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 | |
|---|---|---|---|---|---|---|---|
|
TWO
3901
DELISTED
Two Harbors Investment
TWO
| $279K | ﹤0.01% |
24,466
-32,528
| -57% | -$364K |
2025 Q3
2 quarters
|
|
3902
CALL
Mineralys Therapeutics
MLYS
$2.1B
| $279K | ﹤0.01% |
10,300
+9,800
| +1,960% | +$287K |
2024 Q2
7 quarters
|
|
3903
SL Green Realty
SLG
$3.46B
| $279K | ﹤0.01% |
7,551
+7,443
| +6,892% | +$310K |
2025 Q4
1 quarter
|
|
3904
CALL
Photronics
PLAB
$1.82B
| $279K | ﹤0.01% |
6,900
-140,500
| -95% | -$5.08M |
2018 Q2
31 quarters
|
|
3905
LifeMD
LFMD
$138M
| $279K | ﹤0.01% |
77,215
-3,350
| -4% | -$11.6K |
2025 Q2
3 quarters
|
|
3906
CALL
Lennox International
LII
$12.5B
| $278K | ﹤0.01% |
600
| – | – |
2023 Q2
11 quarters
|
|
3907
CALL
Globe Life
GL
$12.7B
| $278K | ﹤0.01% |
2,000
+1,100
| +122% | +$155K |
2020 Q4
21 quarters
|
|
3908
CALL
Outdoor Holding Co
POWW
$265M
| $278K | ﹤0.01% |
138,200
+47,000
| +52% | +$89.5K |
2021 Q1
20 quarters
|
|
|
DMC
3909
Del Monte Corp
DMC
$1.39B
| $277K | ﹤0.01% |
6,889
+6,717
| +3,905% | +$268K |
2024 Q4
5 quarters
|
|
3910
Gold Royalty Corp
GROY
$693M
| $277K | ﹤0.01% |
77,386
-82,405
| -52% | -$352K |
2025 Q3
2 quarters
|
|
3911
PUT
Ryman Hospitality Properties
RHP
$8.34B
| $277K | ﹤0.01% |
3,000
| – | – |
2025 Q4
1 quarter
|
|
3912
CALL
Flowers Foods
FLO
$1.18B
| $276K | ﹤0.01% |
33,900
+18,800
| +125% | +$189K |
2016 Q1
40 quarters
|
|
3913
PUT
Carpenter Technology
CRS
$19B
| $276K | ﹤0.01% |
+700
| New | +$255K |
2026 Q1
0 quarters
|
|
|
MFA
3914
CALL
MFA Financial
MFA
$782M
| $276K | ﹤0.01% |
28,800
+13,400
| +87% | +$132K |
2020 Q1
24 quarters
|
|
3915
Keurig Dr Pepper
KDP
$41.8B
| $276K | ﹤0.01% |
+10,474
| New | +$294K |
2026 Q1
0 quarters
|
|
3916
CALL
Heritage Insurance Holdings
HRTG
$1.01B
| $276K | ﹤0.01% |
+10,500
| New | +$277K |
2026 Q1
0 quarters
|
|
3917
PUT
Neumora Therapeutics
NMRA
$103M
| $275K | ﹤0.01% |
141,100
+140,900
| +70,450% | +$365K |
2025 Q3
2 quarters
|
|
|
BCAX
3918
CALL
Bicara Therapeutics
BCAX
$1.2B
| $274K | ﹤0.01% |
13,800
+13,500
| +4,500% | +$232K |
2024 Q4
5 quarters
|
|
3919
PUT
LendingTree
TREE
$345M
| $274K | ﹤0.01% |
6,400
+6,100
| +2,033% | +$292K |
2016 Q1
40 quarters
|
|
3920
CALL
Amphastar Pharmaceuticals
AMPH
$1.08B
| $274K | ﹤0.01% |
+14,000
| New | +$343K |
2026 Q1
0 quarters
|
|
3921
Archrock
AROC
$5.33B
| $274K | ﹤0.01% |
7,877
+3,873
| +97% | +$124K |
2025 Q3
2 quarters
|
|
3922
Enova International
ENVA
$4.27B
| $274K | ﹤0.01% |
2,018
-10,452
| -84% | -$1.56M |
2025 Q2
3 quarters
|
|
|
APLS
3923
PUT
DELISTED
Apellis Pharmaceuticals
APLS
| $274K | ﹤0.01% |
6,800
-37,500
| -85% | -$808K |
2021 Q1
20 quarters
|
|
|
SRTA
3924
CALL
Strata Critical Medical Inc
SRTA
$427M
| $273K | ﹤0.01% |
65,400
+44,300
| +210% | +$213K |
2024 Q3
6 quarters
|
|
3925
CALL
Syndax Pharmaceuticals
SNDX
$1.63B
| $273K | ﹤0.01% |
11,700
-45,300
| -79% | -$984K |
2018 Q3
30 quarters
|
|
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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.