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 | |
|---|---|---|---|---|---|---|
801
PUT
Toronto Dominion Bank
TD
$197B
| $8.16M | 0.01% |
87,400
+12,000
| +16% | +$1.14M |
|
802
CALL
Royal Bank of Canada
RY
$290B
| $8.12M | 0.01% |
50,200
+33,500
| +201% | +$5.6M |
|
803
CALL
The GEO Group
GEO
$4.12B
| $8.11M | 0.01% |
482,500
-524,200
| -52% | -$8.33M |
|
804
CALL
Equinor
EQNR
$96B
| $8.07M | 0.01% |
191,300
+73,400
| +62% | +$2.21M |
|
805
CALL
On Holding
ONON
$12B
| $8.06M | 0.01% |
237,000
-158,800
| -40% | -$6.93M |
|
806
CALL
Advance Auto Parts
AAP
$3.35B
| $8.05M | 0.01% |
152,600
-22,600
| -13% | -$1.13M |
|
807
PUT
Gilead Sciences
GILD
$161B
| $8M | 0.01% |
57,400
-100,700
| -64% | -$14.1M |
|
808
PUT
Pinterest
PINS
$12.5B
| $8M | 0.01% |
436,000
-351,700
| -45% | -$7.34M |
|
809
PUT
Prologis
PLD
$137B
| $7.94M | 0.01% |
60,100
+200
| +0.3% | +$26.7K |
|
810
PUT
DexCom
DXCM
$27.6B
| $7.94M | 0.01% |
126,400
-61,400
| -33% | -$4.28M |
|
811
Snap
SNAP
$7.33B
| $7.92M | 0.01% |
1,722,466
+195,040
| +13% | +$1.15M |
|
812
PUT
ClearShares Piton Intermediate Fixed Income ETF
PIFI
$97.5M
| $7.92M | 0.01% |
317,000
-5,900
| -2% | -$561K |
|
813
PUT
Danaher
DHR
$135B
| $7.91M | 0.01% |
41,700
-67,300
| -62% | -$14.3M |
|
814
CALL
Toast
TOST
$16.9B
| $7.87M | 0.01% |
296,900
-65,500
| -18% | -$1.95M |
|
815
CALL
CSX Corp
CSX
$98.7B
| $7.84M | 0.01% |
191,100
-209,500
| -52% | -$8.21M |
|
816
CALL
Amprius Technologies
AMPX
$1.32B
| $7.84M | 0.01% |
464,800
-47,000
| -9% | -$613K |
|
817
CALL
Brown & Brown
BRO
$22.9B
| $7.83M | 0.01% |
120,100
+118,400
| +6,965% | +$8.53M |
|
818
PUT
Canadian Pacific Kansas City
CP
$82.1B
| $7.83M | 0.01% |
+99,500
| New | +$7.86M |
|
819
PUT
Kraft Heinz
KHC
$30.4B
| $7.82M | 0.01% |
347,900
-361,500
| -51% | -$8.5M |
|
820
PUT
Automatic Data Processing
ADP
$100B
| $7.78M | 0.01% |
+38,300
| New | +$8.78M |
|
821
CALL
NXP Semiconductors
NXPI
$67.8B
| $7.78M | 0.01% |
39,500
-17,300
| -30% | -$3.83M |
|
822
CALL
General Dynamics
GD
$104B
| $7.76M | 0.01% |
22,600
-25,900
| -53% | -$9.19M |
|
823
CALL
Motorola Solutions
MSI
$69B
| $7.72M | 0.01% |
17,800
+2,200
| +14% | +$952K |
|
824
PUT
Unity
U
$12.6B
| $7.69M | 0.01% |
350,300
-553,400
| -61% | -$15.4M |
|
825
CALL
Dollar Tree
DLTR
$23.3B
| $7.67M | 0.01% |
70,000
-140,800
| -67% | -$17.2M |
|
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.