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 | |
|---|---|---|---|---|---|---|
3751
CALL
Teleflex
TFX
$5.94B
| $462K | ﹤0.01% |
2,200
+1,100
| +100% | +$231K |
|
3752
PUT
AudioEye
AEYE
$75.8M
| $461K | ﹤0.01% |
26,200
+8,400
| +47% | +$148K |
|
|
ETNB
3753
CALL
DELISTED
89bio
ETNB
| $461K | ﹤0.01% |
57,600
-41,700
| -42% | -$372K |
|
3754
CALL
STAAR Surgical
STAA
$1.13B
| $461K | ﹤0.01% |
9,700
-31,400
| -76% | -$1.38M |
|
|
BECN
3755
PUT
DELISTED
Beacon Roofing Supply, Inc.
BECN
| $461K | ﹤0.01% |
5,100
+1,600
| +46% | +$154K |
|
3756
Genius Sports
GENI
$1.95B
| $460K | ﹤0.01% |
84,406
+20,794
| +33% | +$111K |
|
3757
PUT
Piper Sandler
PIPR
$5.24B
| $460K | ﹤0.01% |
8,000
-800
| -9% | -$41K |
|
3758
PUT
USA Compression Partners
USAC
$3.75B
| $460K | ﹤0.01% |
19,400
-16,400
| -46% | -$405K |
|
3759
Green Plains
GPRE
$1.15B
| $459K | ﹤0.01% |
+28,950
| New | +$558K |
|
3760
Regency Centers
REG
$14.8B
| $459K | ﹤0.01% |
+7,394
| New | +$443K |
|
3761
PUT
TransUnion
TRU
$16.2B
| $459K | ﹤0.01% |
6,200
-6,300
| -50% | -$470K |
|
3762
PUT
Kilroy Realty
KRC
$4.5B
| $458K | ﹤0.01% |
14,700
+9,600
| +188% | +$319K |
|
3763
PUT
Amcor
AMCR
$21.6B
| $457K | ﹤0.01% |
9,360
+6,200
| +196% | +$301K |
|
3764
CALL
Grupo Cibest SA
CIB
$21.1B
| $457K | ﹤0.01% |
14,000
+200
| +1% | +$6.86K |
|
3765
CALL
EyePoint Inc
EYPT
$1B
| $457K | ﹤0.01% |
52,600
-117,500
| -69% | -$1.64M |
|
3766
CALL
Full Truck Alliance
YMM
$9.64B
| $457K | ﹤0.01% |
56,900
-101,700
| -64% | -$865K |
|
|
3767
Teleflex
TFX
$5.94B
| $456K | ﹤0.01% |
+2,169
| New | +$455K |
|
3768
Rayonier Advanced Materials
RYAM
$591M
| $454K | ﹤0.01% |
83,458
+45,287
| +119% | +$220K |
|
3769
PUT
NeoGenomics
NEO
$1.74B
| $453K | ﹤0.01% |
32,700
+26,000
| +388% | +$369K |
|
3770
CALL
News Corp Class B
NWS
$17.2B
| $453K | ﹤0.01% |
16,400
+14,000
| +583% | +$372K |
|
3771
PUT
Rentokil
RTO
$14.5B
| $453K | ﹤0.01% |
15,300
-13,800
| -47% | -$383K |
|
3772
PUT
Virco
VIRC
$94.7M
| $453K | ﹤0.01% |
+32,500
| New | +$403K |
|
3773
CALL
Alpha and Omega Semiconductor
AOSL
$863M
| $452K | ﹤0.01% |
12,100
+10,800
| +831% | +$285K |
|
3774
CALL
Cal-Maine
CALM
$4.42B
| $452K | ﹤0.01% |
7,400
-16,700
| -69% | -$991K |
|
3775
Sundial Growers
SNDL
$318M
| $452K | ﹤0.01% |
238,273
-51,282
| -18% | -$110K |
|
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.