SUSQUEHANNA INTERNATIONAL GROUP, LLP

Position in REFR — Research Frontiers Inc

CIK 1446194 BALA CYNWYD, PA

Back to REFR Full portfolio

Position in REFR

as of Jun 30, 2026 · filed Aug 14, 2026 Compact

Position Value

$80,633

-$63,609 QoQ

Shares Held

155,066

-1.1% QoQ

Ownership

0.445%

of shares outstanding

% of Portfolio

0.00%

of 13F equity value

Holder Rank

of 34 holders

Holding Since

Mar 2020

25 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Common Shares in REFR Over Time

Shares Held

Position Value (USD)

Derivatives in REFR

reported options exposure · as of Mar 31, 2026

CallValue

$13,800

CallShares

15,000

PutValue

PutShares

Notional value of option positions as reported on Form 13F. Calls and puts are disclosed separately and do not net against the common-share stake above.

Position in Electronic Components

Technology · as of Jun 30, 2026

SUSQUEHANNA INTERNATIONAL GROUP, LLP holds $849,055,245 across 37 Electronic Components names. REFR ranks #31 (0.0% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	FN	Fabrinet	248,430	$139,637,534
2	CLS	Celestica Inc	337,122	$122,982,104
3	GLW	Corning Inc /Ny	477,677	$122,013,035
4	SANM	Sanmina Corp	470,065	$118,964,050
5	TTMI	Ttm Technologies Inc	546,927	$102,286,287
6	FLEX	Flex Ltd.	585,853	$94,949,195
7	VICR	Vicor Corp	133,641	$50,754,178
8	BELFA	Bel Fuse Inc /Nj	78,987	$26,305,830

All Filings in REFR

Export CSV

39 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$80,633	155,066	-1.1%	Shares	Other	2026-08-14
2026-03-31	$13,800	15,000	-3.8%	Call	Other	2026-05-15
2026-03-31	$144,242	156,786	+27.5%	Shares	Other	2026-05-15
2025-12-31	$20,436	15,600	-60.0%	Call	Other	2026-02-17
2025-12-31	$161,131	123,002	+33.9%	Shares	Other	2026-02-17
2025-09-30	$146,082	91,876	-29.5%	Shares	Other	2025-11-14
2025-06-30	$213,704	130,308	+8.0%	Shares	Other	2025-08-14
2025-03-31	$136,300	120,620	+41.4%	Shares	Other	2025-05-14
2024-12-31	$145,843	85,289	+56.3%	Shares	Other	2025-02-14
2024-09-30	$119,538	54,584	+27.8%	Shares	Defined	2024-11-14
2024-06-30	$78,614	42,725	+63.2%	Shares	Defined	2024-08-15
2023-12-31	$26,446	26,185	+149.5%	Shares	Defined	2024-02-14
2023-09-30	$11,334	10,495	-53.1%	Shares	Defined	2023-11-14
2023-06-30	$35,769	22,356	-38.5%	Shares	Defined	2023-08-11
2023-03-31	$66,690	39,000	+278.6%	Call	Defined	2023-05-16
2022-12-31	$19,673	10,300	-82.2%	Call	Defined	2023-02-14
2022-09-30	$123,114	57,800	+210.8%	Call	Defined	2022-11-14
2022-06-30	$32,364	18,600	-4.1%	Call	Defined	2022-08-15
2022-03-31	$69,847	36,379	-65.3%	Shares	Defined	2022-05-16
2022-03-31	$19,584	10,200	-68.1%	Put	Defined	2022-05-16
2021-12-31	$55,040	32,000	-29.2%	Put	Defined	2022-04-05
2021-12-31	$180,080	104,698	-30.9%	Shares	Defined	2022-04-05
2021-09-30	$115,712	45,200	+255.9%	Put	Defined	2021-11-15
2021-09-30	$387,816	151,491	+49.6%	Shares	Defined	2021-11-15
2021-09-30	$49,664	19,400	-2.0%	Call	Defined	2021-11-15
2021-06-30	$240,059	101,291	-15.9%	Shares	Defined	2021-08-11
2021-06-30	$46,926	19,800	-59.3%	Call	Defined	2021-08-11
2021-06-30	$30,099	12,700	-19.1%	Put	Defined	2021-08-11
2021-03-31	$341,950	120,405	+453.2%	Shares	Defined	2021-05-17
2021-03-31	$138,308	48,700	+170.6%	Call	Defined	2021-05-17
2020-12-31	$50,580	18,000	+13.2%	Call	Defined	2021-02-16
2020-12-31	$61,165	21,767	-74.1%	Shares	Defined	2021-02-16
2020-09-30	$42,930	15,900	-77.9%	Call	Defined	2020-11-16
2020-09-30	$227,199	84,148	+78.6%	Shares	Defined	2020-11-16
2020-06-30	$191,319	47,123	-12.1%	Shares	Defined	2020-08-14
2020-06-30	$291,508	71,800	+80.4%	Call	Defined	2020-08-14
2020-03-31	$125,472	53,621	—	Shares	Defined	2020-05-15
2020-03-31	$36,738	15,700	—	Put	Defined	2020-05-15
2020-03-31	$93,132	39,800	—	Call	Defined	2020-05-15
No filing history on record for this holder in this stock.