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 | Miscellaneous | 98.3% |
| 2 | Technology | 0.62% |
| 3 | Communication Services | 0.22% |
| 4 | Consumer Discretionary | 0.21% |
| 5 | Healthcare | 0.2% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2251
PUT
Papa John's
PZZA
$648M
| $1.27M | ﹤0.01% |
39,100
-22,400
| -36% | -$778K |
|
2252
CALL
Tyler Technologies
TYL
$13.1B
| $1.27M | ﹤0.01% |
+3,700
| New | +$1.38M |
|
2253
VanEck Rare Earth/Strategic Metals ETF
REMX
$1.85B
| $1.27M | ﹤0.01% |
14,387
-2,947
| -17% | -$265K |
|
2254
CALL
Ingersoll Rand
IR
$29.5B
| $1.27M | ﹤0.01% |
15,800
-15,900
| -50% | -$1.4M |
|
|
ARI
2255
Apollo Commercial Real Estate
ARI
$802M
| $1.26M | ﹤0.01% |
+119,664
| New | +$1.25M |
|
2256
CALL
Mettler-Toledo International
MTD
$30.5B
| $1.26M | ﹤0.01% |
+1,000
| New | +$1.35M |
|
|
SPYM
2257
State Street SPDR Portfolio S&P 500 ETF
SPYM
$175B
| $1.26M | ﹤0.01% |
+16,469
| New | +$1.32M |
|
2258
Diageo
DEO
$47.7B
| $1.26M | ﹤0.01% |
16,925
+3,144
| +23% | +$274K |
|
2259
Fastenal
FAST
$57.1B
| $1.26M | ﹤0.01% |
27,145
-21,305
| -44% | -$956K |
|
2260
Natural Gas Services Group
NGS
$414M
| $1.26M | ﹤0.01% |
33,348
+20,916
| +168% | +$765K |
|
2261
PUT
Portillo's
PTLO
$257M
| $1.26M | ﹤0.01% |
237,900
+89,100
| +60% | +$485K |
|
2262
PUT
H.B. Fuller
FUL
$2.65B
| $1.26M | ﹤0.01% |
20,400
+2,300
| +13% | +$141K |
|
2263
PUT
Algoma Steel
ASTL
$445M
| $1.26M | ﹤0.01% |
304,400
-7,700
| -2% | -$33.4K |
|
2264
Ferrari
RACE
$69.1B
| $1.26M | ﹤0.01% |
3,710
+574
| +18% | +$201K |
|
2265
PUT
ING
ING
$101B
| $1.26M | ﹤0.01% |
48,200
+8,000
| +20% | +$225K |
|
2266
PUT
MasTec
MTZ
$17.3B
| $1.25M | ﹤0.01% |
3,900
+1,200
| +44% | +$325K |
|
2267
PUT
The RealReal
REAL
$1.07B
| $1.25M | ﹤0.01% |
137,800
-2,300
| -2% | -$29.1K |
|
2268
CALL
OR Royalties Inc
OR
$6.47B
| $1.25M | ﹤0.01% |
32,900
-26,900
| -45% | -$1.1M |
|
2269
PUT
PennyMac Financial
PFSI
$3.23B
| $1.25M | ﹤0.01% |
14,300
-7,200
| -33% | -$774K |
|
2270
Immunovant
IMVT
$6.99B
| $1.25M | ﹤0.01% |
50,276
+1,865
| +4% | +$48.3K |
|
2271
SELLAS Life Sciences
SLS
$2.48B
| $1.25M | ﹤0.01% |
+295,162
| New | +$1.32M |
|
2272
Direxion Daily FTSE China Bear 3X ETF
YANG
$111M
| $1.25M | ﹤0.01% |
42,806
-49,286
| -54% | -$1.25M |
|
2273
BioNTech
BNTX
$24.8B
| $1.25M | ﹤0.01% |
+14,033
| New | +$1.44M |
|
2274
CALL
Scorpio Tankers
STNG
$4.2B
| $1.25M | ﹤0.01% |
16,700
-20,500
| -55% | -$1.37M |
|
2275
PUT
Tencent Music
TME
$12.9B
| $1.24M | ﹤0.01% |
133,900
+59,100
| +79% | +$873K |
|
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's Q1 2026 filing shows 2,157 new, 2,651 increased, 3,926 reduced and 1,574 closed positions. Its largest new stake was Amazon: 764,884 shares worth $159M. The largest sale was Apple, an estimated $174M.
By sector, the portfolio is most concentrated in Miscellaneous at 98% of assets, up from 98% a quarter earlier, followed by Technology and Communication Services.
- 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 2,157 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.