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 | |
|---|---|---|---|---|---|---|---|
4601
PUT
Globus Medical
GMED
$9.99B
| $155K | ﹤0.01% |
1,800
-15,700
| -90% | -$1.41M |
2024 Q4
5 quarters
|
|
4602
PUT
United States Gasoline Fund
UGA
$199M
| $155K | ﹤0.01% |
1,500
+1,400
| +1,400% | +$108K |
2025 Q4
1 quarter
|
|
4603
CALL
Krystal Biotech
KRYS
$9.63B
| $155K | ﹤0.01% |
600
+500
| +500% | +$133K |
2025 Q2
3 quarters
|
|
4604
CALL
Visteon
VC
$2.36B
| $155K | ﹤0.01% |
+1,700
| New | +$161K |
2026 Q1
0 quarters
|
|
4605
GraniteShares ETF Trust GraniteShares 2x Long META Daily ETF
FBL
$182M
| $155K | ﹤0.01% |
6,733
-49,020
| -88% | -$1.47M |
2025 Q3
2 quarters
|
|
4606
CALL
Mitsubishi UFJ Financial
MUFG
$255B
| $154K | ﹤0.01% |
+9,100
| New | +$162K |
2026 Q1
0 quarters
|
|
4607
PUT
Corporacion America
CAAP
$3.97B
| $154K | ﹤0.01% |
+6,100
| New | +$166K |
2026 Q1
0 quarters
|
|
4608
PUT
Impinj
PI
$5.62B
| $154K | ﹤0.01% |
+1,500
| New | +$200K |
2026 Q1
0 quarters
|
|
4609
PUT
Immunocore
IMCR
$1.57B
| $154K | ﹤0.01% |
5,100
+4,900
| +2,450% | +$159K |
2025 Q4
1 quarter
|
|
4610
PUT
nVent Electric
NVT
$26.8B
| $154K | ﹤0.01% |
1,300
+100
| +8% | +$11.4K |
2023 Q3
10 quarters
|
|
4611
Acacia Research
ACTG
$425M
| $154K | ﹤0.01% |
31,955
+13,874
| +77% | +$58.5K |
2025 Q3
2 quarters
|
|
|
AIRO
4612
CALL
AIRO Group Holdings
AIRO
$206M
| $154K | ﹤0.01% |
20,200
+5,700
| +39% | +$59.2K |
2025 Q3
2 quarters
|
|
4613
CALL
Phillips Edison & Co
PECO
$4.82B
| $153K | ﹤0.01% |
4,100
+2,100
| +105% | +$78.1K |
2025 Q2
3 quarters
|
|
4614
CALL
Coca-Cola Consolidated
COKE
$12.5B
| $153K | ﹤0.01% |
+800
| New | +$140K |
2026 Q1
0 quarters
|
|
4615
CALL
Ameresco
AMRC
$1.11B
| $153K | ﹤0.01% |
6,000
-24,700
| -80% | -$740K |
2025 Q1
4 quarters
|
|
4616
The Ensign Group
ENSG
$9.89B
| $153K | ﹤0.01% |
+758
| New | +$148K |
2026 Q1
0 quarters
|
|
4617
CALL
State Street Multi-Asset Real Return ETF
RLY
$1.38B
| $153K | ﹤0.01% |
3,800
-300
| -7% | -$10.4K |
2025 Q4
1 quarter
|
|
4618
PUT
Sprout Social
SPT
$629M
| $152K | ﹤0.01% |
26,700
+17,400
| +187% | +$134K |
2020 Q2
23 quarters
|
|
4619
PUT
Lantheus
LNTH
$6.51B
| $152K | ﹤0.01% |
2,000
+900
| +82% | +$64.6K |
2019 Q4
25 quarters
|
|
4620
CALL
Cousins Properties
CUZ
$4.55B
| $151K | ﹤0.01% |
6,700
| – | – |
2025 Q4
1 quarter
|
|
4621
PUT
Worthington Enterprises
WOR
$2.91B
| $151K | ﹤0.01% |
2,900
-3,900
| -57% | -$209K |
2025 Q1
4 quarters
|
|
4622
Icon
ICLR
$12.5B
| $151K | ﹤0.01% |
+1,366
| New | +$187K |
2026 Q1
0 quarters
|
|
4623
CALL
Vaxcyte
PCVX
$8.34B
| $151K | ﹤0.01% |
2,600
+2,500
| +2,500% | +$136K |
2022 Q2
15 quarters
|
|
4624
CALL
Alcon
ALC
$30.9B
| $151K | ﹤0.01% |
2,000
-12,200
| -86% | -$973K |
2019 Q2
27 quarters
|
|
|
TALK
4625
CALL
DELISTED
Talkspace
TALK
| $151K | ﹤0.01% |
29,100
+11,500
| +65% | +$50.9K |
2023 Q2
11 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.