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 | |
|---|---|---|---|---|---|---|
|
MRSH
2301
CALL
Marsh
MRSH
$91.7B
| $1.21M | ﹤0.01% |
7,000
-5,100
| -42% | -$917K |
|
2302
CALL
Jazz Pharmaceuticals
JAZZ
$16.1B
| $1.21M | ﹤0.01% |
6,400
-9,700
| -60% | -$1.7M |
|
2303
CALL
Incyte
INCY
$26B
| $1.2M | ﹤0.01% |
12,800
-18,800
| -59% | -$1.88M |
|
|
FIG
2304
Figma
FIG
$12.9B
| $1.2M | ﹤0.01% |
56,894
+12,182
| +27% | +$334K |
|
2305
CALL
Aptiv
APTV
$12.6B
| $1.2M | ﹤0.01% |
17,300
-28,300
| -62% | -$2.18M |
|
2306
JB Hunt Transport Services
JBHT
$26.1B
| $1.2M | ﹤0.01% |
5,667
+74
| +1% | +$15.8K |
|
2307
PUT
Kosmos Energy
KOS
$1.39B
| $1.2M | ﹤0.01% |
431,100
+182,600
| +73% | +$343K |
|
2308
PUT
Sigma Lithium
SGML
$1.06B
| $1.2M | ﹤0.01% |
97,100
+36,000
| +59% | +$460K |
|
|
BLSH
2309
PUT
Bullish
BLSH
$3.44B
| $1.2M | ﹤0.01% |
33,500
-13,900
| -29% | -$487K |
|
2310
CALL
SL Green Realty
SLG
$3.77B
| $1.2M | ﹤0.01% |
32,400
-52,600
| -62% | -$2.19M |
|
2311
PUT
Yum China
YUMC
$15.6B
| $1.19M | ﹤0.01% |
24,400
-5,400
| -18% | -$280K |
|
2312
CALL
Vanguard S&P 500 Growth ETF
VOOG
$25.2B
| $1.18M | ﹤0.01% |
21,600
-10,200
| -32% | -$738K |
|
2313
Viper Energy
VNOM
$8.21B
| $1.18M | ﹤0.01% |
25,146
+24,452
| +3,523% | +$1.05M |
|
2314
PUT
Citizens Financial Group
CFG
$30.8B
| $1.18M | ﹤0.01% |
19,700
-31,400
| -61% | -$1.93M |
|
2315
CALL
Harmony Gold Mining
HMY
$9.7B
| $1.18M | ﹤0.01% |
76,800
-10,800
| -12% | -$213K |
|
2316
CALL
Phathom Pharmaceuticals
PHAT
$930M
| $1.18M | ﹤0.01% |
106,200
-66,100
| -38% | -$835K |
|
2317
PUT
Tidewater
TDW
$3.71B
| $1.18M | ﹤0.01% |
14,100
-81,000
| -85% | -$5.63M |
|
|
PPLC
2318
PUT
DELISTED
PortfolioPlus S&P 500 ETF
PPLC
| $1.18M | ﹤0.01% |
31,000
-17,600
| -36% | -$668K |
|
|
KNGS
2319
CALL
DELISTED
Roundhill S&P Dividend Monarchs ETF
KNGS
| $1.18M | ﹤0.01% |
40,200
-82,500
| -67% | -$2.41M |
|
2320
PUT
Denali Therapeutics
DNLI
$3.82B
| $1.17M | ﹤0.01% |
61,100
+60,700
| +15,175% | +$1.21M |
|
2321
PUT
American Conservative Values ETF
ACVF
$150M
| $1.17M | ﹤0.01% |
110,100
-140,800
| -56% | -$6.97M |
|
2322
PUT
Baxter International
BAX
$12.6B
| $1.17M | ﹤0.01% |
69,800
+8,100
| +13% | +$157K |
|
2323
Rocket Companies
RKT
$39.6B
| $1.17M | ﹤0.01% |
+82,169
| New | +$1.49M |
|
2324
CALL
Boot Barn
BOOT
$4.81B
| $1.17M | ﹤0.01% |
8,000
+4,500
| +129% | +$816K |
|
2325
PUT
Kimco Realty
KIM
$17.7B
| $1.17M | ﹤0.01% |
52,100
+28,300
| +119% | +$624K |
|
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.