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 | Technology | 0.62% |
| 2 | Communication Services | 0.22% |
| 3 | Consumer Discretionary | 0.21% |
| 4 | Healthcare | 0.2% |
| 5 | Industrials | 0.1% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
876
PUT
Ares Capital
ARCC
$13.5B
| $7.05M | ﹤0.01% |
391,100
+104,200
| +36% | +$2.02M |
|
877
CALL
Steel Dynamics
STLD
$35.6B
| $7.04M | ﹤0.01% |
39,100
+300
| +0.8% | +$54.6K |
|
878
CALL
Lemonade
LMND
$4.62B
| $7.03M | ﹤0.01% |
112,100
-86,200
| -43% | -$5.97M |
|
|
KOCG
879
CALL
DELISTED
FIS Knights of Columbus Global Belief ETF
KOCG
| $7.02M | ﹤0.01% |
144,000
+85,400
| +146% | +$4.16M |
|
880
CALL
Truist Financial
TFC
$63.2B
| $7.02M | ﹤0.01% |
152,700
-138,100
| -47% | -$6.82M |
|
881
PUT
Wheaton Precious Metals
WPM
$50.6B
| $7.01M | ﹤0.01% |
+53,500
| New | +$7.44M |
|
882
PUT
Southern Copper
SCCO
$141B
| $7M | ﹤0.01% |
41,107
+11,059
| +37% | +$2.02M |
|
883
CALL
Shift4
FOUR
$3.84B
| $7M | ﹤0.01% |
160,100
+28,600
| +22% | +$1.58M |
|
884
CALL
Samsara
IOT
$19.3B
| $7M | ﹤0.01% |
220,900
-86,000
| -28% | -$2.63M |
|
885
PUT
AngloGold Ashanti
AU
$40.3B
| $7M | ﹤0.01% |
71,900
+19,400
| +37% | +$1.99M |
|
886
PUT
AGNC Investment
AGNC
$12.3B
| $7M | ﹤0.01% |
697,900
-192,800
| -22% | -$2.13M |
|
887
PUT
Suncor Energy
SU
$77.7B
| $6.99M | ﹤0.01% |
105,800
-27,300
| -21% | -$1.51M |
|
888
Analog Devices
ADI
$181B
| $6.98M | ﹤0.01% |
21,951
+18,665
| +568% | +$5.94M |
|
889
PUT
HP
HPQ
$23.5B
| $6.97M | ﹤0.01% |
362,900
+97,100
| +37% | +$1.89M |
|
890
PUT
Coeur Mining
CDE
$15.6B
| $6.96M | ﹤0.01% |
370,700
+55,000
| +17% | +$1.2M |
|
891
PUT
Noble Corp
NE
$6.9B
| $6.93M | ﹤0.01% |
141,200
-87,200
| -38% | -$3.56M |
|
892
CALL
3M
MMM
$89B
| $6.93M | ﹤0.01% |
47,700
-18,500
| -28% | -$2.95M |
|
893
PUT
Trump Media & Technology Group
DJT
$2.37B
| $6.9M | ﹤0.01% |
+743,200
| New | +$8.54M |
|
894
CALL
Advanced Energy
AEIS
$12.2B
| $6.87M | ﹤0.01% |
21,300
+12,000
| +129% | +$3.48M |
|
895
PUT
Monster Beverage
MNST
$91.4B
| $6.85M | ﹤0.01% |
94,600
-24,400
| -21% | -$1.92M |
|
896
PUT
Simon Property Group
SPG
$74.5B
| $6.85M | ﹤0.01% |
36,700
-6,400
| -15% | -$1.22M |
|
897
CALL
Atlassian
TEAM
$22B
| $6.83M | ﹤0.01% |
100,100
+14,200
| +17% | +$1.4M |
|
898
CALL
Wayfair
W
$11.1B
| $6.83M | ﹤0.01% |
90,800
-8,200
| -8% | -$742K |
|
899
CALL
Ascendis Pharma A/S
ASND
$16.7B
| $6.82M | ﹤0.01% |
29,800
-7,300
| -20% | -$1.64M |
|
900
CALL
Archer Aviation
ACHR
$3.64B
| $6.81M | ﹤0.01% |
1,317,600
-1,425,500
| -52% | -$10.2M |
|
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 withdrew a net $18.1B in Q1 2026, closing 1,574 positions and reducing 3,926 holdings. Its most notable exit was Direxion Daily Semiconductor Bull 3X ETF, an estimated $52M position sold in full.
By sector, the portfolio is most concentrated in Technology at 0.62% of assets, up from 0.59% a quarter earlier, followed by Communication Services and Consumer Discretionary.
Against the trend, Simplex Trading opened a new position in Amazon worth $159M.
- 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 2,156 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.