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 | Technology | 0.41% |
| 2 | Consumer Discretionary | 0.22% |
| 3 | Healthcare | 0.17% |
| 4 | Communication Services | 0.15% |
| 5 | Financials | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2651
PUT
Sunoco
SUN
$14.2B
| $1.07M | ﹤0.01% |
18,400
-12,500
| -40% | -$707K |
|
2652
CALL
Opko Health
OPK
$921M
| $1.06M | ﹤0.01% |
641,900
+39,700
| +7% | +$65.4K |
|
2653
PUT
HDFC Bank
HDB
$119B
| $1.06M | ﹤0.01% |
32,000
-2,600
| -8% | -$79.3K |
|
2654
CALL
Concentrix
CNXC
$1.36B
| $1.06M | ﹤0.01% |
19,100
+2,000
| +12% | +$95.8K |
|
2655
CALL
Itaú Unibanco
ITUB
$91.3B
| $1.06M | ﹤0.01% |
198,996
-444,775
| -69% | -$2.24M |
|
|
APLS
2656
PUT
DELISTED
Apellis Pharmaceuticals
APLS
| $1.06M | ﹤0.01% |
48,500
+5,300
| +12% | +$146K |
|
2657
CALL
Banco Bradesco
BBD
$38.1B
| $1.06M | ﹤0.01% |
475,600
+64,700
| +16% | +$134K |
|
2658
CALL
FerroAtlántica
GSM
$628M
| $1.06M | ﹤0.01% |
285,400
+222,300
| +352% | +$857K |
|
2659
PUT
BlackBerry
BB
$5.01B
| $1.06M | ﹤0.01% |
280,600
-148,900
| -35% | -$678K |
|
2660
iShares MSCI Japan ETF
EWJ
$21.7B
| $1.06M | ﹤0.01% |
15,426
-63,615
| -80% | -$4.37M |
|
2661
PUT
Fastly Inc
FSLY
$3.17B
| $1.06M | ﹤0.01% |
167,100
-165,800
| -50% | -$1.39M |
|
2662
CALL
Vipshop
VIPS
$6.84B
| $1.05M | ﹤0.01% |
67,200
-10,700
| -14% | -$162K |
|
2663
CALL
Brookfield Renewable
BEPC
$6.12B
| $1.05M | ﹤0.01% |
37,700
-31,100
| -45% | -$853K |
|
2664
CALL
EXL Service
EXLS
$4.23B
| $1.05M | ﹤0.01% |
22,300
+16,500
| +284% | +$794K |
|
2665
CALL
Triumph Financial Inc
TFIN
$1.84B
| $1.05M | ﹤0.01% |
18,200
+17,700
| +3,540% | +$1.29M |
|
2666
CALL
Arch Capital
ACGL
$36.1B
| $1.05M | ﹤0.01% |
10,900
+3,000
| +38% | +$277K |
|
|
SNV
2667
CALL
DELISTED
Synovus
SNV
| $1.05M | ﹤0.01% |
22,400
-3,900
| -15% | -$201K |
|
2668
PUT
Brookfield
BN
$102B
| $1.04M | ﹤0.01% |
29,850
-2,850
| -9% | -$108K |
|
2669
Invesco CurrencyShares Euro Currency Trust
FXE
$331M
| $1.04M | ﹤0.01% |
10,429
-21,646
| -67% | -$2.11M |
|
2670
CALL
NovoCure
NVCR
$2.04B
| $1.04M | ﹤0.01% |
58,400
-35,600
| -38% | -$809K |
|
|
ZK
2671
DELISTED
Zeekr
ZK
| $1.04M | ﹤0.01% |
+43,176
| New | +$1.15M |
|
2672
CALL
ALPS REIT Dividend Dogs ETF
RDOG
$11.6M
| $1.04M | ﹤0.01% |
20,400
-26,800
| -57% | -$1.02M |
|
2673
PUT
Trupanion
TRUP
$1.05B
| $1.04M | ﹤0.01% |
27,900
-31,400
| -53% | -$1.31M |
|
2674
CALL
Brookfield Renewable
BEP
$10B
| $1.04M | ﹤0.01% |
46,800
+24,800
| +113% | +$554K |
|
2675
PUT
Tilray
TLRY
$479M
| $1.04M | ﹤0.01% |
157,670
-34,630
| -18% | -$320K |
|
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 withdrew a net $7.93B in Q1 2025, closing 1,547 positions and reducing 3,654 holdings. Its most notable exit was Alibaba, an estimated $66.7M position sold in full.
By sector, the portfolio is most concentrated in Technology at 0.41% of assets, down from 0.68% a quarter earlier, followed by Consumer Discretionary and Healthcare.
Against the trend, Simplex Trading opened a new position in iShares 20+ Year Treasury Bond ETF worth $278M.
- 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.