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 | |
|---|---|---|---|---|---|---|
1201
PUT
ProShares Ultra S&P500
SSO
$7.82B
| $5.87M | ﹤0.01% |
177,600
-800
| -0.4% | -$36.9K |
|
1202
PUT
LPL Financial
LPLA
$25.9B
| $5.86M | ﹤0.01% |
17,900
+6,500
| +57% | +$2.26M |
|
1203
PUT
Cinemark Holdings
CNK
$3.82B
| $5.85M | ﹤0.01% |
234,900
+138,900
| +145% | +$3.87M |
|
1204
CALL
Vanguard Consumer Discretionary ETF
VCR
$5.81B
| $5.83M | ﹤0.01% |
15,000
-32,500
| -68% | -$11.8M |
|
1205
CALL
Crocs
CROX
$6.58B
| $5.83M | ﹤0.01% |
54,900
-54,800
| -50% | -$5.68M |
|
1206
CALL
Franco-Nevada
FNV
$41.3B
| $5.83M | ﹤0.01% |
37,000
+3,300
| +10% | +$462K |
|
1207
Eastman Chemical
EMN
$7.77B
| $5.8M | ﹤0.01% |
+65,878
| New | +$6.22M |
|
1208
CALL
Golar LNG
GLNG
$5.07B
| $5.8M | ﹤0.01% |
152,800
+4,700
| +3% | +$184K |
|
1209
PUT
Klaviyo
KVYO
$4.69B
| $5.8M | ﹤0.01% |
191,800
+118,900
| +163% | +$4.8M |
|
1210
CALL
Fidelity National Information Services
FIS
$20.7B
| $5.79M | ﹤0.01% |
77,600
-124,800
| -62% | -$9.38M |
|
1211
CALL
Pan American Silver
PAAS
$18.6B
| $5.79M | ﹤0.01% |
224,300
-89,100
| -28% | -$2.13M |
|
|
PARA
1212
PUT
DELISTED
Paramount Global Class B
PARA
| $5.79M | ﹤0.01% |
484,300
-134,800
| -22% | -$1.51M |
|
1213
CALL
Lucid Motors
LCID
$2.52B
| $5.79M | ﹤0.01% |
239,290
+5,210
| +2% | +$139K |
|
1214
PUT
Coherent
COHR
$61.3B
| $5.78M | ﹤0.01% |
89,000
-167,300
| -65% | -$13.9M |
|
1215
PUT
Nutanix
NTNX
$14.2B
| $5.77M | ﹤0.01% |
82,600
-75,500
| -48% | -$5.22M |
|
1216
CALL
Yum! Brands
YUM
$40.6B
| $5.76M | ﹤0.01% |
36,600
-64,000
| -64% | -$9.22M |
|
1217
CALL
Matador Resources
MTDR
$6.42B
| $5.75M | ﹤0.01% |
112,600
+36,100
| +47% | +$2M |
|
|
NNE
1218
CALL
Nano Nuclear Energy
NNE
$880M
| $5.74M | ﹤0.01% |
217,100
-27,600
| -11% | -$843K |
|
1219
CALL
Rexford Industrial Realty
REXR
$8.12B
| $5.72M | ﹤0.01% |
146,200
+138,900
| +1,903% | +$5.56M |
|
1220
CALL
Vanguard Emerging Markets Government Bond ETF
VWOB
$6.14B
| $5.71M | ﹤0.01% |
44,400
+500
| +1% | +$32.1K |
|
1221
CALL
Nutrien
NTR
$32.9B
| $5.71M | ﹤0.01% |
115,000
-81,500
| -41% | -$4.17M |
|
1222
CALL
Royalty Pharma
RPRX
$26.2B
| $5.71M | ﹤0.01% |
183,500
+79,000
| +76% | +$2.5M |
|
1223
PUT
KLA
KLAC
$286B
| $5.71M | ﹤0.01% |
84,000
-178,000
| -68% | -$12.8M |
|
1224
CALL
News Corp Class B
NWS
$16.1B
| $5.7M | ﹤0.01% |
209,400
+195,600
| +1,417% | +$6.19M |
|
1225
CALL
F5
FFIV
$21.9B
| $5.7M | ﹤0.01% |
21,400
+200
| +0.9% | +$55.9K |
|
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.