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 |
Microsoft
MSFT
|
+$234M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$97.5M |
| 3 |
Amazon
AMZN
|
+$96.8M |
| 4 |
iShares Bitcoin Trust
IBIT
|
+$80.6M |
| 5 |
Pinduoduo
PDD
|
+$54.9M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$129M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$92.9M |
| 3 |
Broadcom
AVGO
|
+$82.9M |
| 4 |
Alphabet (Google) Class C
GOOG
|
+$68.4M |
| 5 |
Meta Platforms (Facebook)
META
|
+$59.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.79% |
| 2 | Consumer Discretionary | 0.3% |
| 3 | Healthcare | 0.25% |
| 4 | Financials | 0.17% |
| 5 | Industrials | 0.09% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1776
Vanguard High Dividend Yield ETF
VYM
$81.1B
| $3.55M | ﹤0.01% |
25,191
+20,264
| +411% | +$2.78M |
|
1777
CALL
Baxter International
BAX
$11.6B
| $3.55M | ﹤0.01% |
155,800
+86,600
| +125% | +$2.2M |
|
1778
CALL
Agree Realty
ADC
$9.68B
| $3.54M | ﹤0.01% |
49,900
-13,100
| -21% | -$949K |
|
1779
CALL
TG Therapeutics
TGTX
$8.58B
| $3.54M | ﹤0.01% |
98,000
-114,300
| -54% | -$3.76M |
|
1780
CALL
Raymond James Financial
RJF
$32.5B
| $3.54M | ﹤0.01% |
20,500
+2,800
| +16% | +$464K |
|
|
JPGE
1781
CALL
DELISTED
JPMorgan Diversified Return Global Equity ETF
JPGE
| $3.53M | ﹤0.01% |
61,700
-18,300
| -23% | -$1.05M |
|
|
EXAS
1782
PUT
DELISTED
Exact Sciences
EXAS
| $3.53M | ﹤0.01% |
64,500
+5,400
| +9% | +$270K |
|
|
INFA
1783
CALL
DELISTED
Informatica
INFA
| $3.53M | ﹤0.01% |
142,000
+29,100
| +26% | +$718K |
|
1784
CALL
International Flavors & Fragrances
IFF
$19.4B
| $3.53M | ﹤0.01% |
57,300
+10,600
| +23% | +$728K |
|
1785
CALL
BorgWarner
BWA
$13.2B
| $3.51M | ﹤0.01% |
79,800
-29,800
| -27% | -$1.19M |
|
|
MRSH
1786
CALL
Marsh
MRSH
$86.3B
| $3.51M | ﹤0.01% |
17,400
+2,900
| +20% | +$596K |
|
1787
PUT
Aptiv
APTV
$12B
| $3.5M | ﹤0.01% |
40,600
-43,400
| -52% | -$3.27M |
|
1788
CALL
Western Alliance Bancorporation
WAL
$9.07B
| $3.49M | ﹤0.01% |
40,300
+2,200
| +6% | +$186K |
|
1789
PUT
Bitwise Bitcoin ETF
BITB
$2.46B
| $3.48M | ﹤0.01% |
56,000
+8,000
| +17% | +$498K |
|
1790
CALL
Harmony Gold Mining
HMY
$9.92B
| $3.48M | ﹤0.01% |
192,000
+83,100
| +76% | +$1.25M |
|
1791
Annaly Capital Management
NLY
$16.9B
| $3.48M | ﹤0.01% |
172,334
+125,030
| +264% | +$2.59M |
|
1792
CALL
Valvoline
VVV
$4.97B
| $3.48M | ﹤0.01% |
96,800
+6,300
| +7% | +$240K |
|
1793
ProShares Short QQQ
PSQ
$694M
| $3.48M | ﹤0.01% |
111,969
-273,939
| -71% | -$8.95M |
|
1794
CALL
iShares Core MSCI Emerging Markets ETF
IEMG
$149B
| $3.47M | ﹤0.01% |
48,100
-60,000
| -56% | -$3.74M |
|
1795
CALL
Natera
NTRA
$37.5B
| $3.46M | ﹤0.01% |
21,500
+13,900
| +183% | +$2.2M |
|
1796
CALL
BellRing Brands
BRBR
$1.51B
| $3.45M | ﹤0.01% |
95,000
+45,000
| +90% | +$2.03M |
|
1797
PUT
ChargePoint
CHPT
$133M
| $3.45M | ﹤0.01% |
316,100
+307,315
| +3,498% | +$3.52M |
|
|
DQ
1798
CALL
Daqo New Energy
DQ
$790M
| $3.45M | ﹤0.01% |
122,700
+68,000
| +124% | +$1.59M |
|
1799
PUT
Royal Gold
RGLD
$17.1B
| $3.45M | ﹤0.01% |
17,200
-3,000
| -15% | -$519K |
|
1800
ProShares Ultra Gold
UGL
$650M
| $3.44M | ﹤0.01% |
74,676
+68,391
| +1,088% | +$2.57M |
|
Similar funds
Simplex Trading's Q3 2025 Portfolio in Review
As of Q3 2025, Simplex Trading held 10,358 positions worth $195B, up 12% from $175B the previous quarter. Its ten largest holdings account for 46% of the portfolio.
Simplex Trading's Q3 2025 filing shows 1,743 new, 3,828 increased, 3,250 reduced and 1,308 closed positions. Its largest new stake was Microsoft: 458,309 shares worth $237M. The largest sale was iShares 20+ Year Treasury Bond ETF, an estimated $129M.
By sector, the portfolio is most concentrated in Technology at 0.79% of assets, up from 0.74% a quarter earlier, followed by Consumer Discretionary and Healthcare.
- Simplex Trading's largest Q3 2025 buy was Microsoft: 458,309 shares worth $237M.
- Simplex Trading added most to iShares Russell 2000 ETF in Q3 2025, an estimated $97.5M increase.
- Simplex Trading's biggest Q3 2025 reduction was Alphabet (Google) Class A, cutting an estimated $92.9M.
- Simplex Trading fully exited iShares 20+ Year Treasury Bond ETF in Q3 2025, selling an estimated $129M.
- Simplex Trading's ten largest holdings make up 46% of its $195B portfolio in Q3 2025.
- Simplex Trading opened 1,743 new positions and closed 1,308 in Q3 2025.
- Simplex Trading's portfolio value rose 12% quarter-over-quarter to $195B.
Based on Simplex Trading's 13F filing for Q3 2025, filed 12 Nov 2025.