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 | |
|---|---|---|---|---|---|---|
|
FWDI
3351
CALL
Forward Industries Inc
FWDI
$303M
| $464K | ﹤0.01% |
104,800
+2,300
| +2% | +$13.1K |
|
3352
Sony
SONY
$134B
| $463K | ﹤0.01% |
22,364
-62,150
| -74% | -$1.39M |
|
3353
CALL
Atmos Energy
ATO
$29.1B
| $462K | ﹤0.01% |
2,500
+2,100
| +525% | +$371K |
|
3354
ProShares VIX Mid-Term Futures ETF
VIXM
$56.3M
| $462K | ﹤0.01% |
26,917
+11,080
| +70% | +$175K |
|
3355
CALL
Vanguard FTSE Developed Markets ETF
VEA
$230B
| $461K | ﹤0.01% |
7,200
+900
| +14% | +$59.4K |
|
3356
NGL Energy Partners
NGL
$2.01B
| $461K | ﹤0.01% |
+37,418
| New | +$425K |
|
3357
United Microelectronic
UMC
$47.5B
| $461K | ﹤0.01% |
+51,364
| New | +$501K |
|
3358
Vanguard S&P 500 Value ETF
VOOV
$6.61B
| $461K | ﹤0.01% |
+2,261
| New | +$473K |
|
3359
Vermilion Energy
VET
$1.76B
| $461K | ﹤0.01% |
33,422
+31,181
| +1,391% | +$331K |
|
|
CPRX
3360
PUT
DELISTED
Catalyst Pharmaceutical
CPRX
| $461K | ﹤0.01% |
+18,600
| New | +$443K |
|
3361
Danaos Corp
DAC
$2.59B
| $460K | ﹤0.01% |
4,085
+1,075
| +36% | +$115K |
|
3362
CALL
RB Global
RBA
$20.5B
| $460K | ﹤0.01% |
4,800
+4,600
| +2,300% | +$488K |
|
3363
UFP Technologies
UFPT
$1.97B
| $460K | ﹤0.01% |
2,376
+2,281
| +2,401% | +$528K |
|
3364
CALL
Varonis Systems
VRNS
$4.59B
| $459K | ﹤0.01% |
21,400
+6,400
| +43% | +$174K |
|
3365
NNN REIT
NNN
$9.16B
| $459K | ﹤0.01% |
10,921
+3,555
| +48% | +$153K |
|
3366
Hafnia
HAFN
$3.84B
| $459K | ﹤0.01% |
60,394
+45,475
| +305% | +$302K |
|
3367
PUT
Bank OZK
OZK
$5.57B
| $459K | ﹤0.01% |
10,000
-67,600
| -87% | -$3.18M |
|
3368
PUT
Flowers Foods
FLO
$1.51B
| $459K | ﹤0.01% |
56,300
-41,000
| -42% | -$411K |
|
3369
ING
ING
$99.8B
| $459K | ﹤0.01% |
+17,607
| New | +$495K |
|
3370
PUT
CorMedix
CRMD
$588M
| $458K | ﹤0.01% |
67,500
+28,000
| +71% | +$207K |
|
3371
The GEO Group
GEO
$4.1B
| $458K | ﹤0.01% |
+27,236
| New | +$433K |
|
3372
CALL
Western Union
WU
$2.4B
| $457K | ﹤0.01% |
52,400
+4,100
| +8% | +$38.8K |
|
3373
PUT
Koppers
KOP
$942M
| $456K | ﹤0.01% |
11,800
+10,900
| +1,211% | +$364K |
|
3374
CALL
Burlington
BURL
$23.4B
| $456K | ﹤0.01% |
1,400
-2,600
| -65% | -$796K |
|
|
DGXX
3375
CALL
Digi Power X Inc
DGXX
$374M
| $456K | ﹤0.01% |
224,400
+141,900
| +172% | +$372K |
|
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.