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
|
+$53.9M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$52.9M |
| 3 |
NVIDIA
NVDA
|
+$47.1M |
| 4 |
PayPal
PYPL
|
+$41.7M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$28.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$51.4M |
| 2 |
Walmart Inc
WMT
|
+$46.4M |
| 3 |
VanEck Oil Services ETF
OIH
|
+$34.2M |
| 4 |
Adobe
ADBE
|
+$33.5M |
| 5 |
Starbucks
SBUX
|
+$26.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.41% |
| 2 | Healthcare | 0.21% |
| 3 | Consumer Discretionary | 0.21% |
| 4 | Communication Services | 0.2% |
| 5 | Financials | 0.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
201
PUT
Union Pacific
UNP
$174B
| $73.7M | 0.06% |
360,100
-223,000
| -38% | -$44.3M |
|
202
CALL
FedEx
FDX
$76.3B
| $73.7M | 0.06% |
297,200
-131,300
| -31% | -$30M |
|
203
CALL
Direxion Daily Technology Bull 3x ETF
TECL
$5.53B
| $73.6M | 0.06% |
2,848,300
+404,700
| +17% | +$16.8M |
|
204
PUT
3M
MMM
$90.6B
| $72.5M | 0.06% |
865,784
+56,451
| +7% | +$4.8M |
|
205
PUT
D.R. Horton
DHI
$40B
| $72.3M | 0.06% |
594,000
+166,400
| +39% | +$18.2M |
|
206
CALL
Ford
F
$57.5B
| $72.1M | 0.06% |
4,762,900
+998,400
| +27% | +$12.6M |
|
207
CALL
Occidental Petroleum
OXY
$57.3B
| $71.9M | 0.06% |
1,222,400
-892,200
| -42% | -$53.5M |
|
208
PUT
American Airlines Group
AAL
$9.91B
| $71.4M | 0.06% |
3,980,800
-2,390,300
| -38% | -$35M |
|
209
CALL
Accenture
ACN
$85.7B
| $70.6M | 0.06% |
228,800
-1,000
| -0.4% | -$291K |
|
|
KFYP
210
CALL
DELISTED
KraneShares CICC China Leaders 100 Index ETF
KFYP
| $70.4M | 0.06% |
2,614,300
-1,773,000
| -40% | -$42.1M |
|
211
CALL
Booking.com
BKNG
$138B
| $70.2M | 0.06% |
650,000
+22,500
| +4% | +$2.38M |
|
212
PUT
VanEck Durable High Dividend ETF
DURA
$38.4M
| $70M | 0.06% |
248,400
-167,400
| -40% | -$5.22M |
|
213
PUT
Ulta Beauty
ULTA
$20.6B
| $69.1M | 0.06% |
146,800
-30,100
| -17% | -$14.7M |
|
214
PUT
JD.com
JD
$40.7B
| $68.1M | 0.06% |
1,994,100
+71,100
| +4% | +$2.59M |
|
215
PUT
CVS Health
CVS
$140B
| $68M | 0.06% |
984,000
+302,000
| +44% | +$21.5M |
|
216
CALL
Lam Research
LRCX
$397B
| $67.7M | 0.06% |
1,053,000
-910,000
| -46% | -$51.3M |
|
217
CALL
ARK Space & Defense Innovation ETF
ARKX
$825M
| $67.6M | 0.06% |
1,546,200
-915,000
| -37% | -$12.7M |
|
218
CALL
Elevance Health
ELV
$85.3B
| $67.1M | 0.06% |
151,100
+119,500
| +378% | +$55.1M |
|
219
PUT
Moderna
MRNA
$23.4B
| $67.1M | 0.06% |
551,900
-140,700
| -20% | -$18.8M |
|
220
PUT
Zscaler
ZS
$23.2B
| $66.9M | 0.06% |
457,300
-154,200
| -25% | -$18.8M |
|
221
CALL
Zoom
ZM
$25.3B
| $66.3M | 0.05% |
977,200
+315,100
| +48% | +$21.1M |
|
222
PUT
Texas Instruments
TXN
$264B
| $64.4M | 0.05% |
357,700
+30,000
| +9% | +$5.16M |
|
223
PUT
United Rentals
URI
$64.1B
| $64.3M | 0.05% |
144,400
+47,100
| +48% | +$17.5M |
|
224
PUT
United Parcel Service
UPS
$99.2B
| $64M | 0.05% |
357,100
+15,300
| +4% | +$2.72M |
|
225
PUT
Marvell Technology
MRVL
$190B
| $63.7M | 0.05% |
1,065,100
-351,400
| -25% | -$17.1M |
|
Similar funds
Simplex Trading's Q2 2023 Portfolio in Review
As of Q2 2023, Simplex Trading held 10,535 positions worth $122B, up 6.9% from $114B the previous quarter. Its ten largest holdings account for 43% of the portfolio.
Simplex Trading's Q2 2023 filing shows 1,474 new, 3,350 increased, 3,913 reduced and 1,517 closed positions. Its largest new stake was Microsoft: 171,935 shares worth $58.5M. The largest sale was Apple, an estimated $51.4M.
By sector, the portfolio is most concentrated in Technology at 0.41% of assets, down from 0.42% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q2 2023 buy was Microsoft: 171,935 shares worth $58.5M.
- Simplex Trading added most to iShares 20+ Year Treasury Bond ETF in Q2 2023, an estimated $52.9M increase.
- Simplex Trading's biggest Q2 2023 reduction was Adobe, cutting an estimated $33.5M.
- Simplex Trading fully exited Apple in Q2 2023, selling an estimated $51.4M.
- Simplex Trading's ten largest holdings make up 43% of its $122B portfolio in Q2 2023.
- Simplex Trading opened 1,474 new positions and closed 1,517 in Q2 2023.
- Simplex Trading's portfolio value rose 6.9% quarter-over-quarter to $122B.
Based on Simplex Trading's 13F filing for Q2 2023, filed 4 Aug 2023.