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 | |
|---|---|---|---|---|---|---|
2876
PUT
Gold Fields
GFI
$28.8B
| $704K | ﹤0.01% |
15,500
-210,700
| -93% | -$10.6M |
|
2877
PUT
Coursera
COUR
$1.77B
| $703K | ﹤0.01% |
120,800
+68,100
| +129% | +$425K |
|
2878
CALL
Innodata
INOD
$1.81B
| $703K | ﹤0.01% |
18,200
-42,300
| -70% | -$2.11M |
|
2879
Talkspace
TALK
$874M
| $702K | ﹤0.01% |
135,715
+19,170
| +16% | +$84.8K |
|
2880
AbCellera Biologics
ABCL
$1.65B
| $702K | ﹤0.01% |
+201,236
| New | +$724K |
|
2881
PUT
Targa Resources
TRGP
$56.8B
| $702K | ﹤0.01% |
2,800
-100
| -3% | -$21.7K |
|
2882
ConocoPhillips
COP
$144B
| $702K | ﹤0.01% |
+5,315
| New | +$589K |
|
2883
CALL
Black Stone Minerals
BSM
$3.14B
| $702K | ﹤0.01% |
46,400
+38,900
| +519% | +$577K |
|
2884
CALL
Federal Realty Investment Trust
FRT
$10.9B
| $701K | ﹤0.01% |
6,600
+6,100
| +1,220% | +$638K |
|
2885
Weatherford International
WFRD
$5.9B
| $700K | ﹤0.01% |
7,405
+7,073
| +2,130% | +$666K |
|
|
ORLA
2886
PUT
Orla Mining
ORLA
$3.36B
| $698K | ﹤0.01% |
43,300
-6,500
| -13% | -$108K |
|
2887
PUT
Edwards Lifesciences
EW
$49.4B
| $697K | ﹤0.01% |
8,700
-51,400
| -86% | -$4.24M |
|
2888
PUT
American Coastal Insurance
ACIC
$536M
| $696K | ﹤0.01% |
+61,900
| New | +$695K |
|
2889
AXIS Capital
AXS
$7.73B
| $696K | ﹤0.01% |
+6,862
| New | +$704K |
|
|
CSGS
2890
PUT
DELISTED
CSG Systems International
CSGS
| $695K | ﹤0.01% |
8,700
+6,900
| +383% | +$550K |
|
|
TPC
2891
Tutor Perini Cor
TPC
$4.03B
| $695K | ﹤0.01% |
9,005
+2,760
| +44% | +$211K |
|
2892
Magna International
MGA
$18.8B
| $695K | ﹤0.01% |
+12,454
| New | +$711K |
|
2893
PUT
Sutro Biopharma
STRO
$386M
| $695K | ﹤0.01% |
27,900
+27,200
| +3,886% | +$492K |
|
|
KC
2894
PUT
Kingsoft Cloud Holdings
KC
$2.96B
| $695K | ﹤0.01% |
52,000
+39,400
| +313% | +$515K |
|
2895
CALL
Group 1 Automotive
GPI
$4.26B
| $694K | ﹤0.01% |
2,100
+1,400
| +200% | +$488K |
|
2896
CALL
Turning Point Brands
TPB
$1.48B
| $694K | ﹤0.01% |
8,000
+900
| +13% | +$100K |
|
2897
CALL
Emergent Biosolutions
EBS
$379M
| $694K | ﹤0.01% |
83,600
-24,800
| -23% | -$257K |
|
2898
PUT
Replimune Group
REPL
$455M
| $694K | ﹤0.01% |
90,700
-4,700
| -5% | -$35.9K |
|
2899
PTC Therapeutics
PTCT
$6.18B
| $694K | ﹤0.01% |
10,180
+9,639
| +1,782% | +$683K |
|
2900
CALL
Eve Holding
EVEX
$777M
| $693K | ﹤0.01% |
279,300
+188,200
| +207% | +$643K |
|
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.