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 |
NVIDIA
NVDA
|
+$93M |
| 2 |
Citigroup
C
|
+$74.8M |
| 3 |
Pinduoduo
PDD
|
+$50.7M |
| 4 |
Intel
INTC
|
+$47.1M |
| 5 |
Broadcom
AVGO
|
+$46.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$94.5M |
| 2 |
Pfizer
PFE
|
+$66.4M |
| 3 |
Boeing
BA
|
+$61.6M |
| 4 |
PayPal
PYPL
|
+$42.2M |
| 5 |
GE Aerospace
GE
|
+$42M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Miscellaneous | 98.27% |
| 2 | Technology | 0.53% |
| 3 | Consumer Discretionary | 0.29% |
| 4 | Healthcare | 0.21% |
| 5 | Financials | 0.2% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
301
CALL
American International
AIG
$39.8B
| $49.5M | 0.03% |
666,100
+220,600
| +50% | +$16.9M |
|
302
PUT
Intuitive Surgical
ISRG
$130B
| $49.1M | 0.03% |
110,300
-215,200
| -66% | -$85.7M |
|
303
CALL
Hewlett Packard
HPE
$69B
| $49M | 0.03% |
2,314,700
+1,217,300
| +111% | +$22.4M |
|
304
CALL
Spotify
SPOT
$112B
| $49M | 0.03% |
156,000
-132,100
| -46% | -$39.8M |
|
305
CALL
Dick's Sporting Goods
DKS
$12.4B
| $48.4M | 0.03% |
225,100
-31,100
| -12% | -$6.48M |
|
306
CALL
Best Buy
BBY
$19B
| $48.3M | 0.03% |
572,700
+380,500
| +198% | +$30.2M |
|
307
CALL
Pinterest
PINS
$11.6B
| $48.2M | 0.03% |
1,093,900
-394,800
| -27% | -$15.6M |
|
308
PUT
Accenture
ACN
$114B
| $48.1M | 0.03% |
158,600
-57,800
| -27% | -$17.7M |
|
309
PUT
Lowe's Companies
LOW
$115B
| $47.7M | 0.03% |
285,700
-67,300
| -19% | -$15.4M |
|
310
PUT
Comcast
CMCSA
$94B
| $47.6M | 0.03% |
1,216,600
-230,200
| -16% | -$9.01M |
|
311
CALL
Snap
SNAP
$9.25B
| $47.6M | 0.03% |
2,867,700
-2,030,600
| -41% | -$29.1M |
|
312
CALL
Archer Daniels Midland
ADM
$40.8B
| $47.6M | 0.03% |
787,300
-293,600
| -27% | -$18M |
|
313
PUT
Thermo Fisher Scientific
TMO
$227B
| $47.2M | 0.03% |
85,400
+22,500
| +36% | +$12.9M |
|
314
PUT
Boston Scientific
BSX
$69.3B
| $47.1M | 0.03% |
611,700
+75,200
| +14% | +$5.5M |
|
315
PUT
Mercado Libre
MELI
$100B
| $47M | 0.03% |
28,600
+4,500
| +19% | +$7.1M |
|
316
PUT
MetLife
MET
$62B
| $46.8M | 0.03% |
666,400
+333,700
| +100% | +$23.8M |
|
317
PUT
Wingstop
WING
$2.97B
| $46.6M | 0.03% |
110,200
-28,400
| -20% | -$10.9M |
|
318
CALL
Kroger
KR
$35.9B
| $45.9M | 0.03% |
918,800
+209,100
| +29% | +$11.3M |
|
319
PUT
Marathon Digital Holdings
MARA
$4.37B
| $45.9M | 0.03% |
2,310,300
-425,700
| -16% | -$8.08M |
|
320
CALL
Deere & Co
DE
$187B
| $45.7M | 0.03% |
122,400
-45,700
| -27% | -$17.8M |
|
|
B
321
CALL
Barrick Mining
B
$73.7B
| $45.7M | 0.03% |
2,740,600
+556,300
| +25% | +$9.44M |
|
322
PUT
Blackrock
BLK
$174B
| $45.7M | 0.03% |
58,000
+14,600
| +34% | +$11.4M |
|
|
323
CALL
Intuitive Surgical
ISRG
$130B
| $45.5M | 0.03% |
102,200
-44,000
| -30% | -$17.5M |
|
324
PUT
Wynn Resorts
WYNN
$9.43B
| $45.4M | 0.03% |
507,200
-85,000
| -14% | -$8.16M |
|
325
PUT
Baidu
BIDU
$33.7B
| $45.2M | 0.03% |
522,400
-164,300
| -24% | -$16.5M |
|
Similar funds
Simplex Trading's Q2 2024 Portfolio in Review
As of Q2 2024, Simplex Trading held 10,213 positions worth $162B, down 6.5% from $173B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading's Q2 2024 filing shows 1,358 new, 3,196 increased, 4,061 reduced and 1,431 closed positions. Its largest new stake was Citigroup: 1,213,247 shares worth $77M. The largest sale was State Street Energy Select Sector SPDR ETF, an estimated $94.5M.
By sector, the portfolio is most concentrated in Miscellaneous at 98% of assets, down from 98% a quarter earlier, followed by Technology and Consumer Discretionary.
- Simplex Trading's largest Q2 2024 buy was Citigroup: 1,213,247 shares worth $77M.
- Simplex Trading added most to NVIDIA in Q2 2024, an estimated $93M increase.
- Simplex Trading's biggest Q2 2024 reduction was State Street Energy Select Sector SPDR ETF, cutting an estimated $94.5M.
- Simplex Trading fully exited Boeing in Q2 2024, selling an estimated $61.6M.
- Simplex Trading's ten largest holdings make up 50% of its $162B portfolio in Q2 2024.
- Simplex Trading opened 1,358 new positions and closed 1,431 in Q2 2024.
- Simplex Trading's portfolio value fell 6.5% quarter-over-quarter to $162B.
Based on Simplex Trading's 13F filing for Q2 2024, filed 25 Jul 2024.