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 | |
|---|---|---|---|---|---|---|
1376
CALL
abrdn Physical Gold Shares ETF
SGOL
$7.41B
| $4.49M | ﹤0.01% |
150,700
+138,900
| +1,177% | +$3.8M |
|
1377
CALL
Tractor Supply
TSCO
$18.2B
| $4.49M | ﹤0.01% |
81,500
-31,400
| -28% | -$1.72M |
|
1378
PUT
Sunrun
RUN
$2.14B
| $4.48M | ﹤0.01% |
765,100
-333,700
| -30% | -$2.75M |
|
1379
PUT
Fidelity Wise Origin Bitcoin Fund
FBTC
$14.8B
| $4.47M | ﹤0.01% |
62,100
+16,600
| +36% | +$1.35M |
|
1380
CALL
VeriSign
VRSN
$26.4B
| $4.47M | ﹤0.01% |
17,600
-24,900
| -59% | -$5.66M |
|
1381
CALL
Campbell Soup
CPB
$6.38B
| $4.46M | ﹤0.01% |
111,800
+42,900
| +62% | +$1.68M |
|
1382
Snowflake
SNOW
$117B
| $4.46M | ﹤0.01% |
+30,512
| New | +$5.18M |
|
|
FL
1383
PUT
DELISTED
Foot Locker
FL
| $4.46M | ﹤0.01% |
316,100
+103,900
| +49% | +$1.93M |
|
1384
PUT
T. Rowe Price
TROW
$23.4B
| $4.46M | ﹤0.01% |
48,500
-31,000
| -39% | -$3.28M |
|
|
MRP
1385
PUT
Millrose Properties Inc
MRP
$5.32B
| $4.45M | ﹤0.01% |
+168,000
| New | +$3.93M |
|
1386
CALL
Gartner
IT
$11.8B
| $4.45M | ﹤0.01% |
10,600
+9,800
| +1,225% | +$4.83M |
|
1387
PUT
Dominion Energy
D
$57.9B
| $4.45M | ﹤0.01% |
79,300
-43,500
| -35% | -$2.39M |
|
1388
PUT
VF Corp
VFC
$5.29B
| $4.44M | ﹤0.01% |
286,100
-1,362,100
| -83% | -$30.2M |
|
|
COOP
1389
CALL
DELISTED
Mr. Cooper
COOP
| $4.44M | ﹤0.01% |
37,100
-17,000
| -31% | -$1.78M |
|
1390
PUT
Tetra Tech
TTEK
$9.19B
| $4.44M | ﹤0.01% |
+151,700
| New | +$5.09M |
|
1391
CALL
PennyMac Financial
PFSI
$3.81B
| $4.41M | ﹤0.01% |
44,100
-26,300
| -37% | -$2.7M |
|
1392
PUT
Sprouts Farmers Market
SFM
$7.59B
| $4.41M | ﹤0.01% |
28,900
-115,300
| -80% | -$17.2M |
|
1393
CALL
American Water Works
AWK
$28B
| $4.4M | ﹤0.01% |
29,800
+26,000
| +684% | +$3.43M |
|
|
TGNA
1394
PUT
DELISTED
TEGNA Inc
TGNA
| $4.39M | ﹤0.01% |
241,100
+60,500
| +33% | +$1.09M |
|
|
1395
CALL
Sprouts Farmers Market
SFM
$7.59B
| $4.38M | ﹤0.01% |
28,700
-43,000
| -60% | -$6.41M |
|
1396
CALL
Tradeweb Markets
TW
$22.4B
| $4.38M | ﹤0.01% |
29,500
-1,500
| -5% | -$199K |
|
1397
CALL
DigitalOcean
DOCN
$13.2B
| $4.38M | ﹤0.01% |
131,100
-9,900
| -7% | -$387K |
|
1398
PUT
Texas Roadhouse
TXRH
$12.4B
| $4.37M | ﹤0.01% |
26,200
-6,200
| -19% | -$1.1M |
|
1399
CALL
Agilent Technologies
A
$42.5B
| $4.36M | ﹤0.01% |
37,300
-22,400
| -38% | -$3.02M |
|
1400
PUT
Monolithic Power Systems
MPWR
$60.1B
| $4.35M | ﹤0.01% |
7,500
-13,900
| -65% | -$8.76M |
|
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.