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 | |
|---|---|---|---|---|---|---|
2826
American Financial Group
AFG
$11.9B
| $874K | ﹤0.01% |
6,656
+3,616
| +119% | +$467K |
|
2827
PUT
Sundial Growers
SNDL
$325M
| $874K | ﹤0.01% |
620,200
-204,700
| -25% | -$348K |
|
2828
CALL
Mitsubishi UFJ Financial
MUFG
$258B
| $873K | ﹤0.01% |
+64,100
| New | +$826K |
|
2829
McCormick & Company Non-Voting
MKC
$13.4B
| $872K | ﹤0.01% |
+10,606
| New | +$831K |
|
2830
CALL
MINISO
MNSO
$3.64B
| $872K | ﹤0.01% |
47,200
-7,100
| -13% | -$155K |
|
2831
PUT
B&G Foods
BGS
$285M
| $871K | ﹤0.01% |
126,800
-19,200
| -13% | -$128K |
|
2832
InMode
INMD
$872M
| $871K | ﹤0.01% |
49,151
-6,382
| -11% | -$115K |
|
2833
CALL
TORM
TRMD
$3.1B
| $871K | ﹤0.01% |
52,900
+44,500
| +530% | +$861K |
|
2834
PUT
Bitwise Bitcoin ETF
BITB
$2.46B
| $870K | ﹤0.01% |
19,400
-1,700
| -8% | -$86.2K |
|
2835
CALL
Cogent Communications
CCOI
$594M
| $870K | ﹤0.01% |
14,200
-4,400
| -24% | -$324K |
|
2836
PUT
VICI Properties
VICI
$29.4B
| $870K | ﹤0.01% |
26,700
-130,500
| -83% | -$4.02M |
|
2837
Ultragenyx Pharmaceutical
RARE
$2.65B
| $868K | ﹤0.01% |
23,991
+18,062
| +305% | +$751K |
|
|
SPR
2838
CALL
DELISTED
Spirit AeroSystems
SPR
| $868K | ﹤0.01% |
25,200
-74,800
| -75% | -$2.56M |
|
2839
PUT
Vanguard Emerging Markets Government Bond ETF
VWOB
$6.15B
| $867K | ﹤0.01% |
6,900
+4,800
| +229% | +$308K |
|
2840
PUT
Freshworks
FRSH
$2.84B
| $866K | ﹤0.01% |
61,400
-13,900
| -18% | -$233K |
|
|
NLOP
2841
CALL
Net Lease Office Properties
NLOP
$168M
| $866K | ﹤0.01% |
27,600
+6,800
| +33% | +$213K |
|
2842
PUT
Allot
ALLT
$374M
| $865K | ﹤0.01% |
151,500
+55,300
| +57% | +$387K |
|
2843
PUT
Agree Realty
ADC
$9.68B
| $864K | ﹤0.01% |
11,200
+10,700
| +2,140% | +$784K |
|
|
ATYR
2844
PUT
aTyr Pharma
ATYR
$46.4M
| $864K | ﹤0.01% |
286,100
+260,200
| +1,005% | +$949K |
|
2845
Stride
LRN
$3.69B
| $863K | ﹤0.01% |
+6,824
| New | +$862K |
|
2846
CALL
Dover
DOV
$27.2B
| $860K | ﹤0.01% |
4,900
-18,900
| -79% | -$3.63M |
|
|
IPG
2847
CALL
DELISTED
Interpublic Group of Companies
IPG
| $860K | ﹤0.01% |
31,700
-124,400
| -80% | -$3.41M |
|
2848
PUT
Itaú Unibanco
ITUB
$91.3B
| $860K | ﹤0.01% |
161,092
+65,920
| +69% | +$332K |
|
2849
CALL
United States Copper Index Fund
CPER
$742M
| $859K | ﹤0.01% |
27,200
-3,400
| -11% | -$98K |
|
2850
PUT
Simplify US Equity PLUS Convexity ETF
SPYC
$109M
| $859K | ﹤0.01% |
37,700
-32,000
| -46% | -$1.19M |
|
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.