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 | |
|---|---|---|---|---|---|---|
|
BCYC
2676
PUT
Bicycle Therapeutics
BCYC
$269M
| $854K | ﹤0.01% |
184,000
+173,000
| +1,573% | +$989K |
|
2677
-1x Short VIX Futures ETF
SVIX
$159M
| $853K | ﹤0.01% |
54,277
+13,381
| +33% | +$279K |
|
2678
Home Depot
HD
$337B
| $850K | ﹤0.01% |
2,585
-21,727
| -89% | -$7.92M |
|
2679
CALL
Cheesecake Factory
CAKE
$5.03B
| $849K | ﹤0.01% |
15,500
-10,200
| -40% | -$608K |
|
2680
CALL
ODDITY Tech
ODD
$690M
| $848K | ﹤0.01% |
63,400
+53,200
| +522% | +$1.33M |
|
2681
PUT
Match Group
MTCH
$9.19B
| $848K | ﹤0.01% |
27,600
-22,200
| -45% | -$692K |
|
2682
CALL
Rapid7
RPD
$628M
| $846K | ﹤0.01% |
153,600
+72,400
| +89% | +$665K |
|
2683
PUT
Polaris
PII
$3.83B
| $845K | ﹤0.01% |
15,500
-45,700
| -75% | -$2.86M |
|
2684
PUT
Air Products & Chemicals
APD
$65.5B
| $842K | ﹤0.01% |
2,900
-3,900
| -57% | -$1.08M |
|
2685
PUT
Xcel Energy
XEL
$49.2B
| $842K | ﹤0.01% |
10,600
-36,200
| -77% | -$2.84M |
|
2686
CALL
Larimar Therapeutics
LRMR
$377M
| $841K | ﹤0.01% |
186,900
+175,300
| +1,511% | +$701K |
|
2687
Capri Holdings
CPRI
$1.82B
| $841K | ﹤0.01% |
47,702
-3,149
| -6% | -$66.6K |
|
|
TEN
2688
PUT
Tsakos Energy Navigation Ltd
TEN
$1.19B
| $840K | ﹤0.01% |
+21,300
| New | +$653K |
|
2689
SiriusXM
SIRI
$11B
| $838K | ﹤0.01% |
36,316
-79,411
| -69% | -$1.71M |
|
2690
CALL
Aehr Test Systems
AEHR
$2.13B
| $838K | ﹤0.01% |
22,600
-232,500
| -91% | -$7.44M |
|
2691
CALL
Sana Biotechnology
SANA
$882M
| $837K | ﹤0.01% |
290,700
+142,500
| +96% | +$561K |
|
2692
CALL
The Oncology Institute
TOI
$477M
| $833K | ﹤0.01% |
271,400
-129,800
| -32% | -$398K |
|
2693
Direxion Daily FTSE China Bull 3X ETF
YINN
$758M
| $832K | ﹤0.01% |
25,353
-46,308
| -65% | -$1.89M |
|
|
KYIV
2694
CALL
Kyivstar Group
KYIV
$3.03B
| $831K | ﹤0.01% |
82,100
+1,100
| +1% | +$13K |
|
2695
CALL
iShares 0-5 Year Investment Grade Corporate Bond ETF
SLQD
$2.37B
| $830K | ﹤0.01% |
13,000
+12,100
| +1,344% | +$613K |
|
2696
PUT
Triumph Financial Inc
TFIN
$1.81B
| $829K | ﹤0.01% |
13,900
-1,200
| -8% | -$75K |
|
|
SII
2697
PUT
Sprott
SII
$2.68B
| $829K | ﹤0.01% |
5,800
+3,900
| +205% | +$522K |
|
2698
CALL
Cabot Corp
CBT
$4.72B
| $828K | ﹤0.01% |
11,000
+10,500
| +2,100% | +$762K |
|
2699
Alerian MLP ETF
AMLP
$12.9B
| $823K | ﹤0.01% |
15,637
+8,176
| +110% | +$416K |
|
2700
CALL
Quest Diagnostics
DGX
$26B
| $823K | ﹤0.01% |
4,200
+1,200
| +40% | +$233K |
|
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.