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 | |
|---|---|---|---|---|---|---|
2176
PUT
NextDecade
NEXT
$1.62B
| $1.36M | ﹤0.01% |
177,800
+126,300
| +245% | +$718K |
|
|
BCPC
2177
Balchem Corp
BCPC
$5.38B
| $1.36M | ﹤0.01% |
+8,029
| New | +$1.36M |
|
2178
CALL
NewAmsterdam Pharma
NAMS
$3.28B
| $1.36M | ﹤0.01% |
42,500
-1,500
| -3% | -$48.9K |
|
2179
CALL
Lincoln Educational Services
LINC
$1.3B
| $1.36M | ﹤0.01% |
33,400
+27,700
| +486% | +$872K |
|
2180
PUT
International Paper
IP
$23.4B
| $1.36M | ﹤0.01% |
38,000
-4,400
| -10% | -$183K |
|
2181
PUT
Valley National Bancorp
VLY
$8.01B
| $1.36M | ﹤0.01% |
110,400
-20,900
| -16% | -$260K |
|
2182
CALL
Ball Corp
BALL
$17.7B
| $1.35M | ﹤0.01% |
22,900
-54,800
| -71% | -$3.33M |
|
|
SUPV
2183
PUT
Grupo Supervielle
SUPV
$825M
| $1.35M | ﹤0.01% |
143,500
-10,800
| -7% | -$111K |
|
2184
CSX Corp
CSX
$95.6B
| $1.35M | ﹤0.01% |
+32,947
| New | +$1.29M |
|
|
VTEL
2185
CALL
Vanguard Long-Term Tax-Exempt Bond ETF
VTEL
$282M
| $1.35M | ﹤0.01% |
27,100
+25,100
| +1,255% | +$2.61M |
|
2186
CALL
Organon & Co
OGN
$3.56B
| $1.35M | ﹤0.01% |
225,500
+10,600
| +5% | +$79.8K |
|
|
EU
2187
CALL
enCore Energy
EU
$225M
| $1.35M | ﹤0.01% |
749,600
+333,300
| +80% | +$852K |
|
|
GRAL
2188
CALL
GRAIL Inc
GRAL
$2.8B
| $1.35M | ﹤0.01% |
26,100
-17,800
| -41% | -$1.38M |
|
2189
CALL
Workiva
WK
$3.31B
| $1.35M | ﹤0.01% |
22,600
+22,500
| +22,500% | +$1.57M |
|
2190
ProShares K-1 Free Crude Oil Strategy ETF
OILK
$198M
| $1.35M | ﹤0.01% |
+24,906
| New | +$1.11M |
|
2191
CALL
Maximus
MMS
$3.31B
| $1.35M | ﹤0.01% |
21,000
| – | – |
|
2192
PUT
Main Street Capital
MAIN
$5.09B
| $1.35M | ﹤0.01% |
25,400
-26,200
| -51% | -$1.55M |
|
|
PONY
2193
CALL
Pony AI Inc
PONY
$3.29B
| $1.34M | ﹤0.01% |
142,200
-110,900
| -44% | -$1.53M |
|
2194
IonQ
IONQ
$12.6B
| $1.34M | ﹤0.01% |
46,557
+43,076
| +1,237% | +$1.65M |
|
2195
CALL
Tractor Supply
TSCO
$16.7B
| $1.34M | ﹤0.01% |
29,600
-52,700
| -64% | -$2.69M |
|
2196
CALL
Ouster
OUST
$2.24B
| $1.34M | ﹤0.01% |
72,900
-46,800
| -39% | -$1.02M |
|
2197
CALL
GXO Logistics
GXO
$6.15B
| $1.34M | ﹤0.01% |
25,800
-42,800
| -62% | -$2.45M |
|
2198
iShares iBoxx $ High Yield Corporate Bond ETF
HYG
$15.9B
| $1.34M | ﹤0.01% |
16,805
-13,542
| -45% | -$1.09M |
|
2199
CALL
Banco Santander
SAN
$199B
| $1.34M | ﹤0.01% |
118,400
+6,000
| +5% | +$71.5K |
|
2200
CALL
Travel + Leisure Co
TNL
$4.75B
| $1.34M | ﹤0.01% |
19,300
-2,200
| -10% | -$159K |
|
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.