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 | |
|---|---|---|---|---|---|---|
2751
CALL
Nordic American Tanker
NAT
$1.36B
| $779K | ﹤0.01% |
+132,900
| New | +$629K |
|
2752
PUT
XPO
XPO
$23.4B
| $778K | ﹤0.01% |
4,000
-6,000
| -60% | -$1.08M |
|
2753
CALL
PennyMac Financial
PFSI
$4.47B
| $778K | ﹤0.01% |
8,900
-1,100
| -11% | -$118K |
|
|
DFTX
2754
Definium Therapeutics
DFTX
$5.6B
| $778K | ﹤0.01% |
41,156
-7,070
| -15% | -$120K |
|
2755
CALL
Cooper-Standard Automotive
CPS
$517M
| $778K | ﹤0.01% |
27,900
+9,200
| +49% | +$308K |
|
2756
PUT
Globalstar
GSAT
$10.1B
| $777K | ﹤0.01% |
11,700
-83,400
| -88% | -$5.09M |
|
2757
Chevron
CVX
$382B
| $776K | ﹤0.01% |
3,750
-31,625
| -89% | -$5.77M |
|
2758
PUT
Progressive
PGR
$128B
| $773K | ﹤0.01% |
3,900
-37,900
| -91% | -$7.82M |
|
2759
Payoneer
PAYO
$2.41B
| $772K | ﹤0.01% |
159,907
+80,665
| +102% | +$425K |
|
2760
CALL
Yext
YEXT
$573M
| $772K | ﹤0.01% |
201,000
+119,900
| +148% | +$721K |
|
2761
CALL
Delek Logistics
DKL
$3.12B
| $771K | ﹤0.01% |
15,500
+11,500
| +288% | +$592K |
|
2762
PUT
Welltower
WELL
$174B
| $771K | ﹤0.01% |
3,900
-46,300
| -92% | -$9.15M |
|
2763
CALL
Phunware
PHUN
$42.9M
| $771K | ﹤0.01% |
435,500
+428,300
| +5,949% | +$777K |
|
2764
CALL
Eton Pharmaceutcials
ETON
$1.32B
| $770K | ﹤0.01% |
31,200
+23,200
| +290% | +$406K |
|
2765
CALL
Consolidated Edison
ED
$41.4B
| $770K | ﹤0.01% |
6,800
-19,300
| -74% | -$2.09M |
|
2766
PUT
PPG Industries
PPG
$24.9B
| $770K | ﹤0.01% |
7,200
-8,800
| -55% | -$998K |
|
2767
CALL
Ramaco Resources Class A
METC
$629M
| $768K | ﹤0.01% |
49,700
-77,600
| -61% | -$1.38M |
|
2768
PUT
Arch Capital
ACGL
$35.7B
| $768K | ﹤0.01% |
8,000
-12,700
| -61% | -$1.22M |
|
2769
PUT
dLocal
DLO
$4.29B
| $768K | ﹤0.01% |
59,200
-15,700
| -21% | -$205K |
|
|
SOLT
2770
PUT
2x Solana ETF
SOLT
$111M
| $766K | ﹤0.01% |
+16,900
| New | +$1.4M |
|
|
SII
2771
Sprott
SII
$2.68B
| $766K | ﹤0.01% |
+5,360
| New | +$717K |
|
|
PPTA
2772
CALL
Perpetua Resources
PPTA
$2.16B
| $765K | ﹤0.01% |
27,200
-73,100
| -73% | -$2.21M |
|
2773
PUT
Vermilion Energy
VET
$1.66B
| $765K | ﹤0.01% |
55,500
-1,700
| -3% | -$18K |
|
2774
Viking Holdings
VIK
$45.8B
| $765K | ﹤0.01% |
10,406
-771
| -7% | -$56.3K |
|
2775
T-Rex 2X Long NVIDIA Daily Target ETF
NVDX
$391M
| $764K | ﹤0.01% |
54,821
-23,077
| -30% | -$371K |
|
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.