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 |
Boeing
BA
|
+$55.8M |
| 2 |
Microsoft
MSFT
|
+$42.2M |
| 3 |
Pinduoduo
PDD
|
+$41.3M |
| 4 |
Apple
AAPL
|
+$32M |
| 5 |
Direxion Daily Semiconductor Bull 3X ETF
SOXL
|
+$28.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Broadcom
AVGO
|
+$95.2M |
| 2 |
Citigroup
C
|
+$57.2M |
| 3 |
Pfizer
PFE
|
+$56.4M |
| 4 |
TSMC
TSM
|
+$39.7M |
| 5 |
Starbucks
SBUX
|
+$35.5M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.4% |
| 2 | Consumer Discretionary | 0.29% |
| 3 | Healthcare | 0.15% |
| 4 | Industrials | 0.13% |
| 5 | Financials | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1201
PUT
Invesco CurrencyShares Japanese Yen Trust
FXY
$423M
| $7.63M | ﹤0.01% |
118,600
+102,800
| +651% | +$6.39M |
|
1202
PUT
Nasdaq
NDAQ
$52.3B
| $7.61M | ﹤0.01% |
104,300
+80,800
| +344% | +$5.52M |
|
|
1203
Pfizer
PFE
$140B
| $7.61M | ﹤0.01% |
262,966
-1,932,294
| -88% | -$56.4M |
|
1204
CALL
Westlake Corp
WLK
$9.46B
| $7.6M | ﹤0.01% |
50,600
+46,600
| +1,165% | +$6.7M |
|
1205
General Motors
GM
$74.2B
| $7.6M | ﹤0.01% |
+169,441
| New | +$7.85M |
|
1206
CALL
F5
FFIV
$21.9B
| $7.6M | ﹤0.01% |
34,500
-13,000
| -27% | -$2.52M |
|
1207
CALL
DaVita
DVA
$15.2B
| $7.59M | ﹤0.01% |
46,300
-20,700
| -31% | -$3.06M |
|
|
FL
1208
PUT
DELISTED
Foot Locker
FL
| $7.58M | ﹤0.01% |
293,400
-138,800
| -32% | -$3.84M |
|
|
FITB
1209
PUT
Fifth Third Bancorp
FITB
$52.1B
| $7.58M | ﹤0.01% |
176,900
+37,900
| +27% | +$1.54M |
|
1210
e.l.f. Beauty
ELF
$4.49B
| $7.58M | ﹤0.01% |
+69,490
| New | +$10.9M |
|
1211
PUT
Freshpet
FRPT
$2.83B
| $7.55M | ﹤0.01% |
55,200
+2,000
| +4% | +$262K |
|
1212
PUT
Keurig Dr Pepper
KDP
$40.4B
| $7.55M | ﹤0.01% |
201,400
+4,200
| +2% | +$148K |
|
1213
FedEx
FDX
$74.9B
| $7.54M | ﹤0.01% |
+27,543
| New | +$8M |
|
1214
Direxion Daily 20+ Year Treasury Bull 3X ETF
TMF
$2.23B
| $7.53M | ﹤0.01% |
130,339
-6,410
| -5% | -$359K |
|
1215
PUT
Parker-Hannifin
PH
$124B
| $7.52M | ﹤0.01% |
11,900
-6,700
| -36% | -$3.81M |
|
1216
PUT
Group 1 Automotive
GPI
$3.96B
| $7.51M | ﹤0.01% |
19,600
+16,900
| +626% | +$5.81M |
|
1217
PUT
Golar LNG
GLNG
$4.99B
| $7.51M | ﹤0.01% |
204,200
+63,100
| +45% | +$2.11M |
|
1218
PUT
JetBlue
JBLU
$1.95B
| $7.5M | ﹤0.01% |
1,143,600
-49,600
| -4% | -$279K |
|
1219
CALL
Southern Copper
SCCO
$141B
| $7.5M | ﹤0.01% |
68,823
-36,271
| -35% | -$3.57M |
|
1220
PUT
Clear Secure
YOU
$5.28B
| $7.48M | ﹤0.01% |
225,600
+174,700
| +343% | +$4.51M |
|
1221
PUT
Dutch Bros
BROS
$8.78B
| $7.47M | ﹤0.01% |
233,100
+149,300
| +178% | +$5.26M |
|
1222
PUT
Samsara
IOT
$19.2B
| $7.46M | ﹤0.01% |
155,000
-47,900
| -24% | -$1.94M |
|
1223
PUT
Western Alliance Bancorporation
WAL
$9.05B
| $7.46M | ﹤0.01% |
86,200
-39,900
| -32% | -$3.07M |
|
1224
PUT
Yum China
YUMC
$14.9B
| $7.46M | ﹤0.01% |
165,600
+79,600
| +93% | +$2.65M |
|
|
XIFR
1225
CALL
XPLR Infrastructure LP
XIFR
$1.19B
| $7.42M | ﹤0.01% |
268,800
-19,300
| -7% | -$501K |
|
Similar funds
Simplex Trading's Q3 2024 Portfolio in Review
As of Q3 2024, Simplex Trading held 9,964 positions worth $170B, up 5.3% from $162B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading's Q3 2024 filing shows 1,185 new, 3,232 increased, 3,829 reduced and 1,476 closed positions. Its largest new stake was Boeing: 325,328 shares worth $49.5M. The largest sale was Broadcom, an estimated $95.2M.
By sector, the portfolio is most concentrated in Technology at 0.4% of assets, down from 0.53% a quarter earlier, followed by Consumer Discretionary and Healthcare.
- Simplex Trading's largest Q3 2024 buy was Boeing: 325,328 shares worth $49.5M.
- Simplex Trading added most to Pinduoduo in Q3 2024, an estimated $41.3M increase.
- Simplex Trading's biggest Q3 2024 reduction was Citigroup, cutting an estimated $57.2M.
- Simplex Trading fully exited Broadcom in Q3 2024, selling an estimated $95.2M.
- Simplex Trading's ten largest holdings make up 50% of its $170B portfolio in Q3 2024.
- Simplex Trading opened 1,185 new positions and closed 1,476 in Q3 2024.
- Simplex Trading's portfolio value rose 5.3% quarter-over-quarter to $170B.
Based on Simplex Trading's 13F filing for Q3 2024, filed 8 Nov 2024.