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 | Technology | 0.53% |
| 2 | Consumer Discretionary | 0.29% |
| 3 | Healthcare | 0.21% |
| 4 | Financials | 0.2% |
| 5 | Materials | 0.12% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
7251
CALL
Oramed Pharmaceuticals
ORMP
$171M
| $13K | ﹤0.01% |
5,300
+100
| +2% | +$238 |
|
7252
One Stop Systems
OSS
$291M
| $13K | ﹤0.01% |
+5,475
| New | +$14.6K |
|
7253
CALL
Pampa Energía
PAM
$4.56B
| $13K | ﹤0.01% |
300
-600
| -67% | -$27.4K |
|
7254
PUT
POSCO
PKX
$15.5B
| $13K | ﹤0.01% |
200
| – | – |
|
|
PRPH
7255
DELISTED
ProPhase Labs
PRPH
| $13K | ﹤0.01% |
324
+284
| +710% | +$14.9K |
|
7256
PUT
Rani Therapeutics
RANI
$92.1M
| $13K | ﹤0.01% |
3,600
-4,600
| -56% | -$23.8K |
|
7257
PUT
Arcus Biosciences
RCUS
$3.4B
| $13K | ﹤0.01% |
900
-13,400
| -94% | -$216K |
|
|
RDNW
7258
RideNow Group
RDNW
$251M
| $13K | ﹤0.01% |
+3,284
| New | +$18K |
|
7259
ProShares Ultra Technology
ROM
$1.07B
| $13K | ﹤0.01% |
187
-1,077
| -85% | -$66.1K |
|
7260
State Street SPDR Portfolio Long Term Treasury ETF
SPTL
$10.7B
| $13K | ﹤0.01% |
494
-1,738
| -78% | -$46.9K |
|
7261
PUT
Sportradar
SRAD
$4.38B
| $13K | ﹤0.01% |
1,200
-90,200
| -99% | -$938K |
|
7262
Sasol
SSL
$7.03B
| $13K | ﹤0.01% |
1,765
-3,524
| -67% | -$26.1K |
|
7263
Sutro Biopharma
STRO
$393M
| $13K | ﹤0.01% |
471
+365
| +344% | +$14.4K |
|
7264
ThredUp
TDUP
$760M
| $13K | ﹤0.01% |
7,877
+2,774
| +54% | +$5.06K |
|
|
TIXT
7265
PUT
DELISTED
TELUS International
TIXT
| $13K | ﹤0.01% |
2,300
+1,500
| +188% | +$10.5K |
|
7266
CALL
Turkcell
TKC
$4.78B
| $13K | ﹤0.01% |
+1,800
| New | +$11.8K |
|
7267
VOC Energy
VOC
$58M
| $13K | ﹤0.01% |
2,857
+2,581
| +935% | +$14.5K |
|
|
YMAB
7268
CALL
DELISTED
Y-mAbs Therapeutics
YMAB
| $13K | ﹤0.01% |
1,100
-700
| -39% | -$9.45K |
|
|
USAP
7269
CALL
DELISTED
Universal Stainless & Alloy
USAP
| $13K | ﹤0.01% |
500
-500
| -50% | -$14.7K |
|
|
DNMR
7270
CALL
DELISTED
Danimer Scientific, Inc.
DNMR
| $13K | ﹤0.01% |
1,370
-6,523
| -83% | -$203K |
|
|
SILK
7271
PUT
DELISTED
Silk Road Medical, Inc. Common Stock
SILK
| $13K | ﹤0.01% |
500
-4,500
| -90% | -$93.6K |
|
7272
PUT
American Financial Group
AFG
$12B
| $12K | ﹤0.01% |
100
-300
| -75% | -$38.6K |
|
7273
PUT
Arteris
AIP
$1.34B
| $12K | ﹤0.01% |
1,700
+1,200
| +240% | +$9.14K |
|
7274
Avient
AVNT
$3.41B
| $12K | ﹤0.01% |
287
-84
| -23% | -$3.68K |
|
|
JBIO
7275
PUT
Jade Biosciences
JBIO
$1.2B
| $12K | ﹤0.01% |
+217
| New | +$144K |
|
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 withdrew a net $19.2B in Q2 2024, closing 1,431 positions and reducing 4,061 holdings. Its most notable exit was Boeing, an estimated $61.6M position sold in full.
By sector, the portfolio is most concentrated in Technology at 0.53% of assets, up from 0.38% a quarter earlier, followed by Consumer Discretionary and Healthcare.
Against the trend, Simplex Trading opened a new position in Citigroup worth $77M.
- 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.