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 | |
|---|---|---|---|---|---|---|
1301
CALL
Baker Hughes
BKR
$56.8B
| $6.05M | ﹤0.01% |
124,200
-104,600
| -46% | -$4.62M |
|
1302
CALL
Hertz
HTZ
$572M
| $6.04M | ﹤0.01% |
889,000
-386,200
| -30% | -$2.48M |
|
1303
Ford
F
$57.3B
| $6.03M | ﹤0.01% |
504,282
+128,900
| +34% | +$1.49M |
|
1304
PUT
Annaly Capital Management
NLY
$16.9B
| $6.03M | ﹤0.01% |
298,400
+50,700
| +20% | +$1.05M |
|
1305
PUT
DuPont de Nemours
DD
$18.6B
| $6.03M | ﹤0.01% |
61,662
+5,497
| +10% | +$518K |
|
1306
PUT
iShares Core MSCI Emerging Markets ETF
IEMG
$149B
| $6.02M | ﹤0.01% |
83,200
-35,600
| -30% | -$2.22M |
|
1307
CALL
BHP
BHP
$213B
| $6M | ﹤0.01% |
107,700
-11,700
| -10% | -$623K |
|
1308
Novartis
NVS
$295B
| $6M | ﹤0.01% |
46,811
+23,108
| +97% | +$2.82M |
|
1309
PUT
Brookfield Asset Management
BAM
$74B
| $6M | ﹤0.01% |
105,400
-5,000
| -5% | -$297K |
|
1310
PUT
Grayscale Bitcoin Trust
GBTC
$9.64B
| $6M | ﹤0.01% |
66,800
-14,800
| -18% | -$1.33M |
|
|
GPGI
1311
PUT
GPGI Inc
GPGI
$4.06B
| $5.96M | ﹤0.01% |
286,400
-5,600
| -2% | -$96.9K |
|
1312
CALL
DigitalOcean
DOCN
$14.4B
| $5.95M | ﹤0.01% |
174,200
-7,100
| -4% | -$225K |
|
1313
CALL
Invesco CurrencyShares Japanese Yen Trust
FXY
$423M
| $5.95M | ﹤0.01% |
95,600
+12,400
| +15% | +$774K |
|
1314
CALL
Generac Holdings
GNRC
$11.9B
| $5.94M | ﹤0.01% |
35,500
-4,900
| -12% | -$858K |
|
1315
CALL
CF Industries
CF
$19.2B
| $5.94M | ﹤0.01% |
66,200
-111,700
| -63% | -$9.96M |
|
|
GTM
1316
PUT
ZoomInfo Technologies
GTM
$861M
| $5.92M | ﹤0.01% |
542,900
+314,200
| +137% | +$3.37M |
|
1317
CALL
Darden Restaurants
DRI
$22.5B
| $5.92M | ﹤0.01% |
31,100
+6,000
| +24% | +$1.23M |
|
|
NNE
1318
CALL
Nano Nuclear Energy
NNE
$813M
| $5.9M | ﹤0.01% |
153,100
-81,400
| -35% | -$2.89M |
|
1319
CALL
Intuitive Machines
LUNR
$2.07B
| $5.9M | ﹤0.01% |
560,600
+229,500
| +69% | +$2.33M |
|
1320
PUT
Welltower
WELL
$178B
| $5.88M | ﹤0.01% |
33,000
-32,800
| -50% | -$5.39M |
|
1321
PUT
ZIM Integrated Shipping Services
ZIM
$3B
| $5.87M | ﹤0.01% |
433,300
-177,000
| -29% | -$2.69M |
|
1322
CALL
Remitly
RELY
$4.74B
| $5.86M | ﹤0.01% |
359,700
+332,900
| +1,242% | +$5.97M |
|
1323
CALL
Imperial Oil
IMO
$62.1B
| $5.83M | ﹤0.01% |
64,300
+54,500
| +556% | +$4.71M |
|
1324
Alcoa
AA
$11.7B
| $5.83M | ﹤0.01% |
177,349
+141,141
| +390% | +$4.39M |
|
1325
PUT
Nasdaq
NDAQ
$52.1B
| $5.83M | ﹤0.01% |
65,900
+58,800
| +828% | +$5.45M |
|
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.