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 | |
|---|---|---|---|---|---|---|
2951
Satellogic
SATL
$491M
| $658K | ﹤0.01% |
120,925
+81,645
| +208% | +$301K |
|
2952
CALL
Hormel Foods
HRL
$14.2B
| $657K | ﹤0.01% |
29,000
-93,900
| -76% | -$2.24M |
|
|
WCC
2953
CALL
WESCO International
WCC
$15.1B
| $657K | ﹤0.01% |
2,400
+1,300
| +118% | +$365K |
|
|
WYFI
2954
CALL
WhiteFiber Inc
WYFI
$795M
| $656K | ﹤0.01% |
55,100
+12,900
| +31% | +$223K |
|
2955
PUT
Simplify US Equity PLUS Convexity ETF
SPYC
$109M
| $656K | ﹤0.01% |
+48,300
| New | +$2.03M |
|
2956
CALL
Klaviyo
KVYO
$5.8B
| $656K | ﹤0.01% |
33,700
-64,200
| -66% | -$1.38M |
|
2957
Ero Copper
ERO
$2.64B
| $654K | ﹤0.01% |
24,531
+16,739
| +215% | +$503K |
|
2958
CALL
Ardelyx
ARDX
$1.24B
| $654K | ﹤0.01% |
109,200
+57,800
| +112% | +$382K |
|
|
PPTA
2959
Perpetua Resources
PPTA
$2.16B
| $652K | ﹤0.01% |
23,193
+19,700
| +564% | +$595K |
|
2960
Innovative Solutions & Support
ISSC
$319M
| $651K | ﹤0.01% |
+31,723
| New | +$736K |
|
2961
Fortuna Silver Mines
FSM
$2.54B
| $650K | ﹤0.01% |
65,482
+54,548
| +499% | +$591K |
|
2962
Woodside Energy
WDS
$44.2B
| $649K | ﹤0.01% |
27,184
+26,484
| +3,783% | +$515K |
|
2963
PUT
SELLAS Life Sciences
SLS
$1.99B
| $649K | ﹤0.01% |
+153,400
| New | +$686K |
|
2964
CALL
Equifax
EFX
$22B
| $648K | ﹤0.01% |
3,600
-6,100
| -63% | -$1.21M |
|
2965
CALL
IQVIA
IQV
$40.7B
| $648K | ﹤0.01% |
3,800
+2,200
| +138% | +$429K |
|
2966
PUT
Keros Therapeutics
KROS
$197M
| $648K | ﹤0.01% |
58,700
+49,800
| +560% | +$769K |
|
2967
Designer Brands
DBI
$315M
| $648K | ﹤0.01% |
113,815
-134,929
| -54% | -$907K |
|
2968
Universal Technical Institute
UTI
$2.26B
| $648K | ﹤0.01% |
+17,937
| New | +$566K |
|
2969
Wave Life Sciences
WVE
$1.12B
| $647K | ﹤0.01% |
89,263
+68,137
| +323% | +$888K |
|
2970
PUT
Bruker
BRKR
$9.4B
| $647K | ﹤0.01% |
17,900
-17,500
| -49% | -$732K |
|
2971
CALL
Cedar Fair
FUN
$1.88B
| $646K | ﹤0.01% |
+36,400
| New | +$614K |
|
2972
PUT
Sundial Growers
SNDL
$312M
| $645K | ﹤0.01% |
488,900
-238,500
| -33% | -$364K |
|
2973
Canadian Solar
CSIQ
$932M
| $645K | ﹤0.01% |
+46,543
| New | +$886K |
|
2974
Stanley Black & Decker
SWK
$14.5B
| $644K | ﹤0.01% |
9,068
+740
| +9% | +$59.4K |
|
2975
PUT
Dave Inc
DAVE
$4.82B
| $644K | ﹤0.01% |
3,700
+1,100
| +42% | +$214K |
|
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.