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 | |
|---|---|---|---|---|---|---|
876
CALL
Progressive
PGR
$120B
| $10.3M | 0.01% |
36,300
-168,600
| -82% | -$44.1M |
|
877
CALL
AerCap
AER
$23.3B
| $10.3M | 0.01% |
100,500
+54,400
| +118% | +$5.38M |
|
878
PUT
Aflac
AFL
$63.3B
| $10.3M | 0.01% |
92,200
-53,500
| -37% | -$5.67M |
|
879
PUT
Intercontinental Exchange
ICE
$80.9B
| $10.2M | 0.01% |
59,400
-78,600
| -57% | -$12.9M |
|
880
CALL
WillScot Mobile Mini Holdings
WSC
$4.87B
| $10.2M | 0.01% |
367,700
-271,900
| -43% | -$9.24M |
|
881
CALL
American Tower
AMT
$76.5B
| $10.1M | 0.01% |
46,600
-42,300
| -48% | -$8.3M |
|
882
PUT
AB InBev
BUD
$155B
| $10.1M | 0.01% |
164,700
+43,400
| +36% | +$2.37M |
|
883
CALL
StoneCo
STNE
$2.65B
| $10.1M | 0.01% |
965,800
+732,600
| +314% | +$6.9M |
|
|
EXE
884
PUT
Expand Energy Corp
EXE
$22.1B
| $10.1M | 0.01% |
90,400
+6,900
| +8% | +$718K |
|
885
CALL
Clorox
CLX
$11.3B
| $10.1M | 0.01% |
68,300
+12,300
| +22% | +$1.88M |
|
886
CALL
ZIM Integrated Shipping Services
ZIM
$3.07B
| $10.1M | 0.01% |
688,900
+179,700
| +35% | +$3.37M |
|
887
CALL
Rocket Companies
RKT
$36.2B
| $10M | 0.01% |
830,600
+337,100
| +68% | +$4.35M |
|
888
PUT
Crocs
CROX
$6.56B
| $10M | 0.01% |
94,300
-11,600
| -11% | -$1.2M |
|
889
CALL
argenx
ARGX
$57.1B
| $10M | 0.01% |
16,900
-8,000
| -32% | -$5.05M |
|
890
Honeywell
HON
$77.4B
| $9.99M | 0.01% |
50,085
+8,730
| +21% | +$1.77M |
|
|
DOCU
891
PUT
DocuSign
DOCU
$8.98B
| $9.99M | 0.01% |
122,700
-147,500
| -55% | -$12.9M |
|
892
CALL
MP Materials
MP
$7.88B
| $9.96M | 0.01% |
408,100
+20,300
| +5% | +$472K |
|
893
CALL
Alamos Gold
AGI
$12.3B
| $9.96M | 0.01% |
372,300
-89,900
| -19% | -$2.03M |
|
894
PUT
DaVita
DVA
$15B
| $9.93M | 0.01% |
64,900
-3,100
| -5% | -$487K |
|
895
General Motors
GM
$72.1B
| $9.93M | 0.01% |
211,047
+198,942
| +1,643% | +$9.8M |
|
896
JD.com
JD
$40.5B
| $9.92M | 0.01% |
241,198
-68,469
| -22% | -$2.75M |
|
|
ZVOL
897
PUT
Volatility Premium Plus ETF
ZVOL
$12.9M
| $9.91M | 0.01% |
583,500
-61,300
| -10% | -$1.09M |
|
898
Snap
SNAP
$7.37B
| $9.88M | 0.01% |
+1,134,433
| New | +$11.8M |
|
899
PUT
Prologis
PLD
$135B
| $9.87M | 0.01% |
88,300
-17,700
| -17% | -$2.05M |
|
900
PUT
Valaris
VAL
$5.48B
| $9.86M | 0.01% |
251,200
+182,900
| +268% | +$7.84M |
|
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.