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 | |
|---|---|---|---|---|---|---|
3026
PUT
Lightwave Logic
LWLG
$823M
| $620K | ﹤0.01% |
88,200
-34,800
| -28% | -$165K |
|
3027
CALL
IES Holdings
IESC
$9.89B
| $619K | ﹤0.01% |
1,300
+400
| +44% | +$183K |
|
3028
CALL
BGC Group
BGC
$5.64B
| $619K | ﹤0.01% |
63,300
+3,600
| +6% | +$33.3K |
|
3029
Enovis
ENOV
$1.74B
| $619K | ﹤0.01% |
27,193
+13,534
| +99% | +$320K |
|
3030
Prairie Operating Co
PROP
$68.4M
| $618K | ﹤0.01% |
304,286
+303,599
| +44,192% | +$548K |
|
3031
PUT
Harrow
HROW
$1.44B
| $617K | ﹤0.01% |
17,500
-1,900
| -10% | -$83.5K |
|
3032
CALL
PubMatic
PUBM
$608M
| $617K | ﹤0.01% |
75,400
-32,300
| -30% | -$248K |
|
|
PEW
3033
CALL
GrabAGun Digital Holdings
PEW
$72.6M
| $616K | ﹤0.01% |
204,800
-57,100
| -22% | -$173K |
|
|
KRMN
3034
CALL
Karman Holdings
KRMN
$6.04B
| $616K | ﹤0.01% |
7,700
+6,900
| +863% | +$665K |
|
3035
CALL
Kayne Anderson Energy Infrastructure Fund
KYN
$2.42B
| $615K | ﹤0.01% |
+43,100
| New | +$579K |
|
3036
Protolabs
PRLB
$1.7B
| $615K | ﹤0.01% |
+10,779
| New | +$625K |
|
|
INV
3037
CALL
Innventure Inc
INV
$237M
| $614K | ﹤0.01% |
157,100
+156,700
| +39,175% | +$554K |
|
3038
ProShares UltraShort QQQ
QID
$305M
| $609K | ﹤0.01% |
26,896
+3,557
| +15% | +$73.8K |
|
3039
CALL
EPAM Systems
EPAM
$5.58B
| $609K | ﹤0.01% |
4,500
-100
| -2% | -$17.1K |
|
3040
CALL
CVR Energy
CVI
$3.48B
| $609K | ﹤0.01% |
18,100
+17,000
| +1,545% | +$437K |
|
3041
CALL
Jones Lang LaSalle
JLL
$15.8B
| $609K | ﹤0.01% |
2,000
-100
| -5% | -$32.3K |
|
3042
CALL
Hamilton Insurance Group
HG
$3.63B
| $609K | ﹤0.01% |
+20,400
| New | +$587K |
|
3043
CALL
Portillo's
PTLO
$345M
| $608K | ﹤0.01% |
115,000
-87,700
| -43% | -$477K |
|
|
SLNO
3044
DELISTED
Soleno Therapeutics
SLNO
| $608K | ﹤0.01% |
18,166
-30,942
| -63% | -$1.21M |
|
3045
NiSource
NI
$21.5B
| $608K | ﹤0.01% |
13,027
-1,272
| -9% | -$57.3K |
|
3046
CALL
BRC Group Holdings
RILY
$264M
| $608K | ﹤0.01% |
83,000
-12,700
| -13% | -$94.7K |
|
3047
PUT
Westlake Corp
WLK
$9.26B
| $607K | ﹤0.01% |
5,200
+1,600
| +44% | +$155K |
|
3048
ProShares VIX Short-Term Futures ETF
VIXY
$221M
| $607K | ﹤0.01% |
17,683
+17,409
| +6,354% | +$501K |
|
3049
PUT
Invesco Equal Weight 0-30 Year Treasury ETF
GOVI
$1.22B
| $607K | ﹤0.01% |
+16,800
| New | +$464K |
|
|
DFDV
3050
PUT
DeFi Development Corp
DFDV
$77.4M
| $606K | ﹤0.01% |
237,300
-13,900
| -6% | -$66.9K |
|
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.