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 | |
|---|---|---|---|---|---|---|
5051
PUT
Apple Hospitality REIT
APLE
$3.96B
| $102K | ﹤0.01% |
8,900
+2,100
| +31% | +$25.4K |
|
5052
ArcBest
ARCB
$3.44B
| $102K | ﹤0.01% |
1,041
+668
| +179% | +$63.3K |
|
5053
PUT
American Public Education
APEI
$875M
| $102K | ﹤0.01% |
1,800
+1,500
| +500% | +$68.7K |
|
5054
PUT
BWX Technologies
BWXT
$16B
| $102K | ﹤0.01% |
500
-11,000
| -96% | -$2.23M |
|
5055
Construction Partners
ROAD
$5.84B
| $102K | ﹤0.01% |
+918
| New | +$110K |
|
5056
CALL
TaskUs
TASK
$506M
| $102K | ﹤0.01% |
15,200
+5,400
| +55% | +$57.1K |
|
5057
Delek US
DK
$3.87B
| $102K | ﹤0.01% |
2,262
-15,818
| -87% | -$565K |
|
|
NMG
5058
CALL
Nouveau Monde Graphite
NMG
$415M
| $102K | ﹤0.01% |
45,500
+44,600
| +4,956% | +$109K |
|
5059
CALL
Deluxe
DLX
$1.19B
| $102K | ﹤0.01% |
3,700
+100
| +3% | +$2.62K |
|
5060
CALL
Brunswick
BC
$5.19B
| $102K | ﹤0.01% |
1,400
+800
| +133% | +$64.5K |
|
|
ABX
5061
CALL
Abacus Global Management
ABX
$996M
| $102K | ﹤0.01% |
12,900
+7,900
| +158% | +$68.5K |
|
5062
CALL
Box
BOX
$4.02B
| $102K | ﹤0.01% |
4,300
-65,800
| -94% | -$1.66M |
|
5063
PUT
Root
ROOT
$917M
| $102K | ﹤0.01% |
2,300
-9,000
| -80% | -$525K |
|
5064
CALL
Fresenius Medical Care
FMS
$13.2B
| $102K | ﹤0.01% |
4,500
+1,800
| +67% | +$41.3K |
|
5065
CALL
XBiotech
XBIT
$69.2M
| $102K | ﹤0.01% |
43,200
+42,700
| +8,540% | +$103K |
|
5066
Energy Recovery
ERII
$434M
| $102K | ﹤0.01% |
10,080
+9,779
| +3,249% | +$128K |
|
5067
Gulfport Energy Corp
GPOR
$2.83B
| $101K | ﹤0.01% |
479
+60
| +14% | +$11.9K |
|
5068
PUT
EVgo
EVGO
$200M
| $101K | ﹤0.01% |
58,900
-30,000
| -34% | -$80.2K |
|
5069
CALL
Nuvation Bio
NUVB
$2.24B
| $101K | ﹤0.01% |
23,600
-156,100
| -87% | -$870K |
|
|
5070
PUT
Nuvation Bio
NUVB
$2.24B
| $101K | ﹤0.01% |
23,600
-210,000
| -90% | -$1.17M |
|
5071
PUT
Vertical Aerospace
EVTL
$176M
| $101K | ﹤0.01% |
45,800
+36,200
| +377% | +$165K |
|
|
MIAX
5072
CALL
Miami International Holdings
MIAX
$4.14B
| $101K | ﹤0.01% |
2,600
+2,200
| +550% | +$90.6K |
|
5073
PUT
AdaptHealth
AHCO
$1.46B
| $101K | ﹤0.01% |
8,500
-16,600
| -66% | -$170K |
|
|
TUZ
5074
CALL
DELISTED
PIMCO 1-3 Year U.S. Treasury Index Exchange-Traded Fund
TUZ
| $101K | ﹤0.01% |
1,600
+1,100
| +220% | +$69.5K |
|
5075
Tradr 2X Long Innovation ETF
TARK
$14.9M
| $101K | ﹤0.01% |
+2,868
| New | +$126K |
|
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.