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 | |
|---|---|---|---|---|---|---|
2326
CALL
Harrow
HROW
$1.47B
| $1.17M | ﹤0.01% |
33,200
-50,500
| -60% | -$2.22M |
|
2327
LG Display
LPL
$2.93B
| $1.17M | ﹤0.01% |
301,696
+298,777
| +10,236% | +$1.26M |
|
2328
CALL
DTE Energy
DTE
$30.4B
| $1.17M | ﹤0.01% |
8,000
+1,400
| +21% | +$197K |
|
2329
iShares TIPS Bond ETF
TIP
$14.5B
| $1.17M | ﹤0.01% |
+10,586
| New | +$1.17M |
|
2330
CytomX Therapeutics
CTMX
$701M
| $1.17M | ﹤0.01% |
248,438
+224,387
| +933% | +$1.14M |
|
2331
PUT
Remitly
RELY
$4.91B
| $1.17M | ﹤0.01% |
74,500
+16,300
| +28% | +$241K |
|
|
SEZL
2332
CALL
Sezzle
SEZL
$5.28B
| $1.16M | ﹤0.01% |
18,400
+3,800
| +26% | +$259K |
|
2333
CALL
Tenaris
TS
$28.1B
| $1.16M | ﹤0.01% |
20,000
+3,100
| +18% | +$153K |
|
2334
PUT
Matador Resources
MTDR
$5.73B
| $1.16M | ﹤0.01% |
18,400
+8,800
| +92% | +$441K |
|
2335
SBA Communications
SBAC
$18.6B
| $1.16M | ﹤0.01% |
+6,747
| New | +$1.26M |
|
2336
PUT
Methanex
MEOH
$4.12B
| $1.16M | ﹤0.01% |
19,500
+17,100
| +713% | +$860K |
|
2337
PUT
Chemours
CC
$2.57B
| $1.16M | ﹤0.01% |
52,700
-4,000
| -7% | -$69.6K |
|
|
NUAI
2338
PUT
New Era Energy & Digital Inc
NUAI
$445M
| $1.16M | ﹤0.01% |
+285,900
| New | +$1.43M |
|
2339
PUT
Liberty Global Class C
LBTYK
$3.4B
| $1.16M | ﹤0.01% |
97,200
+33,300
| +52% | +$382K |
|
2340
Icahn Enterprises
IEP
$5.26B
| $1.16M | ﹤0.01% |
153,636
-26,870
| -15% | -$211K |
|
2341
PUT
Natera
NTRA
$36.1B
| $1.16M | ﹤0.01% |
5,800
-9,000
| -61% | -$1.94M |
|
2342
PUT
Listed Funds Trust Roundhill Magnificent Seven ETF
MAGS
$3.83B
| $1.16M | ﹤0.01% |
22,900
+8,800
| +62% | +$551K |
|
|
FRMM
2343
CALL
Forum Markets
FRMM
$70.3M
| $1.16M | ﹤0.01% |
400,800
-206,100
| -34% | -$787K |
|
2344
CALL
TransAlta
TAC
$4.03B
| $1.16M | ﹤0.01% |
88,400
-59,400
| -40% | -$765K |
|
2345
CALL
Brinker International
EAT
$8.5B
| $1.16M | ﹤0.01% |
8,100
-57,400
| -88% | -$8.74M |
|
2346
Equinox Gold
EQX
$7.22B
| $1.16M | ﹤0.01% |
79,930
-85,881
| -52% | -$1.31M |
|
2347
PUT
ArriVent BioPharma
AVBP
$1.4B
| $1.15M | ﹤0.01% |
50,000
+49,400
| +8,233% | +$1.12M |
|
2348
CALL
Cinemark Holdings
CNK
$4.09B
| $1.15M | ﹤0.01% |
40,400
-78,900
| -66% | -$2.02M |
|
|
SUNB
2349
CALL
Sunbelt Rentals Holdings
SUNB
$31B
| $1.15M | ﹤0.01% |
+17,700
| New | +$1.24M |
|
2350
PUT
Guidewire Software
GWRE
$13.3B
| $1.15M | ﹤0.01% |
7,700
+2,000
| +35% | +$304K |
|
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.