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 | |
|---|---|---|---|---|---|---|
3001
CALL
Construction Partners
ROAD
$5.88B
| $633K | ﹤0.01% |
5,700
+3,800
| +200% | +$456K |
|
3002
Direxion Daily Gold Miners Index Bear 2X ETF
DUST
$72.4M
| $633K | ﹤0.01% |
+12,411
| New | +$643K |
|
3003
Liberty Global Class A
LBTYA
$3.59B
| $632K | ﹤0.01% |
52,285
+42,113
| +414% | +$490K |
|
3004
CALL
Blue Owl Capital
OBDC
$5.35B
| $632K | ﹤0.01% |
+57,100
| New | +$670K |
|
3005
BlackBerry
BB
$4.58B
| $631K | ﹤0.01% |
194,764
+182,696
| +1,514% | +$646K |
|
3006
PUT
MoonLake Immunotherapeutics
MLTX
$1.56B
| $630K | ﹤0.01% |
33,800
+700
| +2% | +$11.6K |
|
3007
PUT
Imperial Petroleum
IMPP
$212M
| $630K | ﹤0.01% |
147,100
-49,300
| -25% | -$197K |
|
3008
RBC Bearings
RBC
$17.4B
| $629K | ﹤0.01% |
1,158
+998
| +624% | +$530K |
|
3009
HEICO Corp
HEI
$49.6B
| $629K | ﹤0.01% |
+2,293
| New | +$738K |
|
|
DEA
3010
CALL
Easterly Government Properties
DEA
$1.16B
| $628K | ﹤0.01% |
29,300
-2,400
| -8% | -$54.8K |
|
3011
CALL
Alignment Healthcare
ALHC
$3.78B
| $627K | ﹤0.01% |
35,600
-240,100
| -87% | -$4.82M |
|
3012
PUT
SM Energy
SM
$7.6B
| $627K | ﹤0.01% |
20,100
-11,800
| -37% | -$269K |
|
3013
Distribution Solutions Group
DSGR
$1.6B
| $627K | ﹤0.01% |
+23,878
| New | +$668K |
|
3014
Vornado Realty Trust
VNO
$7.65B
| $626K | ﹤0.01% |
+24,089
| New | +$713K |
|
3015
Vertex Pharmaceuticals
VRTX
$123B
| $626K | ﹤0.01% |
1,401
-2,110
| -60% | -$984K |
|
3016
Vanguard Real Estate ETF
VNQ
$39.9B
| $625K | ﹤0.01% |
7,047
-6,697
| -49% | -$614K |
|
3017
CALL
Silicon Laboratories
SLAB
$7.14B
| $624K | ﹤0.01% |
+3,000
| New | +$550K |
|
3018
Host Hotels & Resorts
HST
$17.5B
| $624K | ﹤0.01% |
+32,560
| New | +$621K |
|
3019
CALL
AMN Healthcare
AMN
$1.35B
| $624K | ﹤0.01% |
34,000
+26,200
| +336% | +$498K |
|
3020
CALL
Altimmune
ALT
$568M
| $623K | ﹤0.01% |
202,400
-174,400
| -46% | -$740K |
|
3021
Zimmer Biomet
ZBH
$18.8B
| $623K | ﹤0.01% |
+6,887
| New | +$632K |
|
3022
CALL
Lincoln Electric
LECO
$14.1B
| $623K | ﹤0.01% |
2,500
+900
| +56% | +$241K |
|
|
AMRZ
3023
CALL
Amrize Ltd
AMRZ
$27.4B
| $622K | ﹤0.01% |
11,100
-5,800
| -34% | -$333K |
|
|
GTLS
3024
PUT
DELISTED
Chart Industries
GTLS
| $620K | ﹤0.01% |
3,000
+1,300
| +76% | +$269K |
|
3025
Dr. Reddy's Laboratories
RDY
$9.8B
| $620K | ﹤0.01% |
+44,776
| New | +$623K |
|
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.