 quarters
|
|
5924
CALL
iPath Bloomberg Commodity Index Total Return ETN due 12 June 2036
DJP
$863M
| $48.1K | ﹤0.01% |
+1,000
| New | +$42.8K |
2026 Q1
0 quarters
|
|
5925
Immatics
IMTX
$1.21B
| $48.1K | ﹤0.01% |
+4,891
| New | +$47.9K |
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.