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 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$272M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$99M |
| 3 |
NVIDIA
NVDA
|
+$89.9M |
| 4 |
TSMC
TSM
|
+$87.7M |
| 5 |
Amazon
AMZN
|
+$61M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$518M |
| 2 |
Strategy Inc
MSTR
|
+$81.2M |
| 3 |
Alibaba
BABA
|
+$66.7M |
| 4 |
Advanced Micro Devices
AMD
|
+$44.3M |
| 5 |
Uber
UBER
|
+$41.3M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Miscellaneous | 98.56% |
| 2 | Technology | 0.41% |
| 3 | Consumer Discretionary | 0.22% |
| 4 | Healthcare | 0.17% |
| 5 | Communication Services | 0.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1026
PUT
MSC Industrial Direct
MSM
$6.78B
| $7.84M | 0.01% |
100,900
+99,400
| +6,627% | +$7.96M |
|
|
GAP
1027
PUT
The Gap Inc
GAP
$7.88B
| $7.82M | 0.01% |
379,400
-548,700
| -59% | -$12.3M |
|
|
TLN
1028
PUT
Talen Energy Corp
TLN
$15.2B
| $7.81M | 0.01% |
39,100
-34,500
| -47% | -$7.48M |
|
1029
PUT
NuScale Power
SMR
$3.98B
| $7.8M | 0.01% |
550,900
+125,500
| +30% | +$2.54M |
|
1030
PUT
NetEase
NTES
$76.4B
| $7.79M | 0.01% |
75,700
-30,500
| -29% | -$3.07M |
|
1031
PUT
Archer Aviation
ACHR
$4.4B
| $7.78M | 0.01% |
1,094,800
+263,200
| +32% | +$2.34M |
|
1032
PUT
Prudential Financial
PRU
$42.1B
| $7.78M | 0.01% |
69,700
-214,700
| -75% | -$24.5M |
|
|
SHNY
1033
CALL
DELISTED
Direxion Daily Silver Miners Index Bull 2X Shares
SHNY
| $7.77M | 0.01% |
694,000
-600,800
| -46% | -$6.73M |
|
1034
Cameco
CCJ
$43.9B
| $7.75M | 0.01% |
188,210
+131,414
| +231% | +$6.19M |
|
1035
PUT
DuPont de Nemours
DD
$17.8B
| $7.74M | 0.01% |
82,614
-115,915
| -58% | -$11.3M |
|
1036
PUT
Pan American Silver
PAAS
$21.3B
| $7.69M | ﹤0.01% |
297,800
-58,100
| -16% | -$1.39M |
|
1037
PUT
Cognizant
CTSH
$28.1B
| $7.69M | ﹤0.01% |
284,900
+169,600
| +147% | +$13.8M |
|
1038
CALL
Grab
GRAB
$14B
| $7.67M | ﹤0.01% |
1,693,300
+636,600
| +60% | +$2.97M |
|
1039
PUT
Tractor Supply
TSCO
$18.2B
| $7.67M | ﹤0.01% |
139,200
+2,700
| +2% | +$148K |
|
1040
PUT
Equinix
EQIX
$102B
| $7.66M | ﹤0.01% |
9,400
+2,900
| +45% | +$2.61M |
|
1041
Truist Financial
TFC
$63.1B
| $7.66M | ﹤0.01% |
+186,150
| New | +$8.29M |
|
1042
3M
MMM
$86.9B
| $7.66M | ﹤0.01% |
52,139
+46,594
| +840% | +$6.85M |
|
1043
PUT
Bilibili
BILI
$6.37B
| $7.65M | ﹤0.01% |
400,400
-1,081,700
| -73% | -$20.8M |
|
1044
CALL
Zoetis
ZTS
$31.3B
| $7.62M | ﹤0.01% |
46,300
+11,300
| +32% | +$1.88M |
|
1045
CALL
Royal Gold
RGLD
$22.2B
| $7.62M | ﹤0.01% |
46,600
-29,700
| -39% | -$4.36M |
|
1046
PUT
Bunge Global
BG
$22.8B
| $7.59M | ﹤0.01% |
99,300
-1,800
| -2% | -$135K |
|
1047
CALL
Invesco S&P SmallCap Low Volatility ETF
XSLV
$253M
| $7.58M | ﹤0.01% |
203,200
-43,800
| -18% | -$2.05M |
|
1048
PUT
BHP
BHP
$230B
| $7.56M | ﹤0.01% |
155,800
| – | – |
|
1049
CALL
Eos Energy Enterprises
EOSE
$1.41B
| $7.55M | ﹤0.01% |
1,998,600
-471,600
| -19% | -$2.3M |
|
1050
PUT
Quest Diagnostics
DGX
$26.2B
| $7.53M | ﹤0.01% |
44,500
+39,800
| +847% | +$6.54M |
|
Similar funds
Simplex Trading's Q1 2025 Portfolio in Review
As of Q1 2025, Simplex Trading held 10,070 positions worth $156B, down 13% from $179B the previous quarter. Its ten largest holdings account for 51% of the portfolio.
Simplex Trading's Q1 2025 filing shows 1,566 new, 3,139 increased, 3,654 reduced and 1,547 closed positions. Its largest new stake was iShares 20+ Year Treasury Bond ETF: 3,057,978 shares worth $278M. The largest sale was Apple, an estimated $518M.
By sector, the portfolio is most concentrated in Miscellaneous at 99% of assets, up from 98% a quarter earlier, followed by Technology and Consumer Discretionary.
- Simplex Trading's largest Q1 2025 buy was iShares 20+ Year Treasury Bond ETF: 3,057,978 shares worth $278M.
- Simplex Trading added most to NVIDIA in Q1 2025, an estimated $89.9M increase.
- Simplex Trading's biggest Q1 2025 reduction was Apple, cutting an estimated $518M.
- Simplex Trading fully exited Alibaba in Q1 2025, selling an estimated $66.7M.
- Simplex Trading's ten largest holdings make up 51% of its $156B portfolio in Q1 2025.
- Simplex Trading opened 1,566 new positions and closed 1,547 in Q1 2025.
- Simplex Trading's portfolio value fell 13% quarter-over-quarter to $156B.
Based on Simplex Trading's 13F filing for Q1 2025, filed 12 May 2025.